Selective detection of dopamine in the presence of ascorbic acid via fluorescence quenching of InP/ZnS quantum dots

International Journal of Nanomedicine
Seshadri Reddy Ankireddy, Jongsung Kim

Abstract

Dopamine is a neurotransmitter of the catecholamine family and has many important roles, especially in human brain. Several diseases of the nervous system, such as Parkinson's disease, attention deficit hyperactivity disorder, restless legs syndrome, are believed to be related to deficiency of dopamine. Several studies have been performed to detect dopamine by using electrochemical analysis. In this study, quantum dots (QDs) were used as sensing media for the detection of dopamine. The surface of the QDs was modified with l-cysteine by coupling reaction to increase the selectivity of dopamine. The fluorescence of cysteine-capped indium phosphide/zinc sulfide QDs was quenched by dopamine with various concentrations in the presence of ascorbic acid. This method shows good selectivity for dopamine detection, and the detection limit was 5 nM.

Citations

Nov 12, 2019·Frontiers in Cellular Neuroscience·Anna V LeopoldVladislav V Verkhusha
Apr 4, 2019·Frontiers in Neurology·Nicole BallJames Chapman
Feb 23, 2020·Sensors·Faten Bashar Kamal Eddin, Yap Wing Fen

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Methods Mentioned

BETA
transmission electron microscopy

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