Papers
21.
López-Méndez, R.; Dubrova, A.; Reguera, J.; Magro, R.; Esteban-Betegón, F.; Parente, A.; García, M. Ángel; Camarero, J.; Fonda, E.; Wilhelm, C.; Muñoz-Noval, Á.; Espinosa, A.
In: Advanced Healthcare Materials, 2024.
@article{lopez-mendez_multiscale_2024,
title = {Multiscale Thermal Analysis of Gold Nanostars in 3D Tumor Spheroids: Integrating Cellular-Level Photothermal Effects and Nanothermometry via X-Ray Spectroscopy},
author = {R. López-Méndez and A. Dubrova and J. Reguera and R. Magro and F. Esteban-Betegón and A. Parente and M. Ángel García and J. Camarero and E. Fonda and C. Wilhelm and Á. Muñoz-Noval and A. Espinosa},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211457250&doi=10.1002%2fadhm.202403799&partnerID=40&md5=b108578ec953bcc4b0e7221a86256fa9},
doi = {10.1002/adhm.202403799},
year = {2024},
date = {2024-01-01},
journal = {Advanced Healthcare Materials},
abstract = {In the pursuit of enhancing cancer treatment efficacy while minimizing side effects, near-infrared (NIR) photothermal therapy (PTT) has emerged as a promising approach. By using photothermally active nanomaterials, PTT enables localized hyperthermia, effectively eliminating cancer cells with minimal invasiveness and toxicity. Among these nanomaterials, gold nanostars (AuNS) stand out due to their tunable plasmon resonance and efficient light absorption. This study addresses the challenge of measuring nanoscale temperatures during AuNS-mediated PTT by employing X-ray absorption spectroscopy (XAS) within 3D tumor spheroids. It also aims to investigate the heat generated at the nanoscale and the resultant biological damage observed at a larger scale, utilizing confocal microscopy to establish connections between AuNS heat generation, tissue damage, and their impacts on cellular structure. These nanoscale and microscale thermal effects have been compared with macroscopic values obtained from infrared thermography, as part of a multiscale thermal analysis. The findings underscore the efficacy of AuNS in enhancing PTT and provide insights into the spatial distribution of thermal effects within tumor tissues. This research advances the understanding of localized hyperthermia in cancer therapy and underscores the potential of AuNS-based PTT for clinical applications. © 2024 The Author(s). Advanced Healthcare Materials published by Wiley-VCH GmbH.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In the pursuit of enhancing cancer treatment efficacy while minimizing side effects, near-infrared (NIR) photothermal therapy (PTT) has emerged as a promising approach. By using photothermally active nanomaterials, PTT enables localized hyperthermia, effectively eliminating cancer cells with minimal invasiveness and toxicity. Among these nanomaterials, gold nanostars (AuNS) stand out due to their tunable plasmon resonance and efficient light absorption. This study addresses the challenge of measuring nanoscale temperatures during AuNS-mediated PTT by employing X-ray absorption spectroscopy (XAS) within 3D tumor spheroids. It also aims to investigate the heat generated at the nanoscale and the resultant biological damage observed at a larger scale, utilizing confocal microscopy to establish connections between AuNS heat generation, tissue damage, and their impacts on cellular structure. These nanoscale and microscale thermal effects have been compared with macroscopic values obtained from infrared thermography, as part of a multiscale thermal analysis. The findings underscore the efficacy of AuNS in enhancing PTT and provide insights into the spatial distribution of thermal effects within tumor tissues. This research advances the understanding of localized hyperthermia in cancer therapy and underscores the potential of AuNS-based PTT for clinical applications. © 2024 The Author(s). Advanced Healthcare Materials published by Wiley-VCH GmbH.
22.
Villamiel, M.; Cortés-Avendaño, P.; Ferreira-Lazarte, A.; Condezo-Hoyos, L.
Chemistry of ultrasound processing Book Section
In: Chemistry of Thermal and Non-Thermal Food Processing Technologies, pp. 175–199, 2024.
@incollection{villamiel_chemistry_2024,
title = {Chemistry of ultrasound processing},
author = {M. Villamiel and P. Cortés-Avendaño and A. Ferreira-Lazarte and L. Condezo-Hoyos},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85213539730&doi=10.1016%2fB978-0-443-22182-8.00010-3&partnerID=40&md5=2cbeec51c739a6ac70c0962cad7b9662},
doi = {10.1016/B978-0-443-22182-8.00010-3},
year = {2024},
date = {2024-01-01},
booktitle = {Chemistry of Thermal and Non-Thermal Food Processing Technologies},
pages = {175–199},
abstract = {The increasing demand for high-quality, additive-free foods in the last decades has sparked a growing interest in advanced technologies that can meet this rising demand for top-notch quality products while preserving the original properties of foods. This chapter has delved into the dynamic relationship between nutritional properties and the evolving technologies that are reshaping the realm of food production, particularly ultrasound. The revision here carried out comprises the main general aspects related to the application of ultrasound and the involved mechanisms. We have included the effect of single and intermediate frequency on the main components of food such as lipids, proteins, enzymes, carbohydrates, and bioactive compounds. Special attention has been pain to the impact of intermediate-frequency ultrasound on the functionalization of phenolic moieties. © 2025 Elsevier Inc. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {incollection}
}
The increasing demand for high-quality, additive-free foods in the last decades has sparked a growing interest in advanced technologies that can meet this rising demand for top-notch quality products while preserving the original properties of foods. This chapter has delved into the dynamic relationship between nutritional properties and the evolving technologies that are reshaping the realm of food production, particularly ultrasound. The revision here carried out comprises the main general aspects related to the application of ultrasound and the involved mechanisms. We have included the effect of single and intermediate frequency on the main components of food such as lipids, proteins, enzymes, carbohydrates, and bioactive compounds. Special attention has been pain to the impact of intermediate-frequency ultrasound on the functionalization of phenolic moieties. © 2025 Elsevier Inc. All rights reserved.
23.
Noah, A.; Fridman, N.; Zur, Y.; Markman, M.; King, Y. K.; Klang, M.; Rama-Eiroa, R.; Solanki, H.; Ashby, M. L. R.; Levin, T.; Herrera, E.; Huber, M. E.; Gazit, S.; Santos, E. J. G.; Suderow, H.; Steinberg, H.; Millo, O.; Anahory, Y.
Field-Induced Antiferromagnetic Correlations in a Nanopatterned Van der Waals Ferromagnet: A Potential Artificial Spin Ice Journal Article
In: Advanced Science, 2024.
