Cluster formation through the action of a single picosecond laser pulse

N R Madsen, E G Gamaly, A V Rode, B Luther-Davies
2007 Journal of Physics, Conference Series  
We demonstrate experimentally and describe theoretically the formation of carbon nanoclusters created by single picosecond laser pulses. We show that the average size of a nanocluster is determined exclusively by single laser pulse parameters and is independent of the gas fill (He, Ar, Kr, Xe) and pressure in a range from 20mTorr to 200 Torr. Simple kinetic theory allows estimates to be made of the cluster size, which are in qualitative agreement with the experimental data. We conclude that the
more » ... role of the buffer gas is to induce a transition between thin solid film formation on the substrate and foam formation by diffusing the clusters through the gas, with no significant effect upon the average cluster size.
doi:10.1088/1742-6596/59/1/163 fatcat:hoi3g4eu2zbn3p5ixzml6pfmgi