Laser synthesis and size tailor of carbon quantum dots |
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| Authors: | Shengliang Hu Jun Liu Jinlong Yang Yanzhong Wang Shirui Cao |
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| Institution: | (1) Key Laboratory of Instrumentation Science & Dynamic Measurement (North University of China), Ministry of Education, Science and Technology on Electronic Test and Measurement Laboratory, Taiyuan, 030051, People’s Republic of China;(2) School of Materials Science and Engineering, North University of China, Taiyuan, 030051, People’s Republic of China;(3) State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing, 100084, People’s Republic of China |
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| Abstract: | 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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