期刊
SENSORS AND ACTUATORS A-PHYSICAL
卷 312, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.sna.2020.112167
关键词
Nitrogen doped graphene quantum dots; Ru(bpy)(3)(2+)-doped silica nanoparticles; Self-enhanced electrochemiluminescence
资金
- National Natural Science Foundation of China [21675065, 61801195]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [18KJB416004]
- China Postdoctoral Science Foundation [2019T120399, 2018M632238]
- Innovation/Entrepreneurship Program of Jiangsu Province
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions [PAPD-2018-87]
Self-enhanced electrochemiluminescence (ECL) technology has raised special concern on analytical performance owing to its accurate measurement. In this study, an innovative self-enhanced luminophore was synthesized utilizing nitrogen doped graphene quantum dots (NGQDs) as co-reactant of Ru(bpy)(3)(2+)-doped silica nanoparticles (RuDS NPs). Because both RuDS NPs and NGQDs exhibited negative charge, the RuDS NPs were firstly modified with amino groups to produce positively charged NH2-RuDS NPs, which can be further successfully combined with negatively charged NGQDs via electrostatic interaction. Compared with the mixture of NH2-RuDS NPs and NGQDs, the NH2-RuDS@NGQDs luminophore expressed superior ECL performance due to its short electron transfer distance and low energy loss. Based on the quenching effect between the excited state of NH2-RuDS@NGQDs luminophore and the oxidation form of carbaryl, a sensitive ECL sensor was successfully constructed for carbaryl quantification. The proposed self-enhanced ECL sensor exhibited a relatively wider linear range of 1.0 x 10(-13) - 1.0 x 10(-4) g mL(-1) and a lower detection limit of 2.2 x 10(-15) g mL(-1) in compassion with most reported methods. Therefore, the innovative self-enhanced NH2 -RuDS@NGQDs luminophore with excellent performance may expand great potential in bioanalysis. (C) 2020 Elsevier B.V. All rights reserved.
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