Size Controlled Synthesis of 2-6 nm Gold Nanoparticles via Controlling Concentration of the Reducing Agent and Temperature

Abstract:

We reported a facile synthesis route for size controlled preparation of gold nanoparticles (Au NPs) by controlling concentration of the reducing agent and temperature. Nearly monodisperse Au NPs with mean diameters of 2-6 nm are acquired via the reduction of HAuCl₄ by NaBH₄ in the presence of tri-n-octyl amine and dodecanethiol in solvent of toluene. Results indicate that concentration of the reducing agent and temperature are key factors to tune the particle size and uniformity in the synthesis of Au NPs. The as-synthesized Au NPs show size dependent surface plasmonic properties between 510 and 525 nm, while Au NPs with size smaller than 3 nm do not clearly show the property.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 572-576
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.572
• Online since: July 2012
• Authors: Wei Luo, Fei Wang, Xue Ao Zhang, Zheng Zheng Shao, Jing Yue Fang, Sheng Li Chang, Shi Qiao Qin
• Keywords: Gold Nanoparticles (GNP), Monodisperse, Size Control

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