Controlled Synthesis of Icosahedral Gold Nanoparticles and Their Surface-Enhanced Raman Scattering Property

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• 作者：Kihyun Kwon ; Kang Yeol Lee ; Young Wook Lee ; Minjung Kim ; Jinhwa Heo ; Sang Jung Ahn ; Sang Woo Han
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：January 25, 2007
• 年：2007
• 卷：111
• 期：3
• 页码：1161 - 1165
• 全文大小：318K
• 年卷期：v.111,no.3(January 25, 2007)
• ISSN：1932-7455

文摘

The aqueous-phase synthesis of icosahedral gold nanoparticles with controlled diameters ranging from 10 to90 nm is reported. The nanoparticles were prepared by a seed-mediated growth approach. Citrate-capped 3.5nm gold nanoparticles, prepared by reduction of HAuCl₄ with sodium borohydride, are used as seeds.Cetyltrimethylammonium bromide molecules served as a capping agent to restrict the nanoparticles size. Thesynthesized gold nanoparticles were characterized by UV-vis spectroscopy, transmission electron microscopy(TEM), scanning electron microscopy, and X-ray diffraction (XRD). The crystal structure of the particleswas found to consist of mostly {111} surfaces as revealed by both TEM and XRD results. The preparedicosahedral gold nanoparticles show efficient surface-enhanced Raman scattering properties.