Nonlinear optical properties of colloidal silver nanoparticles produced by laser ablation in liquids

The optical and nonlinear optical properties of colloidal solutions of silver obtained by laser ablation in water and ethanol are studied. It is shown that freshly prepared colloids experience a full or partial sedimentation by changing their nonlinear optical properties. Aqueous colloids undergo a...

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Bibliographic Details
Published in:Quantum electronics (Woodbury, N.Y.) N.Y.), 2004-07, Vol.34 (7), p.644-648
Main Authors: Karavanskii, V A, Simakin, Aleksandr V, Krasovskii, V I, Ivanchenko, P V
Format: Article
Language:English
Subjects:
ABLATION
ABSORPTION
ALCOHOLS
CHALCOGENIDES
COLLOIDS
DISPERSIONS
ELEMENTS
ETHANOL
HOMOGENEOUS MIXTURES
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
LASERS
LIGHT TRANSMISSION
METALS
MIXTURES
NANOSCIENCE AND NANOTECHNOLOGY
NANOSTRUCTURES
NONLINEAR PROBLEMS
OPTICAL PROPERTIES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHYSICAL PROPERTIES
SEDIMENTATION
SILVER
SILVER COMPOUNDS
SILVER OXIDES
SIZE
SOLUTIONS
SORPTION
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSMISSION
WATER
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Summary:The optical and nonlinear optical properties of colloidal solutions of silver obtained by laser ablation in water and ethanol are studied. It is shown that freshly prepared colloids experience a full or partial sedimentation by changing their nonlinear optical properties. Aqueous colloids undergo a partial sedimentation and their nonlinear optical absorption changes to nonlinear optical transmission. The obtained results are interpreted using the Drude model for metal particles taking the particle size into account and can be explained by the sedimentation of larger silver particles accompanied by the formation of a stable colloid containing silver nanoparticles with a tentatively silver oxide shell. The characteristic size of particles forming such a stable colloid is determined and its optical nonlinearity is estimated. (nonlinear optical phenomena)
ISSN:1063-7818
1468-4799
DOI:10.1070/QE2004v034n07ABEH002818