NDLI: Decoration of carbon nanotube films with iridium nanoparticles and their electrochemical characterization

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Decoration of carbon nanotube films with iridium nanoparticles and their electrochemical characterization

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Decoration of carbon nanotube films with iridium nanoparticles and their electrochemical characterization

Content Provider	Springer Nature Link
Author	Irfan, Muhammad Pham, Xuan Hung Han, Kwi Nam Li, Cheng Ai Hong, Myung Hyo Seong, Gi Hun
Copyright Year	2014
Abstract	We report the development of a novel nonenzymatic glucose sensor based on single-walled carbon nanotube film electrodes coated with iridium nanoparticles (IrNPs-SWCNT). The SWCNT film electrode was first loaded with iridium nanoparticles (IrNPs) by an easily controllable chronocoulometry technique. The SWCNT film electrode coated with IrNPs was characterized by field emission scanning electron microscopy and electrochemical techniques like cyclic voltammetry (CV) and amperometry. There was no current response for glucose oxidation in neutral and acidic media, but a couple of oxidative and reductive peaks were observed when the IrNPs-SWCNT electrode was scanned in alkaline media, showing the strong electrocatalytic activity toward glucose oxidation. Amperometric measurements showed a high sensitivity of 63 μAcm$^{−2}$ mM$^{−1}$ and a detection limit of 17 μM; further, the measurements showed a linear range of 0.59–14 mM. To improve the selectivity of the electrode, the prepared IrNPs-SWCNT film electrode was coated using a 1.0% Nafion aqueous solution. When the electrodes were exposed to interfering substances such as uric acid and ascorbic acid, there were no significant signals observed from these substances, indicating that Nafion is an effective permselective polymer barrier. The sensitivity of the Nafion-coated electrode was 23 μAcm$^{−2}$ mM$^{−1}$ and the detection limit was 47 μM. In addition, the electro-catalytic activity of the Nafioncoated electrode was still stable after 50 cycles in the presence of a 3.0 mM glucose solution as measured by CV.
Starting Page	129
Ending Page	136
Page Count	8
File Format	PDF
ISSN	19760280
Journal	BioChip Journal
Volume Number	8
Issue Number	2
e-ISSN	20927843
Language	English
Publisher	The Korean BioChip Society (KBCS)
Publisher Date	2014-06-20
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Electrocatalysis Iridium nanoparticles Carbon nanotubes Electrochemical deposition Glucose Biotechnology Biomedical Engineering
Content Type	Text
Resource Type	Article
Subject	Bioengineering Biomedical Engineering Electrical and Electronic Engineering Biotechnology

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