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Supramolecular strategy to construct quantum dot-based sensors for detection of paraoxon

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dc.contributor.author Kashapov R.
dc.contributor.author Bekmukhametova A.
dc.contributor.author Petrov K.
dc.contributor.author Nizameev I.
dc.contributor.author Kadirov M.
dc.contributor.author Zakharova L.
dc.date.accessioned 2019-01-22T20:38:19Z
dc.date.available 2019-01-22T20:38:19Z
dc.date.issued 2018
dc.identifier.issn 0925-4005
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/148079
dc.description.abstract © 2018 Elsevier B.V. The development of advanced tools for sensing specific materials remains an ongoing challenge. Detailed below is a new quantum dot (QD)-based sensor via supramolecular interactions, demonstrating a novel simplicity of design to obtain sensitive QDs while avoiding their covalent cross-linking. A simple label-free and turn-off method for the detection of paraoxon and its degradation products in aqueous media was proposed by using the fluorescent QD/surfactant/cyclodextrin supramolecular system. This nanocomposite was prepared from 3-mercaptopropionic acid-capped CdTe QDs coated with cetyltrimethylammonium bromide (CTAB) through electrostatic self-assembly. Further nanocomposite modification by β-cyclodextrin (β-CD), thanks to hydrophobic interaction between cetyl tails of surfactants and inner cavity of macrocycle contributed to an increase in emission intensity and stability in aqueous solution. The strong fluorescence of CdTe/CTAB/β-CD nanocomposite can be effectively quenched by the addition of paraoxon due to the host–guest complexation between β-CD cavity and paraoxon degradation product. The functionality of the paraoxon sensor was also tested with blood samples of paraoxon-poisoned rats (1/2 × LD50). These fluorescent nanocomposites were obtained by using the simple supramolecular method to coat QDs with surfactant–cyclodextrin shells. This coating strategy potentially offers common method for the functionalization of QDs and avoids time-consuming synthesis procedures.
dc.relation.ispartofseries Sensors and Actuators, B: Chemical
dc.subject Cyclodextrin
dc.subject Paraoxon
dc.subject Quantum dot
dc.subject Self-assembly
dc.subject Sensor
dc.subject Surfactant
dc.title Supramolecular strategy to construct quantum dot-based sensors for detection of paraoxon
dc.type Article
dc.relation.ispartofseries-volume 273
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 592
dc.source.id SCOPUS09254005-2018-273-SID85049044455


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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