%0 Journal Article
%T Effect of Substrate Temperature on Structural and Optical Properties of Au/SiO2 Nanocomposite Films Prepared by RF Magnetron Sputtering
%A Ahmed Belahmar
%A Ali Chouiyakh
%J Open Access Library Journal
%V 4
%N 8
%P 1-11
%@ 2333-9721
%D 2017
%I Open Access Library
%R 10.4236/oalib.1103810
%X
Silica films
containing gold nanoparticles were grown by magnetron radio frequency (rf) sputtering
technique under various deposition conditions. The structural and optical properties
of the composite films deposited at 400 substrate temperature were compared with
those deposited at room temperature. Effect of substrate temperature of AuNPs on
micro structural properties of the Au/SiO2 nanocomposite films, such
as size, dislocation density (), strain
() and lattice distortion (LD) have been
investigated. The face-centered cubic crystalline structure of Au nanoparticles inclusion in the
amorphous silica dielectric matrix was confirmed using X-ray diffraction. The average
grain size of AuNPs has been found in the range of 0.56 - 0.60 nm
and 1.15 - 1.23 nm at 3 103 mbar and 2 103 mbar argon pressure respectively. The , , LD values change inversely with the
increasing of the substrate temperatures. These composites exhibit the optical features
of a semiconductor with direct band gap. The band gap energy of 3.85 eV and 4.1
eV achieved for gold nanoparticles when the substrate temperatures increases from
25 to 400. A peak wavelength of the surface plasmon resonance band absorption
(SPR) characteristic of gold nanoparticle was found around 500 nm for the sample
deposited at 2 103 mbar and at 400 substrate temperature.
%K Gold Nanoparticles
%K Sputtering
%K Lattice Distortion
%K Substrate Temperature
%U http://www.oalib.com/paper/5288175