Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 46, Pages 12542-12547Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201408422
Keywords
bioimaging; fluorescence ink; nanomaterials; photoluminescence; quantum dots
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Funding
- National Basic Research Program of China (973 Program) [2013CB933800, 2012CB720600]
- National Natural Science Foundation of China [21372015]
- Innovation Team of the Ministry of Education [BMU20110263]
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Nitrogen-rich quantum dots (N-dots) were serendipitously synthesized in methanol or aqueous solution at a reaction temperature as low as 50 degrees C. These N-dots have a small size (less than 10nm) and contain a high percentage of the element nitrogen, and are thus a new member of quantum-dot family. These N-dots show unique and distinct photoluminescence properties with an increasing percentage of nitrogen compared to the neighboring carbon dots. The photoluminescence behavior was adjusted from blue to green simply through variation of the reaction temperature. Furthermore, the detailed mechanism of N-dot formation was also proposed with the trapped intermediate. These N-dots have also shown promising applications as fluorescent ink and biocompatible staining in C.elegans.
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