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室温下,通过控制银种子胶体pH值,采用光诱导法制备出银三角纳米粒子,并对其表面增强喇曼散射活性和时间稳定性进行了实验研究.对比分析了新制备样品与在暗室中存放5个月样品的透射电子显微镜照片、紫外-可见吸收光谱和表面增强喇曼光谱.结果表明:所制备的银三角纳米粒子在室温暗室中存放5个月后其几何形状、尺寸以及相应吸收峰的位置基本不变,具有较好的时间稳定性,对罗丹明6G探针分子仍具有较好的表面增强喇曼效应.
By controlling the pH value of silver seed colloids at room temperature, the silver triangular nanoparticles were prepared by light-induced method and the surface-enhanced Raman scattering activity and time stability of the nanoparticles were studied.Compared with the freshly prepared samples, The TEM images of the samples were stored for 5 months, and their UV-Vis absorption spectra and surface-enhanced Raman spectra were obtained. The results showed that the prepared silver nanoparticles were stored in a dark room at room temperature for five months and their geometry, size and absorption The position of the peak is basically the same, with good time stability, and still has better surface-enhanced Raman effect on the rhodamine 6G probe molecule.