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The role of carbon contamination in metallic nanowires

By Douglas Soares Galvão, Varlei Rodrigues, Daniel Ugarte and Sergio Benites Legoas

Abstract

Metallic nanowires have attracted much attention in the last years due to new phenomena such as quantum conductance and the existence of unexpected long interatomic distances attaining 0.3-0.5 nm. These large distances represented a challenge for physical interpretation. In this work we present experimental data from high-resolution transmission electron microscopy and results from ab initio calculations for suspended gold chains and show that these large distances can be easily explained by the presence of carbon atoms as contaminants. In principle the present conclusions can be also applied to other metallic nanowires (such as Ag and Pt) whose structures also present large interatomic distances

Topics: gold nanowires, quantum conductance, carbon contamination, Materials of engineering and construction. Mechanics of materials, TA401-492, Electrical engineering. Electronics. Nuclear engineering, TK1-9971, Technology, T, DOAJ:Materials, DOAJ:Technology and Engineering
Publisher: Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
Year: 2004
DOI identifier: 10.1590/S1516-14392004000200020
OAI identifier: oai:doaj.org/article:2bbb0e3651584808a2f8b47b1739eec8
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