Green Synthesis of Silver Nanoparticles and Their Application in SERS
YANG Bi-wen, GUO Zhou-yi, LIU Zhi-ming, WAN Ming-ming, QIN Xiao-chu, ZHONG Hui-qing*
MOE Key Laboratory of Laser Life Science & SATCM Third Grade Laboratory of Chinese Medicine and Photonics Technology College of Biophotonics, South China Normal University, Guangzhou 510631, China
Abstract：In the present paper, we have successfully synthesized silver nancomparticles by reducing of silver nitrate in alkaline solution via 60 ℃ water bath for 20 minutes with the use of tyrosine, a nontoxic and green macromolecule, as a reducing and stabilizing agent. The formation of silver nanoparticles was observed visually by color change of the solutions (from faint yellow to brown yellow). The morphologies of the Ag NPs were characterized by UV-Vis absorption spectroscopy and transmission electron microscopy (TEM). The UV-Vis absorption peak of silver nanoparticles located at 412 nm. The TEM image of silver nanoparticles indicated that the diameters of nanospheres are mainly in the range 15～25 nm. In order to evaluate the SERS activity of the silver nancomparticles, crystal violet and folic acid were used as the Raman probe molecule. The experimental results indicated that there are two ascendancies, firstly, the approach is convenient and the reaction condition is facile, secondly, tyrosine is a water-soluble, nontoxic and biodegradable macromolecule, which makes this approach provide a green strategy to prepare Ag NPs. Significantly, the synthesized Ag NPs exhibits good surface enhanced Raman scattering (SERS) activity as SERS substrates to detect crystal violet and folic acid in aqueous solution.
杨必文，郭周义，刘智明，万明明，覃筱楚，钟会清* . 绿色合成银纳米粒子及其在SERS中的应用 [J]. 光谱学与光谱分析, 2013, 33(07): 1816-1819.
YANG Bi-wen, GUO Zhou-yi, LIU Zhi-ming, WAN Ming-ming, QIN Xiao-chu, ZHONG Hui-qing* . Green Synthesis of Silver Nanoparticles and Their Application in SERS . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(07): 1816-1819.
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