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Tsay CY, Chen ST, Tsai HM. Tailoring of the Structural, Optical, and Electrical Characteristics of Sol-Gel-Derived Magnesium-Zinc-Oxide Wide-Bandgap Semiconductor Thin Films via Gallium Doping. Materials (Basel) 2023; 16:6389. [PMID: 37834526 PMCID: PMC10573917 DOI: 10.3390/ma16196389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/16/2023] [Accepted: 09/19/2023] [Indexed: 10/15/2023]
Abstract
The Ga-doped Mg0.2Zn0.8O (GMZO) transparent semiconductor thin films were prepared using the sol-gel and spin-coating deposition technique. Changes in the microstructural features, optical parameters, and electrical characteristics of sol-gel-synthesized Mg0.2Zn0.8O (MZO) thin films affected by the amount of Ga dopants (0-5 at%) were studied. The results of grazing incidence X-ray diffraction (GIXRD) examination showed that all as-prepared MZO-based thin films had a wurtzite-type structure and hexagonal phase, and the incorporation of Ga ions into the MZO nanocrystals refined the microstructure and reduced the average crystallite size and flatness of surface roughness. Each glass/oxide thin film sample exhibited a higher average transmittance than 91.5% and a lower average reflectance than 9.1% in the visible range spectrum. Experimental results revealed that the optical bandgap energy of the GMZO thin films was slightly higher than that of the MZO thin film; the Urbach energy became wider with increasing Ga doping level. It was found that the 2 at% and 3 at% Ga-doped MZO thin films had better electrical properties than the undoped and 5 at% Ga-doped MZO thin films.
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Affiliation(s)
- Chien-Yie Tsay
- Department of Materials Science and Engineering, Feng Chia University, Taichung 40724, Taiwan; (S.-T.C.); (H.-M.T.)
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Hamraoui K, Torres-Vera VA, Zabala Gutierrez I, Casillas-Rubio A, Alqudwa Fattouh M, Benayas A, Marin R, Natile MM, Manso Silvan M, Rubio-Zuazo J, Jaque D, Melle S, Calderón OG, Rubio-Retama J. Exploring the Origin of the Thermal Sensitivity of Near-Infrared-II Emitting Rare Earth Nanoparticles. ACS Appl Mater Interfaces 2023. [PMID: 37390496 DOI: 10.1021/acsami.3c04125] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/02/2023]
Abstract
Rare-earth doped nanoparticles (RENPs) are attracting increasing interest in materials science due to their optical, magnetic, and chemical properties. RENPs can emit and absorb radiation in the second biological window (NIR-II, 1000-1400 nm) making them ideal optical probes for photoluminescence (PL) in vivo imaging. Their narrow emission bands and long PL lifetimes enable autofluorescence-free multiplexed imaging. Furthermore, the strong temperature dependence of the PL properties of some of these RENPs makes remote thermal imaging possible. This is the case of neodymium and ytterbium co-doped NPs that have been used as thermal reporters for in vivo diagnosis of, for instance, inflammatory processes. However, the lack of knowledge about how the chemical composition and architecture of these NPs influence their thermal sensitivity impedes further optimization. To shed light on this, we have systematically studied their emission intensity, PL decay time curves, absolute PL quantum yield, and thermal sensitivity as a function of the core chemical composition and size, active-shell, and outer-inert-shell thicknesses. The results revealed the crucial contribution of each of these factors in optimizing the NP thermal sensitivity. An optimal active shell thickness of around 2 nm and an outer inert shell of 3.5 nm maximize the PL lifetime and the thermal response of the NPs due to the competition between the temperature-dependent back energy transfer, the surface quenching effects, and the confinement of active ions in a thin layer. These findings pave the way for a rational design of RENPs with optimal thermal sensitivity.
