Carbon quantum dots: synthesis, characterization, and assessment of cytocompatibility
A simple method for the synthesis of water-soluble carbon quantum dots (CQDs) has been developed by chemical oxidation treatment of the flour. The as-synthesized CQDs were monodispersed sphere particles with the approximate diameter of 5–8 nm, and exhibited strong fluorescence, excitation-dependent photoluminescence behavior and high photostability in a wide range of pH values. We investigated the cytotoxicity of as-prepared CQDs using rat mesangial cells (RMC). Compared with CdTe quantum dots, CQDs show no apparent cytotoxicity and much better biosafety property. The as-synthesized CQDs were also tested to label and image RMC in vitro and demonstrated to be highly promising biological fluorescent probes.
KeywordsTellurium Powder Potassium Periodate Monodispersed Sphere Particle Bright Blue Fluorescence Dulbecco Minimum Essential Medium
This work was supported by The Research and Innovation Project for Graduate Students Academic Degree of Colleges and Universities of Jiangsu Province (KYZZ_0185) and The National Natural Science Foundation of China (NSFC 81274056).