聚乙烯亚胺
碳化
碳量子点
荧光
量子点
柠檬酸
量子产额
纳米晶
石墨
纳米技术
材料科学
碳纤维
多胺
化学工程
化学改性
化学
吸附
有机化学
高分子化学
复合数
复合材料
生物化学
转染
物理
量子力学
工程类
基因
作者
Yongqiang Dong,Ruixue Wang,Hao Li,Jingwei Shao,Yuwu Chi,Xiaomei Lin,Guonan Chen
出处
期刊:Carbon
[Elsevier]
日期:2012-02-23
卷期号:50 (8): 2810-2815
被引量:558
标识
DOI:10.1016/j.carbon.2012.02.046
摘要
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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