Individually Addressable Crystalline Conducting Polymer Nanowires in a Microelectrode Sensor Array
Resource
Nanotechnology,18.
Journal
Nanotechnology
Pages
424021
Date Issued
2007-11
Date
2007-11
Author(s)
Wang, Yanju
Coti, Karla K
Wang, Jun
Alam, Maksudul M.
Shyue, Jing-Jong
Lu, Weixing
Padture, Nitin P.
Tseng, Hsian-Rong
Abstract
An efficient, site-specific and scalable approach has been developed to produce high-quality and individually addressable conducting polymer nanowire electrode junctions (CPNEJs) in a parallel-oriented array. Polypyrrole and PEDOT conducting polymer nanowires (CPNWs) with uniform diameters (ca. 60-150 nm) were introduced into the desired electrode junctions in a precise manner by performing a three-step constant-current electrochemical process at a low current density and a low concentration of monomers. A low scan rate, cyclic voltammetric method was also employed and gave similar results. These CPNEJ arrays function as a miniaturized sensor for the parallel and real-time detection of gas and organic vapour. The electrochemical approaches utilized allow the conducting polymer chains to self-organize in the CPNWs to form novel polycrystalline structures, observed by high resolution TEM. The weak diffraction rings at 4.88 Å and 4.60 Å were observed for PEDOT and polypyrrole CPNWs, respectively.
SDGs
Type
journal article