Polyamine-functionalized carbon quantum dots for chemical sensing

被引:586
作者
Dong, Yongqiang
Wang, Ruixue
Li, Hao
Shao, Jingwei
Chi, Yuwu [1 ]
Lin, Xiaomei
Chen, Guonan
机构
[1] Fuzhou Univ, MOE Key Lab Anal & Detect Technol Food Safety, Fujian Prov Key Lab Anal & Detect Technol Food Sa, Fuzhou 350108, Fujian, Peoples R China
基金
中国国家自然科学基金;
关键词
ELECTROGENERATED CHEMILUMINESCENCE; NANOCRYSTALS;
D O I
10.1016/j.carbon.2012.02.046
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:2810 / 2815
页数:6
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