Optoelectronic properties correlation to preparation of Au/La-oxide nanocomposite films
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Published:2013
Issue:2
Volume:45
Page:189-197
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ISSN:0350-820X
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Container-title:Science of Sintering
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language:en
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Short-container-title:SCI SINTER
Affiliation:
1. Department of Physics, College of Science, University of Bahrain, Kingdom of Bahrain
Abstract
Gold nanoparticles were grown in La-oxide thin films deposited on quartz and
silicon substrates. These films were annealed in pure hydrogen gas atmosphere
at 300?C for different durations 15 min, 30 min, and 45 min and characterised
by the X-ray fluorescence (XRF) and X-ray diffraction. The matrix La-oxide
remained amorphous up to 400?C. The fraction of Au in La-oxide host material
was 7 % molar with crystallite size of 6.8 nm. The Au NPs slightly grew by
annealing in H2 gas at 300 K. The samples were investigated by UV-Vis-NIR
absorption spectroscopy and dc-electrical measurements. They exhibit
conducting properties and with H2 gas annealing, they showed red shifting of
the bandgap with remarkable reduction of optical absorption coefficient by
~25 % and remarkable increase in electrical conductivity ~124 %. A global
study of the influence of low-temperature post annealing in H2 gas on the
electrical, structural, optical, and optoelectronic properties was conducted.
Publisher
National Library of Serbia
Subject
Materials Chemistry,Metals and Alloys,Condensed Matter Physics,Ceramics and Composites
Cited by
1 articles.
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