Conductive and SERS-active colloidal gold films spontaneously formed at a liquid/liquid interface

Xiuxiu Yin, Yossef Peretz, Pola G. Oppenheimer, Leila Zeiri, Alexandra Masarwa, Natalya Froumin, Raz Jelinek

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We show that water-soluble gold thiocyanate salt [KAu(SCN)4] spontaneously formed electrically-conductive and surface enhanced Raman scattering (SERS)-active films at the interface between water and pentane. Microscopy and spectroscopic analyses reveal that the films comprised of condensed Au nanoparticles, assembled via crystallization of KAu(SCN)4 and self-reduction of the Au3+ ions by the thiocyanate ligands. Importantly, the pentane phase was crucial in promoting the crystallization/reduction reactions. The Au films exhibited useful applications, including excellent conductivity and SERS sensing. We also show that the new film self-assembly process could be readily harnessed for producing macro-scale Au patterns.

Original languageEnglish
Pages (from-to)33326-33331
Number of pages6
JournalRSC Advances
Volume6
Issue number40
DOIs
StatePublished - 1 Jan 2016

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)

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