Expanding and Contracting Motions of Carbon Micro-Coils Induced by Alternating Current
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概要
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We studied the movement of carbon micro-coils (CMCs), 4–5 μm in coiling diameter and 1 mm long, which are a new material with a three-dimensional helical/spiral structure, under applied voltage. By applying an alternating voltage of several different frequencies to the CMC, a series of expanding and contracting motions is observed as the electric current passes through. For a clockwise CMC, the expanding motion occurs when the negative amplitude reaches maximum. The contracting motion, i.e., the motion of the CMCs contracting to its original length, occurs at the positive amplitude of the electric current. The counterclockwise CMC acts as the reverse of the motion of the clockwise CMC. The number of expanding and contracting motions for both CMCs increases linearly with the frequency under a constant applied voltage. The amplitude of the motion of CMCs decreases with a higher frequency, and the number of CMC motions increases in proportion to a higher frequency. The electromagnetic power owing to the spiral conformation of the CMC may explain these motions.
- 2006-04-15
著者
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Tsuda Takao
Pico-device Co. Ltd. Nagoya-iko-renkei Incubator
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Motojima Seiji
Faculty Of Engineering Gifu University
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Kato Yuji
Department Of Agricultural Chemistry Faculty Of Agriculture Tohoku University
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Yoshida Tadayoshi
Department of Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
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Tsuda Takao
Pico-Device Co., Ltd., Office 5, Incubation Center, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
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Miwa Hideyuki
Department of Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
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Motojima Seiji
Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
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Kojima Tatsuya
Department of Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa, Nagoya 466-8555, Japan
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