Construction of bienzyme biosensors based on combination of the one-step electrodeposition and covalent-coupled sol-gel process |
| |
Authors: | Feng Li Zhen Wang Yan Feng |
| |
Institution: | (1) Dept. Mathematics & Informatics, Vilnius University, Naugarduko 24, LT-03225 Vilnius, Lithuania;(2) Dept. Chemistry & Bioengineering, Vilnius Gediminas Technical University, Sauletekio Ave. 11, LT-10223 Vilnius, Lithuania |
| |
Abstract: | Horseradish peroxidase (HRP) and glucose oxidase (GOD) bienzyme biosensor was constructed by in-situ formation of the organic-inorganic biocomposite film based on the one-step electrodeposition and covalent-coupled sol-gel
process. The electrodeposition was performed in the solution containing functional inorganic precursor possessing the epoxy
groups, γ-glycidoxypropyltrimethoxysiloxane (GPTMS), a biopolymer chitosan (CS), HRP and GOD. The covalent-coupled sol-gel
process was formed by self-hydrolysis and self-condensation of GPTMS, followed by in-situ covalent cross-linking of CS, HRP and GOD through covalent reaction between amino groups and epoxy groups. The developed
bienzyme biosensor presented high stability in acidic solution owing to the covalent-coupled organic-inorganic hybridization.
Compared with the non-hybrid HRP-GOD/CS/Au electrode, the bienzyme biosensor of HRP-GOD/GPTMS/CS/Au showed improved sensitivity
and a wider linear range for the determination of glucose. The linear response of the developed HRP-GOD/GPTMS/CS/Au biosensor
for the determination of glucose ranged from 1 to 351 μmol/L with a detection limit of 0.3 μmol/L. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|