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• W3187876387 endingPage "122782" @default.
• W3187876387 startingPage "122782" @default.
• W3187876387 abstract "Previous 17 β -estradiol sensors required expensive reagents or complicated fabrication of sensing probes. In this work, a cheap, simple, and reusable electrochemical sensor based on commercially available polyaniline (PANI) and carbon dots (CDs) synthesized from iota-carrageenan was developed for the sensitive detection of 17 β -estradiol. The sensor was simply prepared by drop-casting CDs/PANI composite on a glassy carbon electrode (GCE) using poly(vinylidene fluoride) as a binder. With synergistic contributions from both CDs and PANI, the CDs-PANI/GCE was much more electrochemically stable than the CDs/GCE or PANI/GCE. The CDs-PANI/GCE was sensitive to 17 β -estradiol across a linear range from 0.001 to 100 μmol L −1 with a detection limit of 43 nmol L −1 . The electrochemical measurement can be performed in 2 min and the probe can be reused for several hundred times. The CDs-PANI/GCE was selective towards 17 β -estradiol against several interferences and gave excellent recovery between 94.4 and 103.7 % from real sample analysis. From intensive investigation on electron transfer process and energy levels, the oxidation reaction of 17 β -estradiol occurred on the surface of CDs-PANI/GCE via favorable energy levels and dominantly surface adsorption process through π-π stacking and hydrogen bonding between 17 β -estradiol and CDs/PANI. Such unique interfacial interactions also resulted in the synergistically enhanced electrochemical stability of the modified electrode. • Simple: PANI/CDs composite electrodes were simply prepared by drop-casting. • Sensitive : they gave an LOD of 43 nmol L −1 for the detection of 17 β -estradiol. • Selective : they were selective to 17 β -estradiol against several interferences. • Reusable : they can be used for 280 times with 65.4 % signal retention. • Accurate : concentrations of 17 β -estradiol in real samples were accurately measured." @default.
• W3187876387 created "2021-08-16" @default.
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• W3187876387 date "2021-12-01" @default.
• W3187876387 modified "2023-10-17" @default.
• W3187876387 title "Facile fabrication of 17<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML altimg=si1.svg><mml:mi mathvariant=normal>β</mml:mi></mml:math>-estradiol electrochemical sensor using polyaniline/carbon dot-coated glassy carbon electrode with synergistically enhanced electrochemical stability" @default.
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• W3187876387 doi "https://doi.org/10.1016/j.talanta.2021.122782" @default.
• W3187876387 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34517640" @default.
• W3187876387 hasPublicationYear "2021" @default.
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