期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 13, 期 12, 页码 7247-7252出版社
SPRINGER
DOI: 10.1007/s11051-011-0638-y
关键词
Carbon nanoparticle; Laser ablation in liquid; Size control; Photoluminescence; Thermodynamic theory
资金
- National Natural Science Foundation of China [50902126, 51172214]
- Shanxi Province Science Foundation for Youths [2009021027]
- Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi
Carbon quantum dots (C-dots) with average sizes of about 3, 8, and 13 nm were synthesized by laser irradiation of graphite flakes in polymer solution. The obtained C-dots display size and excitation wavelength dependent photoluminescence behavior. The size control of C-dots can be realized by tuning laser pulse width. The original reason could be the effects of laser pulse width on the conditions of nucleation and growth of C-dots. Compared with short-pulse-width laser, the long-pulse-width laser would be better fitted to the size and morphology control of nanostructures in the different material systems.
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