聚吡咯
材料科学
微观结构
单体
多孔性
微电极
俘获
电场
电极
纳米技术
化学
复合材料
聚合
聚合物
生态学
物理
物理化学
量子力学
生物
作者
Seung Kwon Seol,Ji Tae Kim,Jung Ho Je,Y. Hwu,G. Margaritondo
出处
期刊:Macromolecules
[American Chemical Society]
日期:2008-04-02
卷期号:41 (9): 3071-3074
被引量:21
摘要
We present the three-dimensional (3D) growth of polypyrrole (PPy) microstructures with high aspect ratios (HAR) by a localized electropolymerization. The radicals formed by an oxidation of Py monomer is localized on the targeting area due to a confinement of electric field, forming a PPy structure. We found that a reversal point at which the relative field strengths of Ec (center of the grown structure) and Ee (edge) are reversed is a critical factor in determining the growth characteristic of the 3D PPy structure. A porous structure with open and closed pores is produced below the reversal point by the hydrogen bubble trapping in a gap between the microelectrode and the grown structure. Above the reversal point, a structure with dense and uniform features is obtained by a steady supply of monomer in the gap without bubble trapping.
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