Journal
RSC ADVANCES
Volume 6, Issue 40, Pages 33326-33331Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra03403a
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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.
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