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

Research output: Contribution to journalArticle

Authors

Colleges, School and Institutes

External organisations

  • Ben Gurion Univ Negev

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.

Details

Original languageEnglish
Pages (from-to)33326-33331
JournalRSC Advances
Issue number6
Publication statusPublished - 29 Mar 2016