A comparative study on impact factors of emission: surface state, carbonaceous core, and size based on series of exactly designed P, S co-doped carbon dots

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2018-09, Vol.20 (9), p.1-10, Article 229
• Main Authors: Shen, Yifeng, Liang, Ying, Wang, Yuping, Liu, Cailin, Ren, Xianyan
• Format: Article
• Language: English
• Subjects: Acrylic acid; Ammonium; Ammonium peroxodisulfate; Carbon; Carbon dots; Characterization and Evaluation of Materials; Chemistry and Materials Science; Comparative studies; Computing time; Domains; Emission analysis; Emissions; Free radical polymerization; Free radicals; Harvesting; Inorganic Chemistry; Lasers; Luminescence; Materials Science; Molecular orbitals; Molecular structure; Molecular weight; Monomers; Nanoparticles; Nanotechnology; Optical Devices; Optics; Organic chemistry; Phosphorus; Photoluminescence; Photonics; Photons; Physical Chemistry; Polymerization; Research Paper; Sodium; Sulfur
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-018-4334-z

Heteroatoms, such as nitrogen, sulfur, and phosphorus, in surface state dedicate the passivation layer, which along with the structure of carbonaceous core (the size of conjugated sp 2 domains) and diameter in carbon dots affect the emission. To disclose the dominant one among them, two series of well-designed P, S co-doped carbon dots (P/S-CDots) possessing different particle sizes and individual chemical structures both in surface and core were prepared. As results, the concentration of sp 2 hybrid carbon atom in carbonaceous core plays the vital role in effecting the photoluminescence efficiency of carbon dots by determining the optical-harvesting ability, followed by heteroatom’s doping amount. Besides, phosphorus is superior to sulfurs regarding to improving the photoluminescence efficiency based on the calculated results of LUMO-HOMO gap. It is worth mentioning that the copolymer as precursor is very qualified in the paper, because that the structure and diameter of P, S-CDots are easy to be manipulated by managing the chain structure and molecular weight of it, which is a terpolymer prepared by free radical polymerization using acrylic phosphate, sodium methylallyl sulfonate, and acrylic acid as monomers in the presence of ammonium persulfate. Graphical abstract A comparative study on impact factors of emission