Polyamine-functionalized carbon quantum dots for chemical sensing |
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| Authors: | Yongqiang Dong Ruixue Wang Hao Li Jingwei Shao Yuwu Chi Xiaomei Lin Guonan Chen |
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| Affiliation: | MOE Key Laboratory of Analysis and Detection Technology for Food Safety, Fujian Provincial Key Laboratory of Analysis and Detection Technology for Food Safety, and Department of Chemistry, Fuzhou Univiersity, Fujian 350108, China |
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| Abstract: | Polyamine-functionalized carbon quantum dots (CQDs) with high fluorescence quantum yield (42.5%) have been synthesized by the low temperature (<200 °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. |
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