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单壁碳纳米管:纳米发电机和纳米马达
Single-walled carbon nanotubes: nano-generators and nano-motors
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摘要: 简要回顾了单壁碳纳米管的发现及研究现状,介绍了一种新颖的悬空单壁碳纳米管的制备方法;在此基础上,通过新的一种四电极方法,用实验证明水分子可以进入两端开口的单壁碳纳米管内,由于水分子偶极子与碳纳米管中载流子的相互产生相互耦合作用,载流子的定向运动(电流)可以使水产生定向运动(纳米马达);同时,水的运动又会使碳纳米管中的载流子产生定向运动而产生一个电动势(纳米发电机).Abstract: The discovery and recent studies of single-walled carbon nanotubes (SWNTs) are briefly reviewed i and our work on a new technique to fabricate an individual suspended SWNT device with open ends is described in detail. Based on this kind of device, we have demonstrated experimentally that water molecules can enter into the hydrophobic inner channel of an SWNT. Because of the interaction and coupling of water dipoles with the carriers in the SWNT, a current can drive the directional motion of the water molecules inside the SWNT (nanomotor). Meanwhile, this motion can induce an electromotive force along the SWNT (nanogenerator). Thus, a water-filled SWNT can be used as both a nano-motor and a nano-generator.
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