@article{noah_field-induced_2024,
title = {Field-Induced Antiferromagnetic Correlations in a Nanopatterned Van der Waals Ferromagnet: A Potential Artificial Spin Ice},
author = {A. Noah and N. Fridman and Y. Zur and M. Markman and Y. K. King and M. Klang and R. Rama-Eiroa and H. Solanki and M. L. R. Ashby and T. Levin and E. Herrera and M. E. Huber and S. Gazit and E. J. G. Santos and H. Suderow and H. Steinberg and O. Millo and Y. Anahory},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211095215&doi=10.1002%2fadvs.202409240&partnerID=40&md5=c6593a196d357a573e8354dbb3f31e74},
doi = {10.1002/advs.202409240},
year = {2024},
date = {2024-01-01},
journal = {Advanced Science},
abstract = {Nano-patterned magnetic materials have opened new venues for the investigation of strongly correlated phenomena including artificial spin-ice systems, geometric frustration, and magnetic monopoles, for technologically important applications such as reconfigurable ferromagnetism. With the advent of atomically thin 2D van der Waals (vdW) magnets, a pertinent question is whether such compounds could make their way into this realm where interactions can be tailored so that unconventional states of matter can be assessed. Here, it is shown that square islands of CrGeTe3 vdW ferromagnets distributed in a grid manifest antiferromagnetic correlations, essential to enable frustration resulting in an artificial spin-ice. By using a combination of SQUID-on-tip microscopy, focused ion beam lithography, and atomistic spin dynamic simulations, it is shown that a square array of CGT island as small as 150 × 150 × 60 nm3 have tunable dipole–dipole interactions, which can be precisely controlled by their lateral spacing. There is a crossover between non-interacting islands and significant inter-island anticorrelation depending on how they are spatially distributed allowing the creation of complex magnetic patterns not observable at the isolated flakes. These findings suggest that the cross-talk between the nano-patterned magnets can be explored in the generation of even more complex spin configurations where exotic interactions may be manipulated in an unprecedented way. © 2024 The Author(s). Advanced Science published by Wiley-VCH GmbH.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Nano-patterned magnetic materials have opened new venues for the investigation of strongly correlated phenomena including artificial spin-ice systems, geometric frustration, and magnetic monopoles, for technologically important applications such as reconfigurable ferromagnetism. With the advent of atomically thin 2D van der Waals (vdW) magnets, a pertinent question is whether such compounds could make their way into this realm where interactions can be tailored so that unconventional states of matter can be assessed. Here, it is shown that square islands of CrGeTe3 vdW ferromagnets distributed in a grid manifest antiferromagnetic correlations, essential to enable frustration resulting in an artificial spin-ice. By using a combination of SQUID-on-tip microscopy, focused ion beam lithography, and atomistic spin dynamic simulations, it is shown that a square array of CGT island as small as 150 × 150 × 60 nm3 have tunable dipole–dipole interactions, which can be precisely controlled by their lateral spacing. There is a crossover between non-interacting islands and significant inter-island anticorrelation depending on how they are spatially distributed allowing the creation of complex magnetic patterns not observable at the isolated flakes. These findings suggest that the cross-talk between the nano-patterned magnets can be explored in the generation of even more complex spin configurations where exotic interactions may be manipulated in an unprecedented way. © 2024 The Author(s). Advanced Science published by Wiley-VCH GmbH.
24.
Ros-Oton, X.; Torres-Latorre, C.; Weidner, M.
Semiconvexity estimates for nonlinear integro-differential equations Journal Article
In: Communications on Pure and Applied Mathematics, 2024.
@article{ros-oton_semiconvexity_2024,
title = {Semiconvexity estimates for nonlinear integro-differential equations},
author = {X. Ros-Oton and C. Torres-Latorre and M. Weidner},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85208922547&doi=10.1002%2fcpa.22237&partnerID=40&md5=cec638291d92ce02b5e8c09d52df1296},
doi = {10.1002/cpa.22237},
year = {2024},
date = {2024-01-01},
journal = {Communications on Pure and Applied Mathematics},
abstract = {In this paper we establish for the first time local semiconvexity estimates for fully nonlinear equations and for obstacle problems driven by integro-differential operators with general kernels. Our proof is based on the Bernstein technique, which we develop for a natural class of nonlocal operators and consider to be of independent interest. In particular, we solve an open problem from Cabré-Dipierro-Valdinoci. As an application of our result, we establish optimal regularity estimates and smoothness of the free boundary near regular points for the nonlocal obstacle problem on domains. Finally, we also extend the Bernstein technique to parabolic equations and nonsymmetric operators. © 2024 The Author(s). Communications on Pure and Applied Mathematics published by Wiley Periodicals LLC.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper we establish for the first time local semiconvexity estimates for fully nonlinear equations and for obstacle problems driven by integro-differential operators with general kernels. Our proof is based on the Bernstein technique, which we develop for a natural class of nonlocal operators and consider to be of independent interest. In particular, we solve an open problem from Cabré-Dipierro-Valdinoci. As an application of our result, we establish optimal regularity estimates and smoothness of the free boundary near regular points for the nonlocal obstacle problem on domains. Finally, we also extend the Bernstein technique to parabolic equations and nonsymmetric operators. © 2024 The Author(s). Communications on Pure and Applied Mathematics published by Wiley Periodicals LLC.
25.
Martínez-Ratón, Y.; Velasco, E.
Density-functional theory for clustering of two-dimensional hard particle fluids Journal Article
In: Journal of Molecular Liquids, vol. 397, 2024.
@article{martinez-raton_density-functional_2024,
title = {Density-functional theory for clustering of two-dimensional hard particle fluids},
author = {Y. Martínez-Ratón and E. Velasco},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184753354&doi=10.1016%2fj.molliq.2024.124044&partnerID=40&md5=7bdb2cda89458c964c163bb6610b926e},
doi = {10.1016/j.molliq.2024.124044},
year = {2024},
date = {2024-01-01},
journal = {Journal of Molecular Liquids},
volume = {397},
abstract = {Fluids made of two-dimensional hard particles with polygonal shapes may stabilize symmetries which do not result directly from the particle shape. This is due to the formation of clusters in the fluid. Entropy alone can drive these effects, which represent a challenge for standard theories. In this article we present a general density-functional theory for clustering effects in fluids of hard particles in two dimensions. The theory combines a free-energy functional of the angular distribution function with an association energy term which qualitatively reproduces the clustering tendencies of the particles found in Monte Carlo simulations. Application is made to a fluid of hard right-angled triangles. © 2024},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Fluids made of two-dimensional hard particles with polygonal shapes may stabilize symmetries which do not result directly from the particle shape. This is due to the formation of clusters in the fluid. Entropy alone can drive these effects, which represent a challenge for standard theories. In this article we present a general density-functional theory for clustering effects in fluids of hard particles in two dimensions. The theory combines a free-energy functional of the angular distribution function with an association energy term which qualitatively reproduces the clustering tendencies of the particles found in Monte Carlo simulations. Application is made to a fluid of hard right-angled triangles. © 2024
26.
Ersu, G.; Munuera, C.; Mompean, F. J.; Vaquero, D.; Quereda, J.; Rodrigues, J. E. F. S.; Alonso, J. A.; Flores, E.; Ares, J. R.; Ferrer, I. J.; Al-Enizi, A. M.; Nafady, A.; Kuriakose, S.; Island, J. O.; Castellanos-Gomez, A.
Low-Cost and Biodegradable Thermoelectric Devices Based on van der Waals Semiconductors on Paper Substrates Journal Article
In: Energy and Environmental Materials, vol. 7, no. 1, 2024.
