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首页> 外文期刊>Physica status solidi, B. Basic research >In-situ Vis/NIR spectroelectrochemistry of single-walled carbon nanotubes enriched with (6,5) tubes
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In-situ Vis/NIR spectroelectrochemistry of single-walled carbon nanotubes enriched with (6,5) tubes

机译：富含（6,5）管的单壁碳纳米管的原位Vis / NIR光谱电化学

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An in-situ optical Vis/NIR spectroelectrochemistry study was performed on single-walled carbon nanotubes (CoMoCat) enriched with (6,5) tubes via density-gradient ultracentrifugation. Thin semitransparent solid films were prepared from the solution of sorted nanotubes by vacuum filtration and purification with water. Despite the appearance of some bundling of the nanotubes during this procedure, peaks corresponding to optical transitions of tubes with distinct chiralities may be observed in the spectra. The effects of electrochemical redox doping on the electronic state of the nanotubes were investigated in an electrode potential window between -2 and +1.7 V vs. Ag-pseudoreference electrode. The bleaching of Delta E-11(S) and Delta E-22(S) optical transitions is traced for particular tubes, which allows a partial quantification of changes in the electronic density of states (DOS) caused by their filling with electrons or holes. (C) 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
机译：通过密度梯度超速离心对富含（6,5）管的单壁碳纳米管（CoMoCat）进行了原位光学Vis / NIR光谱电化学研究。由分选的纳米管溶液通过真空过滤和用水纯化来制备薄的半透明固体膜。尽管在此过程中出现了纳米管的一些束缚，但仍可在光谱中观察到与具有不同手性的管的光学跃迁相对应的峰。相对于Ag-伪参比电极，在-2和+1.7 V之间的电极电势窗口中研究了电化学氧化还原掺杂对纳米管电子状态的影响。对于特定的电子管，跟踪了Delta E-11（S）和Delta E-22（S）光学跃迁的漂白，从而可以部分量化由于其填充电子或空穴而引起的态电子密度（DOS）的变化。 。 （C）2008 WILEY-VCH Verlag GmbH＆Co.KGaA，Weinheim

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