Synthesis of Ag-Au bimetallic film at liquid-liquid interface and its application in vapor sensing

Renu Pasricha, Shweta Gupta, M. Sastry, Nahar Singh, Prabhat Gupta

Research output: Contribution to journalArticlepeer-review

Abstract

We demonstrate a novel process for preparing densely packed film of silver nanoparticles at the liquid-liquid interface followed by a transmetallation reaction with gold ion to yield a film of bimetallic nanoparticles. Films of assembled silver as well as Ag-Au bimetallic were characterized by UV-vis-spectroscopy, transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) analysis. I-V measurement shows linear behavior for both the films with ca. five orders of magnitude drop in resistance for the Ag-Au bimetallic film. Temperature dependent I-V measurement revealed a semiconductor to metal transition after transmetallation reaction. The films where checked for their potential application in chemical vapor sensing to ammonia vapors.

Original languageEnglish (US)
Pages (from-to)1248-1251
Number of pages4
JournalThin Solid Films
Volume519
Issue number3
DOIs
StatePublished - Nov 30 2010

Keywords

  • Bimetallic film
  • Gas sensing
  • I-V measurements
  • Liquid-liquid interface

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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