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CdTe0.5S0.5/ZnS Quantum Dots Embedded in a Molecularly Imprinted Polymer for the Selective Optosensing of Dopamine

1
Faculty of Chemistry, Kharazmi University, Tehran 15719-14911, Iran
2
Institut Jean Lamour, UMR CNRS 7198, Université de Lorraine, F-54000 Nancy, France
3
Institut de Science des Matériaux de Mulhouse, CNRS, UMR 7361, 15 rue Jean Starcky, 68093 Mulhouse, France
4
Laboratoire Réactions et Génie des Procédés, Université de Lorraine, CNRS, LRGP, F-54000 Nancy, France
*
Author to whom correspondence should be addressed.
Nanomaterials 2019, 9(5), 693; https://doi.org/10.3390/nano9050693
Received: 18 March 2019 / Revised: 22 April 2019 / Accepted: 26 April 2019 / Published: 3 May 2019
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Abstract

This work describes the preparation of molecularly imprinted polymer (MIP)-modified core/shell CdTe0.5S0.5/ZnS quantum dots (QDs). The [email protected] particles were used for the selective and sensitive detection of dopamine (DA). Acrylamide, which is able to form hydrogen bonds with DA, and ethylene glycol dimethylacrylate (EGDMA) as cross-linker were used for the preparation of the MIP. Highly cross-linked polymer particles with sizes up to 1 µm containing the dots were obtained after the polymerization. After the removal of the DA template, MIP-modified QDs ([email protected]) exhibit a high photoluminescence (PL) with an intensity similar to that of QDs embedded in the nonimprinted polymer (NIP). A linear PL decrease was observed upon addition of DA to [email protected] and the PL response was in the linear ranges from 2.63 µM to 26.30 µM with a limit of detection of 6.6 nM. The PL intensity of [email protected] was quenched selectively by DA. The [email protected] particles developed in this work are easily prepared and of low cost and are therefore of high interest for the sensitive and selective detection of DA in biological samples. View Full-Text
Keywords: quantum dots; molecularly imprinted polymer; dopamine; fluorescence; quenching quantum dots; molecularly imprinted polymer; dopamine; fluorescence; quenching
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Khadem-Abbassi, K.; Rinnert, H.; Balan, L.; Doumandji, Z.; Joubert, O.; Masteri-Farahani, M.; Schneider, R. CdTe0.5S0.5/ZnS Quantum Dots Embedded in a Molecularly Imprinted Polymer for the Selective Optosensing of Dopamine. Nanomaterials 2019, 9, 693.

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