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Micromachines 2014, 5(4), 1202-1218; doi:10.3390/mi5041202

Femtosecond Laser Irradiation of Plasmonic Nanoparticles in Polymer Matrix: Implications for Photothermal and Photochemical Material Alteration

Institute of Applied Physics of Russian Academy of Sciences, 46 Ul'yanov Street, Nizhny Novgorod 603950, Russia
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Received: 14 October 2014 / Revised: 11 November 2014 / Accepted: 11 November 2014 / Published: 19 November 2014
(This article belongs to the Special Issue Laser Micro- and Nano- Processing)
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Abstract

We analyze the opportunities provided by the plasmonic nanoparticles inserted into the bulk of a transparent medium to modify the material by laser light irradiation. This study is provoked by the advent of photo-induced nano-composites consisting of a typical polymer matrix and metal nanoparticles located in the light-irradiated domains of the initially homogeneous material. The subsequent irradiation of these domains by femtosecond laser pulses promotes a further alteration of the material properties. We separately consider two different mechanisms of material alteration. First, we analyze a photochemical reaction initiated by the two-photon absorption of light near the plasmonic nanoparticle within the matrix. We show that the spatial distribution of the products of such a reaction changes the symmetry of the material, resulting in the appearance of anisotropy in the initially isotropic material or even in the loss of the center of symmetry. Second, we analyze the efficiency of a thermally-activated chemical reaction at the surface of a plasmonic particle and the distribution of the product of such a reaction just near the metal nanoparticle irradiated by an ultrashort laser pulse. View Full-Text
Keywords: plasmonic nanoparticles; gold nanoparticles; laser processing of materials; femtosecond laser pulses; photoinduced nanocomposites; two-photon absorption; photochemical processes; laser heating; thermo-activated chemical processes; polymers plasmonic nanoparticles; gold nanoparticles; laser processing of materials; femtosecond laser pulses; photoinduced nanocomposites; two-photon absorption; photochemical processes; laser heating; thermo-activated chemical processes; polymers
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Smirnov, A.A.; Pikulin, A.; Sapogova, N.; Bityurin, N. Femtosecond Laser Irradiation of Plasmonic Nanoparticles in Polymer Matrix: Implications for Photothermal and Photochemical Material Alteration. Micromachines 2014, 5, 1202-1218.

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