Synthesis and characterization of L-histidine capped silver nanoparticles

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• 作者：Zhiguo Liu ; ^{zguoliu@yahoo.com.cn} ; Zhimin Xing ; Yuangang Zu ; ^{nefunano@yahoo.com.cn} ; Shengnan Tan ; Lin Zhao ; Zhen Zhou ; Tongze Sun
• 关键词：Ag nanoparticles ; L-histidine ; Hydrothermal synthesis ; Ni2+ ; Colloid
• 刊名：Materials Science and Engineering ; C
• 出版年：2012
• 期刊代码：63_09284931
• 类别：ms
• 出版时间：1 May, 2012
• 卷：32
• 期：4
• 页码：811-816
• 文件大小：1018 K

摘要

L-histidine capped Ag nanoparticles have been synthesized by a hydrothermal method. Spherical Ag nanoparticles with average diameter ranging from 9 to 21 nm can be obtained by tuning the reaction pH and the reactant ratio. The topography, surface and internal structures of the histidine capped Ag nanoparticles have been characterized by transmission electron microscopy (TEM), atomic force microscopy (AFM), dynamic light scattering, X-ray photoelectron spectroscopy (XPS), X-ray Diffraction (XRD), Raman spectroscopy and UV-vis absorption spectroscopy. Surface enhanced Raman scattering (SERS) results revealed that the Ag colloid in present study have a structure that the imidazole moiety of histidine is bound on the Ag surface and COO^{鈭?/sup> group is exposed outward. The as-synthesized Ag colloidal solution was very stable and can be stored at room temperature at least one month. In addition, it was found that the solution color of Ag colloid can change from yellow to reddish-brown by addition of the NiCl₂ solution, which may have potential application for Ni2+ detection.}