通过选择沉积电位、温度、电解液浓度等条件, 调控银粒子的成核和生长速度, 调控晶面的择优取向, 诱导枝状生长, 从而制得巢状微结构银粒子, 并对其生长机理进行了研究. 采用扫描电子显微镜(SEM)和X 射线衍射光谱(XRD)对巢状微结构银粒子形貌和结构进行表征. 以罗丹明6G 为探针分子, 研究了巢状微结构银粒子的表面增强拉曼光谱(SERS), 并与无孔银粒子对照. 结果表明: 巢状微结构银粒子的SERS 较无孔银粒子有明显增强, 拉曼增强因子达到1.7×106.
Nest-like Ag microcrystals were prepared by electrochemical methods. Synthetic parameters were elucidated, including deposition potential, temperature and concentration that can systematically control branching or faceting growth during electrodeposition process. SEM, XRD and surface enhanced Raman spectroscopy (SERS) were employed to characterize the structure and properties of nest-like Ag microcrystals. The nest-like Ag microcrystals show the enhanced SERS for Rhodamine 6G, and the Raman enhancement factor reaches 1.7×106.
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