Sliding Friction of Kr Films Adsorbed on Graphite
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概要
- 論文の詳細を見る
We have carried out quartz crystal microbalance (QCM) experiments for Kr films adsorbed on exfoliated graphite from a single crystal, and have examined the coverage dependence of the sliding friction and the depinning transition up to the bilayer film. For the monolayer film, the coupled mass density appears at the commensurate and fluid (C+F) phase. An increase of this density starts at the commensurate (C) phase and continues at the incommensurate (IC) phase after the C–IC transition. It was found that the monolayer film slides not uniformly but partly on the substrate, and that the slip time is 60 ns at the C phase. On the other hand, the film around the layer completion slides almost uniformly, and its slip time is about 10 ns. For the bilayer film, the experimental data are reasonably explained by a model in which the slip occurs at the boundary between the first and second atomic layers, in addition to the boundary between the film and the substrate. For the oscillation amplitude sweep at a constant coverage, a rapid change in frequency was observed for the monolayer and bilayer films, which is attributed to the depinning transition. This magnitude takes the minimum value around the layer completion.
- Physical Society of Japanの論文
- 2010-01-15
著者
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Suzuki Masaru
Department Of Applied Physics And Chemistry The University Of Electro-communications
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Miura Kouji
Department Of Physics Aichi University Of Education
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Arakawa Ichiro
Department Of Partial And Complete Denture School Of Life Dentistry At Tokyo The Nippon Dental Unive
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Kobayashi Hajime
Department Of Agricultural Information Science Faculty Of Agriculture Tottori University
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Taniguchi Junko
Department Of Applied Physics And Chemistry University Of Electro-communications
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Kobayashi Hajime
Department of Applied Physics and Chemistry, University of Electro-Communications, Chofu, Tokyo 182-8585, Japan
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