Optodynamic phenomena in aggregates of polydisperse plasmonic nanoparticles


Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1007/s00340-013-5636-6

Ключевые слова: Aggregates, Heat exchangers, Laser radiation, Nanoparticles, Polydispersity, Coupled dipole method, Electron relaxation, Inter-particle medium, Light-induced process, Metallic nanoparticles, Monodisperse nanostructures, Plasmonic nanoparticle, Temperature dependence, Agglomeration

Аннотация: We propose an optodynamical model of interaction of pulsed laser radiation with aggregates of spherical metallic nanoparticles embedded into host media. The model takes into account polydispersity of particles, pair interactions between the particles, dissipation of absorbed energy, heating and melting of the metallic core of partiПоказать полностьюcles and of their polymer adsorption layers, and heat exchange between electron and ion components of the particle material as well as heat exchange with the interparticle medium. Temperature dependence of the electron relaxation constant of the particle material and the effect of this dependence on interaction of nanoparticles with laser radiation are first taken into consideration. We study in detail light-induced processes in the simplest resonant domains of multiparticle aggregates consisting of two particles of an arbitrary size in aqueous medium. Optical interparticle forces are realized due to the light-induced dipole interaction. The dipole moment of each particle is calculated by the coupled dipole method (with correction for the effect of higher multipoles). We determined the role of various interrelated factors leading to photomodification of resonant domains and found an essential difference in the photomodification mechanisms between polydisperse and monodisperse nanostructures.

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Выпуск журнала: Vol. 115, Is. 4

Номера страниц: 547-560

ISSN журнала: 09462171

Место издания: NEW YORK

Издатель: SPRINGER


  • Ershov A.E. (L.V. Kirenski Institute of Physics, Russian Academy of Sciences)
  • Karpov S.V. (Siberian Federal University)
  • Semina P.N. (L.V. Kirenski Institute of Physics, Russian Academy of Sciences)
  • Gavrilyuk A.P. (Siberian Federal University)

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