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Affiliation(s)
- Khouloud Hamraoui
- Department of Chemistry in Pharmaceutical Sciences, Complutense University of Madrid, E-28040 Madrid, Spain
| | - Vivian Andrea Torres-Vera
- Department of Chemistry in Pharmaceutical Sciences, Complutense University of Madrid, E-28040 Madrid, Spain
| | - Irene Zabala Gutierrez
- Department of Chemistry in Pharmaceutical Sciences, Complutense University of Madrid, E-28040 Madrid, Spain
| | | | - Mohammed Alqudwa Fattouh
- Department of Chemistry in Pharmaceutical Sciences, Complutense University of Madrid, E-28040 Madrid, Spain
| | - Antonio Benayas
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034 Madrid, Spain
- Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Riccardo Marin
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034 Madrid, Spain
- Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Marta Maria Natile
- Dipartimento di Scienze Chimiche, Università di Padova, 35131 Padova, Padua, Italy
- Istituto di Chimica della Materia Condensata e Tecnologie per l'Energia (ICMATE), Consiglio Nazionale delle Ricerche (CNR), 35131 Padova, Padua, Italy
| | - Miguel Manso Silvan
- Departamento de Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Juan Rubio-Zuazo
- Spanish CRG BM25-SpLine Beamline at the ESRF, 38043 Grenoble, France
- Instituto de Ciencias de los Materiales de Madrid-Consejo Superior de Investigaciones Científicas, Cantoblanco, 28049 Madrid, Spain
| | - Daniel Jaque
- Nanobiology Group, Instituto Ramón y Cajal de Investigación Sanitaria, IRYCIS, 28034 Madrid, Spain
- Departamento de Física de Materiales, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Sonia Melle
- Department of Optics, Complutense University of Madrid, E-28037 Madrid, Spain
| | - Oscar G Calderón
- Department of Optics, Complutense University of Madrid, E-28037 Madrid, Spain
| | - Jorge Rubio-Retama
- Department of Chemistry in Pharmaceutical Sciences, Complutense University of Madrid, E-28040 Madrid, Spain
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Seo JS, Liu H, Cho YH, Jung WH, Kim S, Ahn DJ. Triple-Peak Photoluminescence of DNA-Hybrid Alq3 Crystals Emitting a Depressed Single Peak upon Bio-Recognition. ACS Appl Mater Interfaces 2023. [PMID: 37286381 DOI: 10.1021/acsami.2c21946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The green organic semiconductor, tris-(8-hydroxyquinoline)aluminum (Alq3), was hybridized with DNA growing in the shape of hexagonal prismatic crystals. In this study, we applied hydrodynamic flow to the fabrication of Alq3 crystals doped with DNA molecules. The hydrodynamic flow in the Taylor-Couette reactor induced nanoscale pores in the Alq3 crystals, especially at the side part of the particles. The particles exhibited distinctly different photoluminescence emissions divided into three parts compared to common Alq3-DNA hybrid crystals. We named this particle a "three-photonic-unit". After treatment with complementary target DNA, the three-photonic-unit Alq3 particles doped with DNAs were found to emit depressed luminescence from side parts of the particles. This novel phenomenon would expand the technological value of these hybrid crystals with divided photoluminescence emissions toward a wider range of bio-photonic applications.
