Semaltianos, N. G. and Logothetidis, S. and Perrie, W. and Romani, S. and Potter, R. J. and Edwardson, S. P. and French, P. and Sharp, M. and Dearden, G. and Watkins, K. G. (2010) Silicon nanoparticles generated by femtosecond laser ablation in a liquid environment. Journal of Nanoparticle Research, 12 (2). pp. 573-580.
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Silicon nanoparticles were generated by femtosecond laser [387Â nm, 180Â fs, 1Â kHz, pulse energyÂ =Â 3.5Â Î¼J (fluenceÂ =Â 0.8Â J/cm2)] ablation of silicon in deionized water. Nanoparticles with diameters from ~5 up to ~200Â nm were observed to be formed in the colloidal solution. Their size distribution follows log-normal function with statistical median diameter of â20Â nm. Longer ablation time leads to a narrowing of the nanoparticle size distribution due to the interaction of the ablating laser beam with the produced nanoparticles. Raman spectroscopy measurements confirm that the nanoparticles exhibit phonon quantum confinement effects and indicate that under the present conditions of ablation they are partially amorphous.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||10 Feb 2010 09:10|
|Last Modified:||10 Feb 2010 09:10|
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