Manipulation of the Growth of Gold and Silver Nanomaterials on Glass by Seeding Approach

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• 作者：Kun-Hong Lee ; Kung-Ming Huang ; Wei-Lung Tseng ; Tai-Chia Chiu ; Yang-Wei Lin ; Huan-Tsung Chang
• 刊名：Langmuir
• 出版年：2007
• 出版时间：January 30, 2007
• 年：2007
• 卷：23
• 期：3
• 页码：1435 - 1442
• 全文大小：781K
• 年卷期：v.23,no.3(January 30, 2007)
• ISSN：1520-5827

文摘

This paper describes the growth of gold and silver nanomaterials from their corresponding colloidal seeds on glasssubstrates. The glass substrates were treated with 3-mercaptopropyltrimethoxysilane (MPTMS) and then with goldor silver nanoparticle seeds (AuNPSs or AgNPSs) at different concentrations. After separately immersing the thus-prepared MPTMS-AuNPS and MPTMS-AgNPS glass substrates in aqueous solutions containing cetyltrimethylammonium bromide, ascorbic acid, and gold or silver ions, we obtained Au and Ag nanomaterials of different sizesand shapes, which we characterized through scanning electron microscopy (SEM) and dark-field microscopy (DFM).At 0.001× concentrations AuNPSs and AgNPSs (i.e., 1000-fold-diluted solutions of the as-prepared samples), Auand Ag nanomaterials having 1.36 and 5.21 m lengths and aspect ratios of 11 and 24 were prepared in yields of27% and 54%, respectively. Scattering spectra of the thus-prepared single AuNRs and AgNRs revealed that theuniformity in the shape of the AuNRs was greater than that of the AgNRs. In addition, we demonstrate the preparation(using a laboratory-made synthesis system) and characterization (through DFM measurements) of Au nanomaterials,including AuNRs, from five AuNPS solutions of different concentrations on a single glass substrate.