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Affiliation(s)
- Jin Soo Seo
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Hanzhe Liu
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yong Ho Cho
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Woo Hyuk Jung
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Seokho Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Dong June Ahn
- Department of Chemical and Biological Engineering, Korea University, Seoul 02841, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Republic of Korea
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Xin W, Wang J, Xu B, Wu J, Wang J, Ren Z, Cai C, Xue C, Li J, Wang X. Construction of highly efficient carbon dots-based polymer photonic luminescent solar concentrators with sandwich structure. Nanotechnology 2022; 33:305601. [PMID: 35395655 DOI: 10.1088/1361-6528/ac659d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
The enhancement of photoluminescence (PL) emission and waveguide play a key role in improving the optical efficiency of luminescent solar concentrators (LSCs). In this work, to boosting PL emission and waveguide simultaneously, one photonic crystal (PC) structure (crystalline colloid arrays (CCAs)) was introduced into carbon dots (CDs)-based polymer LSCs. A sandwich-structured CDs-based polymer photonic LSC, comprising glass/CDs-based polymer PC film/glass, was created. First, CDs-based colloidal crystal suspensions were prepared by co-assembly of monodispersed p(MMA-NIPAm) colloids and multicolor-emitting CDs in HEMA monomer induced by the evaporation-driven assembly. The obtained suspensions not only had uniform PL and structural colors, but showed enhanced PL emission. Second, the above suspensions were sandwiched between two glass sheets and finally a photonic polymer LSC with sandwiched structure (25 × 25 × 1.8 mm3) were formed via one-step photopolymerization technique. Remarkably, the optimal CDs-based polymer photonic LSCs with sandwiched structure not only had high transparence at visible range (>60%), but exhibited PL emission enhancement (at least 2 times). Furthermore, the maximum external optical efficiency (ηopt) of 5.84% could be achieved based on yellow-emitting CDs-based polymer photonic LSC. The high external optical efficiency was mainly attributed to the PL emission enhancement and good PC waveguide.
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Affiliation(s)
- Wei Xin
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Jianying Wang
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Bing Xu
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Jun Wu
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Jun Wang
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Zhanpeng Ren
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Chen Cai
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Chenglong Xue
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Jinhua Li
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
| | - Xianbao Wang
- Key Laboratory for the Green Preparation and Application of Functional Materials, Ministry of Education, Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Hubei Key Laboratory of Polymer Materials, School of Materials Science and Engineering, Hubei University, Wuhan 430062, People's Republic of China
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Mandal S, Jain N, Pandey MK, Sreejakumari SS, Shukla P, Chanda A, Som S, Das S, Singh J. Ultra-bright emission from Sr doped TiO 2 nanoparticles through r-GO conjugation. R Soc Open Sci 2019; 6:190100. [PMID: 31032059 PMCID: PMC6458360 DOI: 10.1098/rsos.190100] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 02/25/2019] [Indexed: 05/28/2023]
Abstract
Graphene and semiconductor nanocomposite garnered much interest in nanoscience and nanotechnology. In this research, TiO2, TiO2: Sr and TiO2: Sr/r-GO (reduced graphene oxide) nanocomposites have been successfully synthesized via a wet chemical synthesis method. The microscopic studies confirmed the formation of graphene sheets which looked like a paper which could easily wrap over the bacterial surface killing them. The optical band gap of these nanocomposites is determined by UV-visible absorption spectra which inferred that optical band gap decreases with Sr2+ incorporation and r-GO attachment. Furthermore, photoluminescence (PL) study revealed that the intensity of emission is prominent for TiO2: Sr/r-GO. The enhancement in PL intensity with r-GO is due to creation of more oxygen vacancies and defects which generally capture the photoinduced carriers inhibiting recombination rate of free carriers promoting the photocatalytic reactions.
