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Dr. Euan R. Kay, Jungmin Lee, Prof. Daniel G. Nocera and Prof. Moungi G. Bawendi Conformational Control of Energy Transfer: A Mechanism for Biocompatible Nanocrystal-Based Sensors Angewandte Chemie International Edition 52

Article first published online: 6 DEC 2012 | DOI: 10.1002/anie.201207181

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Know when to fold 'em: Combination of a pH-triggered oligonucleotide conformational switch with fluorescent nanocrystals gives a sensitive pH nanosensor (see scheme). Analyte-dependent conformational changes control the distance between the nanocrystal energy donor (green) and a FRET acceptor (red), which results in a reporter for pH values in individual endosomes of living cells.

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