Journal
ELECTROANALYSIS
Volume 25, Issue 2, Pages 367-372Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201200591
Keywords
ZnO nanowalls; Potentiometric nanosensors; Cholesterol oxidase; Cholesterol; Stabilized lipid films
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A novel potentiometric cholesterol biosensor was fabricated by immobilization of cholesterol oxidase into stabilized lipid films using zinc oxide (ZnO) nanowalls as measuring electrode. Cholesterol oxidase was incorporated into the lipid film prior polymerization on the surface of ZnO nanowalls resulting in a sensitive, selective, stable and reproducible cholesterol biosensor. The potentiometric response was 57mV/ decade concentration. The sensor response had no interferences by normal concentrations of ascorbic acid, glucose, and urea, proteins and lipids. The present biosensor could be implanted in the human body because of the biocompatibility of the lipid film.
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