@article{ersu_low-cost_2024,
title = {Low-Cost and Biodegradable Thermoelectric Devices Based on van der Waals Semiconductors on Paper Substrates},
author = {G. Ersu and C. Munuera and F. J. Mompean and D. Vaquero and J. Quereda and J. E. F. S. Rodrigues and J. A. Alonso and E. Flores and J. R. Ares and I. J. Ferrer and A. M. Al-Enizi and A. Nafady and S. Kuriakose and J. O. Island and A. Castellanos-Gomez},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146326106&doi=10.1002%2feem2.12488&partnerID=40&md5=a8862d038a9233b578406824e1dc4cd0},
doi = {10.1002/eem2.12488},
year = {2024},
date = {2024-01-01},
journal = {Energy and Environmental Materials},
volume = {7},
number = {1},
abstract = {We present a method to fabricate handcrafted thermoelectric devices on standard office paper substrates. The devices are based on thin films of WS2, Te, and BP (P-type semiconductors) and TiS3 and TiS2 (N-type semiconductors), deposited by simply rubbing powder of these materials against paper. The thermoelectric properties of these semiconducting films revealed maximum Seebeck coefficients of (+1.32 ± 0.27) mV K−1 and (−0.82 ± 0.15) mV K−1 for WS2 and TiS3, respectively. Additionally, Peltier elements were fabricated by interconnecting the P- and N-type films with graphite electrodes. A thermopower value up to 6.11 mV K−1 was obtained when the Peltier element were constructed with three junctions. The findings of this work show proof-of-concept devices to illustrate the potential application of semiconducting van der Waals materials in future thermoelectric power generation as well as temperature sensing for low-cost disposable electronic devices. © 2022 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We present a method to fabricate handcrafted thermoelectric devices on standard office paper substrates. The devices are based on thin films of WS2, Te, and BP (P-type semiconductors) and TiS3 and TiS2 (N-type semiconductors), deposited by simply rubbing powder of these materials against paper. The thermoelectric properties of these semiconducting films revealed maximum Seebeck coefficients of (+1.32 ± 0.27) mV K−1 and (−0.82 ± 0.15) mV K−1 for WS2 and TiS3, respectively. Additionally, Peltier elements were fabricated by interconnecting the P- and N-type films with graphite electrodes. A thermopower value up to 6.11 mV K−1 was obtained when the Peltier element were constructed with three junctions. The findings of this work show proof-of-concept devices to illustrate the potential application of semiconducting van der Waals materials in future thermoelectric power generation as well as temperature sensing for low-cost disposable electronic devices. © 2022 The Authors. Energy & Environmental Materials published by John Wiley & Sons Australia, Ltd on behalf of Zhengzhou University.
27.
Roldán-Piñero, C.; Luengo-Márquez, J.; Assenza, S.; Pérez, R.
Systematic Comparison of Atomistic Force Fields for the Mechanical Properties of Double-Stranded DNA Journal Article
In: Journal of Chemical Theory and Computation, vol. 20, no. 5, pp. 2261–2272, 2024.
@article{roldan-pinero_systematic_2024,
title = {Systematic Comparison of Atomistic Force Fields for the Mechanical Properties of Double-Stranded DNA},
author = {C. Roldán-Piñero and J. Luengo-Márquez and S. Assenza and R. Pérez},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186468171&doi=10.1021%2facs.jctc.3c01089&partnerID=40&md5=66ecd9bf962709e2fb0be2e11c7f680f},
doi = {10.1021/acs.jctc.3c01089},
year = {2024},
date = {2024-01-01},
journal = {Journal of Chemical Theory and Computation},
volume = {20},
number = {5},
pages = {2261–2272},
abstract = {The response of double-stranded DNA to external mechanical stress plays a central role in its interactions with the protein machinery in the cell. Modern atomistic force fields have been shown to provide highly accurate predictions for the fine structural features of the duplex. In contrast, and despite their pivotal function, less attention has been devoted to the accuracy of the prediction of the elastic parameters. Several reports have addressed the flexibility of double-stranded DNA via all-atom molecular dynamics, yet the collected information is insufficient to have a clear understanding of the relative performance of the various force fields. In this work, we fill this gap by performing a systematic study in which several systems, characterized by different sequence contexts, are simulated with the most popular force fields within the AMBER family, bcs1 and OL15, as well as with CHARMM36. Analysis of our results, together with their comparison with previous work focused on bsc0, allows us to unveil the differences in the predicted rigidity between the newest force fields and suggests a roadmap to test their performance against experiments. In the case of the stretch modulus, we reconcile these differences, showing that a single mapping between sequence-dependent conformation and elasticity via the crookedness parameter captures simultaneously the results of all force fields, supporting the key role of crookedness in the mechanical response of double-stranded DNA. © 2024 The Authors. Published by American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The response of double-stranded DNA to external mechanical stress plays a central role in its interactions with the protein machinery in the cell. Modern atomistic force fields have been shown to provide highly accurate predictions for the fine structural features of the duplex. In contrast, and despite their pivotal function, less attention has been devoted to the accuracy of the prediction of the elastic parameters. Several reports have addressed the flexibility of double-stranded DNA via all-atom molecular dynamics, yet the collected information is insufficient to have a clear understanding of the relative performance of the various force fields. In this work, we fill this gap by performing a systematic study in which several systems, characterized by different sequence contexts, are simulated with the most popular force fields within the AMBER family, bcs1 and OL15, as well as with CHARMM36. Analysis of our results, together with their comparison with previous work focused on bsc0, allows us to unveil the differences in the predicted rigidity between the newest force fields and suggests a roadmap to test their performance against experiments. In the case of the stretch modulus, we reconcile these differences, showing that a single mapping between sequence-dependent conformation and elasticity via the crookedness parameter captures simultaneously the results of all force fields, supporting the key role of crookedness in the mechanical response of double-stranded DNA. © 2024 The Authors. Published by American Chemical Society.
28.
Bonanno, C.; D'Angelo, F.; D'Elia, M.; Maio, L.; Naviglio, M.
Sphaleron rate from lattice QCD Journal Article
In: Nuclear and Particle Physics Proceedings, vol. 343, pp. 113–119, 2024.
@article{bonanno_sphaleron_2024,
title = {Sphaleron rate from lattice QCD},
author = {C. Bonanno and F. D'Angelo and M. D'Elia and L. Maio and M. Naviglio},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85173150177&doi=10.1016%2fj.nuclphysbps.2023.09.019&partnerID=40&md5=daaf95061faba28ec4ee00a94f121b2b},
doi = {10.1016/j.nuclphysbps.2023.09.019},
year = {2024},
date = {2024-01-01},
journal = {Nuclear and Particle Physics Proceedings},
volume = {343},
pages = {113–119},
abstract = {We compute the sphaleron rate on the lattice from the inversion of the Euclidean time correlators of the topological charge density, performing also controlled continuum and zero-smoothing extrapolations. The correlator inversion is performed by means of a recently-proposed modification of the Backus-Gilbert method. © 2023 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We compute the sphaleron rate on the lattice from the inversion of the Euclidean time correlators of the topological charge density, performing also controlled continuum and zero-smoothing extrapolations. The correlator inversion is performed by means of a recently-proposed modification of the Backus-Gilbert method. © 2023 Elsevier B.V.
29.
Grosso, G.; Pietka, B.; Antón-Solanas, C.; Ballarini, D.; Fainstein, A.
Polaritonics: introduction to feature issue Journal Article
In: Optical Materials Express, vol. 14, no. 1, pp. 155–156, 2024.
