CAJ | 학술논문

将电化学与表面等离子体激元共振(SPR)光谱技术结合起来，首次应用于研究金电极上聚苯胺(PAn)的动力学增长过程。在PAn膜的形成过程中，发现SPR的动力学曲线随电位的变化而发生连续的振荡。这种电位调制的SPR动力学曲线的振荡归因于电极表面电子密度的变化。SPR动力学曲线的变化趋势表明，PAn膜的增长过程经历了3个不同的动力学阶段。在膜增长的第1阶段，膜增长速度与苯胺浓度的一次方和膜厚的平方根成正比。在膜增长的第2阶段，由于三维增长、膜降解等因素，增长速度明显减小。在第3阶段，膜的降解处于主要地位，PAn膜呈现负增长。不同电聚合方式具有不同的增长速度，并且产生了不同的膜结构和性质。
장전화학여표면등리자체격원공진(SPR)광보기술결합기래，수차응용우연구금전겁상취분알(PAn)적동역학증장과정。재PAn막적형성과정중，발현SPR적동역학곡선수전위적변화이발생련속적진탕。저충전위조제적SPR동역학곡선적진탕귀인우전겁표면전자밀도적변화。SPR동역학곡선적변화추세표명，PAn막적증장과정경력료3개불동적동역학계단。재막증장적제1계단，막증장속도여분알농도적일차방화막후적평방근성정비。재막증장적제2계단，유우삼유증장、막강해등인소，증장속도명현감소。재제3계단，막적강해처우주요지위，PAn막정현부증장。불동전취합방식구유불동적증장속도，병차산생료불동적막결구화성질。
The combination of electrochemistry with surface plasmon resonance (SPR) has been used to in situ investigate the kinetic growth process of polyaniline (PAn) at a gold surface.Sequential oscillations of SPR kinetic curve with a periodicity equal to that of cyclic potential were observed during the film growth.Such a drastic effect is attributed to a larger electronic density at PAn/Au electrode with respect to the bare gold electrode.Evidence from the SPR kinetic curve confirmed that there were three distinct kinetic stages for PAn film growth.In initial fast increase stage,the growth rate of the film was dependant linearly on aniline concentration and the square root of film thickness.A slower kinetic growth was observed in the second stage due to the three dimensional growth and the film degradation.In the third stage,The degradation of PAn film dominates.Different polymerization modes have different growth rate,and thus lead to different structures and properties of the film.