径向电场对纳米管中水分子通量的影响

引用本文: 葛振朋, 石彦超, 李晓毅. 径向电场对纳米管中水分子通量的影响[J]. 物理化学学报, 2013, 29(08): 1655-1660. doi: 10.3866/PKU.WHXB201305222 shu

Citation: GE Zhen-Peng, SHI Yan-Chao, LI Xiao-Yi. Effects of Ortho nal Electric Field on Water Flux through a Carbon Nanotube[J]. Acta Physico-Chimica Sinica, 2013, 29(08): 1655-1660. doi: 10.3866/PKU.WHXB201305222 shu

径向电场对纳米管中水分子通量的影响

基金项目:
国家自然科学基金(21274164, 21144001) (21274164, 21144001)

国家重点基础研究发展规划项目(973) (2012CB934001)资助 (973) (2012CB934001)

摘要:

水分子在纳米通道中的运动对于生命活动、纳米器件的设计等都有着重要的意义. 现在已经证实, 在(6,6)的碳纳米管中, 水分子会以单分子水链的形式协同通过碳纳米管. 但是如何控制水分子的流量仍然是一个困难的课题. 本文研究了在径向电场作用下, 碳纳米管中水分子通量的变化趋势和碳纳米管的开关行为.发现在碳纳米管两端存在200 MPa的压力差时, 电场强度从1 V·nm^-1增加到3 V·nm^-1, 水分子通量线性减小. 当径向电场强度增加到3 V·nm^-1时, 碳纳米管处于关闭状态, 水分子无法通过碳纳米管. 进一步, 我们发现水偶极与碳纳米管管轴夹角的平均值的概率分布和翻转频率都与水分子在纳米管中的个数有很大关系.

关键词:

English

Effects of Ortho nal Electric Field on Water Flux through a Carbon Nanotube

1.
College of Materials Science and Opto-electronics Technology, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
Received Date: 26 February 2013
Available Online: 09 July 2013
Fund Project:
国家自然科学基金(21274164, 21144001)

国家重点基础研究发展规划项目(973) (2012CB934001)资助

Abstract:

Water transport in nanopores is important for many biological processes and the design of nanodevices. It has been demonstrated that water molecules are transported through a (6,6)-type carbon nanotube (CNT) by forming single-file chains. However, a controllable water flow through a CNT remains difficult to achieve. In this paper, we investigated how to control the net flux of water molecules transported through a CNT and the on-off gating behavior of the CNT using an ortho nal electric field. With a 200 MPa pressure difference acting on the top of the first layer of water molecules as the driving force, the net flux of water molecules decreased linearly as the ortho nal electric field strength (E) increased from 1 to 3 V· nm^-1. When E increased over 3 V·nm^-1, the flow of water molecules through the CNT was turned off and the net flux was almost zero. Both the orientation of water dipoles and flipping frequency were strongly correlated with the water occupancy in this case.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

径向电场对纳米管中水分子通量的影响

English

Effects of Ortho nal Electric Field on Water Flux through a Carbon Nanotube

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

径向电场对纳米管中水分子通量的影响

English

Effects of Ortho nal Electric Field on Water Flux through a Carbon Nanotube

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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