Enhanced Mechanical Stability of Gold Nanotips through Carbon Nanocone Encapsulation

Autor(es):Mostrar menos -

Cano-Marquez, Abraham G. ^{[1, 2]} ; Schmidt, Wesller G. ^[3] ; Ribeiro-Soares, Jenaina ^[1] ; Cancado, Luiz Gustavo ^[1] ; Rodrigues, Wagner N. ^[1] ; Santos, Adelina P. ^[4] ; Furtado, Clascidia A. ^[4] ; Autreto, Pedro A. S. ^[5] ; Paupitz, Ricardo ^[6] ; Galvao, Douglas S. ^[5] ; Jorio, Ado ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Minas Gerais, ICEx, Dept Fis, BR-31270901 Belo Horizonte, MG - Brazil

^[2] Penn State Univ, Mat Res Inst, University Pk, PA 16802 - USA

^[3] Univ Fed Minas Gerais, Ctr Microscopia, BR-30123970 Belo Horizonte, MG - Brazil

^[4] Ctr Desenvolvimento Tecnol Nucl, BR-31270010 Belo Horizonte, MG - Brazil

^[5] Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP - Brazil

^[6] Univ Estadual Paulista, UNESP, IGCE, Dept Fis, Rio Claro, SP 13506900 - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 5, JUN 17 2015.
• Citações Web of Science: 9

Resumo

Gold is a noble metal that, in comparison with silver and copper, has the advantage of corrosion resistance. Despite its high conductivity, chemical stability and biocompatibility, gold exhibits high plasticity, which limits its applications in some nanodevices. Here, we report an experimental and theoretical study on how to attain enhanced mechanical stability of gold nanotips. The gold tips were fabricated by chemical etching and further encapsulated with carbon nanocones via nanomanipulation. Atomic force microscopy experiments were carried out to test their mechanical stability. Molecular dynamics simulations show that the encapsulated nanocone changes the strain release mechanisms at the nanoscale by blocking gold atomic sliding, redistributing the strain along the whole nanostructure. The carbon nanocones are conducting and can induce magnetism, thus opening new avenues on the exploitation of transport, mechanical and magnetic properties of gold covered by sp(2) carbon at the nanoscale. (AU)

• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 11/17253-3 - Dinâmica de formação e propriedades eletrônicas e estruturais do grafeno e compostos similares
• Beneficiário: Ricardo Paupitz Barbosa dos Santos
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/09536-0 - Aplicações e desenvolvimento de potenciais reativos para o estudo de sistemas moleculares
• Beneficiário: Ricardo Paupitz Barbosa dos Santos
• Modalidade de apoio: Bolsas no Exterior - Pesquisa