Journal
ANALYTICA CHIMICA ACTA
Volume 597, Issue 1, Pages 151-156Publisher
ELSEVIER
DOI: 10.1016/j.aca.2007.06.034
Keywords
mesoporous; ordered; lyotropic liquid crystalline; biosensor
Categories
Ask authors/readers for more resources
Ordered mesoporous polyaniline film has been fabricated by electrodepositing from the hexagonal lyotropic liquid crystalline (LCC). Horseradish peroxidase (HRP), as a symbol biomolecule, was successfully immobilized on the film to construct a new kind of hydrogen peroxide biosensor. The biosensor combined the advantages of the good conductivity of polyaniline and the higher surface area of the ordered mesoporous film. Polyaniline could be served as a wire to relay electron between HRP and the electrode. The high surface area of the film supplied more sites for HRP immobilization, therefore increased the catalytic activity of the biosensor. The ordered mesoporous character of the film increased the rate of mass transport, which resulted in the improvement of sensor response and linearity. The biosensor displayed excellent electrocatalytic response to the detection of H2O2 in a concentration range from 1.0 mu M to 2.0 mM with a detection limit of 0.63 mu M. Good reproducibility, stability, high precision, wide linearity and low detection limit were assessed for the biosensor. (c) 2007 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available