Functional contrast and kinetic analysis of water-dispersible carbon black nanoparticles and MWNTs in glucose biosensors.
Poly (sodium 4-styrenesulfonate) (PSS) was grafted onto carbon black surface by ambient surface-initiated atom radical transfer polymerization. And the carbon paste electrodes modified by CB-g-PSS and MWNTs were completed. CB-g-PSS and MWNTs had no effect on direct electron transfer based on the carbon paste electrode, but increased the redox speed of Fe [(CN)(6)](3-) / Fe[(CN)(6)](4-) and led to stronger current response. The experimental results indicate that the sensitivity of modified by CB-g-PSS is 2.1 times of no modified, and MWNTs is 4 times. Measurable linear range is 1.1 mmol/L approximately 33.3 mmol/L. For sensors modified by CB-g-PSS, testing of different concentration glucose: RSD<7%; sensors modified by MWNTs, RSD<7.5% (glucose < 15 mmol/L), RSD<10% (glucose > 15 mmol/L) respectively.
Yang
Hao
H
State Specialized Laboratory of Biomedical Sensors, Department of Biomedical Engineering, Zhejiang University, Hangzhou, China 310027. yanghaoyanghao@sina.com
Yang
Xiaohe
X
Pan
Min
M
Chen
Yuquan
Y
Chen
Dajing
D
D001698:Biomedical Engineering; D015374:Biosensing Techniques / Q000379:methods*; D004800:Enzymes, Immobilized; D005947:Glucose / Q000032:analysis*; D005949:Glucose Oxidase; D007700:Kinetics; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000648:ultrastructure; D037742:Nanotubes, Carbon / Q000648:ultrastructure; D011137:Polystyrenes; D053260:Soot; D014867:Water
D004800:Enzymes, Immobilized; D037742:Nanotubes, Carbon; D011137:Polystyrenes; D053260:Soot; D014867:Water; C003321:polystyrene sulfonic acid; D005949:Glucose Oxidase; D005947:Glucose