I. D. Stolyarchuk

I. D. Stolyarchuk
Drohobych Ivan Franko State Pedagogical University · Department of Physics

Professor

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38
Publications
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116
Citations

Publications

Publications (38)
Article
Abstract The model of spherical quantum dot of the core/multilayer shell type, which is subjected to external comprehensive pressure, is constructed taking into account the mismatch between the lattice parameters of the contacting layers and the pressure due to the curvature of the surface. Within the method of the deformation potential, the influe...
Article
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The model of self-consistent spatial redistribution of the interstitial zinc and the oxygen vacancies in the ZnO semiconductor under the influence of pulsed laser irradiation in deformation and temperature fields is constructed. The proposed model takes into account the diffusion of dot defects in the nonuniform deformation field created by its own...
Article
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We report a study of the Pb1-xMnxI2 nanoparticles using electron paramagnetic resonance (EPR). The nanocomposites containing the diluted magnetic semiconductor nanocrystals of Pb1-xMnxI2 with x in the range from 0 to 0,15 have been prepared by embedding them into polyvinylalcohol matrices using colloidal technology. The EPR spectra of nanocrystals...
Article
В роботі представлено результати дослідження спектрів електронного парамагнітного резонансу (ЕПР) наночастинок Pb1-xMnxI2. Нанокомпозити із наночастинками магніторозчиненого напівпровід- ника Pb1-xMnxI2 із вмістом магнітної компоненти x в діапазоні від 0 до 0,15 були отримані шляхом впровадження останніх в матрицю на основі полівінілового спирту ме...
Article
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The II–VI nanocrystallites (NCs) are well known as a great fluorescent probe, but one of the main problem is a toxic effect. Covering a semiconductor NCs by some materials or chemicals can reduce it, but change optical properties and functional characteristics of NCs. The potential ability of the CdTe NCs passivated by human serum albumin (HSA) to...
Article
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We have reported the effect of Co and Ni doping on structural and optical properties of ZnO thin films prepared by RF reactive sputtering technique. The composite targets were formed by mixing and pressing of ZnO, Mn3O4, CoO and NiO powders. The thin films were deposited on sapphire, quartz and glass substrates. The structure study confirms the for...
Article
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Quantum dots, due to their unique optical properties, constitute significant materials for many areas of nanotechnology and bionanotechnology. This work presents a review of researches dedicated to the interaction between quantum dots (QDs) with human serum albumin (HSA) and human cell culture as important for nanomedicine applications. The optical...
Article
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The interaction between CdTe quantum dots (QDs) with human serum albumin (HSA) and human cell culture was studied by optical spectroscopy technique. Performed research explored the interaction between the CdTe QDs and HSA, and fluorescence imaging efficiency of the QD-HSA bioconjugates in comparison with colloidal QDs. The secondary structure of th...
Article
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The interaction between CdS , CdTe nanoparticles and human serum albumin (HSA) was studied by absorption and photoluminescence spectroscopy. The performed transmission electron microscopy (TEM) analysis suggests of spherical shape of nanostructures with small size distribution. In the absorption spectra of the colloidal nanoparticles exciton band w...
Article
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CdS, CdTe, ZnO, and ZnO:Co nanocrystals and related hybrid nanostructures, in which the nanoparticles combined with graphene, have been studied. Different chemical approaches for synthesis of II-VI semiconductor nanocrystal-graphene hybrids have been applied depending on chemical composition. Transmission electron microscopy characterizations prove...
Research
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The interaction between CdTe quantum dots (QDs) and human serum albumin (HSA) was studied by absorption and photoluminescence spectroscopy.
Conference Paper
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Two-dimensional (2D) materials such as GaSe, InSe, and WSe 2 in form of bulk crystal and few-layer sheets have been prepared by mechanical exfoliation method. Atomic force microscopy (AFM) analysis was used for the study of surface morphology and estimation of thic knesses of the exfoliated thin semic onductor layers. Optical absorption and magneto...
