混合自组装膜的选择性解吸及聚吡咯的电化学沉积

采用交流阻抗和循环伏安法对十二硫醇和巯基乙酸不同比例的混合自组装膜解吸前后进行了比较研究，并利用解吸后的自组装模板电聚合吡咯。交流阻抗研究表明随着十二硫醇量的增大，交流阻抗高频区的半园直径不断增大，对应于电子转移电阻(Rc1)的增大；循环伏安研究表明不同比例的十二硫醇和巯基乙酸在组成自组装膜时形成几乎相同的一相，解吸时并不出现相分离，聚吡咯选择性地在解吸后的针孔缺陷中沉积，而得到图案化的自组装沉积表面。

Selective Desorption of Mixed Monolayers and Electro-Deposition of Pyrrole

Cyclic voltammetry and A C impedance were used to study the mixed SAMs of mercaptoacetic acid and dodecanthiol comparatively before and after the reductive desoption. The electro polymerization of pyrrole on the patterned SAMs after reductive desorption was also studied. The results of A C impedance experiments indicated that the diameter of high frequency semi circle corresponding to charge transfer resistent( R ct ) increased with increasing content of dodecanthiol. The results of cyclic voltammetry showed that the mixed monolayer formed a symmetrical phase instead of phase segregation in the SAMs.The electro deposition of pyrrole on the surface of mixed SAMs after reductive desorption progressed selectively in the pinhole of SAMs and a patterned surface obtained.