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硝基甲烷在石墨烯表面的结构排布特征
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(西安近代化学研究所氟氮化工资源高效开发与利用国家重点实验室, 陕西 西安 710065)

作者简介:

刘英哲(1986-),男,博士,副研究员,主要从事含能材料计算模拟研究。e-mail: liuyz_204@163.com

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国家自然科学基金资助(21403162,21503160)


Structural Arrangements of Nitromethane on the Graphene Surface
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(State Key Laboratory of Fluorine & Nitrogen Chemicals, Xi′an Modern Chemistry Research Institute, Xi′an 710065, China)

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    摘要:

    采用分子动力学模拟研究了硝基甲烷(NM)在石墨烯(GRA)表面的结构排布特征。结果表明, GRA表面能够诱导NM进行有序地层状排布, 在最接近GRA表面的一层, 有序化程度最高, NM具有特定的排布取向, 即偶极矩矢量平行于GRA表面, 导致NM的排布较为密集, 局域密度高于平均密度。为了能够最大程度与GRA作用, 部分NM从重叠式结构转化为交错式结构。随着NM与GRA距离的增加, GRA对NM结构排布的影响减弱, 从第3层开始, 结构排布已趋于液体NM的无序状态。

    Abstract:

    Molecular dynamics simulations were performed to explore structural arrangements of nitromethane (NM) on the graphene (GRA) surface. The simulation results show that ordered and layered structural arrangements of NM are induced by the GRA surface. In the nearest layer to the GRA surface, the structural ordering is highest. The preferred orientation of NM is found, i.e. the dipole vector is parallel with the GRA surface, leading to more concentrated and higher density than bulk NM. To maximize the interactions between NM and GRA, furthermore, some NM molecules change from eclipsed structure to staggered structure. The influence of GRA on structural arrangements of NM is weakened as the distance between NM and GRA surface increases. The structural arrangements of NM trends toward disordered state of bulk NM started with the third layer.

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引用本文

刘英哲,来蔚鹏,王玉,等.硝基甲烷在石墨烯表面的结构排布特征[J].含能材料, 2016, 24(7):639-643. DOI:10.11943/j. issn.1006-9941.2016.07.003.
LIU Ying-zhe, LAI Wei-peng, WANG Yu, et al. Structural Arrangements of Nitromethane on the Graphene Surface[J]. Chinese Journal of Energetic Materials, 2016, 24(7):639-643. DOI:10.11943/j. issn.1006-9941.2016.07.003.

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历史
  • 收稿日期: 2015-12-29
  • 最后修改日期: 2016-05-14
  • 录用日期: 2016-03-17
  • 在线发布日期: 2016-06-28
  • 出版日期: 2016-07-19