• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Nanotechnology >Selective ion-permeation through strained and charged graphene membranes
【24h】

Selective ion-permeation through strained and charged graphene membranes

机译：通过应变和带电的石墨烯膜选择性离子渗透

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

By means of molecular dynamics simulations and density functional theory calculations, we demonstrate that stretched and charged graphene can act as ion sieve membranes. It is observed that loading 30% strain on graphene can induce pores in the dense electron cloud to allow ions to pass through the aromatic rings. Meanwhile, a charged surface is helpful to peel the hydration layers from the ions and decrease the energy barrier for ion translocation through nanopores. Our results suggest that with a membrane charge density of 6.80 e nm(-2), Li+ can be highly purified from the mixed solution including Li+, K+, Na+ and Cl- ions. Further increasing the charge density to 15.78 e nm(-2) can obtain excellent Na+/K+ selectivity. The potential of mean force profiles of ion permeation reveal that the potential for each ion is quite different. By fine tuning membrane charge density, pristine monolayer graphene can act as ion sieves with both high permeability and high selectivity.
机译：通过分子动力学模拟和密度函数理论计算，我们证明拉伸和带电的石墨烯可以充当离子筛膜。 观察到将30％的石墨烯菌株负载可以诱导致密电子云中的孔，以允许离子通过芳环。 同时，带电表面有助于从离子剥离水合层并通过纳米孔降低离子易位的能量屏障。 我们的研究结果表明，膜充电密度为6.80 e nm（-2），Li +可以从包含Li +，K +，Na +和Clions的混合溶液中高度纯化。 进一步增加电荷密度至15.78 e nm（-2）可以获得优异的Na + / k +选择性。 离子渗透的平均力谱的潜力揭示了每种离子的电位都是完全不同的。 通过微调膜充电密度，原始单层石墨烯可以用作离子筛，具有高渗透性和高选择性。

著录项

  • 来源
    《Nanotechnology》 |2018年第3期|共8页
  • 作者

    Li Kun; Tao Yi; Li Zhongwu; Sha Jingjie; Chen Yunfei;

  • 作者单位

    Southeast Univ Sch Mech Engn Jiangsu Key Lab Design &

    Manufacture Micronano Bi Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Mech Engn Jiangsu Key Lab Design &

    Manufacture Micronano Bi Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Mech Engn Jiangsu Key Lab Design &

    Manufacture Micronano Bi Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Mech Engn Jiangsu Key Lab Design &

    Manufacture Micronano Bi Nanjing 211189 Jiangsu Peoples R China;

    Southeast Univ Sch Mech Engn Jiangsu Key Lab Design &

    Manufacture Micronano Bi Nanjing 211189 Jiangsu Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    nanopore; ion selectivity; graphene;

    机译：纳米孔;离子选择性;石墨烯;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号