Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 178, Issue -, Pages 169-175Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.12.060
Keywords
Toluidine blue O; Ordered mesoporous carbon; Ionic liquid; Synergistic effect; NADH
Funding
- National Natural Science Foundation of China [21101075]
- Nature Science Foundation of Shandong Province [ZR2011BL012, ZR2012BL01]
- Shandong Province Higher Educational Science and Technology Program [J12LD54]
- Ningxia Medical University Special Talents' Scientific Research Project [XT2012014]
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A novel gel was developed based on the polymerization of a composite containing toluidine blue O (TBO) functionalized ordered mesoporous carbon (OMC) by a pi-pi stacking interaction and ionic liquid (IL). The poly (toluidine blue O) (PTBO)-OMC-IL composite film distributes almost homogeneously with unique structure on the surface of substrate. The PTBO-OMC-IL gel modified glass carbon (GC) electrode displays high conductivity investigated by electrochemical method. Electrochemical studies suggest that the PTBO-OMC-IL gel/GC electrode provide a positively synergistic effect among PTBO, OMC and IL on the electrochemical oxidation of NADH. Under a low applied potential of -0.034V, NADH could be linearly detected from 1.0 mu mol L-(1) up to 6.0 mmol L-(1) with a low detection limit of 0.4 mu mol L-(1) (S/N = 3) and fast response time of 2s. So the PTBO-OMC-IL gel modified electrode may be used as electrochemical transducers and has potential application for designing a variety of NAD(+)-dependent electrochemical biosensors. (c) 2013 Elsevier B.V. All rights reserved.
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