Simultaneous Dielectrophoretic Separation and Assembly of Single-Walled Carbon Nanotubes on Multigap Nanoelectrodes and Their Thermal Sensing Properties

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• 作者：Zhuo Chen ; Zhongyun Wu ; Lianming Tong ; Huapu Pan ; Zhongfan Liu
• 刊名：Analytical Chemistry
• 出版年：2006
• 出版时间：December 1, 2006
• 年：2006
• 卷：78
• 期：23
• 页码：8069 - 8075
• 全文大小：423K
• 年卷期：v.78,no.23(December 1, 2006)
• ISSN：1520-6882

文摘

By using the specifically designed multigap nanoelectrodes, we demonstrated an effective approach for thesimultaneous dielectrophoretic separation and assemblyof metallic and semiconducting single-walled carbonnanotubes (SWNTs). An approximate metallic-semiconducting-metallic multiarray structure was created by aninward-propagative sequential assembly of SWNTs underac electric field. Such kinds of SWNT multiarray structures exhibited ultra-low-power consumption and excellent thermal sensing performances with the sensitivitybeing dependent on the number of gaps: the more gaps,the higher sensitivity. The effective separation of metallicand semiconducting tubes in different gaps is believed tobe responsible for the improved sensitivity to temperature.