Thermally assisted semiconductor-like to insulator transition in gold-poly(methyl methacrylate) nanocomposites

Majid Kazemian Abyaneh, Renu Pasricha, S. W. Gosavi, S. K. Kulkarni

Research output: Contribution to journalArticlepeer-review

Abstract

Gold-polymethylmethacrylate (PMMA) nanocomposites were fabricated by mixing gold nanoparticles capped with oleylamine in polymethylmethacrylate. The samples were analysed using UV-vis absorption spectroscopy, transmission electron microscopy, small angle x-ray scattering, Fourier transform infrared spectrometry (FTIR) and x-ray photoelectron spectroscopy (XPS). Electrical resistivity of nanocomposite samples was measured by a four-probe technique in the 70-300K range. The nanocomposites showed a transition with an onset at ∼160-165K. They exhibited a semiconductor-like conductivity at higher temperatures and nearly temperature independent conductivity at lower temperatures. The interfacial interaction of Au nanoparticles and PMMA polymer is investigated using FTIR and XPS. A ligand-exchange process occurs when capped gold nanoparticles are incorporated in PMMA polymer.

Original languageEnglish (US)
Article number023
Pages (from-to)4129-4134
Number of pages6
JournalNanotechnology
Volume17
Issue number16
DOIs
StatePublished - Aug 28 2006

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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