Nano Archive

Silicon nanoparticles generated by femtosecond laser ablation in a liquid environment

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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Abstract

Silicon nanoparticles were generated by femtosecond laser [387 nm, 180 fs, 1 kHz, pulse energy = 3.5 μJ (fluence = 0.8 J/cm2)] ablation of silicon in deionized water. Nanoparticles with diameters from ~5 up to ~200 nm were observed to be formed in the colloidal solution. Their size distribution follows log-normal function with statistical median diameter of ≈20 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.

Item Type:Article
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
ID Code:8220
Deposited By:JNCASR
Deposited On:10 Feb 2010 09:10
Last Modified:10 Feb 2010 09:10

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