碳纳米管复合的电化学刺激响应多层膜
Electrochemical-stimuli multilayers based on ferrocene and carbon nanotubes
基于电化学为刺激响应手段的功能化界面设计是当前智能界面研究的热点之一。本课题研究利用二茂铁修饰的聚乙烯亚胺为功能聚合物，对碳纳米管进行修饰，得到具有良好稳定性的碳纳米管溶液。进一步将功能化修饰的碳纳米管与DNA，通过静电力进行层层组装，得到具有电化学活性的多层膜。研究结果表明，多层膜中的二茂铁基团，在电化学作用下，能够原位氧化还原反应，从不带电的还原态转变带电的氧化态。由此，多层膜发生显著的溶胀，导致多层膜界面的硬度下降。该多层膜体系具有电刺激响应的界面硬度变化，能够潜在地作为功能调控界面。
In this paper, we have developed an electro-active film with controlled stiffness. The carbon nanotubes were firstly functionalized with ferrocene-grafted polyethylenimine (PEI-Fc). It was then deposited with DNA through the layer-by-layer assembly technique. Upon the oxidation electrical potential, the ferrocene groups were switched from reduction state to oxidation state, leading to change of microenvironments' charge density, resulting in swelling of the multilayers and decreasing of surface stiffness. We believe in that electrochemical control over the swelling behavior of multilayers could have important implications for responsive coatings of nanoscale devices.
计剑、孙一新、任科峰
电化学工业高分子化合物工业电工材料
高分子材料层状组装膜硬度碳纳米管二茂铁电化学刺激响应
Macromolecular materialsmultilayer filmsstiffnesscarbon nanotubesferroceneelectrochemical stimuli
计剑,孙一新,任科峰.碳纳米管复合的电化学刺激响应多层膜[EB/OL].(2015-01-12)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201501-190.点此复制
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