Facile synthesis of gold wavy nanowires and investigation of their growth mechanism

Cun Zhu, Hsin Chieh Peng, Jie Zeng, Jingyue Liu, Zhongze Gu, Younan Xia

Research output: Contribution to journalArticle

71 Scopus citations

Abstract

We describe a synthesis of Au wavy nanowires in an aqueous solution in the presence of cetyltrimethylammonium bromide (CTAB). The resultant Au nanowires automatically separated from the solution and floated at the air/water interface. We investigated the formation mechanism by characterizing the samples obtained at different stages of the synthesis. Both particle attachment and cold welding were found to be involved in the formation of such nanowires. Based on X-ray photoelectron spectroscopy and thermogravimetric analysis, the CTAB molecules adsorbed on the surface of a Au nanostructure went through a change in structure from a bilayer to a monolayer, converting the Au surface from hydrophilic to hydrophobic. As a result, the Au wavy nanowires were driven to the air/water interface during the synthesis. This growth mechanism is potentially extendable to many other systems involving small surfactant molecules.

Original languageEnglish (US)
Pages (from-to)20234-20237
Number of pages4
JournalJournal of the American Chemical Society
Volume134
Issue number50
DOIs
StatePublished - Dec 19 2012

    Fingerprint

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this