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 Chin. Phys. B, 2010, Vol. 19(6): 066101    DOI: 10.1088/1674-1056/19/6/066101
 CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next

# Direct transition of potential of water droplets to electric energy using aligned single-walled carbon nanotubes

Zheng Kai-Honga, Hu Li-Juna, Sun Lian-Fenga, Liu Jib, Liu Zhengb
a National Center for Nanoscience and Technology, Beijing 100190, China; b National Center for Nanoscience and Technology, Beijing 100190, China;Graduate School of the Chinese Academy of Sciences, Beijing 100049, China
Abstract  In this paper, we report that an electromotive force (EMF) can be induced in a rope of aligned single-walled carbon nanotubes (SWNTs) when water droplets fall on this rope. The magnitude of this EMF depends sensitively on the slant angle of the SWNTs. Most interestingly, both the magnitude and the direction of the induced EFM can be modulated by applying a current to the SWNTs. The concepts of electrical slip and no-slip are proposed and can be quantitatively described by electrical slip resistance''. This kind of generator does not need any magnet, rotor, {etc} and shows quite a different operating mechanism and design compared with a conventional large scale hydroelectric power generator.
Received:  19 October 2009      Published:  15 June 2010
 PACS: 85.35.Kt (Nanotube devices) 61.48.-c (Structure of fullerenes and related hollow and planar molecular structures) 84.60.-h (Direct energy conversion and storage)
Fund: Project supported by the National Basic Research Program of China (Grant No.~2006CB932402) and the National Natural Science Foundation of China (Grant Nos.~50702015, 10574034, and 10774032).