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以立方的AgCl纳米结构作为前躯体,利用共聚焦拉曼光谱仪的光源原位辐射获取新鲜Ag,并同步用于对巯基吡啶(4-Mpy)分子的SERS检测。结果表明:随着辐射时间的增加,4-Mpy分子的SERS信号强度增加并趋于最大值。结合信号强度和AgCl表面形貌及其化学组分的演变,给出了一种可能的机理解释。
In situ AgCl nanostructures were used as precursors, and fresh Ag was obtained by in-situ radiation from a confocal Raman spectrometer and simultaneously used for the SERS detection of 4-Mpy pyrithione. The results showed that the SERS signal intensity of 4-Mpy molecules increased and reached the maximum with the increase of irradiation time. Combined with the signal intensity and the evolution of AgCl surface topography and its chemical composition, a possible mechanism explanation is given.