@article{grosso_polaritonics_2024,
title = {Polaritonics: introduction to feature issue},
author = {G. Grosso and B. Pietka and C. Antón-Solanas and D. Ballarini and A. Fainstein},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85182429033&doi=10.1364%2fOME.510619&partnerID=40&md5=36adfb685f385a23e4f302f9200fdd71},
doi = {10.1364/OME.510619},
year = {2024},
date = {2024-01-01},
journal = {Optical Materials Express},
volume = {14},
number = {1},
pages = {155–156},
abstract = {In the evolving landscape of modern science and technology, the field of polaritonics has emerged as a beacon of innovation and discovery. With its roots grounded in the coherent interplay of light and matter, polaritonics has pushed the boundaries of our understanding of many-body and quantum phenomena, and harnessed their potential for revolutionary applications. We are delighted to introduce this special issue, dedicated to exploring the cutting-edge of polaritonics research and its profound implications for various domains of science. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In the evolving landscape of modern science and technology, the field of polaritonics has emerged as a beacon of innovation and discovery. With its roots grounded in the coherent interplay of light and matter, polaritonics has pushed the boundaries of our understanding of many-body and quantum phenomena, and harnessed their potential for revolutionary applications. We are delighted to introduce this special issue, dedicated to exploring the cutting-edge of polaritonics research and its profound implications for various domains of science. © 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.
30.
Coloma, P.; Martín-Albo, J.; Urrea, S.
Discovering long-lived particles at DUNE Journal Article
In: Physical Review D, vol. 109, no. 3, 2024.
@article{coloma_discovering_2024,
title = {Discovering long-lived particles at DUNE},
author = {P. Coloma and J. Martín-Albo and S. Urrea},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85185371478&doi=10.1103%2fPhysRevD.109.035013&partnerID=40&md5=884206d0f372a5dec924d24205e3957c},
doi = {10.1103/PhysRevD.109.035013},
year = {2024},
date = {2024-01-01},
journal = {Physical Review D},
volume = {109},
number = {3},
abstract = {Long-lived particles (LLPs) arise in many theories beyond the Standard Model. These may be copiously produced from meson decays (or through their mixing with the LLPs) at neutrino facilities and leave a visible decay signal in nearby neutrino detectors. We compute the expected sensitivity of the DUNE liquid argon (LAr) and gaseous argon near detectors (NDs) to light LLP decays. In doing so, we determine the expected backgrounds for both detectors, which have been largely overlooked in the literature, taking into account their angular and energy resolution. We show that searches for LLP decays into muon pairs, or into three pions, would be extremely clean. Conversely, decays into two photons would be affected by large backgrounds from neutrino interactions for both near detectors; finally, the reduced signal efficiency for e+e- pairs leads to a reduced sensitivity for ND-LAr. Our results are first presented in a model-independent way, as a function of the mass of the new state and its lifetime. We also provide detailed calculations for several phenomenological models with axionlike particles (coupled to gluons, electroweak bosons, or quark currents). Some of our results may also be of interest for other neutrino facilities using a similar detector technology (e.g., MicroBooNE, SBND, ICARUS, or the T2K near detector). © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Long-lived particles (LLPs) arise in many theories beyond the Standard Model. These may be copiously produced from meson decays (or through their mixing with the LLPs) at neutrino facilities and leave a visible decay signal in nearby neutrino detectors. We compute the expected sensitivity of the DUNE liquid argon (LAr) and gaseous argon near detectors (NDs) to light LLP decays. In doing so, we determine the expected backgrounds for both detectors, which have been largely overlooked in the literature, taking into account their angular and energy resolution. We show that searches for LLP decays into muon pairs, or into three pions, would be extremely clean. Conversely, decays into two photons would be affected by large backgrounds from neutrino interactions for both near detectors; finally, the reduced signal efficiency for e+e- pairs leads to a reduced sensitivity for ND-LAr. Our results are first presented in a model-independent way, as a function of the mass of the new state and its lifetime. We also provide detailed calculations for several phenomenological models with axionlike particles (coupled to gluons, electroweak bosons, or quark currents). Some of our results may also be of interest for other neutrino facilities using a similar detector technology (e.g., MicroBooNE, SBND, ICARUS, or the T2K near detector). © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
31.
Ayani, C. G.; Bosnar, M.; Calleja, F.; Solé, A. P.; Stetsovych, O.; Ibarburu, I. M.; Rebanal, C.; Garnica, M.; Miranda, R.; Otrokov, M. M.; Ondráček, M.; Jelínek, P.; Arnau, A.; de Parga, A. L. Vázquez
Unveiling the Interlayer Interaction in a 1H/1T TaS2 van der Waals Heterostructure Journal Article
In: Nano Letters, 2024.
@article{ayani_unveiling_2024,
title = {Unveiling the Interlayer Interaction in a 1H/1T TaS2 van der Waals Heterostructure},
author = {C. G. Ayani and M. Bosnar and F. Calleja and A. P. Solé and O. Stetsovych and I. M. Ibarburu and C. Rebanal and M. Garnica and R. Miranda and M. M. Otrokov and M. Ondráček and P. Jelínek and A. Arnau and A. L. Vázquez de Parga},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85199276202&doi=10.1021%2facs.nanolett.4c02068&partnerID=40&md5=d6ab2eeff7e98bf9ec3998361cebd426},
doi = {10.1021/acs.nanolett.4c02068},
year = {2024},
date = {2024-01-01},
journal = {Nano Letters},
abstract = {This study delves into the intriguing properties of the 1H/1T-TaS2 van der Waals heterostructure, focusing on the transparency of the 1H layer to the charge density wave of the underlying 1T layer. Despite the sizable interlayer separation and metallic nature of the 1H layer, positive bias voltages result in a pronounced superposition of the 1T charge density wave structure on the 1H layer. The conventional explanation relying on tunneling effects proves insufficient. Through a comprehensive investigation combining low-temperature scanning tunneling microscopy, scanning tunneling spectroscopy, non-contact atomic force microscopy, and first-principles calculations, we propose an alternative interpretation. The transparency effect arises from a weak yet substantial electronic coupling between the 1H and 1T layers, challenging prior understanding of the system. Our results highlight the critical role played by interlayer electronic interactions in van der Waals heterostructures to determine the final ground states of the systems. © 2024 American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This study delves into the intriguing properties of the 1H/1T-TaS2 van der Waals heterostructure, focusing on the transparency of the 1H layer to the charge density wave of the underlying 1T layer. Despite the sizable interlayer separation and metallic nature of the 1H layer, positive bias voltages result in a pronounced superposition of the 1T charge density wave structure on the 1H layer. The conventional explanation relying on tunneling effects proves insufficient. Through a comprehensive investigation combining low-temperature scanning tunneling microscopy, scanning tunneling spectroscopy, non-contact atomic force microscopy, and first-principles calculations, we propose an alternative interpretation. The transparency effect arises from a weak yet substantial electronic coupling between the 1H and 1T layers, challenging prior understanding of the system. Our results highlight the critical role played by interlayer electronic interactions in van der Waals heterostructures to determine the final ground states of the systems. © 2024 American Chemical Society.
32.
Ayani, C. G.; Pisarra, M.; Ibarburu, I. M.; Garnica, M.; Miranda, R.; Calleja, F.; Martín, F.; de Parga, A. L. Vázquez
Probing the Phase Transition to a Coherent 2D Kondo Lattice Journal Article
In: Small, vol. 20, no. 8, 2024.
