Hollow Silicon Nanostructures via the Kirkendall Effect

Title
Hollow Silicon Nanostructures via the Kirkendall Effect
Authors
손윤국손연국최민고민성채수종박노정조재필
Keywords
Silicon; Nanostructures; kirkendall effect; First principles
Issue Date
2015-09
Publisher
Nano letters
Citation
VOL 15, NO 10, 6914-6918
Abstract
The Kirkendall effect is a simple, novel phenomenon that may be applied for the synthesis of hollow nanostructures with designed pore structures and chemical composition. We demonstrate the use of the Kirkendall effect for silicon (Si) and germanium (Ge) nanowires (NWs) and nanopartides (NPs) via introduction of nanoscale surface layers of SiO2 and GeO2, respectively. Depending on the reaction time, Si and Ge atoms gradually diffuse outward through the oxide layers, with pore formation in the nanostnictural cores. Through the Kirkendall effect, NWs and NPs were transformed into nanotubes (NTs) and hollow NPs, respectively. The mechanism of the Kirkendall effect was studied via quantum molecular dynamics calculations. The hollow products demonstrated better electrochemical performance than their solid counterparts because the pores developed in the nanostructures resulted in lower external pressures during lithiation.
URI
http://pubs.kist.re.kr/handle/201004/50726
ISSN
15306984
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE