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Type: Artigo de periódico
Title: III-V semiconductor nanowire growth: does arsenic diffuse through the metal nanoparticle catalyst?
Author: Tizei, LHG
Chiaramonte, T
Ugarte, D
Cotta, MA
Abstract: The synthesis of III-V semiconductor nanowires (NWs) is based on the delivery of atoms from a vapor phase to a catalytic metal nanoparticle (NP). Although there has been extensive work on such systems, the incorporation pathways of group V atoms remain an open issue. Here, we have performed a detailed structural and chemical analysis of the catalyst NP in NWs where we switch the V atomic element during growth (heterostructured InP/InAs/InP NWs). Our experimental results indicate a group V pathway where these atoms actually diffuse through the catalytic NP by formation of a stable phase containing As under growth conditions. We have observed distinct NW growth behavior within a narrow temperature range (30 degrees C) suggesting a transition between vapor-liquid-solid and vapor- solid-solid growth modes.
Country: Inglaterra
Editor: Iop Publishing Ltd
Citation: Nanotechnology. Iop Publishing Ltd, v. 20, n. 27, 2009.
Rights: fechado
Identifier DOI: 10.1088/0957-4484/20/27/275604
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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