@article{ayani_probing_2024,
title = {Probing the Phase Transition to a Coherent 2D Kondo Lattice},
author = {C. G. Ayani and M. Pisarra and I. M. Ibarburu and M. Garnica and R. Miranda and F. Calleja and F. Martín and A. L. Vázquez de Parga},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85174736445&doi=10.1002%2fsmll.202303275&partnerID=40&md5=dc1dffa367c7a6adb6025d5d6ceefb3b},
doi = {10.1002/smll.202303275},
year = {2024},
date = {2024-01-01},
journal = {Small},
volume = {20},
number = {8},
abstract = {Kondo lattices are systems with unusual electronic properties that stem from strong electron correlation, typically studied in intermetallic 3D compounds containing lanthanides or actinides. Lowering the dimensionality of the system enhances the role of electron correlations providing a new tuning knob for the search of novel properties in strongly correlated quantum matter. The realization of a 2D Kondo lattice by stacking a single-layer Mott insulator on a metallic surface is reported. The temperature of the system is steadily lowered and by using high-resolution scanning tunneling spectroscopy, the phase transition leading to the Kondo lattice is followed. Above 27 K the interaction between the Mott insulator and the metal is negligible and both keep their original electronic properties intact. Below 27 K the Kondo screening of the localized electrons in the Mott insulator begins and below 11 K the formation of a coherent quantum electronic state extended to the entire sample, i.e., the Kondo lattice, takes place. By means of density functional theory, the electronic properties of the system and its evolution with temperature are explained. The findings contribute to the exploration of unconventional states in 2D correlated materials. © 2023 The Authors. Small published by Wiley-VCH GmbH.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kondo lattices are systems with unusual electronic properties that stem from strong electron correlation, typically studied in intermetallic 3D compounds containing lanthanides or actinides. Lowering the dimensionality of the system enhances the role of electron correlations providing a new tuning knob for the search of novel properties in strongly correlated quantum matter. The realization of a 2D Kondo lattice by stacking a single-layer Mott insulator on a metallic surface is reported. The temperature of the system is steadily lowered and by using high-resolution scanning tunneling spectroscopy, the phase transition leading to the Kondo lattice is followed. Above 27 K the interaction between the Mott insulator and the metal is negligible and both keep their original electronic properties intact. Below 27 K the Kondo screening of the localized electrons in the Mott insulator begins and below 11 K the formation of a coherent quantum electronic state extended to the entire sample, i.e., the Kondo lattice, takes place. By means of density functional theory, the electronic properties of the system and its evolution with temperature are explained. The findings contribute to the exploration of unconventional states in 2D correlated materials. © 2023 The Authors. Small published by Wiley-VCH GmbH.
33.
Baran, L.; Llombart, P.; Noya, E. G.; MacDowell, L. G.
Is it possible to overheat ice? The activated melting of TIP4P/Ice at solid–vapour coexistence. Journal Article
In: Molecular Physics, vol. 122, no. 21-22, 2024.
@article{baran_is_2024,
title = {Is it possible to overheat ice? The activated melting of TIP4P/Ice at solid–vapour coexistence.},
author = {L. Baran and P. Llombart and E. G. Noya and L. G. MacDowell},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85201070057&doi=10.1080%2f00268976.2024.2388800&partnerID=40&md5=2c5dc4ff4f39049c814db7ff0d4f5652},
doi = {10.1080/00268976.2024.2388800},
year = {2024},
date = {2024-01-01},
journal = {Molecular Physics},
volume = {122},
number = {21-22},
abstract = {A widely accepted phenomenological rule states that solids with free surfaces cannot be overheated. In this work we discuss this statement critically under the light of the statistical thermodynamics of interfacial roughening transitions. Our results show that the basal face of ice as described by the TIP4P/Ice model can remain mechanically stable for more than one hundred nanoseconds when overheated by 1 K, and for several hundreds of nanoseconds at smaller overheating despite the presence of a significant quasi-liquid layer at the surface. Such time scales, which are often of little experimental significance, can become a concern for the determination of melting points by computer simulations using the direct coexistence method. In the light of this observation, we reinterpret computer simulations of ice premelting and show that current results for the TIP4P/Ice model all imply a scenario of incomplete surface melting. Using a thermodynamic integration path, we reassess our own estimates for the Laplace pressure difference between water and vapour. These calculations are used to measure the disjoining pressure of premelting liquid films and allow us to confirm a minimum of the interfacial free energy at finite premelting thickness of about one nanometer. © 2024 Informa UK Limited, trading as Taylor & Francis Group.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A widely accepted phenomenological rule states that solids with free surfaces cannot be overheated. In this work we discuss this statement critically under the light of the statistical thermodynamics of interfacial roughening transitions. Our results show that the basal face of ice as described by the TIP4P/Ice model can remain mechanically stable for more than one hundred nanoseconds when overheated by 1 K, and for several hundreds of nanoseconds at smaller overheating despite the presence of a significant quasi-liquid layer at the surface. Such time scales, which are often of little experimental significance, can become a concern for the determination of melting points by computer simulations using the direct coexistence method. In the light of this observation, we reinterpret computer simulations of ice premelting and show that current results for the TIP4P/Ice model all imply a scenario of incomplete surface melting. Using a thermodynamic integration path, we reassess our own estimates for the Laplace pressure difference between water and vapour. These calculations are used to measure the disjoining pressure of premelting liquid films and allow us to confirm a minimum of the interfacial free energy at finite premelting thickness of about one nanometer. © 2024 Informa UK Limited, trading as Taylor & Francis Group.
34.
Andrino-Gómez, A.; Moratalla, M.; Redondo-Cubero, A.; Gordillo, N.; Ramos, M. A.
Low-temperature electrical conductivity of ion-beamirradiated Bi-Sb films Journal Article
In: Fizika Nizkikh Temperatur, vol. 50, no. 5, pp. 427–433, 2024.
@article{andrino-gomez_low-temperature_2024-1,
title = {Low-temperature electrical conductivity of ion-beamirradiated Bi-Sb films},
author = {A. Andrino-Gómez and M. Moratalla and A. Redondo-Cubero and N. Gordillo and M. A. Ramos},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85192921590&partnerID=40&md5=53afb0a9fe2bd4237116344ccdad9079},
year = {2024},
date = {2024-01-01},
journal = {Fizika Nizkikh Temperatur},
volume = {50},
number = {5},
pages = {427–433},
abstract = {Bismuth-antimony alloys are among the most studied topological insulators and also have very promising thermoelectric properties. In addition, in the amorphous state they exhibit superconductivity with critical temperatures in the range 6.0–6.4 K. In this work, we have prepared and studied different polycrystalline films of Bi100– xSbx (x = 0, 5, 10, 15), and we have induced, through ion beam irradiation, significant damage in their internal structure with the aim of amorphizing the material. Specifically, we have irradiated Bi ions in the 10–30 MeV range, exploiting the capabilities of a 5 MV ion beam accelerator of tandem type. We have characterized the Bi–Sb films before and after irradiation from a morphological and structural point of view and measured their electrical resistivity from room temperature to near 2 K, to evaluate the influence of the preparation method and degree of disorder. We have found that the studied Bi–Sb system always behaves as a small energy gap semiconductor that follows the empirical Meyer–Neldel rule, which correlates the conductivity prefactor with the exponential value of the energy gap. © 2024 B.Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bismuth-antimony alloys are among the most studied topological insulators and also have very promising thermoelectric properties. In addition, in the amorphous state they exhibit superconductivity with critical temperatures in the range 6.0–6.4 K. In this work, we have prepared and studied different polycrystalline films of Bi100– xSbx (x = 0, 5, 10, 15), and we have induced, through ion beam irradiation, significant damage in their internal structure with the aim of amorphizing the material. Specifically, we have irradiated Bi ions in the 10–30 MeV range, exploiting the capabilities of a 5 MV ion beam accelerator of tandem type. We have characterized the Bi–Sb films before and after irradiation from a morphological and structural point of view and measured their electrical resistivity from room temperature to near 2 K, to evaluate the influence of the preparation method and degree of disorder. We have found that the studied Bi–Sb system always behaves as a small energy gap semiconductor that follows the empirical Meyer–Neldel rule, which correlates the conductivity prefactor with the exponential value of the energy gap. © 2024 B.Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine. All rights reserved.
