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

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

doi:10.1088/0957-4484/17/16/023

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

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

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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 language	English (US)
Article number	023
Pages (from-to)	4129-4134
Number of pages	6
Journal	Nanotechnology
Volume	17
Issue number	16
DOIs	https://doi.org/10.1088/0957-4484/17/16/023
State	Published - Aug 28 2006

ASJC Scopus subject areas

Bioengineering
General Chemistry
General Materials Science
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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10.1088/0957-4484/17/16/023

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

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.",

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AU - Kulkarni, S. K.

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AB - 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.

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

Abstract

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