AU - Entezari, Sanaz AU - mansour, nastran AU - Pouramini, mostafa TI - Thin layer of gold nanoparticles core-shell synthesis and ultraviolet absorption peaks observation PT - JOURNAL ARTICLE TA - opsi JN - opsi VO - 20 VI - 0 IP - 0 4099 - http://opsi.ir/article-1-216-en.html 4100 - http://opsi.ir/article-1-216-en.pdf SO - opsi 0 ABĀ  - 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. CP - IRAN IN - LG - eng PB - opsi PG - 1377 PT - Research YR - 2014