35.
Acciai, M.; Tesser, L.; Eriksson, J.; Sánchez, R.; Whitney, R. S.; Splettstoesser, J.
Constraints between entropy production and its fluctuations in nonthermal engines Journal Article
In: Physical Review B, vol. 109, no. 7, 2024.
@article{acciai_constraints_2024,
title = {Constraints between entropy production and its fluctuations in nonthermal engines},
author = {M. Acciai and L. Tesser and J. Eriksson and R. Sánchez and R. S. Whitney and J. Splettstoesser},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85184658008&doi=10.1103%2fPhysRevB.109.075405&partnerID=40&md5=d21f9f49674d74d3b916acd1f7a9a1a7},
doi = {10.1103/PhysRevB.109.075405},
year = {2024},
date = {2024-01-01},
journal = {Physical Review B},
volume = {109},
number = {7},
abstract = {We analyze a mesoscopic conductor autonomously performing a thermodynamically useful task, such as cooling or producing electrical power, in a part of the system - the working substance - by exploiting another terminal or set of terminals - the resource - that contains a stationary nonthermal (nonequilibrium) distribution. Thanks to the nonthermal properties of the resource, on average no exchange of particles or energy with the working substance is required to fulfill the task. This resembles the action of a demon, as long as only average quantities are considered. Here, we go beyond a description based on average currents and investigate the role of fluctuations in such a system. We show that a minimum level of entropy fluctuations in the system is necessary, whenever one is exploiting a certain entropy production in the resource terminal to perform a useful task in the working substance. For concrete implementations of the demonic nonthermal engine in three- and four-terminal electronic conductors in the quantum Hall regime, we compare the resource fluctuations to the entropy production in the resource and to the useful engine output (produced power or cooling power). © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by "https://www.kb.se/samverkan-och-utveckling/oppen-tillgang-och-bibsamkonsortiet/bibsamkonsortiet.html"Bibsam.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We analyze a mesoscopic conductor autonomously performing a thermodynamically useful task, such as cooling or producing electrical power, in a part of the system - the working substance - by exploiting another terminal or set of terminals - the resource - that contains a stationary nonthermal (nonequilibrium) distribution. Thanks to the nonthermal properties of the resource, on average no exchange of particles or energy with the working substance is required to fulfill the task. This resembles the action of a demon, as long as only average quantities are considered. Here, we go beyond a description based on average currents and investigate the role of fluctuations in such a system. We show that a minimum level of entropy fluctuations in the system is necessary, whenever one is exploiting a certain entropy production in the resource terminal to perform a useful task in the working substance. For concrete implementations of the demonic nonthermal engine in three- and four-terminal electronic conductors in the quantum Hall regime, we compare the resource fluctuations to the entropy production in the resource and to the useful engine output (produced power or cooling power). © 2024 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by "https://www.kb.se/samverkan-och-utveckling/oppen-tillgang-och-bibsamkonsortiet/bibsamkonsortiet.html"Bibsam.
36.
Machín, A.; Morant, C.; Márquez, F.
Advancements and Challenges in Solid-State Battery Technology: An In-Depth Review of Solid Electrolytes and Anode Innovations Journal Article
In: Batteries, vol. 10, no. 1, 2024.
@article{machin_advancements_2024,
title = {Advancements and Challenges in Solid-State Battery Technology: An In-Depth Review of Solid Electrolytes and Anode Innovations},
author = {A. Machín and C. Morant and F. Márquez},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85183346837&doi=10.3390%2fbatteries10010029&partnerID=40&md5=73b8c1e5e7d31af6719207fd39f4b994},
doi = {10.3390/batteries10010029},
year = {2024},
date = {2024-01-01},
journal = {Batteries},
volume = {10},
number = {1},
abstract = {The primary goal of this review is to provide a comprehensive overview of the state-of-the-art in solid-state batteries (SSBs), with a focus on recent advancements in solid electrolytes and anodes. The paper begins with a background on the evolution from liquid electrolyte lithium-ion batteries to advanced SSBs, highlighting their enhanced safety and energy density. It addresses the increasing demand for efficient, safe energy storage in applications like electric vehicles and portable electronics. A major part of the paper analyzes solid electrolytes, key to SSB technology. It classifies solid electrolytes as polymer-based, oxide-based, and sulfide-based, discussing their distinct properties and application suitability. The review also covers advancements in anode materials for SSBs, exploring materials like lithium metal, silicon, and intermetallic compounds, focusing on their capacity, durability, and compatibility with solid electrolytes. It addresses challenges in integrating these anode materials, like the interface stability and lithium dendrite growth. This review includes a discussion on the latest analytical techniques, experimental studies, and computational models to understand and improve the anode–solid electrolyte interface. These are crucial for tackling interfacial resistance and ensuring SSBs’ long-term stability and efficiency. Concluding, the paper suggests future research and development directions, highlighting SSBs’ potential in revolutionizing energy storage technologies. This review serves as a vital resource for academics, researchers, and industry professionals in advanced battery technology development. It offers a detailed overview of materials and technologies shaping SSBs’ future, providing insights into current challenges and potential solutions in this rapidly evolving field. © 2024 by the authors.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The primary goal of this review is to provide a comprehensive overview of the state-of-the-art in solid-state batteries (SSBs), with a focus on recent advancements in solid electrolytes and anodes. The paper begins with a background on the evolution from liquid electrolyte lithium-ion batteries to advanced SSBs, highlighting their enhanced safety and energy density. It addresses the increasing demand for efficient, safe energy storage in applications like electric vehicles and portable electronics. A major part of the paper analyzes solid electrolytes, key to SSB technology. It classifies solid electrolytes as polymer-based, oxide-based, and sulfide-based, discussing their distinct properties and application suitability. The review also covers advancements in anode materials for SSBs, exploring materials like lithium metal, silicon, and intermetallic compounds, focusing on their capacity, durability, and compatibility with solid electrolytes. It addresses challenges in integrating these anode materials, like the interface stability and lithium dendrite growth. This review includes a discussion on the latest analytical techniques, experimental studies, and computational models to understand and improve the anode–solid electrolyte interface. These are crucial for tackling interfacial resistance and ensuring SSBs’ long-term stability and efficiency. Concluding, the paper suggests future research and development directions, highlighting SSBs’ potential in revolutionizing energy storage technologies. This review serves as a vital resource for academics, researchers, and industry professionals in advanced battery technology development. It offers a detailed overview of materials and technologies shaping SSBs’ future, providing insights into current challenges and potential solutions in this rapidly evolving field. © 2024 by the authors.
