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The Role of Carbon Contamination in Suspended Gold Nanowires

Published online by Cambridge University Press:  11 February 2011

Sergio B. Legoas ,
Douglas S. Galvão ,
Varlei Rodrigues  and
Daniel Ugarte
Sergio B. Legoas
Affiliation:
Instituto de Física, Universidade Estadual de Campinas, 13083–970 Campinas, SP, Brazil
Douglas S. Galvão
Affiliation:
Instituto de Física, Universidade Estadual de Campinas, 13083–970 Campinas, SP, Brazil
Varlei Rodrigues
Affiliation:
Laboratório Nacional de Luz Síncrotron, 13084–971 Campinas, SP, Brazil
Daniel Ugarte
Affiliation:
Laboratório Nacional de Luz Síncrotron, 13084–971 Campinas, SP, Brazil
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Abstract

Metallic nanowires represent very interesting systems due to new phenomena such as quantum conductance and unexpected long interatomic distances attaining 0.3–0.5 nm. These large distances represent a challenge for physical interpretation. In this work we present experimental data from transmission electron microscopy and results from ab initio density functional calculations for suspended gold chains. We show that large distances as 0.5 nm can be easily explained by the presence of carbon atoms as contaminants, while distances ranging from 0.29 up to 0.36 nm might be explained as resulting of a mixture of clean stressed and contaminated linear chains.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 761: Symposia B/C/D/F/G/NN – Molecular Electronics , 2002 , NN8.6/G14.6
Copyright
Copyright © Materials Research Society 2003

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