期刊
APPLIED SURFACE SCIENCE
卷 423, 期 -, 页码 810-816出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.06.199
关键词
Graphene quantum dots; Molecularly imprinted polymers; DA; Fluorescent; Sensor
类别
资金
- Fundamental Research Funds for the Central Non-profit Research Institution of CAF [CAFYBB2016ZX002]
- National Natural Science Foundation of China [51508242]
- Natural Science Foundation of Jiangsu Province of China [BK20151012]
A novel fluorescence sensor was developed for dopamine (DA) determination based on molecularly imprinted graphene quantum dots and poly(indolylboronic acid) composite (MIPs@ PIn-BAc/GQDs). When the DA is added to the system, it leads to an aggregation and fluorescence quenching of the MIPs@ PIn-BAc/GQDs because of the covalent binding between the catechol group of DA and boronic acid. Such fluorescence behaviors are used for well testing DA in a range from 5 x 10(-9) to 1.2 x 10(-6) M with the detection limit of 2.5 x 10(-9) M. Furthermore, the prepared sensors could well against the interferences from various biomolecules and be successfully used for the assay of DA in human biological samples, exhibiting excellent specificity. It is believed that the prepared MIPs@ PIn-BAc/GQDs hold great promise as a practical platform that can monitor DA level change. (C) 2017 Elsevier B.V. All rights reserved.
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