title: Nitrogen-doped, carbon-rich, highly photoluminescent carbon dots from ammonium citrate.
abstract: The synthesis of water-soluble nitrogen-doped carbon dots has received great attention, due to their wide applications in oxygen reduction reaction, cell imaging, sensors, and drug delivery. Herein, nitrogen-doped, carbon-rich, highly photoluminescent carbon dots have been synthesized for the first time from ammonium citrate under hydrothermal conditions. The obtained nitrogen-doped carbon dots possess bright blue luminescence, short fluorescence lifetime, pH-sensitivity and excellent stability at a high salt concentration. They have potential to be used for pH sensors, cell imaging, solar cells, and photocatalysis.
authors.affiliation: Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai 200240, P. R. China. haowei@sjtu.edu.cn yfzhang@sjtu.edu.cn.
authors.forename: Zhi
authors.initials: Z
authors.lastname: Yang
authors.forename: Minghan
authors.initials: M
authors.lastname: Xu
authors.forename: Yun
authors.initials: Y
authors.lastname: Liu
authors.forename: Fengjiao
authors.initials: F
authors.lastname: He
authors.forename: Feng
authors.initials: F
authors.lastname: Gao
authors.forename: Yanjie
authors.initials: Y
authors.lastname: Su
authors.forename: Hao
authors.initials: H
authors.lastname: Wei
authors.forename: Yafei
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D015374:Biosensing Techniques; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D019343:Citric Acid / Q000737:chemistry*; D016503:Drug Delivery Systems; D006863:Hydrogen-Ion Concentration; D049449:Luminescence; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology / Q000379:methods; D009584:Nitrogen / Q000737:chemistry*; D010316:Particle Size; D010777:Photochemistry / Q000379:methods*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D012492:Salts / Q000737:chemistry; D012995:Solubility; D017550:Spectroscopy, Fourier Transform Infrared; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D000644:Quaternary Ammonium Compounds; D012492:Salts; D014867:Water; D019343:Citric Acid; D002244:Carbon; C481046:ammonium citrate; D009584:Nitrogen