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Entezari S, mansour N, Pouramini M. Thin layer of gold nanoparticles core-shell synthesis and ultraviolet absorption peaks observation. ICOP & ICPET _ INPC _ ICOFS 2014; 20 :1377-1380
URL: http://opsi.ir/article-1-216-en.html
URL: http://opsi.ir/article-1-216-en.html
Abstract: (8652 Views)
In this work, thin layer of gold nanoparticles core-shell on a quartz substrate is fabricated by the centrifuge deposition of nanoparticles from a colloidal solution and subsequent thermal annealing in air at 600 0C. X-ray photoelectron spectroscopy (XPS) of the film reveals formation of the core-shell structure with gold core and Au-O shell. Optical properties of the nanogold thin film have studied by UV-visible spectrometer. The results include three absorption peaks at 520 nm associated with gold nanopaticles surface plasmon resonance (SPR), 385 nm related to the oxide layer and 240 nm due to inter band transition of semiconducting property of Au nanoparticles. The fabricated thin layer of gold nanoparticle core-shell with different absorption peaks is a good candidate material for biological sensors, catalyst applications and photoluminescence.
Keywords: gold nanoparticle thin layer, core-shell structure, X-ray photoelectron spectroscopy, Au=O shell layer, ultraviolet absorption peaks
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