介电泳
碳纳米管
材料科学
微电极
拉曼光谱
金属
电介质
悬挂(拓扑)
溶剂
电场
纳米技术
碳纤维
分析化学(期刊)
化学工程
光电子学
电极
复合材料
化学
光学
有机化学
物理化学
纯数学
冶金
物理
工程类
同伦
复合数
量子力学
数学
微流控
作者
Ralph Krupke,Frank Hennrich,Hilbert von Löhneysen,Manfred M. Kappes
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2003-07-18
卷期号:301 (5631): 344-347
被引量:1423
标识
DOI:10.1126/science.1086534
摘要
We have developed a method to separate metallic from semiconducting single-walled carbon nanotubes from suspension using alternating current dielectrophoresis. Our method takes advantage of the difference of the relative dielectric constants of the two species with respect to the solvent, resulting in an opposite movement of metallic and semiconducting tubes along the electric field gradient. Metallic tubes are attracted toward a microelectrode array, leaving semiconducting tubes in the solvent. Proof of the effectiveness of separation is given by a comparative Raman spectroscopy study on the dielectrophoretically deposited tubes and on a reference sample.
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