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A Controllable Molecular Sieve for Na+ and K+ Ions
文献类型：期刊论文
| 作者 | Gong XJ (弓晓晶) ; Yang H (杨辉); Xu K (徐科); Wang JF(王建峰)
|
| 刊名 | Journal of the American Chemical Society
 |
| 出版日期 | 2010-02-17 |
| 期号 | 6 |
| 通讯作者 | Gong XJ (弓晓晶) |
| 合作状况 | 其它 |
| 英文摘要 | The selective rate of specific ion transport across nanoporous material is critical to biological and nanofluidic systems Molecular sieves for ions can be achieved by steric and electrical effects However, the radii of Na+ and K+ are quite similar, they both carry a positive charge, making them difficult to separate Biological ionic channels contain precisely arranged arrays of amino acids that can efficiently recognize and guide the passage of K+ or Na+ across the cell membrane However, the design of inorganic channels with novel recognition mechanisms that control the ionic selectivity remains a challenge. We present here a design for a controllable ion-selective nanopore (molecular sieve) based on a single-walled carbon nanotube with specially arranged carbonyl oxygen atoms modified inside the nanopore, which was inspired by the structure of potassium channels in membrane spanning proteins (e g, KcsA) Our molecular dynamics simulations show that the remarkable selectivity is attributed to the hydration structure of Na+ or K+ confined in the nanochannels, which can be precisely tuned by different patterns of the carbonyl oxygen atoms The results also suggest that a confined environment plays a dominant role in the selectivity process. These studies provide a better understanding of the mechanism of ionic selectivity in the KcsA channel and possible technical applications in nanotechnology and biotechnology, including serving as a laboratory-in-nanotube for special chemical interactions and as a high-efficiency nanodevice for purification or desalination of sea and brackish water |
| 收录类别 | SCI ; EI |
| 语种 | 英语 |
| WOS记录号 | WOS:000275085000049 |
| 公开日期 | 2010-12-31 |
| 源URL | [http://58.210.77.100/handle/332007/312]  |
| 专题 | 苏州纳米技术与纳米仿生研究所_测试分析平台 |
| 通讯作者 | Gong XJ (弓晓晶) |
| 推荐引用方式 GB/T 7714 | Gong XJ ,Yang H ,Xu K ,et al. A Controllable Molecular Sieve for Na+ and K+ Ions[J]. Journal of the American Chemical Society,2010(6). |
| APA | Gong XJ ,Yang H ,Xu K ,&Wang JF.(2010).A Controllable Molecular Sieve for Na+ and K+ Ions.Journal of the American Chemical Society(6). |
| MLA | Gong XJ ,et al."A Controllable Molecular Sieve for Na+ and K+ Ions".Journal of the American Chemical Society .6(2010). |
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