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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Enhanced Mechanical Stability of Gold Nanotips through Carbon Nanocone Encapsulation

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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]
Total Authors: 11
[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
Total Affiliations: 6
Document type: Journal article
Source: SCIENTIFIC REPORTS; v. 5, JUN 17 2015.
Web of Science Citations: 9

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)

FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 11/17253-3 - Dynamics of formation, electronic and structural properties of graphene and similar compounds
Grantee:Ricardo Paupitz Barbosa dos Santos
Support Opportunities: Regular Research Grants
FAPESP's process: 13/09536-0 - Development and applications for reactive potentials in the study of molecular systems
Grantee:Ricardo Paupitz Barbosa dos Santos
Support Opportunities: Scholarships abroad - Research