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An amperometric glucose biosensor with enhanced measurement stability and sensitivity using an artificially porous conducting polymer
journal contribution
posted on 2017-12-06, 00:00 authored by E Mala Ekanayake, Daluwathu PreethichandraDaluwathu Preethichandra, K KanetoA conducting polymer [polypyrrole (PPy)]-based amperometric biosensor fabricated on a platinum-coated nanoporous alumina electrode has been described. This fabricating process introduced artificial porosity into the PPy film, and the template pore sizes were carefully chosen to match the size of the glucose oxidase (GOx) molecule. The PF−6 -doped PPy film was synthesized with 0.05 M pyrrole and 0.1 M NaPF6 at a current density of 0.3 mA/cm2 for 90 s. Immobilization was done by physically adsorbing 5 μL of GOx on the nanoporous PPy film. Glutaraldehyde (0.1 wt.%, 5 μL) was used for cross-linking. The synthesized films were characterized by using an electrochemical technique and scanning electron microscopy (SEM). Amperometric responses were measured as a function of different concentrations of glucose at 0.4 V. Nanoporous electrodes lead to high enzyme loading, whereas the use of a cross-linking agent increased stability, sensitivity, reproducibility, repeatability, and shelf life.
Funding
Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)
History
Volume
57Issue
8Start Page
1621End Page
1626Number of Pages
6ISSN
1557-9662Location
United StatesPublisher
IEEEPublisher DOI
Full Text URL
Language
en-ausPeer Reviewed
- Yes
Open Access
- No
External Author Affiliations
Kyūshū Kōgyō Daigaku;Era Eligible
- Yes