Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 178, Issue -, Pages 586-592Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.12.112
Keywords
Nonenzymatic sensor; Glucose; Carbon nanotube forest; Nanocomposite; Interferents
Funding
- EU Framework Programme 7 (CORONA) [CP-FP 213969-2]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning
- Shanghai Second Polytechnic University [A30XK121101]
- Program for New Century Excellent Talents in University [NECT-10-883]
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A highly sensitive nonenzymatic amperometric glucose sensor was fabricated by using Ni nanoparticles homogeneously dispersed within and on the top of a vertically aligned CNT forest (CNT/Ni nanocomposite sensor), which was directly grown on a Si/SiO2 substrate. The surface morphology and elemental analysis were characterized using scanning electron microscopy and energy dispersive spectroscopy, respectively. Cyclic voltammetry and chronoamperometry were used to evaluate the catalytic activities of CNT/Ni electrode. The CNT/Ni nanocomposite sensor exhibited a great enhancement of anodic peak current after adding 5 mM glucose in alkaline solution. The sensor can also be applied to the quantification of glucose content with a linear range covering from 5 mu M to 7 mM, a high sensitivity of 1433 mu A mM(-1) cm(-2), and a low detection limit of 2 mu M. The CNT/Ni nanocomposite sensor exhibits good reproducibility and long-term stability, moreover, it was also relatively insensitive to commonly interfering species, such as uric acid, ascorbic acid, acetaminophen, sucrose and D-fructose. (c) 2013 Elsevier B.V. All rights reserved.
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