Abstract
A kind of electroactive nanoparticles (NPs) was prepared in solution by self-assembling amphiphilic 3-thiophenecarboxylic acid-modified starch (TPCA-St), which was synthesized through esterification reaction. By casting TPCA-St NPs on the surface of gold electrode and subsequent electropolymerization of the thiophene moieties in NP film, the electroconductive TPCA-St NP-based film was formed. After horseradish peroxidase and Nafion were sequentially cast on the film surface, a biosensor was successfully prepared. The prepared biosensor showed high sensitivity for H2O2 detection. The linear range from 1 × 10−10 to 1 × 10−5 mol L−1 with a detection limit of 3 × 10−11 mol L−1 was obtained for H2O2 sensing. The biosensor also showed good repeatability and stability, and it has been successfully used to sense H2O2 in commercial disinfector with satisfactory results.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call