Metal surface nucleated supercritical fluid–solid–solid growth of Si and Ge/SiOx core–shell nanowires

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Title: Metal surface nucleated supercritical fluid–solid–solid growth of Si and Ge/SiOx core–shell nanowires
Authors: Barrett, Christopher A.
Gunning, Robert Denis
Hantschel, Thomas
Arstila, Kai
O'Sullivan, Catriona
Geaney, Hugh
Ryan, Kevin M.
Permanent link: http://hdl.handle.net/10197/2828
Date: Jan-2010
Abstract: High yields of single-crystalline silicon nanowires and germanium/silicon oxide core-shell nanostructures were synthesized using a supercritical fluid-solid-solid growth mechanism. The formation of the one-dimensional nanostructures was investigated on stainless steel and titanium reactor cell walls. The nanowire growth is diffusion controlled with no catalyst particles being observed at the tip of the nanowires, which is contrary to the characteristic feature of a one-dimensional growth based on the vapor-liquid-solid mechanism. The diameter and length of the nanowires were in the ranges of 30-60 nm and 1-10 µm, respectively, as found by high-resolution electron microscopy. The nanowires were characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM).
Funding Details: Science Foundation Ireland
Irish Research Council for Science, Engineering and Technology
Type of material: Journal Article
Publisher: RSC publications
Copyright (published version): The Royal Society of Chemistry 2010
Keywords: Silicon nanowires;Germanium/silicon oxide;Core-shell nanostructures;TEM;SEM;EDX
Subject LCSH: Nanosilicon
Nanowires
Germanium compounds
DOI: 10.1039/b914950c
Language: en
Status of Item: Peer reviewed
Appears in Collections:Solar Energy Conversion (SEC) Cluster Research Collection

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