Laser synthesis and size tailor of carbon quantum dots

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...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2011-12, Vol.13 (12), p.7247-7252
Main Authors: Hu, Shengliang, Liu, Jun, Yang, Jinlong, Wang, Yanzhong, Cao, Shirui
Format: Article
Language:English
Subjects:
Carbon
Characterization and Evaluation of Materials
Chemistry and Materials Science
Inorganic Chemistry
Irradiation
Lasers
Materials Science
Nanocomposites
Nanomaterials
Nanoparticles
Nanostructure
Nanotechnology
Optical Devices
Optics
Photonics
Physical Chemistry
Polymers
Pulse width
Quantum dots
Research Paper
Tuning
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Description
Summary: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.
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-011-0638-y