Journal
BIOSENSORS & BIOELECTRONICS
Volume 44, Issue -, Pages 127-131Publisher
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2013.01.003
Keywords
Poly(3,4-ethylenedioxythiophene); Nanosphere; Palladium; Hydrogen peroxide; Nonenzymatic biosensor
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Funding
- National Natural Science Foundation of China [51073114, 20933007, 51073074, 50963002, 2010GZH0041]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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We developed a novel nonenzymatic biosensor based on palladium/poly(3,4-ethylenedioxythiophene) (Pd/PEDOT) nanocomposite modified glassy carbon electrode (GCE) for the detection of hydrogen peroxide (H2O2). Pd/PEDOT has been successfully fabricated by a facile one-pot 'green' method using H2PdCl4 as an oxidant and a source of metal nanoparticles without any surfactants and templates. The as-synthesized PEDOT nanospheres are quite uniform in size (similar to 60 nm) without aggregation and provide a good platform for anchoring the Pd nanoparticles (NPs). Pd NPs (similar to 4.5 nm) are homogenously dispersed on surface of PEDOT nanospheres. The Pd/PEDOT nanospheres on GCE exhibit a good electrocatalytic activity towards the H2O2 reduction. The electrochemical response of Pd/PEDOT to H2O2 exhibits a low detection limit of 2.84 mu M in the range of 2.5 x 10(-3)-1.0 mM with a high sensitivity, good repeatability, acceptable reproducibility and good long-term stability. The good recoveries achieved in spiked human urine samples demonstrated the potential application of Pd/PEDOT for H2O2 detection. (C) 2013 Elsevier B.V. All rights reserved.
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