A novel multi-walled carbon nanotube-based biosensor for glucose detection.
The bioelectrochemical characteristics of a novel multi-walled carbon nanotube (MWNT)-based biosensor for glucose detection are studied and compared with those of glassy carbon (GC)-based biosensor. The MWNT-based biosensor exhibits a strong glucose response at applied potentials of 0.65 and 0.45 V versus Ag/AgCl, respectively, while GC-based biosensor shows a weak glucose response at 0.65 V and no response at 0.45 V. Besides, the MWNT-based biosensor shows a high stability of 86.7% of the initial activity to glucose after four-month storage, much higher than 37.2%, the corresponding value for a GC-based biosensor. The detection mechanism of the MWNT-based biosensor is also discussed in detail.
Wang
S G
SG
Microelectronics Centre, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore 639798, Singapore. esgwang@ntu.edu.sg
Zhang
Qing
Q
Wang
Ruili
R
Yoon
S F
SF
D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D004566:Electrodes; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D005949:Glucose Oxidase / Q000737:chemistry; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D036103:Nanotechnology; D012825:Silicon; D017550:Spectroscopy, Fourier Transform Infrared; D013997:Time Factors
D002244:Carbon; D005949:Glucose Oxidase; D005947:Glucose; D012825:Silicon