Pulse technique for the electrochemical deposition of polymer films on electrode surfaces.
Pulse technique for the electrochemical deposition of polymer films on electrode surfaces.
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DOI：
10.1016/s0956-5663(97)00086-9
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发表时间：
1997-12
影响因子：
12.6
通讯作者：
W. Schuhmann;Christine Kranz;Heidi Wohlschläger;Johanna Strohmeier
中科院分区：
文献类型：
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作者：
W. Schuhmann;Christine Kranz;Heidi Wohlschläger;Johanna Strohmeier
通常，如果单体上的庞大取代基、中间自由基阳离子的亲核攻击、单体到电极表面的扩散质量传输受阻，则使用恒电位、恒电流或多扫沉积程序在电极表面上电化学诱导沉积导电聚合物膜会失败。具有不同氧化电位的单体的共聚会阻止快速链传播。在合理化限制步骤和电极表面前浓度分布的基础上，发展了一种用于电化学沉积导电聚合物膜的脉冲分布。脉冲沉积法可用于导电聚合物的扫描电化学显微镜局部沉积、吡咯/[Os（2，2 ′-bipyridine）2（3-{吡咯-1-基甲基}吡啶）Cl]+的共聚反应以及酶在聚合物分枝网络中的包埋。
Often, electrochemically-induced deposition of conducting polymer films on electrode surfaces fails using potentiostatic, galvanostatic or multisweep deposition procedures if bulky substituents at the monomer, nucleophilic attack at intermediate radical cations, hindered diffusional mass transport of the monomer to the electrode surface or the copolymerization of monomers with different oxidation potentials prevent fast chain propagation. A pulse profile for the electrochemical deposition of conducting polymer films has been developed based on the rationalization of the limiting steps and the concentration profiles in front of the electrode surface. The pulse deposition method could be advantageously applied for the localized deposition of conducting polymers using scanning electrochemical microscopy, for the copolymerization of pyrrole/[Os(2,2′-bipyridine)2(3-{pyrrole-1-ylmethyl}pyridine)Cl]+and for the entrapment of enzymes within the growing ramified network of the polymer.