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Article Dans Une Revue Applied Surface Science Année : 2005

Dissymmetrization of micro-particle surface by laser-induced photochemical deposition

Résumé

We investigate the surface dissymmetrization of micro-sized particles by using the photochemical reduction of chromate ions induced by a strongly focused CW Ar+ laser to nucleate and grow deposits onto one hemisphere of silica beads dispersed in a chromate solution. Growth of dissymmetric coatings is performed at λ = 514 nm with laser fluences varying from 1.3 to 10.1 kW/cm2. Rescaling of the measured deposit growth laws reduces to a single master behavior predicting the desired dissymmetry. The technique can be used to tailor micro-scale dissymmetric patterns by scanning with the beam.

Domaines

Matériaux
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Dates et versions

hal-00094745 , version 1 (15-05-2009)

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Emmanuel Hugonnot, Marie-Hélène Delville, Jean-Pierre Delville. Dissymmetrization of micro-particle surface by laser-induced photochemical deposition. Applied Surface Science, 2005, 248 (1-4), pp.470-474. ⟨10.1016/j.apsusc.2005.03.066⟩. ⟨hal-00094745⟩

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