Conductivity of metal (Al, Cu)-dielectric composites and modeling of the single- and multi-layer composite coatings for microwave applications

Borisova, A.; Bondar, B.; Machulyansky, A.; Rodionov, M.; Yakymenko, Yuriy; Bovtun, V.; Kempa, M.

doi:10.1109/elnano.2014.6873936

Cited by 4 publications

(1 citation statement)

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“…silicon dioxide and aluminum oxynitride in nanocomposite systems [9,10]. In [11] it is shown that at the same time it is possible to increase and optimize the optical selectivity parameters of the metal-dielectric systems.…”

Section: мікросистеми та фізична електронікаmentioning

confidence: 99%

Specific electric polarizability of copper nanoparticles in the optical range of the spectrum

Machulianskyi

2018

Mìkrosist. elektron. akust.

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Work is devoted to a research of dimensional changes in optical properties of nanosized copper particles with sizes less than 10 nm in statistically inhomogeneous systems. Experimental spectral and dimensional dependences of the complex specific electric polarizability of nanosized copper particles with experimental-analytical method are determined in the optical spectral range from 0.2 to 1.1 μm. The values of the complex specific electric polarizability were determined by analytical solution of Rosenberg's spectrophotometric equations with the use of experimental results of spectrophotometric measurements of transmission and reflection coefficients of copper islet films and the results of electron microscopic studies of their morphological microstructure, taking into account the statistical analysis of the particle size distribution. Nanosized copper particles with a statistically inhomogeneous structure in the system of islet films on quartz substrates were obtained by vacuum-magnetron sputtering. An analysis of function of copper nanoparticles distribution in size in a system with a statistically inhomogeneous structure was carried out using the Pearson's consensus criterion.To find out the features of optical absorption of nanosized copper particles, their experimental spectral and dimensional dependences of the complex specific electric polarizability are compared with the corresponding characteristics for model particles with properties characteristic for macroscopic volumes of copper. It was found that the optical properties of nanosized copper particles differ from optical properties of copper in a macroscopic volume. An increase in the absolute values of the components of the complex specific electric polarizability of spherical nanosized copper particles with decreasing their diameter within the range from 8 nm to 3.2 nm for wavelengths of 0.2 -1.1 μm is established.The spectral dependences of optical parameters of nanosized copper particles according to well-known theories of classical and quantum dimensional effects are calculated. In order to study the nature of dimensional dependences of optical parameters of copper nanoparticles, a comparative analysis of calculated and experimental spectral and dimensional dependences of their optical parameters was carried out. It is shown that the experimental dimensional changes in the complex specific electric polarizability of copper particles in the investigated range of sizes not be due to the classical or quantum dimensional effect in the dipole approximation.Ref. 36, fig. 3.

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Section: мікросистеми та фізична електронікаmentioning

confidence: 99%