Wissenschaftliche Publikation

Stable Dispersions of Aromatic Hydrocarbon Colloidal Particles by Laser Ablation

Publikation aus Materials

Köstler Stefan, Mag. Andreas Rudorfer, Berghauser Roswitha, DI Dr. Georg Jakopic, Ribitsch Volker

Materials Science Forum 514-516: 1235-1240. , 2006


Dispersions of colloidal particles of polycyclic aromatic hydrocarbons were obtained by
nanosecond laser ablation. Aqueous suspensions of micron-sized crystals were irradiated with the
second harmonic output of a Nd:YAG laser and converted into colloidal particles. Ionic and nonionic
surfactants were used in the ablation process to stabilise the particles. Dispersions with good
long term stability were obtained. A strong dependence of particle formation rate on laser fluence
was found and the particle formation process is discussed on the basis of UV-Vis spectra and
microscopic examination of the crystals.


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