01654nas a2200181   4500008004100000022001400041245011500055210006900170260008000239300002600319490000700345520090800352100002901260700001901289700001901308700002101327856012401348       2006                        eng d  a0957-448400aThermally assisted semiconductor-like to insulator transition in gold-poly(methyl methacrylate) nanocomposites0 aThermally assisted semiconductorlike to insulator transition in   aDIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLANDbIOP PUBLISHING LTDcAUG  aArticle No. 4129-41340 v173 a<p>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.</p>1 aAbyaneh, Majid, Kazemian1 aPasricha, Renu1 aGosavi, S., W.1 aKulkarni, S., K.  uhttps://library.ncl.res.in/content/thermally-assisted-semiconductor-insulator-transition-gold-polymethyl-methacrylate-0