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

TitleThermally assisted semiconductor-like to insulator transition in gold-poly(methyl methacrylate) nanocomposites
Publication TypeJournal Article
Year of Publication2006
AuthorsAbyaneh, MKazemian, Pasricha, R, Gosavi, SW, Kulkarni, SK
JournalNanotechnology
Volume17
Issue16
PaginationArticle No. 4129-4134
Date PublishedAUG
Type of ArticleArticle
ISSN0957-4484
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 70-300 K range. The nanocomposites showed a transition with an onset at similar to 160-165 K. 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.

DOI10.1088/0957-4484/17/16/023
Type of Journal (Indian or Foreign)

Foreign

Impact Factor (IF)

3.573

Divison category: 
Physical and Materials Chemistry