Suppression of surface plasmon resonance in Au nanoparticles upon transition to the liquid state

Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1364/OE.24.026851

Ключевые слова: Electron scattering, Gold, Lattice constants, Liquids, Melting, Metal nanoparticles, Nanoparticles, Surface plasmon resonance, Electron phonon couplings, Experimental spectra, Experimental values, Gold Nanoparticles, Nonlinear optical response, Plasmonic nanoparticle, Relaxation constants, Surface plasmon frequency, Plasmons

Аннотация: Significant suppression of resonant properties of single gold nanoparticles at the surface plasmon frequency during heating and subsequent transition to the liquid state has been demonstrated experimentally and explained for the first time. The results for plasmonic absorption of the nanoparticles have been analyzed by means of Mie theory using experimental values of the optical constants for the liquid and solid metal. The good qualitative agreement between calculated and experimental spectra support the idea that the process of melting is accompanied by an abrupt increase of the relaxation constants, which depends, beside electron-phonon coupling, on electron scattering at a rising number of lattice defects in a particle upon growth of its temperature, and subsequent melting as a major cause for the observed plasmonic suppression. It is emphasized that observed effect is fully reversible and may underlie nonlinear optical responses of nanocolloids and composite materials containing plasmonic nanoparticles and their aggregates in conditions of local heating and in general, manifest itself in a wide range of plasmonics phenomena associated with strong heating of nanoparticles. (C) 2016 Optical Society of America

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Выпуск журнала: Vol. 24, Is. 23

Номера страниц: 26851-26856

ISSN журнала: 10944087

Место издания: WASHINGTON



  • Gerasimov V.S. (Siberian Federal University)
  • Ershov A.E. (Siberian State Aerospace University)
  • Gavrilyuk A.P. (Institute of Computational Modeling,Federal Research Center KSC SB RAS)
  • Karpov S.V. (Kirensky Institute of Physics,Federal Research Center KSC SB RAS)
  • Polyutov S.P. (Siberian Federal University)
  • Agren H. (Division of Theoretical Chemistry and Biology,Royal Institute of Technology)

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