naa a22 4500 510816630 CHVBK 20180411083510.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-013-9500-7 doi (NATIONALLICENCE)springer-10.1007/s11468-013-9500-7 Nonlinear Dependences of Optical Properties of Spherical Core-Shell Silver-Gold and Gold-Silver Nanoparticles on Their Parameters [Elektronische Daten] [Victor Pustovalov, Wolfgang Fritzsche] Modeling of nonlinear optical properties of spherical core-shell gold-silver and silver-gold nanoparticles (NPs) placed in water was carried out on the base of extended Mie theory. Efficiency cross sections of absorption σ abs, scattering σ sca, and extinction σ ext of radiation with wavelengths λ = 400 and 532nm for core-shell NPs with constant core radii r 00 = 5, 10, 20, and 40nm and in the range of relative radii r 1/r 00 = 1-8 were calculated (r 1 is the radius of shell). Dependences of optical properties of gold-silver and silver-gold NPs on increasing of core radius r 0 in the range 0 − r 1 under condition r 1 = const and increasing of r 0 under r 1 − r 0 = const were investigated. Results show the nonlinear behavior of optical properties of core-shell gold-silver and silver-gold NPs on radiation wavelengths (optical indexes of metals), different core and shell radii, and their correlation, on relative NP radii r 1/r 00. An increase and decrease of absorption, scattering, and extinction efficiency cross sections of core-shell NPs with changing of wavelengths, core and shell radii, and relative NP radii r 1/r 00 are established. These dependences can be used for experimental investigation of the interesting first stages of shell formation on core and optical determination of core-shell NP parameters. Springer Science+Business Media New York, 2013 Nanoparticle nationallicence Gold nationallicence Silver nationallicence Optical properties nationallicence Nonlinear dependences nationallicence Pustovalov Victor Belarusian National Technical University, 220013, Minsk, Belarus aut Fritzsche Wolfgang Institute of Photonic Technology, 07745, Jena, Germany aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 983-993 1557-1955 8:2<983 2013 8 11468 https://doi.org/10.1007/s11468-013-9500-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-013-9500-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pustovalov Victor Belarusian National Technical University, 220013, Minsk, Belarus aut NATIONALLICENCE 700 1- Fritzsche Wolfgang Institute of Photonic Technology, 07745, Jena, Germany aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 983-993 1557-1955 8:2<983 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer