Ultrasensitive and visible light-responsive photoelectrochemical aptasensor for edifenphos based on Zinc phthalocyanine sensitized MoS nanosheets.

Author(s) Ding, L.; Jiang, D.; Wen, Z.; Xu, Y.; Guo, Y.; Ding, C.; Wang, K.
Journal Biosens Bioelectron
Date Published 2020 Feb 15

Developing a simple, rapid detection method for the analysis of edifenphos (EDI) is crucial due to its residue is harmful to acetylcholinesterase on the human cellular system, and cause a lot of complications. Herein, we synthesized visible light-responsive MoS nanosheets decorated with Zinc phthalocyanine (ZnPc) nanoparticles (ZnPc/n-MoS). Due to the sensitization of ZnPc nanoparticles, the resulting ZnPc/n-MoS exhibited narrower energy bandgap and efficient charge transfer. Especially, the carrier lifetime of ZnPc/n-MoS is 2 more times longer than n-MoS, and the photocurrent intensity of ZnPc/n-MoS is 24 times of n-MoS and 22 times of ZnPc nanoparticles under visible light irradiation. Further, a visible light-responsive ultrasensitive photoelectrochemical (PEC) aptasensor for selectivity recognition of EDI was triumphantly established by using EDI aptamer as a biorecognition element, which exhibited a wide linear ranking from 5 ng L to 10 μg L (R = 0.996) and a low detection limit of 1.667 ng L (S/N = 3). The splendid performance of the ZnPc/n-MoS nanosheet ultrasensitive sensing platform can be applied to detect the concentration of EDI in food, biomedical and environmental analysis.

DOI 10.1016/j.bios.2019.111867
ISSN 1873-4235
Citation Biosens Bioelectron. 2020;150:111867.

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