Investigation of nanoparticle formation in a plasma produced by femtosecond laser ablation of gold

Details Investigation of nanoparticle formation in a plasma produced by femtosecond laser ablation of gold Investigation of nanoparticle formation in a plasma produced by femtosecond laser ablation of gold

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..799..197s&link_type=abstract

NEW VISTAS IN DUSTY PLASMAS: Fourth International Conference on the Physics of Dusty Plasmas. AIP Conference Proceedings, Volum

Physics

1

Plasma Production By Laser, Plasma Heating By Laser, Plasma Diagnostics, Laser Ablation, Particle Size Measurement, Plasma Production And Heating By Laser Beams, Optical Measurements, Particle Measurements, Laser Ablation

Scientific paper

The formation of nanoparticles in a plasma produced by the interaction of ultrashort laser pulses with gold has been investigated. Three different experimental techniques were employed. (i) The plume expansion was characterized using fast imaging with the aid of an intensified charge-coupled device. (ii) The plasma composition was analyzed using time- and space-resolved optical emission spectroscopy. (iii) The ablated material was deposited on mica substrates and analyzed by means of atomic force microscopy. As a result, the size-distribution and the overall number of nanoparticles were determined as a function of the laser energy density incident on the target surface. The detection of particles with sizes in the nanometer range supports theoretical modeling according to which phase explosion is the dominant mechanism of metal ablation by ultrashort laser pulses.

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