Optical Absorption of a Composite Based on Bimetallic Nanoparticles. Classical Approach
| Autor: | I. N. Titov, V. I. Reva, A. V. Korotun, A. A. Koval |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Nanocomposite Condensed matter physics Composite number Physics::Optics Nanoparticle Condensed Matter Physics 01 natural sciences Electromagnetic radiation Attenuation coefficient 0103 physical sciences Materials Chemistry Particle 010306 general physics Absorption (electromagnetic radiation) Bimetallic strip |
| Zdroj: | Physics of Metals and Metallography. 120:1040-1046 |
| ISSN: | 1555-6190 0031-918X |
| DOI: | 10.1134/s0031918x19090059 |
| Popis: | The absorption of electromagnetic radiation by a composite based on bimetallic nanoparticles with a “core–shell” type of structure has been analyzed using the Maxwell–Garnett theory. Expressions have been obtained for the real and imaginary parts of the dielectric function of a two-layered particle in the limiting cases of “thick” and “thin” shells. It has been established that the presence of two metals in the composition of the inclusions leads to a splitting of the maxima and minima in the frequency dependences of the dielectric function and of the coefficient of absorption of the nanocomposite. The frequency dependences of the real and imaginary parts of the dielectric function and of the coefficient of absorption of the composite with bimetallic nanoparticles of different metals have been calculated. An essential influence of both the geometric characteristics of the particles-inclusions and of their composition on the optical properties of the composite has been revealed. |
| Databáze: | OpenAIRE |
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