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

Machulianskyi, O.

doi:10.20535/2523-4455.2018.23.1.126231

Cited by 3 publications

(8 citation statements)

References 11 publications

(20 reference statements)

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“…In the continuation of the investigations of the optical properties of nanoparticles in statistical inhomogeneous systems that we started in [24,27] with the help of an experimental analytical method, the optical characteristics of nanosized copper particles in a two-dimensional system islet copper film on a quartz substrate are determined. It is shown that taking into account the analysis of the particle size distribution in the experimental-analytical method makes it possible to apply this approach to nanostructured systems with a statistically inhomogeneous structure and reliably estimate their optical parameters.…”

Section: Discussionmentioning

confidence: 99%

“…The values of copper nanoparticle complex specific electric polarizability are determined by experimentalanalytical method, taking into account the analysis of the particle distribution by size statistics [24]. The method is based on experimental studies of microstructure and spectrophotometric measurements of reflection transmission coefficients on two-dimensional systems and analytical solution of the inverse problem of the spectrophotometric system of Rosenberg equations, taking into account the function of nanoparticles distribution by size.…”

Section: Methodology and Materials Of The Experi-mentmentioning

confidence: 99%

“…The choice of a physically substantiated solution from the possible mathematical roots of α in the studied range of the spectrum is carried out in accordance with the principles presented in [24].…”

Section: Methodology and Materials Of The Experi-mentmentioning

confidence: 99%

“…In addition, with the further development of the experimental-analytical approach, the method of α nanoparticles value determining in the systems with a statistically inhomogeneous structure is improved by taking into account the statistical analysis of the particle distribution by size. It is shown that the advanced experimental-analytical method application made it possible to increase the accuracy of obtaining the experimental values of α nanoparticles [24].…”

Section: мікросистеми та фізична електронікаmentioning

confidence: 99%

“…The proposed methodology and developed analytical and calculating apparatus in [23,24] made it possible to determine the nanoparticles electromagnetic parameters in real nanostructured systems and optimize the technological processes regimes of their formation.…”

Section: мікросистеми та фізична електронікаmentioning

confidence: 99%

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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: Discussionmentioning

confidence: 99%

Section: Methodology and Materials Of The Experi-mentmentioning

confidence: 99%

Section: Methodology and Materials Of The Experi-mentmentioning

confidence: 99%

Section: мікросистеми та фізична електронікаmentioning

confidence: 99%

Section: мікросистеми та фізична електронікаmentioning

confidence: 99%

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

Machulianskyi

2018

Mìkrosist. elektron. akust.

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Effect of the Thickness of Nanoscale Layers of the Metal-Dielectric Structure on Its Optical Characteristics

Hetmanchuk

Machulianslyi

2022

Microsyst., Electron. & Acoust.

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A biosensor is a device which uses a mixture of biological and physicochemical components to detect molecular-level interactions. Essentially, biosensors detect the change in physical properties which occur when an immobilized biological molecule, such as an antibody or a protein, binds to their target analyte. A number of methods have been developed to determine interactions between bioreceptors and their analytes, many of which are based on the principle of Surface Plasmon Resonance, or SPR. The ubiquity of SPR comes from its inherent advantages; it allows real time, highly sensitive monitoring of a wide range of molecular interactions, without the requirement for additional labelling of samples. Surface Plasmon Resonance is caused by the interaction of electromagnetic radiation and the free-flowing cloud of electrons within a metal, a process which induces electromagnetic waves and, under certain conditions, resonance effects. Alterations in the physical conditions at the surface have a significant effect on this resonance, and the detection of these changes form the basis of the SPR biosensor. In the work, the effect of the thickness of the layers of the metal-dielectric structure on its optical characteristics was studied. The simulation was carried out for the Krechman configuration, which is a glass prism on which a multilayer metal-dielectric structure is applied. AuSiO2 was used as a metal-dielectric structure, and a laser beam with a wavelength of 633 nm was used as a source of external electromagnetic radiation. The thickness of the gold film varied from 1 to 60 nanometers. The lowest value of the reflection coefficient is reached at a thickness of 50 nm. The thickness of the silicon dioxide film varied from 1 to 30 nm. When the thickness of the dielectric layer is up to 10 nm, its influence on the optical characteristics is insignificant. Macroscopic values of parameters were used in the study, but it is known that real parameters differ greatly from macroscopic ones. To increase the accuracy of modeling the sensor element in further studies, it will be necessary to take into account dimensional changes in the optical parameters of the nanosized metal component in the structure of the sensor element.

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The Influence of the Structural Parameters of the Materials of the Sensitive Element of the Optical Sensor on Its Sensory Properties

Гетманчук Віктор,

Мачулянський Олександр

2023

ПТП

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The sensor element of an optical sensor based on surface plasmon resonance is investigated in the paper. In particular, the influence of the components of the sensor element on its sensor properties by modeling design options. The Kretschmann configuration was chosen as the model, which is a glass prism with a multilayer nanoscale structure applied to one face. It was established that the material of the prism affects only the resonance angle of the structure. The thickness of nanoscale gold and silver films varied from 1 to 100 nm. The minimum value of the coefficient was obtained when the thickness of the gold and silver nanoscale films was 50 nm and 45 nm, respectively. The thickness of the silicon dioxide film varied from 10 to 150 nm. In the Au – SiO2 structure, the addition of silicon dioxide improved the optical properties of the multilayer structure. The minimum value of the reflection coefficient has decreased, but the thickness of the silicon dioxide is 3 nm. When the thickness of the dielectric layer increases, the optical properties of the structure deteriorate. The structure of the sensitive element, which uses a nanosized silver film, almost does not change its optical properties when adding a layer of SiO2, its thickness can reach 50 nm.

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

Cited by 3 publications

References 11 publications

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

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

Effect of the Thickness of Nanoscale Layers of the Metal-Dielectric Structure on Its Optical Characteristics

The Influence of the Structural Parameters of the Materials of the Sensitive Element of the Optical Sensor on Its Sensory Properties

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