文献类型：期刊文献

英文题名：Practical access to bandgap-like N-doped carbon dots with dual emission unzipped from PAN@PMMA core-shell nanoparticles

作者：Wang, Youfu[1];Dong, Luhua[1];Xiong, Rulin[1];Hu, Aiguo[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：1

期号：46

起止页码：7731

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20134716997203);WOS:【SCI-EXPANDED(收录号:WOS:000326982500010)】；

基金：The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (21274042, 20874026), the Shanghai Shuguang Project (07SG33) and the Shanghai Leading Academic Discipline Project (B502). A. H. thanks Prof. Lingyong Zhu for his valuable comments on this work.

语种：英文

外文关键词：Particle size analysis - Core shell nanoparticles - Carbon - Shells (structures) - Doping (additives) - Microemulsions

摘要：As emergent nanolights for bioimaging, catalysis, sensors, and photoelectronics, carbon dots (C-dots) have attracted much research attention. However, the practical and scalable preparation of C-dots has been less explored, even after various top-down and bottom-up approaches being reported recently. To this end, we discover a new approach to prepare C-dots by simply unzipping core-shell polymeric nanoparticles, prepared by a microemulsion polymerization. Uniformly distributed N-doped C-dots are prepared by the pyrolysis of PAN@PMMA core-shell nanoparticles at different temperatures, followed by dialysis. TEM analysis shows that many of the C-dots of 2-3 nm size are unzipped from each polymeric particle. All the purified C-dots show a bandgap-like photoluminescence (PL) behaviour, with dual emission and a stable PL between pH 5-12.