Journal
ANALYTICA CHIMICA ACTA
Volume 1146, Issue -, Pages 166-173Publisher
ELSEVIER
DOI: 10.1016/j.aca.2020.11.017
Keywords
Photoelectrochemical; TiO2 nanowires; ZnCuInSe QDs; Kanamycin
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Funding
- National Natural Science Foundation of China [No21874038]
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A highly selective and sensitive photoelectrochemical sensing platform was developed for kanamycin assay based on sandwich-structured nanowires, showing excellent detection performance and high selectivity.
A highly selective and sensitive photoelectrochemical (PEC) sensing platform was developed for kanamycin assay based on the aptamer modified sandwich-structured ZnCuInSe/Au/TiO2 nanowires. Sandwiched between the TiO2 nanowires and the ZnCuInSe quantum dot (QDs) layer, the Au nanoparticles (Au NPs) serves as a plasmonic photosensitizer and an electron relay, which expand the light absorption range and facilitates the charge transfer. Also, ZnCuInSe QDs, a broad spectrum photosensitizer can capture visible light, which enhance the photocurrent density response. Through the Au-S bond and Cu-S bond, the HS-aptamer were immobilized on the ZnCuInSe/Au/TiO2 nanowires as a recognition unit for kanamycin. The proposed sensing platform showed excellent assay performance for kanamycin with a linear response range from 0.2 to 250 nM, and high selectivity. By changing the recognizers, the proposed sensing platform could be easily extended to detect other biomolecules, and may have a promising application in bioanalysis. (C) 2020 Elsevier B.V. All rights reserved.
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