期刊
ANALYST
卷 138, 期 23, 页码 7101-7106出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3an01533e
关键词
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资金
- National Natural Science Foundation of China [21175061, 21375050, 21305052, 31271620]
- Program of Natural Science Foundation of Education Bureau of Jiangsu Province, China [10KJA470007, 13KJB210004]
- Key Laboratory of Modern Agriculture Equipment and Technology [NZ201109]
- China Postdoctoral Science Foundation [2012M520998, 2012M511217]
- Innovation Project of Science and Technology for College Graduates of Jiangsu Province [CXZZ12_0704]
This work reports a novel strategy to amplify the electrochemiluminescence (ECL) signal of peroxydisulfate solution based on the Au nanoparticle decorated reduced graphene oxide (Au NP-RGO), and further an ECL biosensor for sensitive and selective detection of dopamine (DA) was constructed. Due to the synergistic amplification of Au NPs and RGO, the ECL signal of peroxydisulfate solution on the Au NPRGO modified electrode was about 5-fold enhanced compared to that of the bare electrode with the ECL onset potential positively shifted from -1.2 V to -0.9 V. More interestingly, the ECL intensity of peroxydisulfate solution increased with the increase of DA concentration, based on which an ECL biosensor for DA determination was fabricated. The as-prepared solid-state ECL DA sensor showed a wide linear response of 0.02-40 mu M with a detection limit of 6.7 nM (S/ N 3). Moreover, we expect this work would open up a new field in the application of peroxydisulfate solution ECL for highly sensitive bioassays.
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