In situ measurement of adhesion force between a single microparticle and a surface using radiation pressure of pulsed laser light

A new method is proposed for analyzing the adhesion force between a single microparticle and a solid surface in air. The method is based on the µ N radiation force that is exerted on a particle by nanosecond pulsed laser light, which pulls a particle from a transparent solid surface against the adhe...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 1997-06, Vol.36 (6A), p.L721-L723
Main Authors: SASAKI, K, HORIO, K, MASUHARA, H
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Physical and chemical studies. Granulometry. Electrokinetic phenomena
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Summary:A new method is proposed for analyzing the adhesion force between a single microparticle and a solid surface in air. The method is based on the µ N radiation force that is exerted on a particle by nanosecond pulsed laser light, which pulls a particle from a transparent solid surface against the adhesion force. The strength of the force is determined on the basis of the Mie scattering theory with the critical laser intensity at which the radiation pressure and the adhesion force are balanced. This optical force measurement has the advantages of no mechanical contact, of applicability to micro∼nanometer-sized particles and of causing no perturbations on the physical and chemical conditions of a sample. The high potential of this method is clearly demonstrated in the analysis of the adhesion force between polymer latexes and glass surfaces.
ISSN:0021-4922
1347-4065
DOI:10.1143/jjap.36.l721