A "Signal On" Photoelectrochemical Aptasensor For Tetracycline Detection Based On Semiconductor Polymer Quantum Dots
A tetraphenylporphyrin (TPP) doped PFBT polymer quantum dots (TP-Pdots) were synthesized via the reprecipitation method for photoelectrochemical (PEC) aptasensor detection of tetracycline (TC). The TP-Pdots exhibit a superior cathode photocurrent signal. TP-Pdots increase the separation of photo-gen...
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Veröffentlicht in: | Journal of the Electrochemical Society 2020-04, Vol.167 (6), p.67516, Article 067516 |
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Sprache: | eng |
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Zusammenfassung: | A tetraphenylporphyrin (TPP) doped PFBT polymer quantum dots (TP-Pdots) were synthesized via the reprecipitation method for photoelectrochemical (PEC) aptasensor detection of tetracycline (TC). The TP-Pdots exhibit a superior cathode photocurrent signal. TP-Pdots increase the separation of photo-generated charges, and improve photocurrent conversion efficiency, resulting in enhanced photocurrent response. The aptamer was used as a recognition element and TP-Pdots as a photoactive material to prepare a PEC aptasensor for sensitivity detection of TC. The PEC aptasensor was constructed by immobilizing TP-Pdots on ITO electrode and combining it with aptamer by EDC coupling. After the TC reacts specifically with the aptamer, causing the aptamer to fall off from the TP-Pdots /ITO electrodes surface and the photocurrent intensity restored. This PEC aptamer sensor possesses a wide linear range from 1.0 nmol.l−1 to 1.0 × 10 4 nmol.l−1 with the detection limit of 0.26 nmol.l−1. Meanwhile, the PEC aptasensor was successfully used for the detection of tetracycline in honey. |
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ISSN: | 0013-4651 1945-7111 1945-7111 |
DOI: | 10.1149/1945-7111/ab818a |