Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 183, Issue -, Pages 34-39Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.03.115
Keywords
Multiwalled carbon nanotubes; Platinum nanoparticles; Femtosecond laser; Glucose
Funding
- National Science Council, Taiwan
- Ministry of Education, Taiwan under the ATU plan
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Multiwalled carbon nanotubes (MWCNTs) supported platinum (Pt) nanoparticles were fabricated in aqueous solution without reducing agents by femtosecond laser. The surface morphological, compositional, and structural characterizations of the prepared Pt/MWCNT were examined using scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. The results showed that the Pt nanoparticles with about 5-10 nm in diameter were well dispersed on the surface of MWCNTs. Cyclic voltammetry was employed to investigate the electrocatalytic activity toward the electrooxidation of glucose in alkaline solution at the Pt/MWCNT. The Pt/MWCNT modified glassy carbon electrode displayed high electrocatalytic ability for the direct electrochemical oxidation of glucose in alkaline solution. At an applied potential of -0.25 V vs. Ag/AgCl 3 M KCl, the Pt/MWCNT modified electrode exhibited a sensitivity of 0.106 AM(-1) cm(-2) with a linear range up to 2.4 mM. This proposed glucose sensor also showed good abilities of anti-interference to acetaminophen, uric acid, fructose, and ascorbic acid. (c) 2013 Elsevier B.V. All rights reserved.
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