| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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A Unified Guide to Two Opposite Size Effects in Nano Elastic Materials |
| TANG Yi-Zhe1,2, ZHENG Zhi-Jun1, XIA Meng-Fen1,3, BAI Yi-Long1 |
| 1State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences, Beijing 1001902Graduate University of Chinese Academy of Sciences, Beijing 1000493Department of Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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TANG Yi-Zhe, ZHENG Zhi-Jun, XIA Meng-Fen et al 2009 Chin. Phys. Lett. 26 126201 |
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Abstract The microstructural variation near surface of nano elastic materials is analyzed based on different potentials. The atomic/molecular mechanism underlying the variation and its effect on elastic modulus are such that the nature of long-range interactions (attractive or repulsive) in the atomic/molecular potentials essentially governs the variation near surface (looser or tighter) and results in two opposite size effects (decreasing or increasing modulus) with decreasing size.
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| Keywords:
62.25.-g
68.35.B-
68.35.Gy
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Received: 26 April 2009
Published: 27 November 2009
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| PACS: |
62.25.-g
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(Mechanical properties of nanoscale systems)
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68.35.B-
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(Structure of clean surfaces (and surface reconstruction))
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68.35.Gy
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(Mechanical properties; surface strains)
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