Electrochemical epitaxial polymerization of single-molecular wires
Electrochemical epitaxial polymerization of single-molecular wires
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DOI：
10.1038/nmat1176
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发表时间：
2004-08-01
期刊：
影响因子：
41.2
通讯作者：
Gong, H
中科院分区：
文献类型：
--
作者：
Sakaguchi, H;Matsumura, H;Gong, H
有序分子尺度结构的制造是实现高性能分子和共轭聚合物器件的关键。在这里，我们展示了一种独特的单分子加工技术，使用电化学，称为“电化学外延聚合”。该技术是基于通过向也含有碘的单体电解质溶液施加电压脉冲来逐步电聚合单体。使用这种技术，我们观察到形成的高密度阵列的单个共轭聚合物线长达75 nm的表面上的Au（111）电极。我们的研究结果揭示了电聚合的机理，表明共轭聚合物线生长从核吸附在碘覆盖的Au（111）表面。这一结果也可能为基于共轭聚合物的分子级器件的大规模生产打开大门。
The fabrication of organized molecular-scale structures is key to realizing high-performance molecular- and conjugated-polymer devices. Here, we demonstrate a unique single-molecular processing technique using electrochemistry, termed 'electrochemical epitaxial polymerization'. This technique is based on step-by-step electropolymerization of the monomer by applying voltage pulses to a monomer-electrolyte solution that also contains iodine. Using this technique, we observe the formation of high-density arrays of single conjugated-polymer wires as long as 75 nm on the surface of a Au(111) electrode. Our findings unveil the mechanism of electropolymerization, showing that the conjugated polymer wires grow from nuclei adsorbed on the iodine-covered Au( 111) surface. The results may also open the door to mass-production of molecular-scale devices based on conjugated polymers.