Water-Soluble Off-On Spin-Labeled Quantum-Dots Conjugate
Engineering quantum dots (QDs) with a paramagnetic nitroxide radical tail yields a weakly fluorescent spin‐labeled QD conjugate. Quenching of the intrinsic fluorescence of the QDs results from electron transfer between the QDs and nitroxide radical. Interestingly, when the paramagnetic properties of...
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Published in | Small (Weinheim an der Bergstrasse, Germany) Vol. 4; no. 6; pp. 759 - 764 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
WILEY-VCH Verlag
01.06.2008
WILEY‐VCH Verlag |
Subjects | |
Online Access | Get full text |
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Summary: | Engineering quantum dots (QDs) with a paramagnetic nitroxide radical tail yields a weakly fluorescent spin‐labeled QD conjugate. Quenching of the intrinsic fluorescence of the QDs results from electron transfer between the QDs and nitroxide radical. Interestingly, when the paramagnetic properties of the nitroxide moiety are eliminated, the quenched fluorescence of QDs is readily restored, making the spin‐labeled QDs sensitive to a biological antioxidant, vitamin C (Vc; see figure). |
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Bibliography: | ark:/67375/WNG-Q1M8ZK1W-1 ArticleID:SMLL200700788 istex:65D974E6E08D0C8555BCEDA3264B2E258377DF40 This work was supported by the National Natural Science Foundation of China (20375032, 20675068). ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 1613-6810 1613-6829 |
DOI: | 10.1002/smll.200700788 |