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Affiliation(s)
- Sanhita Mandal
- Department of Physics, Dr. Harisingh Gour Central University, Sagar, Madhya Pradesh 47003, India
| | - Neha Jain
- Department of Physics, Dr. Harisingh Gour Central University, Sagar, Madhya Pradesh 47003, India
| | - Mukesh Kumar Pandey
- Department of Physics, National Taiwan University, Taipei 10617, Taiwan, Republic of China
| | - S. S. Sreejakumari
- Materials Science and Technology Division, CSIR – National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India
| | - Prashant Shukla
- Department of Physics, Dr. Harisingh Gour Central University, Sagar, Madhya Pradesh 47003, India
| | - Anupama Chanda
- Department of Physics, Dr. Harisingh Gour Central University, Sagar, Madhya Pradesh 47003, India
| | - Sudipta Som
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan, Republic of China
| | - Subrata Das
- Materials Science and Technology Division, CSIR – National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India
| | - Jai Singh
- Department of Physics, Dr. Harisingh Gour Central University, Sagar, Madhya Pradesh 47003, India
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Yang Z, Zhang Y, Liu J, Ai J, Lai S, Zhao Z, Ye B, Ruan Y, Guo T, Yu X, Chen G, Lin Y, Xu S. Ultrastable Quantum Dot Composite Films under Severe Environments. ACS Appl Mater Interfaces 2018; 10:15880-15887. [PMID: 29652475 DOI: 10.1021/acsami.8b02790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Semiconductor quantum dots (QDs) have attracted extensive attention because of their remarkable optical and electrical characteristics. However, the practical application of QDs and further the QD composite films have greatly been hindered mainly owing to their essential drawbacks of extreme unstability under oxygen and water environments. Herein, one simple method has been employed to enhance enormously the stability of Cd xZn1- xSe yS1- y QD composite films by a combination of Cd xZn1- xSe yS1- y QDs and poly(vinylidene) fluoride (PVDF), which is characteristic of closely arranged molecular chains and strong hydrogen bonds. There are many particular advantages in using QD/PVDF composite films such as easy processing, low cost, large-area fabrication, and especially extreme stability even in the boiling water for more than 240 min. By employing K2SiF6:Mn4+ as a red phosphor, a prototype white light-emitting diode (WLED) with color coordinates of (0.3307, 0.3387), Tc of 5568 K, and color gamut 112.1NTSC(1931)% at 20 mA has been fabricated, and there is little variation under different excitation currents, indicating that the QD/PVDF composite films fabricated by this simple blade-coating process make them ideal candidates for liquid-crystal display backlight utilization via assembling a WLED on a large scale owing to its ultrahigh stability under severe environments.
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Affiliation(s)
- Zunxian Yang
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Yuxiang Zhang
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Jiahui Liu
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Jingwei Ai
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Shouqiang Lai
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Zhiwei Zhao
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Bingqing Ye
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Yushuai Ruan
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Tailiang Guo
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Xuebin Yu
- Department of Materials Science , Fudan University , Shanghai 200433 , P. R. China
| | - Gengxu Chen
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Yuanyuan Lin
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
| | - Sheng Xu
- National & Local United Engineering Laboratory of Flat Panel Display Technology , Fuzhou University , Fuzhou 350116 , P. R. China
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Ramiro-Manzano F, Fenollosa R, Xifré-Pérez E, Garín M, Meseguer F. Porous silicon microcavities: synthesis, characterization, and application to photonic barcode devices. Nanoscale Res Lett 2012; 7:497. [PMID: 22943136 PMCID: PMC3499175 DOI: 10.1186/1556-276x-7-497] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Accepted: 06/18/2012] [Indexed: 06/01/2023]
Abstract
We have recently developed a new type of porous silicon we name as porous silicon colloids. They consist of almost perfect spherical silicon nanoparticles with a very smooth surface, able to scatter (and also trap) light very efficiently in a large-span frequency range. Porous silicon colloids have unique properties because of the following: (a) they behave as optical microcavities with a high refractive index, and (b) the intrinsic photoluminescence (PL) emission is coupled to the optical modes of the microcavity resulting in a unique luminescence spectrum profile. The PL spectrum constitutes an optical fingerprint identifying each particle, with application for biosensing.In this paper, we review the synthesis of silicon colloids for developing porous nanoparticles. We also report on the optical properties with special emphasis in the PL emission of porous silicon microcavities. Finally, we present the photonic barcode concept.
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Affiliation(s)
- Fernando Ramiro-Manzano
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Roberto Fenollosa
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Elisabet Xifré-Pérez
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Moises Garín
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
| | - Francisco Meseguer
- Centro de Tecnologías Físicas, Unidad Asociada ICMM/CSIC-UPV, Universidad Politécnica de Valencia, Av. Los Naranjos s/n, Valencia, 46022, Spain
- Instituto de Ciencia de Materiales de Madrid CSIC, Madrid, 28049, Spain
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