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The authors describe a method for the differentiation of penicillamine (PA) enantiomers by using CdSe/ZnS quantum dots (QDs) modified with β-cylodextrin (β-CD-CdSe/ZnS QDs). Selective enantiorecognition of L-PA and D-PA was accomplished by virtue of selective host-guest interaction between the PAs and the β-CD pockets on the QDs. The fluorescence intensity of the modified QDs decreases in the presence...
The article describes a simple optical assay for glucose. It is based on the use of paper spots loaded with colloidal CdSe/ZnS quantum dots (Q-dots) and the enzyme glucose oxidase (GOx). Circular paper sheets were uniformly loaded with Q-dots and then displayed strong fluorescence under a UV lamp (365 nm exCitation). The action of GOx causes the production of H2O2 which, after a typical exposure time...
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