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- W3207841427 abstract "A sandwiched photoelectrochemical (PEC) immunosensor based on BiOI/Bi2S3/Ag2S was designed for the quantitative detection of cytokeratin-19 fragments (CYFRA21-1) in serum. In this work, due to the intervention of the narrow band gap Bi2S3, the absorption of the light source by the BiOI/Bi2S3 heterostructure has been significantly enhanced. Meanwhile, the matched band structure of BiOI, Bi2S3 and Ag2S promoted the rapid transfer of electrons between the conduction bands and effectively inhibited the recombination of electron-hole pairs, thus enhanced the photoelectric signals. Sulfur and nitrogen co-doped carbon quantum dots (S,N-CQDs) with up-conversion luminescence properties provided more light energy for the base materials. On the other hand, S,N-CQDs were combined with Ab2 through polydopamine (PDA), as secondary antibody labels, further enhanced the sensitivity of the sensor. Herein, the linear range of the sensor was from 0.001 to 100 ng mL-1 and the detection limit was 1.72 pg mL-1. In addition, the sensor provides a feasible way for the detection of tumor markers due to its excellent selectivity, repeatability and good stability." @default.
- W3207841427 created "2021-10-25" @default.
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- W3207841427 date "2022-01-01" @default.
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- W3207841427 title "A sandwiched photoelectrochemical biosensing platform for detecting Cytokeratin-19 fragments based on Ag2S-sensitized BiOI/Bi2S3 heterostructure amplified by sulfur and nitrogen co-doped carbon quantum dots" @default.
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- W3207841427 doi "https://doi.org/10.1016/j.bios.2021.113703" @default.
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