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Título:
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Zn_2GeO_4/SnO_2 nanowire heterostructures driven by plateau-rayleigh instability
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Autores:
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Dolado Fernández, Jaime ;
Renforth, Kate L. ;
Nunn, James E ;
Hindsmarsh, Steve A. ;
Hidalgo Alcalde, Pedro ;
Sánchez, Ana M. ;
Méndez Martín, Bianchi
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Tipo de documento:
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texto impreso
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Editorial:
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American Chemical Society, 2020-01
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Dimensiones:
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application/pdf
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Nota general:
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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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Herein, we report the formation of a particular core-shell structure, with a zinc germanate (Zn_2GeO_4) nanowire core and a discontinuous shell of SnO_2 nanocrystals, obtained in a single-step process. We propose a growth model that combines the Plateau-Rayleigh mechanism to produce a pattern of amorphous germanium oxide (a-GeO_2) particles along the Zn_2GeO_4 nanowire and the subsequent growth of well-faceted SnO_2 crystals when the nanowire orientation meets good lattice matching conditions. In this latter case, the linear array of a-GeO_2 particles acts as nucleation sites for the SnO_2 crystallites, leading to a skewer-like morphology that retains the periodicity of the Plateau-Rayleigh process. Otherwise, nanowires with different orientations appear decorated with a pattern of a-GeO_2 beads mimicking a necklace. Atomic resolution electron microscopy has been used to characterize the Zn_2GeO_4/SnO_2 nanoheterostructures. In addition, optical confinement effects have been observed in the luminescence maps and spectra, which have potential for further exploitation in the design of optical microcavities.
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En línea:
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https://eprints.ucm.es/id/eprint/59219/1/MendezBianchi105%20POST%2BEMB_01_ene_2021.pdf
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