MIPs logo MIPdatabase      MIP2020 Conference logo Use this space
Custom Search
Reference type: Conference Proceeding
Authors: Liu Y, Lynch J
Publication date: 2011
Article title: The development of chloride ion selective polypyrrole thin film on a layer-by-layer carbon nanotube working electrode.
Page numbers: Art. No. 798315
DOI: 10.1117/12.880063

Editors: Wu HF
Volume number: 7983
Conference information: Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2011

Abstract: A chloride ion selective thin film sensor is proposed for measuring chloride ion concentration, which is an environmental parameter correlated to corrosion. In this work, electrochemical polymerization of Polypyrrole (PPy) doped with chloride ions was achieved on the top of a carbon nanotube (CNT) thin film as a working electrode in an electrochemical cell. The underlying CNT layer conjugated with doped PPy thin film can form a multifunctional "selfsensing" material platform for chloride ion detection in a concrete environment. The paper presents the first type of work using CNT and PPy as hybrid materials for chloride ion sensing. Electrochemical polymerization of PPy results in oxidation that yields an average of one positive charge distributed over four pyrrole units. This positive charge is compensated by negatively-charged chloride ions in the supporting electrolyte. In effect, the chloride ion-doped PPy has become molecularly imprinted with chloride ions thereby providing it with some degree of perm-selectivity for chloride ions. The detection limit of the fabricated chloride ion-doped PPy thin film can reach 10-8 M and selectivity coefficients are comparable to those in the literature. The reported work aims to lay a strong foundation for detecting chloride ion concentrations in the concrete environment.
Template and target information: chloride ion, Cl-
Author keywords: Ion-selective electrode (ISE), polypyrrole, molecular imprinting, conducting polymers, Layer-by-layer, carbon nanotubes (CNT)

  Holmium periodic table mug  Scientist peptide mug  I shop perodically customisable tote bag

Molecules Special Issue call      Appeal for information


Join the Society for Molecular Imprinting
Logo of the Society for Molecular Imprinting

New items RSS feed
new items RSS feed  View latest updates

Sign-up for e-mail updates:
Choose between receiving an occasional newsletter or more frequent e-mail alerts.
Click here to go to the sign-up page.

Is your name elemental or peptidic? Enter your name and find out by clicking either of the buttons below!
Other products you may like:
view listings for MIP books on eBay:

Mickey Mouse 90th Anniversary banner