Galactose oxidase;
Graphene;
Gold nanoparticles;
Direct electron transfer;
Biosensor;
DIRECT ELECTRON-TRANSFER;
ELECTROCHEMICAL-BEHAVIOR;
ENZYME ELECTRODE;
CARBON;
ELECTROCATALYSIS;
NANOPARTICLES;
MEDIATOR;
SENSORS;
D O I:
10.1002/elan.201500486
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
A novel amperometric biosensor was developed by immobilizing galactose oxidase (GAox) on poly (L-lactide) stabilized gold nanoparticles (Au@PLLA) modified graphene nano-composite film (RGO-Au@PLLA/GAox). The direct electron transfer (DET) of GAox was achieved. Cyclic voltammetry of the GAox in the RGO-Au@PLLA film revealed a pair of well-defined and quasireversible peaks at about -0.137V (vs. SCE), which is characterized of the Cu(II)/Cu(I) redox couple for the galactose oxidase. Amperometric response was measured as a function for the determination of galactose (GA) and dihydroxyacetone (DHA). The constructed biosensor also possesses good stability, reproducibility and anti-interference ability.
机构:
Fatih Univ, Dept Genet & Bioengn, Fac Engn, TR-34500 Istanbul, TurkeyFatih Univ, Dept Genet & Bioengn, Fac Engn, TR-34500 Istanbul, Turkey
Cevik, Emre
Senel, Mehmet
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机构:
Fatih Univ, Fac Arts & Sci, Dept Chem, TR-34500 Istanbul, Turkey
Fatih Univ, Bionanotechnol Res Ctr, Biotechnol Res Lab, TR-34500 Istanbul, TurkeyFatih Univ, Dept Genet & Bioengn, Fac Engn, TR-34500 Istanbul, Turkey