title: Single-step electrochemical functionalization of double-walled carbon nanotube (DWCNT) membranes and the demonstration of ionic rectification.
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.
authors.affiliation: Department of Chemistry, University of Kentucky, Lexington, KY 40506, USA. bjhinds@engr.uky.edu.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhan
authors.forename: Ji
authors.initials: J
authors.lastname: Wu
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Chen
authors.forename: Bruce J
authors.initials: BJ
authors.lastname: Hinds