电化学汞齐法处理金表面的增强拉曼散射研究

Enhanced Raman Scattering Studies on Gold Surface Treated by Electrochemical Amalgamation

采用汞盐的电化学还原法可通过控制电解的时间及速度来控制在金表面还原生成的金属汞的量，从而使金表面获得可控制的刻蚀，形成适当的粗糙度。以２，２联吡啶作为探针化合物吸附于在不同条件下汞齐化处理的金表面，收集其拉曼信号以确定最佳的刻蚀条件。经电化学汞齐化刻蚀活化的金表面比用通常的氧化还原循环处理的金表面具有更好的增强效果。将聚噻吩沉积在以上述刻蚀法粗糙化的金电极表面可获得信噪比高的亚单分子层的聚噻吩的ＳＥＲＳ谱，并表明在三氟化硼乙醚中沉积的聚噻吩较之在通常的有机溶剂中沉积的聚噻吩具有更有序的排列结构。

A new etching method was developed to produce active gold surface with a suitable roughness, which can effectively enhance the Raman signal of molecules absorbed onto it. Using electrochemieal amalgamation under optimized conditions, high quality Raman spectra of the electrochemically deposited polymer submonolayer onto the activated gold surface were recorded. The molecular orientation of the polymer film was studied.