Polyamine-functionalized carbon quantum dots for chemical sensing

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• 作者：Yongqiang Dong ; Ruixue Wang ; Hao Li ; Jingwei Shao ; Yuwu Chi ; ^{y.w.chi@fzu.edu.cn} ; Xiaomei Lin ; Guonan Chen
• 刊名：Carbon
• 出版年：2012
• 期刊代码：10_00086223
• 类别：ms
• 出版时间：July, 2012
• 卷：50
• 期：8
• 页码：2810-2815
• 文件大小：599 K

摘要

Polyamine-functionalized carbon quantum dots (CQDs) with high fluorescence quantum yield (42.5%) have been synthesized by the low temperature (<200 掳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.