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arXiv 0705.3130cond-mat.mtrl-scicond-mat.other
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氢同位素注入石墨烯的分子动力学模拟

Molecular dynamics simulation of hydrogen isotope injection into graphene

Nakamura Hiroaki, Arimichi Takayama, Astushi Ito

摘要:

采用经典分子动力学模拟和改进的Brenner反应经验键级(REBO)势,揭示了反射、吸收和穿透三种化学反应的氢同位素效应.我们发现π电子的反射与入射同位素的质量无关,但原子核的反射峰向入射能量较高的一侧移动。除了反射之外,我们还发现,随着入射同位素的质量变大,石墨烯的正z侧的吸收比变大。另一方面,石墨烯的负z侧的吸收比变小。最后,我们发现穿透率不依赖于入射同位素的质量,因为石墨烯势不受质量的影响。

英文摘要:

We reveal the hydrogen isotope effect of three chemical reactions, i.e, the reflection, the absorption and the penetration ratios, by classical molecular dynamics simulation with a modified Brenner's reactive empirical bond order (REBO) potential potential. We find that the reflection by pi-electron does not depend on the mass of the incident isotope, but the peak of the reflection by nuclear moves to higher side of incident energy. In addition to the reflection, we also find that the absorption ratio in the positive z side of the graphene becomes larger, as the mass of the incident isotope becomes larger. On the other hand, the absorption ratio in the negative z side of the graphene becomes smaller. Last, it is found that the penetration ratio does not depend on the mass of the incident isotope because the graphene potential is not affected by the mass.

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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