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Silicon quantum dots involved luminol chemiluminescence and its sensitive detection of dopamine

Abstract

Water dispersible silicon quantum dots (SiQDs) were synthesized by in situ growth under microwave irradiation. The prepared SiQDs were characterized by transmission electron microscopy, FT-IR, and fluorescence spectrum. In the neutral condition, weak chemiluminescence (CL) signal was obtained in luminol/K2S2O8 and SiQDs/K2S2O8 mixing solution, while strong CL signal was obtained in the presence of luminol, K2S2O8, and SiQDs. The CL spectra revealed that two luminphors were involved in the present CL system, and the possible CL mechanism was proposed. Dopamine (DA) exhibited significantly inhibiting effect on the CL signal of luminol/K2S2O8/SiQDs system, and the inhibited CL intensities were proportional to the logarithm of DA concentration in the range of 1.0×10-9 to 5.0×10-7 mol L-1 with the detection limit of 8.6×10-10 mol L-1. The proposed CL system can be successfully applied in the sensitive detection of trace level of DA in real samples.

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Publication details

The article was received on 28 May 2018, accepted on 21 Jul 2018 and first published on 23 Jul 2018


Article type: Paper
DOI: 10.1039/C8AY01211C
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Silicon quantum dots involved luminol chemiluminescence and its sensitive detection of dopamine

    L. Zhang, Z. tang and Y. Dong, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C8AY01211C

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