Bioelectrocatalytic current based on direct heterogeneous electron transfer reaction of glucose oxidase adsorbed onto multi-walled carbon nanotubes synthesized on platinum electrode surfaces

• Published in: Electrochemistry communications Vol. 10; no. 6; pp. 888 - 890
• Main Authors: Tominaga, Masato, Nomura, Shinya, Taniguchi, Isao
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01-06-2008; Amsterdam Elsevier Science; New York, NY
• Subjects: Biological and medical sciences; Carbon nanotube; Catalytic current; Electrochemistry; Electron transfer reaction; Fundamental and applied biological sciences. Psychology; Glucose oxidase; Molecular biophysics; Physical chemistry in biology; Carbon nanotube; Glucose oxidase; Catalytic current; Electron transfer reaction; Phosphates; Enzyme; Bioelectrochemistry; Carbon nanotubes; Electron transfer; Enzymatic catalysis; Transition metal; Buffer solution; Electrodes; Electrocatalysis; Inorganic anion; Glucose oxidase;Electron transfer reaction;Catalytic current;Carbon nanotube; Multiwalled nanotube; Platinum; Oxidoreductases; Modified material
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2008.04.011

Multi-walled carbon nanotubes (MWCNTs) were synthesized on platinum plate electrodes by the chemical vapor deposition (CVD) method. The MWCNTs synthesized on the Pt plate (MWCNTs/Pt) electrode were immediately immersed into solutions of glucose oxidase (GOX) to immobilize these enzymes onto the MWCNTs/Pt electrode surfaces. After the GOX was immobilized onto the MWCNTs/Pt electrode, a well-defined catalytic oxidation current was increased from
ca. −0.45
V (vs. Ag/AgCl/saturated KCl), which was close to the redox potential of flavin adenine dinucleotide (FAD) as a prosthetic group of GOX under physiological pH values.