Laser synthesis and size tailor of carbon quantum dots
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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.
KeywordsCarbon nanoparticle Laser ablation in liquid Size control Photoluminescence Thermodynamic theory
This study was financially supported by the National Natural Science Foundation of China (Nos. 50902126, 51172214), Shanxi Province Science Foundation for Youths (No. 2009021027), and Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi.
- Chen CQ, Shi Y, Zhang YS, Zhu J, Yan YJ (2006) Size dependence of Young’s modulus in ZnO nanowires. Phys Rev Lett 96:075505(1–4)Google Scholar
- Gregorčič P, Petkovšek R, Možina J (2007) Investigation of a cavitation bubble between a rigid boundary and a free surface. J Appl Phys 102:094904(1–8)Google Scholar
- Lakowicz RZ (1999) Principles of fluorescence spectroscopy, 2nd edn. Klumer Academic/Plenum Publishers, New YorkGoogle Scholar
- Park KH, Im SH, Park OO (2011) The size control of silver nanocrystals with different polyols and its application to low-reflection coating materials. Nanotechnology 22:045602 (1–6)Google Scholar