37.
Zhang, F.; Oiticica, P. R. A.; Abad-Arredondo, J.; Arai, M. S.; Oliveira, O. N.; Jaque, D.; Dominguez, A. I. Fernandez; Camargo, A. S. S.; Haro-González, P.
Brownian Motion Governs the Plasmonic Enhancement of Colloidal Upconverting Nanoparticles Journal Article
In: Nano Letters, vol. 24, no. 12, pp. 3785–3792, 2024.
@article{zhang_brownian_2024,
title = {Brownian Motion Governs the Plasmonic Enhancement of Colloidal Upconverting Nanoparticles},
author = {F. Zhang and P. R. A. Oiticica and J. Abad-Arredondo and M. S. Arai and O. N. Oliveira and D. Jaque and A. I. Fernandez Dominguez and A. S. S. Camargo and P. Haro-González},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85188050671&doi=10.1021%2facs.nanolett.4c00379&partnerID=40&md5=28d33eb227c50a857c30c86d87f4298a},
doi = {10.1021/acs.nanolett.4c00379},
year = {2024},
date = {2024-01-01},
journal = {Nano Letters},
volume = {24},
number = {12},
pages = {3785–3792},
abstract = {Upconverting nanoparticles are essential in modern photonics due to their ability to convert infrared light to visible light. Despite their significance, they exhibit limited brightness, a key drawback that can be addressed by combining them with plasmonic nanoparticles. Plasmon-enhanced upconversion has been widely demonstrated in dry environments, where upconverting nanoparticles are immobilized, but constitutes a challenge in liquid media where Brownian motion competes against immobilization. This study employs optical tweezers for the three-dimensional manipulation of an individual upconverting nanoparticle, enabling the exploration of plasmon-enhanced upconversion luminescence in water. Contrary to expectation, experiments reveal a long-range (micrometer scale) and moderate (20%) enhancement in upconversion luminescence due to the plasmonic resonances of gold nanostructures. Comparison between experiments and numerical simulations evidences the key role of Brownian motion. It is demonstrated how the three-dimensional Brownian fluctuations of the upconverting nanoparticle lead to an “average effect” that explains the magnitude and spatial extension of luminescence enhancement. © 2024 The Authors. Published by American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Upconverting nanoparticles are essential in modern photonics due to their ability to convert infrared light to visible light. Despite their significance, they exhibit limited brightness, a key drawback that can be addressed by combining them with plasmonic nanoparticles. Plasmon-enhanced upconversion has been widely demonstrated in dry environments, where upconverting nanoparticles are immobilized, but constitutes a challenge in liquid media where Brownian motion competes against immobilization. This study employs optical tweezers for the three-dimensional manipulation of an individual upconverting nanoparticle, enabling the exploration of plasmon-enhanced upconversion luminescence in water. Contrary to expectation, experiments reveal a long-range (micrometer scale) and moderate (20%) enhancement in upconversion luminescence due to the plasmonic resonances of gold nanostructures. Comparison between experiments and numerical simulations evidences the key role of Brownian motion. It is demonstrated how the three-dimensional Brownian fluctuations of the upconverting nanoparticle lead to an “average effect” that explains the magnitude and spatial extension of luminescence enhancement. © 2024 The Authors. Published by American Chemical Society.
38.
Yao, J.; Simón-Fuente, S.; Lopez-Peña, G.; Gómez-Pastor, S.; Guisan-Ceinos, S.; Marin, R.; Rodríguez, E. Martín; Jaque, D.; Sanz-Rodríguez, F.; Ribagorda, M.; Ortgies, D. H.
Multifunctional azo-BODIPY-functionalised upconversion nanoparticles as sensors of hypoxia in biological environments Journal Article
In: Journal of Materials Chemistry C, 2024.
@article{yao_multifunctional_2024,
title = {Multifunctional azo-BODIPY-functionalised upconversion nanoparticles as sensors of hypoxia in biological environments},
author = {J. Yao and S. Simón-Fuente and G. Lopez-Peña and S. Gómez-Pastor and S. Guisan-Ceinos and R. Marin and E. Martín Rodríguez and D. Jaque and F. Sanz-Rodríguez and M. Ribagorda and D. H. Ortgies},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211340489&doi=10.1039%2fd4tc03302g&partnerID=40&md5=8381ecee5ad7bc3ea78e4323896bc333},
doi = {10.1039/d4tc03302g},
year = {2024},
date = {2024-01-01},
journal = {Journal of Materials Chemistry C},
abstract = {In this work, a hypoxia-sensitive nanoprobe is developed by coating the surface of upconverting core/shell nanoparticles (NaGdF4: 2%Yb3+, 3%Nd3+, 0.2%Tm3+/NaYF4) with a non-fluorescent azo-dye based on a boron-dipyrromethene functionalized azo compound. Azo-dyes are able to quench fluorescence emissions due to their N 00000000 00000000 00000000 00000000 11111111 00000000 11111111 00000000 00000000 00000000 N azo bond, which results in the absorption of most visible emissions of the nanoparticles. However, in a biological environment suffering hypoxia, the azo bond is reduced, which allows the recovery of the nanoparticles’ upconversion emissions. Thereby a near-infrared excitable sensor with an azo-dye is created and for the first time not only enables excitation via NIR at biocompatible 808 nm but also continuous imaging and tracking of the probe in the infrared due to NIR-emissions enabled by the dopant combination since quenching only occurs in the visible. These multifunctional (imaging and sensing) nanoparticles are characterized, their behaviour in reductive and hypoxic environments is determined and the detection of reducing conditions in a hypoxic environment is demonstrated in cells. © 2024 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this work, a hypoxia-sensitive nanoprobe is developed by coating the surface of upconverting core/shell nanoparticles (NaGdF4: 2%Yb3+, 3%Nd3+, 0.2%Tm3+/NaYF4) with a non-fluorescent azo-dye based on a boron-dipyrromethene functionalized azo compound. Azo-dyes are able to quench fluorescence emissions due to their N 00000000 00000000 00000000 00000000 11111111 00000000 11111111 00000000 00000000 00000000 N azo bond, which results in the absorption of most visible emissions of the nanoparticles. However, in a biological environment suffering hypoxia, the azo bond is reduced, which allows the recovery of the nanoparticles’ upconversion emissions. Thereby a near-infrared excitable sensor with an azo-dye is created and for the first time not only enables excitation via NIR at biocompatible 808 nm but also continuous imaging and tracking of the probe in the infrared due to NIR-emissions enabled by the dopant combination since quenching only occurs in the visible. These multifunctional (imaging and sensing) nanoparticles are characterized, their behaviour in reductive and hypoxic environments is determined and the detection of reducing conditions in a hypoxic environment is demonstrated in cells. © 2024 The Royal Society of Chemistry.
39.
