Journal
CARBON
Volume 50, Issue 8, Pages 2810-2815Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2012.02.046
Keywords
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Funding
- National Natural Science Foundation of China [21075018]
- Program for New Century Excellent Talents in Chinese University [NCET-10-0019]
- Natural Science Funds for Distinguished Young Scholar of Fujian Province, China [2009J06003]
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Polyamine-functionalized carbon quantum dots (CQDs) with high fluorescence quantum yield (42.5%) have been synthesized by the low temperature (<200 degrees C) carbonization of citric acid with branched polyethylenimine (BPEI) in one simple step. The obtained BPEI-CQDs are spherical graphite nanocrystals (average 6.2 nm in size) capped with abundant BPEI at their surfaces. It is the first report that CQDs are both amino-functionalized and highly fluorescent, which suggests their promising applications in chemical sensing. (C) 2012 Elsevier Ltd. All rights reserved.
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