Fabrication of entangled single-wall carbon nanotube films as nanoporous junctions for ion concentration polarization. (16th February 2015)

• Record Type: Journal Article
• Authors: Kim, Bumjoo; Heo, Joonseong; Kwon, Hyukjin J.; Kim, Intae; An, Taechang; Lim, Geunbae
• Is Part Of: Japanese journal of applied physics. Volume 54:Number 3(2015:Mar.)
• Publication Date: 2015-02-16
• Subjects: Physics -- Periodicals; 621.05
• DOI: 10.7567/JJAP.54.035102
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: Ion concentration polarization (ICP) is a distinctive electrochemical phenomenon that occurs near an ion-exchange membrane with an applied DC electric field, generating a significant concentration gradient in back and forth on the membrane. To date, however, there have been only a few attempts to introduce unconventional materials for ion transport in micro–nanofluidic systems. Here, we describe the development of a novel ICP system using an entangled single-wall carbon nanotube (SWNT) film as an ion-selective membrane instead of a Nafion membrane, for investigating the detailed relationship between electrical properties, i.e., ionic conductance through nanojunctions, and nonlinear electrokinetic behavior.