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arXiv 0906.5237cond-mat.mtrl-sci
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石墨烯杨氏模量的分子动力学研究

Young's modulus of Graphene: a molecular dynamics study

Jin-Wu Jiang, Jian-Sheng Wang, Baowen Li

摘要:

通过分子动力学“观察到”的石墨烯中的固有热振动来研究石墨烯的杨氏模量,并且结果与最近的实验相当一致[Science \textbf{321},385(2008)]。该方法进一步应用于石墨烯的杨氏模量:1。随着尺寸的增加而增加,并且在尺寸的阈值之后达到饱和; 2.在[100,500]K范围内,随着温度的升高,温度梯度从0.95 TPa增加到1.1 TPa; 3.在低无序区($< 5%$)对同位素无序不敏感,进一步增加无序百分比后逐渐降低。

英文摘要:

The Young's modulus of graphene is investigated through the intrinsic thermal vibration in graphene which is `observed' by molecular dynamics, and the results agree quite well with the recent experiment [Science \textbf{321}, 385 (2008)]. This method is further applied to show that the Young's modulus of graphene: 1. increases with increasing size and saturation is reached after a threshold value of the size; 2. increases from 0.95 TPa to 1.1 TPa as temperature increases in the region [100, 500]K; 3. is insensitive to the isotopic disorder in the low disorder region ($< 5%$), and decreases gradually after further increasing the disorder percentage.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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