Journal
BIOSENSORS & BIOELECTRONICS
Volume 78, Issue -, Pages 308-314Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2015.11.063
Keywords
Molecularly imprinted polymer; Nanoporous alloy microrod; Electrochemical sensor; Trace measurement; Dopamine
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Funding
- Major Program for Science and Technology Development of Shihezi University [gxjs2014-zdgg04]
- National Natural Science Foundation of China [81260487, 81460543, 21575089]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars from Ministry of Human Resources and Social Security of China [RSLX201301]
- Pairing Program of Shihezi University with Eminent Scholar in Elite University [SDJDZ201502]
- Open Funding Project of the State Key Laboratory of Bioreactor Engineering
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In this work, we developed a novel freestanding metallic microrod as working electrode for highly sensitive and selective electrochemical detection of trace dopamine (DA). The electrode was facilely fabricated via first dealloying smooth Au-Ag alloy microrod (AMR) into nanoporous Au-Ag alloy microrod (NPAMR) and further modifying with electro-polymerized molecularly imprinted polymer (MIP). Influencing factors during electro-polymerization process including pH value and molar ratio of monomer to template molecule were optimized. Under the optimal conditions, a linear range from 2 x 10(-13) to 2 x 10(-8) M for measuring DA was obtained with an ultralow detection limit of 7.63 x 10(-14) M (S/N=3). In addition, the MIP-modified electrode (MIP/NPAMR) was successfully employed to test DA in serum and brain samples. (C) 2015 Elsevier B.V. All rights reserved.
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