Web of Science: 15 citas, Scopus: 13 citas, Google Scholar: citas,
Surface hydrogen enables subeutectic vapor-liquid-solid semiconductor nanowire growth
Sivaram, Saujen V. (Georgia Institute of Technology. School of Chemical and Biomolecular Engineering)
Hui, Ho Yee (Georgia Institute of Technology. School of Chemical and Biomolecular Engineering)
De La Mata, Maria (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Filler, Michael A. (Georgia Institute of Technology. School of Chemical and Biomolecular Engineering)

Fecha: 2016
Resumen: Vapor-liquid-solid nanowire growth below the bulk metal-semiconductor eutectic temperature is known for several systems; however, the fundamental processes that govern this behavior are poorly understood. Here, we show that hydrogen atoms adsorbed on the Ge nanowire sidewall enable AuGe catalyst supercooling and control Au transport. Our approach combines in situ infrared spectroscopy to directly and quantitatively determine hydrogen atom coverage with a "regrowth" step that allows catalyst phase to be determined with ex situ electron microscopy. Maintenance of a supercooled catalyst with only hydrogen radical delivery confirms the centrality of sidewall chemistry. This work underscores the importance of the nanowire sidewall and its chemistry on catalyst state, identifies new methods to regulate catalyst composition, and provides synthetic strategies for subeutectic growth in other nanowire systems.
Nota: Número d'acord de subvenció MINECO/MAT2014-51480
Nota: Número d'acord de subvenció AGAUR/2014/SGR-1638
Derechos: Tots els drets reservats.
Lengua: Anglès.
Documento: article ; recerca ; acceptedVersion
Materia: Germanium ; Hydrogen ; Semiconductor nanowire ; Vapor-liquid-solid mechanism
Publicado en: Nano letters, Vol. 16, issue 11 (Sep. 2016) , p. 6717-6723, ISSN 1530-6992

DOI: 10.1021/acs.nanolett.6b01640


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El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > Institut Català de Nanociència i Nanotecnologia (ICN2)
Artículos > Artículos de investigación
Artículos > Artículos publicados

 Registro creado el 2019-01-14, última modificación el 2019-03-28



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