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Voltammetric Detection of Dopamine at Gold Nanotadpoles Modified Electrode

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Gold nanotadpoles were synthesized by a simple temperature-reducing seeding approach. A novel gold electrode modified with gold nanotadpoles through a sulphydryl-terminated self-assembled monolayer was then fabricated and exhibited strong promoting effect toward the electrochemical oxidation of dopamine (DA). The anodic peak currents obtained from the cyclic voltammetry (CV) were linearly dependent on DA concentration over the range of 3 × 10−5∼1.8 × 10−4 M with correlation coefficient of 0.999. The detection limit obtained was 0.1 μM. It was also successfully used for the selective detection of DA in the presence of ascorbic acid (AA). This modified electrode showed good selectivity and recovery.
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Keywords: DETECTION; DOPAMINE; GOLD NANOTADPOLES

Document Type: Research Article

Publication date: 2009-02-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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