【摘要】 借助紫外-可见吸收光谱、透射电子显微镜和拉曼光谱技术,研究了几种阴离子(OH-、CO23-、SO24-、NO3-)对黄银胶的存在状态的影响.研究发现,阴离子的加入会引起胶体的凝聚和聚集体外形的改变,造成吸收光谱长波区新峰和异常拉曼光谱信号的出现.比较这些实验现象,再结合相应的理论分析,揭示了不同的阴离子和胶体间不同的作用方式和造成这些差别的可能原因.更多还原

【Abstract】 The aggregation effect of yellow silver colloids caused by adding some anions has been investigated with UV-Vis absorption, transmission electron microscopy (TEM), and Raman spectra. It was found that colloidal aggregation and shape changing occurred when anions were added, in addition, an absorption peak at much longer wavelength and an exceptional Raman signals appeared. The experimental results indicated that the effects of various anions were different from each other, and the possible mechanism was discussed.更多还原