Electron-transfer properties of different carbon nanotube materials, and their use in glucose biosensors.
Different types of carbon nanotube material (single-walled carbon nanotubes (SWCNTs) and multi-walled carbon nanotubes (MWCNTs) of different internal diameter) have been used for preparation of CNT-modified glassy-carbon electrodes. Redox reactions involving ferricyanide and hydrogen peroxide were examined at the CNT-modified electrodes. Electrodes modified with SWCNTs usually had better electron-transfer properties than MWCNT-modified electrodes. Glucose biosensors were also prepared with electropolymerized polyphenylenediamine films, CNT materials, and glucose oxidase. Amperometric behavior in glucose determination was examined. SWCNT-modified glucose biosensors usually had a wider dynamic range (from 0.1 to 5.5 mmol L-1) and greater sensitivity in glucose determination. The detection limit was estimated to be 0.05 mmol L-1.
Yao
Yanli
Y
Department of Chemistry, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong SAR, People's Republic of China.
Shiu
Kwok-Keung
KK
D015374:Biosensing Techniques / Q000379:methods*; D002384:Catalysis; D004553:Electric Conductivity; D004563:Electrochemistry; D004566:Electrodes; D005292:Ferricyanides / Q000737:chemistry; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D005949:Glucose Oxidase / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010084:Oxidation-Reduction; D010655:Phenylenediamines / Q000737:chemistry; D015203:Reproducibility of Results
D005292:Ferricyanides; D037742:Nanotubes, Carbon; D010655:Phenylenediamines; C007931:hexacyanoferrate III; C034193:1,2-diaminobenzene; D006861:Hydrogen Peroxide; D005949:Glucose Oxidase; D005947:Glucose