Modeling of metal-dielectric nanocomposite coatings with ferromagnetic inclusions for electromagnetic protection of electronic devices

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

doi:10.1109/elnano.2014.6873955

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…Nanocomposite systems based on nanosized metal particles are of particular interest for integrated technology, optoelectronics, informatics, and energy [1]- [3]. The prospects of using nickel nanoparticles to create: electromagnetic filters, miniature laser emitters, light modulators, photosensitive materials, protective and thermoregulatory coatings, high-speed optical devices, magnetic memory elements, high-sensitivity optical sensors and increasing the efficiency of renewable energy sources were noted in [4]- [6]. These applied and fundamental aspects cause considerable attention to the study of the optical properties of nickel nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Optical properties of nickel nanoparticles in systems with a statistically inhomogeneous structure

Machulianskyi

2018

Mìkrosist. elektron. akust.

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The analysis and further development of the experimental-analytical approach for determining the values of the optical parameters of nanosized particles for a system with a statistically inhomogeneous structure is presented. An improved experimental-analytical method for determining the complex specific electric polarizability of nanosized particles in systems with a statistically inhomogeneous structure is based on spectrophotometric and electron-microscopic measurements on two-dimensional structures and application of analytical solution of Rosenberg's spectrophotometric equations with the consideration of analysis of particle size distribution.Experimental spectrophotometric and electron-microscopic studies of nickel islet films with weight thickness from 0.3 nm to 2.0 nm deposited by high-vacuum sputtering on quartz substrates in the range of the spectrum 0.2 ÷ 1, 1 μm are performed. Islands nickel film presented morphological microstructure in the form of monolayers isolated from each other nanoislands spherical surface nickel concentration (0.8 ÷ 2.0) • 10 12 cm -2 and an average particle diameter 2.5 ÷ 7 nm.The optical characteristics, namely, the complex specific electric polarizability, optical electric conductivity of nanosized nickel particles are determined in the spectral range 0.2 ÷ 1.1 μm with the help of the improved experimental-analytical method. A significant increase to one order of magnitude of the absolute values of complex specific electric polarizability of nickel particles with a decrease in their size and in comparison with absolute values of complex specific electric polarizability of model spheres with refractive index and absorption index of nickel in macroscopic volumes was revealed. It is established that in the spectral dependences of optical electric conductivity of nickel nanoparticles in the range 0.2 ÷ 1.1 μm there is a band that diminishing size is shifted to a high-frequency region. In this case, the value of optical electric conductivity of nickel nanoparticles monotonically decreases with a decrease in the size by 1-2 orders of magnitude. Comparison of the obtained values of optical electric conductivity of particles in the range of the considered interval with the values of optical electric conductivity of macroscopic samples of nickel in the studied range of the spectrum shows that in particles the value of optical electric conductivity is 2-3 orders of magnitude smaller than that of bulk metals. It is shown that in the nanoparticles of nickel absorption of "Drude" type in the near infrared region the spectrum is suppressed. The reason for this phenomenon may be the change of the mechanism of low-frequency electromagnetic response in nanosized metal particles in comparison with macroscopic metals.The research results are of interest for the development and optimization of nanostructured systems with the inclusion of nanosized nickel particles and functional devices based on them with given electromagnetic characteristics.Ref. 22, fig. 4.

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Section: Introductionmentioning

confidence: 99%

Optical properties of nickel nanoparticles in systems with a statistically inhomogeneous structure

Machulianskyi

2018

Mìkrosist. elektron. akust.

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“…The determination and reproducibility of electromagnetic parameters in real nanosized structures is a significant problem of nanostructured systems usage in the design and production of functional devices of different application [2,29,30].…”

Section: мікросистеми та фізична електронікаmentioning

confidence: 99%

“…Nanosized metal particles and nanostructured metaldielectric systems on their basis have a number of nonlinear optical effects. It determines a widespread practical application of these structures in optoelectronics [1], information security and transmission systems [2], photoelectric and photothermal energy converters for energysaving technologies [3,4]. The example of nanostructured metal-dielectric system future usage is the optical waveguides for interconnections at the upper levels of integrated circuits [5].…”

Section: Introductionmentioning

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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Dielectric spectroscopy of microwave-absorbing materials

Poplavko

2021

Dielectric Spectroscopy of Electronic Materials

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Modeling of metal-dielectric nanocomposite coatings with ferromagnetic inclusions for electromagnetic protection of electronic devices

Cited by 6 publications

References 4 publications

Optical properties of nickel nanoparticles in systems with a statistically inhomogeneous structure

Optical properties of nickel nanoparticles in systems with a statistically inhomogeneous structure

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

Dielectric spectroscopy of microwave-absorbing materials

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