Artículos de revistas
Enhanced Mechanical Stability of Gold Nanotips through Carbon Nanocone Encapsulation
Fecha
2015-06-17Registro en:
Scientific Reports. London: Nature Publishing Group, v. 5, 5 p., 2015.
2045-2322
10.1038/srep10408
WOS:000356518200001
WOS000356518200001.pdf
Autor
Universidade Federal de Minas Gerais (UFMG)
Penn State Univ
Ctr Desenvolvimento Tecnol Nucl
Universidade Estadual de Campinas (UNICAMP)
Universidade Estadual Paulista (Unesp)
Institución
Resumen
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.