Electrochemically Triggered Surface Deposition of Polyelectrolytes.
Electrochemically Triggered Surface Deposition of Polyelectrolytes.
复制标题
电化学触发聚电解质的表面沉积。
作者：
M. S. Iqbal;Wei Zhan
提出了一种在自组装单分子膜表面沉积聚电解质的电化学方法。这种沉积过程可以很容易地被电位偏置触发，它将自组装单分子膜中的二茂铁部分氧化成二茂铁，其电荷补偿通过聚电解质和相关的反离子来实现。这种方法非常通用，可以定量沉积具有广泛化学特性(合成聚合物、多肽和DNA)和分子量(测试时为103-107Da)的聚阴离子和聚阳离子。传统的逐层聚电解质沉积可以直接与这种方法相结合来制备电活性聚合物薄膜。采用伏安法、荧光光谱、接触角分析、电化学石英晶体微天平、原子力显微镜等技术对沉积过程进行了表征。并对有关沉积机理进行了详细的讨论。
An electrochemical approach to surface deposition of polyelectrolytes on self-assembled monolayers is presented. This deposition process can be triggered facilely by a potential bias, which oxidizes ferrocene moieties included in the self-assembled monolayer to ferrocenium, whose charge compensation is fulfilled by polyelectrolytes and associated counterions. This approach is quite general, affording quantitative deposition of both polyanions and polycations with a wide range of chemical identities (synthetic polymers, peptides, and DNA) and molecular weights (103-107 Da as tested). Conventional layer-by-layer polyelectrolyte deposition can be straightforwardly combined with this method to produce electroactive polymer films. Several techniques, including voltammetry, fluorescence spectroscopy, contact angle analysis, electrochemical quartz crystal microbalance, and atomic force microscopy, were employed to characterize the deposition processes. A detailed discussion on the involved deposition mechanisms is also presented.
影响因子：
20.6
作者：
Eckermann AL;Feld DJ;Shaw JA;Meade TJ
通讯作者：
Meade TJ