Single-step electrochemical functionalization of double-walled carbon nanotube (DWCNT) membranes and the demonstration of ionic rectification

Authors

Xin Zhan, University of KentuckyFollow
Ji Wu, University of KentuckyFollow
Zhiqiang Chen, University of KentuckyFollow
Bruce J. Hinds, University of KentuckyFollow

Abstract

Carbon nanotube (CNT) membranes allow the mimicking of natural ion channels for applications in drug delivery and chemical separation. Double-walled carbon nanotube membranes were simply functionalized with dye in a single step instead of the previous two-step functionalization. Non-faradic electrochemical impedance spectra indicated that the functionalized gatekeeper by single-step modification can be actuated to mimic the protein channel under bias. This functional chemistry was proven by a highly efficient ion rectification, wherein the highest experimental rectification factor of ferricyanide was up to 14.4. One-step functionalization by electrooxidation of amine provides a simple and promising functionalization chemistry for the application of CNT membranes.

Document Type

Article

Publication Date

6-10-2013

Notes/Citation Information

Published in Nanoscale Research Letters, v. 8, no. 279.

© 2013 Zhan et al.; licensee Springer.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Digital Object Identifier (DOI)

http://dx.doi.org/10.1186/1556-276X-8-279

Repository Citation

Zhan, Xin; Wu, Ji; Chen, Zhiqiang; and Hinds, Bruce J., "Single-step electrochemical functionalization of double-walled carbon nanotube (DWCNT) membranes and the demonstration of ionic rectification" (2013). Chemistry Faculty Publications. 7.
https://uknowledge.uky.edu/chemistry_facpub/7