Counting of particles in aqueous solutions by laser-induced photoacoustic breakdown detection

Authors / Editors

Research Areas

No matching items found.

Publication Details

Output type: Journal article

Author list: Scherbaum F., Knopp R., Kim J.

Publisher: Springer Verlag (Germany)

Publication year: 1996

Journal: Applied Physics B: Lasers and Optics (0946-2171)

Volume number: 63

Issue number: 3

Start page: 299

End page: 306

Number of pages: 8

ISSN: 0946-2171

eISSN: 1432-0649

URL: http://api.elsevier.com/content/abstract/scopus_id:0030247497

Abstract

Laser-induced photoacoustic breakdown detection is applied for the determination of particles in aqueous dispersion. Polystyrene (latex), alumina and thoriasol particles of different sizes are investigated for demonstration. Laser pulses at 500 nm with 28 ns pulse width (FWHM), generated by an excimer (λ = 308 nm) pumped dye laser, are focused into aqueous particle dispersions to produce breakdown. The dye laser pulse energy is fixed at a value lower than the breakdown threshold of pure water to initiate a dielectric breakdown only when particles are present in a given focus volume. Focus volume parameters and particle size dependent breakdown thresholds are calculated and the results are compared with data from literature. Dependence of breakdown threshold values on the chemical composition of the particles is determined for polystyrene, alumina and thoriasol particles.

Keywords

No matching items found.

Documents

No matching items found.