期刊
NANOTECHNOLOGY
卷 27, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/27/7/075504
关键词
graphene; nanobelts; dopamine; electrochemical sensor
资金
- University Grant commission
- India-UK-India Education and Research Initiative (UGC-UKIERI) [UGC-2013-14/005]
- CNPq (Brazil)
- DST-CNPq/India-Brazil bilateral Cooperation [INT/Brazil/P-12/2013]
In the present study, we report the electrochemical sensing property of multi-layer graphene nanobelts (GNBs) towards dopamine (DA). GNBs are synthesized from natural graphite and characterized by using techniques like field-emission scanning electron microscopy, atomic force microscopy and Raman spectroscopy. An electrochemical sensor based on GNBs is developed for the detection of DA. From the cyclic voltammetry and amperometry studies, it is found that GNBs possess excellent electrocatalytic activity towards DA molecules. The developed DA sensor showed a sensitivity value of 0.95 mu A mu M-1 cm(-2) with a linear range of 2 mu M to 0.2 mM. The interference data exhibited that GNB is highly selective to DA even in the presence of common interfering species like ascorbic acid, uric acid, glucose and lactic acid.
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