Selective deposition of conducting polymers on hydroxyl-terminated surfaces with printed monolayers of alkylsiloxanes as templates
Selective deposition of conducting polymers on hydroxyl-terminated surfaces with printed monolayers of alkylsiloxanes as templates
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DOI：
10.1021/la970537z
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发表时间：
1997-11-26
期刊：
影响因子：
3.9
通讯作者：
Whitesides, G
中科院分区：
文献类型：
--
作者：
Huang, ZY;Wang, PC;Whitesides, G
本文介绍了使用图案化的自组装单分子膜（SAMs）的区域选择性沉积的导电聚合物（聚吡咯和聚苯胺）绝缘，羟基封端的表面，如Si/SiO2和玻璃。使用微接触印刷在羟基封端的表面上产生十八烷基硅氧烷的图案化自组装膜;它们定义并指导导电聚合物的沉积。在疏水表面上的沉积速率高于在亲水表面上的沉积速率：将用甲基封端的SAM图案化的衬底浸入适当的水性聚合浴中在表面上产生导电聚合物的“正"图案。沉积在被聚合物完全覆盖的表面的疏水区域上的导电聚合物可以通过将其转移到胶带上以在胶带上形成“正"图案而容易地去除，在基底的表面上留下”负"图案。沉积在疏水表面上的导电聚合物具有更延伸的构象，因此具有比形成在亲水表面上的导电聚合物更高的导电性（相差约3个数量级）。使用这些程序生成的导电聚合物的最小特征在横向尺寸上类似于2 μ m。这些图案的边缘粗糙度类似于0.5 μ m。这些导电聚合物的图案化微结构是导电的;它们已被用作基于聚合物分散液晶的显示设备中的电极。
This paper describes the use of patterned self-assembled monolayers (SAMs) in area-selective deposition of conducting polymers (polypyrrole and polyaniline) on insulating, hydroxyl-terminated surfaces such as Si/SiO2 and glass. Patterned SAMs of octadecylsiloxane were generated on the hydroxyl-terminated surfaces using microcontact printing; they defined and directed the deposition of conducting polymers. The rate of deposition on the hydrophobic surface is higher than that on the hydrophilic surface: immersion of a substrate patterned with a methyl-terminated SAM in an appropriate aqueous polymerization bath produced a ''positive'' pattern of the conducting polymer on the surface. The conducting polymer deposited on the hydrophobic region of a surface completely covered by the polymer could be readily removed by transferring it to adhesive tape to form a ''positive'' pattern on the tape, leaving a ''negative'' pattern on the surface of the substrate. The conducting polymer deposited on the hydrophobic surface had a more extended conformation, and thus a higher conductivity (approximately 3 orders of magnitude in difference), than that formed on the hydrophilic surface. The smallest features of conducting polymers generated using these procedures were similar to 2 mu m in lateral dimension. The edge roughness of these patterns was similar to 0.5 mu m. These patterned microstructures of conducting polymers were conductive; they have been used as electrodes in display devices based on polymer dispersed liquid crystals.