Title: Optical and thermal effects in the neighborhood of the spherical layered nanoparticle of the ``metallic core – J-aggregate shell'' structure
Author(s):

	A. V. Korotun (National University Zaporizhzhia Polytechnic, 64 Zhukovsky Str., Zaporizhzhia, 69063, Ukraine; G. V. Kurdyumov Institute for Metal Physics of National Academy of Sciences of Ukraine, 36 Academician Vernadsky Blvd., Kyiv, 03142, Ukraine),
	N. A. Smirnova (National University Zaporizhzhia Polytechnic, 64 Zhukovsky Str., Zaporizhzhia, 69063, Ukraine) ,
	V. I. Reva (National University Zaporizhzhia Polytechnic, 64 Zhukovsky Str., Zaporizhzhia, 69063, Ukraine),
	I. M. Titov (UAD Systems, 84 Olexandrivska Str., 69002, Zaporizhzhia, Ukraine),
	G. M. Shilo (Zaporizhzhia National University, 66 Zhukovsky Str., 69600, Zaporizhzhia, Ukraine)

The relations for the polarizability of the metallic nanoparticles, coated with the shell of cyanine dyes, are obtained in the article. The frequency dependencies for light absorption and scattering efficiencies, the heating of the composite nanoparticle and the electric field amplification in its neighborhood are studied. It is established that all the dependencies have three maxima which correspond to the frequencies of hybrid plasmon-exciton resonance. It is shown that an increase in content of metal in the nanoparticle causes a blue shift of the maxima from the visible part of the spectrum and a red shift of the maximum from ultraviolet frequency range. The issue of application of metal-organic nanoparticles in nanomedicine, in particular for the photothermal therapy of malignant neoplasms is studied.

Key words: composite nanoparticles, J-aggregate, plasmon-exciton resonances, polarizability, absorption and scattering efficiencies

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