Poly(pyrrole) versus poly(3,4-ethylenedioxythiophene): amperometric cholesterol biosensor matrices

Date

2009-05-01

Author

Tuerkarslan, Oezlem
Kayahan, Senem
Toppare, Levent Kamil

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Two conducting polymers, poly(pyrrole) (PPy) and poly(3,4-ethylenedioxythiophene) (PEDOT) were used as immobilization matrices for cholesterol oxidase (ChOx). The amperometric responses of the enzyme electrodes were measured by monitoring oxidation current of H2O2 at +0.7 V in the absence of a mediator. Kinetic parameters, such as K (m) and I (max), operational and storage stabilities, effects of pH and temperature were determined for both entrapment supports. K (m) values are found as 7.9 and 1.3 mM for PPy and PEDOT enzyme electrodes, respectively; it can be interpreted that ChOx immobilized in PEDOT shows higher affinity towards the substrate.

Subject Keywords

Electrical and Electronic Engineering, Electrochemistry, General Materials Science, Condensed Matter Physics

URI

https://hdl.handle.net/11511/47106

Journal

JOURNAL OF SOLID STATE ELECTROCHEMISTRY

DOI

https://doi.org/10.1007/s10008-008-0590-7

Collections

Department of Chemistry, Article

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Citation Formats

O. Tuerkarslan, S. Kayahan, and L. K. Toppare, “Poly(pyrrole) versus poly(3,4-ethylenedioxythiophene): amperometric cholesterol biosensor matrices,” JOURNAL OF SOLID STATE ELECTROCHEMISTRY, pp. 657–663, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47106.