条形纳米通道中奇特的钠选择性  

The surprising Na^+-selective mechanism in the nano slitpore

作　　者：吴林松[1] 吴锋民[1] 陆杭军[1] 何俊霞[1] 聂雪川[1] 寇建龙[1] 

机构地区：[1]浙江师范大学凝聚态物理研究所,浙江金华321004

出　　处：《浙江师范大学学报（自然科学版）》2011年第3期281-285,共5页Journal of Zhejiang Normal University:Natural Sciences

基　　金：国家自然科学基金资助项目(11005093);浙江省自然科学基金资助项目(Y6100384)

摘　　要：运用分子动力学模拟研究了Na+和K+在4种不同宽度的条形纳米通道中的输运行为,发现由2块单层石墨片构成的条形纳米通道具有一定的钠选择性.当条形纳米通道宽度为0.88 nm时,钠钾离子(Na+/K+)的通透率之比可达到6.但当条形纳米通道的宽度增大时,选择性会逐渐减弱.由于这种管道的结构简单而且能实现很好的离子选择功能,因此在离子分离、海水淡化中有很大的潜在应用.By using molecular simulation,it was studied transportation of ions（Na＋,K＋） through four kinds of nano slitpores with four different widths.It was found that these nano slitpores constructed by two pieces of graphite display Na＋-selectivity.When the width of the slitpore was equal to 0.88 nm,the ion′s transport ratio（Na＋/K＋） reached for six times.However,the selectivity weakened when the distance of the two pieces of graphite became larger.This kind of structure was simple,therefore,the special nano slitpores seemed have wide potential application in ion separation and seawater desolation.

关 键 词：Na+选择性 分子动力学模拟 条形纳米通道 通透率 离子配体 

分 类 号：O352[理学—流体力学]