Hernández-Pinilla, D.; Nogal, N.; Sánchez-García, L.; Carretero-Palacios, S.; Lima, K. Oliveira; Ferrier, A.; Goldner, P.; Bausá, L. E.; Ramírez, M. O.
Coupling Nd3+:Y2O3 fluorescent submicron particles to linear plasmonic chains Journal Article
In: Journal of Luminescence, vol. 265, 2024.
@article{hernandez-pinilla_coupling_2024,
title = {Coupling Nd3+:Y2O3 fluorescent submicron particles to linear plasmonic chains},
author = {D. Hernández-Pinilla and N. Nogal and L. Sánchez-García and S. Carretero-Palacios and K. Oliveira Lima and A. Ferrier and P. Goldner and L. E. Bausá and M. O. Ramírez},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85172397532&doi=10.1016%2fj.jlumin.2023.120220&partnerID=40&md5=0c513c9ec6ae054c69e526d0433e3f17},
doi = {10.1016/j.jlumin.2023.120220},
year = {2024},
date = {2024-01-01},
journal = {Journal of Luminescence},
volume = {265},
abstract = {We report on the fabrication and optical characterization of a new hybrid material consisting of Nd3+ doped Y2O3 submicron particles associated with linear chains of plasmonic nanostructures. By drop-casting deposition, single Nd3+ doped Y2O3 polycrystalline particles are dispersed and located in the vicinities of plasmonic chains of silver nanoparticles formed on the surface a LiNbO3 substrate. The interaction between the plasmonic modes of the chain with the fluorescent yttria submicron particles is analyzed by micro-luminescence experiments. Orthogonal polarization configurations of the excitation radiation, namely, perpendicular and parallel to plasmonic chain axis, are employed to study the effect of the longitudinal and transverse chain plasmonic modes on the luminescence of the particles. A remarkable dependence of the emission intensity of the Nd3+:Y2O3 submicron particles on the excitation polarization is observed, showing the capability of plasmonic chains to modulate the emission of fluorescent submicron particles in contact with the chain. Numerical simulations evidence a different distribution of the excitation radiation field within the Nd3+:Y2O3 particle depending on the type of excited plasmonic mode, longitudinal or transversal, of the chain, and hence, the ability of plasmonic chains for controlling the emission of Rare Earth doped submicron particles. © 2023 The Authors},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We report on the fabrication and optical characterization of a new hybrid material consisting of Nd3+ doped Y2O3 submicron particles associated with linear chains of plasmonic nanostructures. By drop-casting deposition, single Nd3+ doped Y2O3 polycrystalline particles are dispersed and located in the vicinities of plasmonic chains of silver nanoparticles formed on the surface a LiNbO3 substrate. The interaction between the plasmonic modes of the chain with the fluorescent yttria submicron particles is analyzed by micro-luminescence experiments. Orthogonal polarization configurations of the excitation radiation, namely, perpendicular and parallel to plasmonic chain axis, are employed to study the effect of the longitudinal and transverse chain plasmonic modes on the luminescence of the particles. A remarkable dependence of the emission intensity of the Nd3+:Y2O3 submicron particles on the excitation polarization is observed, showing the capability of plasmonic chains to modulate the emission of fluorescent submicron particles in contact with the chain. Numerical simulations evidence a different distribution of the excitation radiation field within the Nd3+:Y2O3 particle depending on the type of excited plasmonic mode, longitudinal or transversal, of the chain, and hence, the ability of plasmonic chains for controlling the emission of Rare Earth doped submicron particles. © 2023 The Authors
40.
Shuhaib, J. H. Al; Ferrer, I. J.; Ares, J. R.; Cianci, S.; Tuzi, F.; Blundo, E.; Polimeni, A.; Benayas, A.; Marin, R.; Leardini, F.
Sensitized near-infrared lanthanide emission in chalcogenide perovskites Journal Article
In: Journal of Materials Chemistry C, 2024.
@article{al_shuhaib_sensitized_2024,
title = {Sensitized near-infrared lanthanide emission in chalcogenide perovskites},
author = {J. H. Al Shuhaib and I. J. Ferrer and J. R. Ares and S. Cianci and F. Tuzi and E. Blundo and A. Polimeni and A. Benayas and R. Marin and F. Leardini},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85211058550&doi=10.1039%2fd4tc04446k&partnerID=40&md5=b6c31bad5e6e81f1c52678b41c65701b},
doi = {10.1039/d4tc04446k},
year = {2024},
date = {2024-01-01},
journal = {Journal of Materials Chemistry C},
abstract = {Semiconductor materials capable of hosting luminescent lanthanide ions (Ln3+) and sensitize their emission are scarce. Halide perovskites are prime systems for this purpose, yet they often feature toxic elements (e.g., lead) in their composition and have reduced stability. The discovery of alternative semiconductors that feature host-to-Ln3+ energy transfer mechanisms - while being more stable and environmentally benign - would thus broaden the applicability of this class of luminescent materials. Herein, we report near-infrared (NIR) emitting phosphors made of BaZrS3 chalcogenide perovskite doped with Ln3+ ions (Ln = Yb, Er, Nd). We chose BaZrS3 because it features (i) crystallographic sites that can accommodate Ln3+ ions, (ii) high light absorption coefficient in the visible, and (iii) stability. The phosphors were prepared via sulfurization of Ln3+-doped BaZrO3 microparticles obtained by a microwave-assisted procedure. The so-obtained Ln3+-doped BaZrS3 display low-temperature NIR emission characteristic of each Ln3+ ion when exciting the matrix. Following photoluminescence studies on doped and undoped BaZrS3 as a function of temperature, we propose an energy level scheme that explains the rich NIR photoluminescence displayed by these phosphors. The obtained results pave the way for the optimization of Ln3+-doped BaZrS3 for optical applications and are expected to spur the study of other ternary chalcogenides sensitization of Ln3+ luminescence. © 2025 The Royal Society of Chemistry.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Semiconductor materials capable of hosting luminescent lanthanide ions (Ln3+) and sensitize their emission are scarce. Halide perovskites are prime systems for this purpose, yet they often feature toxic elements (e.g., lead) in their composition and have reduced stability. The discovery of alternative semiconductors that feature host-to-Ln3+ energy transfer mechanisms - while being more stable and environmentally benign - would thus broaden the applicability of this class of luminescent materials. Herein, we report near-infrared (NIR) emitting phosphors made of BaZrS3 chalcogenide perovskite doped with Ln3+ ions (Ln = Yb, Er, Nd). We chose BaZrS3 because it features (i) crystallographic sites that can accommodate Ln3+ ions, (ii) high light absorption coefficient in the visible, and (iii) stability. The phosphors were prepared via sulfurization of Ln3+-doped BaZrO3 microparticles obtained by a microwave-assisted procedure. The so-obtained Ln3+-doped BaZrS3 display low-temperature NIR emission characteristic of each Ln3+ ion when exciting the matrix. Following photoluminescence studies on doped and undoped BaZrS3 as a function of temperature, we propose an energy level scheme that explains the rich NIR photoluminescence displayed by these phosphors. The obtained results pave the way for the optimization of Ln3+-doped BaZrS3 for optical applications and are expected to spur the study of other ternary chalcogenides sensitization of Ln3+ luminescence. © 2025 The Royal Society of Chemistry.