The effect of lateral vibrations on transport and friction in nanoscale contacts |
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Authors: | Z. Tshiprut A.E. Filippov M. Urbakh |
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Affiliation: | aSchool of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel;bDonetsk Institute for Physics and Engineering of NASU, 83144, Donetsk, Ukraine |
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Abstract: | We demonstrate that lateral vibrations of a substrate can dramatically increase surface diffusivity and mobility and reduce friction at the nanoscale. In contrast to the enhancement of diffusion and mobility that has a resonance nature, the reduction of friction does not exhibit pronounce resonance features. We find an abrupt dilatancy transition from the state with a small tip–surface separation to the state with a large separation as the vibration frequency increases. Dilatancy is shown to play an essential role in dynamics of a nanometer-size tip which interacts with a vibrating surface. Atomic force microscopy (AFM) experiments are suggested which can test the predicted effects. |
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Keywords: | Diffusion Friction Control of friction Stick– slip motion |
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