Volume 79, Number 3, August 2007
Article Number 35002
Number of page(s) 6
Section Physics of Gases, Plasmas and Electric Discharges
Published online 20 July 2007
EPL, 79 (2007) 35002
DOI: 10.1209/0295-5075/79/35002

Expansion of an ablation plume in a buffer gas and cluster growth

A. Bailini and P. M. Ossi

Dipartimento di Ingegneria Nucleare, Centre of Excellence "Nano Engineered MAterials and Surfaces - NEMAS", Politecnico di Milano - Via Ponzio 34-3, 20133, Milano, Italy

received 14 March 2007; accepted in final form 20 June 2007; published August 2007
published online 20 July 2007

The mixed propagation model is introduced to describe the expansion through a buffer gas of the plasma produced by pulsed-laser ablation. After testing the model against the results of representative experiments, the deduced expansion parameter values are used to model the growth of clusters that are nucleated in the plume. For plumes of silicon and tungsten propagating in helium as well as of tantalum propagating in oxygen cluster size is evaluated and compared (silicon; tungsten) with experimental data.

52.38.Mf - Laser ablation.
82.33.Xj - Plasma reactions (including flowing afterglow and electric discharges).
81.07.-b - Nanoscale materials and structures: fabrication and characterization.

© Europhysics Letters Association 2007