Stable Dispersions of Aromatic Hydrocarbon Colloidal Particles by Laser Ablation

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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.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

1235-1240

DOI:

10.4028/www.scientific.net/MSF.514-516.1235

Citation:

S. Köstler et al., "Stable Dispersions of Aromatic Hydrocarbon Colloidal Particles by Laser Ablation", Materials Science Forum, Vols. 514-516, pp. 1235-1240, 2006

Online since:

May 2006

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$35.00

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