期刊
ANALYTICA CHIMICA ACTA
卷 1091, 期 -, 页码 40-49出版社
ELSEVIER
DOI: 10.1016/j.aca.2019.08.036
关键词
Polymer dots; Dopamine detection; Fluorescence; Microfluidic; Single cell; Living PC12 cells
资金
- Research Office of University of Kurdistan-Iran [4.1404086]
- Iranian Nanotechnology Initiative Funds for research on microfluidic based sensors
We report here simple synthetic method for preparing polymer dots (Pdots) via hydrothermal treatment of organic dye (neutral red), urea and trisodium citrate. The prepared Pdots with enhanced quantum yield (quantum yield: 30.2%) was used as a selective and sensitive probe for fluorescent sensing of dopamine (DA) with high selectivity and sensitivity. The as-synthesized Pdots exhibited strong fluorescence intensity at 435 nm, which DA can trigger remarkable fluorescence quenching of such luminescent Pdots on the basis of inner filter effect (IFE) and static quenching effect (SQE). A wide linearity range (0.001 mu M-900 mu M) for DA detection was obtained with lower DL (3 S/N) of 0.28 nM, and no interference from other molecules such as ascorbic acid, urine acid, glutathione, glucose, epinephrine, arginine, cysteine, proline, creatinine, serine; alanine, L-therionine, Hg2+, Mg2+, K+, Ca2+ and Na+. The designed sensor was successfully applied in the imaging of DA in single living PC12 cells using droplet microfluidic approach, indicating its acceptable practicability of the proposed assay for DA detection with ultrahigh sensitivity in biological samples. (C) 2019 Elsevier B.V. All rights reserved.
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