IMECH-IR  > 非线性力学国家重点实验室
Ion diffusion coefficient measurements in nanochannels at various concentrations
Wang JR(王俊荣); Zhang L; Xue JM; Hu GQ(胡国庆); Xue, JM (reprint author), Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
Source PublicationBIOMICROFLUIDICS
2014-03
Volume8Issue:2Pages:24118
ISSN1932-1058
AbstractDiffusion is one of the most fundamental properties of ionic transport in solutions. Here, we present experimental studies and theoretical analysis on the ion diffusion in nanochannels. Based on Fick's second law, we develop a current monitoring method to measure ion diffusion coefficient of high solution concentrations in nanochannels. This method is further extended to the cases at medium and low concentrations. Through monitoring ionic current during diffusion, we obtain diffusion coefficients of potassium chloride solution at different concentrations in nanochannels. These diffusion coefficients within the confined space are close to theirs bulk values. It is also found that the apparent ion diffusion equilibrium in the present experiments is very slow at low concentration, which we attribute to the slow equilibrium of the nanochannel surface charge. Finally, we get a primary acknowledge of the equilibrium rate between the nanochannel surface charge and electrolyte solution. The results in this work have improved the understanding of nanoscale diffusion and nanochannel surface charge and may be useful in nanofluidic applications such as ion-selective transport, energy conversion, and nanopore biosensors. (C) 2014 AIP Publishing LLC.
Subject AreaBiochemistry & Molecular Biology ; Biophysics ; Science & Technology - Other Topics ; Physics
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000336082100024
Funding OrganizationThis work was partially supported by MOST (2011CB707604) and NSFC (11272321, 11102214). We also thank the Nanofabrication Facility at Suzhou Institute of Nano-tech and Nano-bionics (SINANO) of Chinese Academy of Science (CAS) for technical support in device fabrication.
DepartmentLNM微纳米流体力学
Classification一类
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/48858
Collection非线性力学国家重点实验室
Corresponding AuthorXue, JM (reprint author), Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China.
Recommended Citation
GB/T 7714
Wang JR,Zhang L,Xue JM,et al. Ion diffusion coefficient measurements in nanochannels at various concentrations[J]. BIOMICROFLUIDICS,2014,8(2):24118.
APA 王俊荣,Zhang L,Xue JM,胡国庆,&Xue, JM .(2014).Ion diffusion coefficient measurements in nanochannels at various concentrations.BIOMICROFLUIDICS,8(2),24118.
MLA 王俊荣,et al."Ion diffusion coefficient measurements in nanochannels at various concentrations".BIOMICROFLUIDICS 8.2(2014):24118.
Files in This Item: Download All
File Name/Size DocType Version Access License
IMCAS-J2014-136.pdf(1512KB) 开放获取--View Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[王俊荣]'s Articles
[Zhang L]'s Articles
[Xue JM]'s Articles
Baidu academic
Similar articles in Baidu academic
[王俊荣]'s Articles
[Zhang L]'s Articles
[Xue JM]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[王俊荣]'s Articles
[Zhang L]'s Articles
[Xue JM]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: IMCAS-J2014-136.pdf
Format: Adobe PDF
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.