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Título:
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Spin transition nanoparticles made electrochemically
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Autores:
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Pozo, Guillermo ;
Presa Muñoz del Toro, Patricia de la ;
Prato, Rafael ;
Morales Casero, Irene ;
Marín Palacios, María Pilar ;
Fransaer, Jan ;
Dominguez-Benetton, Xochitl
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Tipo de documento:
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texto impreso
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Editorial:
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Royal Society of Chemistry, 2020-03-07
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Dimensiones:
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application/pdf
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Nota general:
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cc_by
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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Materials displaying novel magnetic ground states signify the most exciting prospects for nanoscopic devices for nanoelectronics and spintronics. Spin transition materials, e.g., spin liquids and spin glasses, are at the forefront of this pursuit; but the few synthesis routes available do not produce them at the nanoscale. Thus, it remains an open question if and how their spin transition nature persists at such small dimensions. Here we demonstrate a new route to synthesize nanoparticles of spin transition materials, gas-diffusion electrocrystallization (GDEx), wherein the reactive precipitation of soluble metal ions with the products of the oxygen reduction reaction (ORR), i.e., in situ produced H_2O_2, OH^-, drives their formation at the electrochemical interface. Using mixtures of Cu^(2+) and Zn^(2+) as the metal precursors, we form spin transition materials of the herbertsmithite family-heralded as the first experimental material known to exhibit the properties of a quantum spin liquid (QSL). Single-crystal nanoparticles of similar to 10-16 nm were produced by GDEx, with variable Cu/Zn stoichiometry at the interlayer sites of Zn_xCu_(4-x)(OH)_6Cl_2. For x = 1 (herbertsmithite) the GDEx nanoparticles demonstrated a quasi-QSL behavior, whereas for x = 0.3 (0.3
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En línea:
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https://eprints.ucm.es/id/eprint/59962/1/DeLaPresaP%2024%20libre%2BCC.pdf.pdf
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