文献类型：期刊文献

英文题名：Amorphous carbon dots with high two-photon fluorescence for cellular imaging passivated by hyperbranched poly(amino amine)

作者：Tong, Gangsheng[1];Wang, Jingxia[2];Wang, Ruibin[1];Guo, Xinqiu[1];He, Lin[1];Qiu, Feng[3];Wang, Ge[1];Zhu, Bangshang[1];Zhu, Xinyuan[3];Liu, Tao[2]

机构：[1]Shanghai Jiao Tong Univ, Instrumental Anal Ctr, Shanghai 200240, Peoples R China;[2]E China Univ Sci & Technol, UNILAB Res Ctr Chem React Engn, State Key Lab Chem React Engn, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

年份：2015

卷号：3

期号：4

起止页码：700

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY B

收录：;EI(收录号：20150100395773);WOS:【SCI-EXPANDED(收录号:WOS:000346906500019)】；

基金：We are grateful for the financial support from the National Basic Research Program (2015CB931801), National Natural Science Foundation of China (21374062, 21376087, 51203089, 20104049, 51373099), the Open Project of State Key Laboratory of Chemical Engineering (SKL-ChE-12C04).

语种：英文

外文关键词：Photons - Lanthanum compounds - Solutions - Fluorescence imaging - Passivation

摘要：Amorphous carbon dots (C-Dots) with high two-photon fluorescence were prepared by using citric acid (CA) as the carbon source and hyperbranched poly(amino amine) (HPAA) as the surface passivation agent through a facile hydrothermal approach. The C-Dots with an average diameter about 10 nm were readily dispersed in water. They exhibited excellent fluorescence properties and excitation-dependent fluorescence behavior with the corresponding quantum yield (QY) of 17.1% in aqueous solution. Interestingly, the C-Dots emitted bright fluorescence even in the solid state with a QY of 16.3%, which is the highest value obtained for carbon-based nanomaterials. Using the MTT assay, the C-Dots showed low cytotoxicity against L929 normal cells. Furthermore, they were easily internalized by HeLa cells and presented high quality one-and two-photon cellular imaging, suggesting significant potential for application in biological imaging.