Nano Archive

Size control synthesis of starch capped-gold nanoparticles

Tajammul Hussain, S and Iqbal, M and Mazhar, M (2009) Size control synthesis of starch capped-gold nanoparticles. Journal of Nanoparticle Research, 11 (6). pp. 1383-1391.

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Metallic gold nanoparticles have been synthesized by the reduction of chloroaurate anions [AuCl4]− solution with hydrazine in the aqueous starch and ethylene glycol solution at room temperature and at atmospheric pressure. The characterization of synthesized gold nanoparticles by UV–vis spectroscopy, high resolution transmission electron microscopy (HRTEM), electron diffraction analysis, X-ray diffraction (XRD), and X-rays photoelectron spectroscopy (XPS) indicate that average size of pure gold nanoparticles is 3.5 nm, they are spherical in shape and are pure metallic gold. The concentration effects of [AuCl4]− anions, starch, ethylene glycol, and hydrazine, on particle size, were investigated, and the stabilization mechanism of Au nanoparticles by starch polymer molecules was also studied by FT-IR and thermogravimetric analysis (TGA). FT-IR and TGA analysis shows that hydroxyl groups of starch are responsible of capping and stabilizing gold nanoparticles. The UV–vis spectrum of these samples shows that there is blue shift in surface plasmon resonance peak with decrease in particle size due to the quantum confinement effect, a supporting evidence of formation of gold nanoparticles and this shift remains stable even after 3 months.

Item Type:Article
Uncontrolled Keywords:Gold nanoparticles - Starch - Synthesis - Particle size-control
Subjects:Material Science > Nanofabrication processes and tools
ID Code:6561
Deposited By:SPI
Deposited On:27 Jul 2009 14:25
Last Modified:27 Jul 2009 14:25

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