Conference Paper
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Results of study of two members of diluted magnetic semiconductor (DMS) family, namely Cd1-xMnxTe and Zn1-xMnxO, which are in form of micro- and nanoparticles generated by pulsed laser ablation in liquid medium (PLAL), have been presented. The structural analysis using X-ray diffraction (XRD) of nanocrystals indicated that Mn has entered the AIIBVI...
Article
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Results of study of Zn1-xCoxO nanoparticles, which were grown by pulsed laser ablation in liquid medium (PLAL), have been presented. Zn1-xCoxO nanoparticles were produced by laser ablation of ceramic plates as targets in deionized water. The structural analysis using X-ray diffraction (XRD) of nanocrystals reveals the formation of predominant (002)...
Article
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Nanoparticles of Cd1-xMnxTe have been studied by optical absorption and photoluminescence in applied magnetic field. The pulsed laser deposition technique and ball milling were used for fabrication of the samples of diluted magnetic semiconductor nanocrystals. The performed transmission electron microscopy (TEM) analysis suggests of spherical shape...
Article
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Faraday rotation has been studied for CdS, CdTe, and CdS:Mn semiconductor nanoparticles synthesized by colloidal chemistry methods. Additionally these materials were prepared in a form of semiconductor nanoparticles embedded in polyvinyl alcohol films. Transmission electron microscopy and atomic force microscopy analyses served as confirmation of n...
Conference Paper
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Nanoparticles of ZnO and ZnO doped with transition metals (Mn, Co) were synthesized by laser ablation in liquid medium. Scanning electron microscopy (SEM) showed formation of nanostructures with different shapes. Atomic force microscopy (AFM) gives information about surface morphology of the formed nanostructures. Absorption edge of ZnO, ZnO:Mn a...
Article
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In this work, colloidal CdTe nanoparticles were synthesized by using thioglycolic acid (TGA) as passivator. In the absorption spectra of the colloidal CdTe nanoparticles exciton band was found to be shifted to higher photon energy as compared with bulk crystals due to quantum confinement effect. It was shown that addition of human serum albumin (HS...
Article
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Nanocrystals of Pb1-xFexI2 with x up to 0.05 embedded in transparent polymer matrix have been studied by optical absorption, photoluminescence and electron paramagneric resonance. The composite nanostructures containing the semimagnetic semiconductor nanocrystals of Pb1-xFexI2 have been prepared by cooling to the room temperature of boiling saturat...
Article
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Zn1-xMexO (Me- Mn, Co, Ni) thin films were grown by pulsed laser deposition and rf magnetron sputtering methods. The composite targets were formed by mixing and pressing of ZnO, Mn3O4, CoO and NiO powders. The thin films were deposited on sapphire, quartz and glass substrates. The structure study confirms the formation of the hexagonal wurtzite ZnO...
Article
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Colloidal CdS:Mn semiconductor nanoctystals are synthesized by co-precipitation method using different concentrations of the CdCl2, MnCl2, Na2S precursors and the capping agent. UV-vis absorption, photoluminescence and Faraday rotation spectra were combined for monitoring the formation of nanoparticles and incorporation of Mn magnetic ions into CdS...
Article
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Pulsed laser deposition has been applied for the fabrication of Cd1–x MnxTe nanoparticle in SiO2 matrix composite material. In addition, colloid chemistry methods have been used to prepare Cd1–x MnxS nanoparticle in polyvinylalcohol matrix composite films. Transmission electron microscopy and atomic force microscopy analyses confirmed the nanocryst...
Article
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Composite films containing II-VI based semiconductor nanoparticles have been prepared by different physical and chemical techniques. Non-magnetic CdS1-xSex nanoparticles were grown by melting of the semiconductor doped fine powder borosilicate glass. The composite semimagnetic semiconductor Cd1-xMnxTe based films were fabricated by embedding in SiO...
Article
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The method of laser deposition from a composite target was used to prepare Cd1-xMnxTe nanocrystals embedded in an SiO2 dielectric matrix. A study of the Faraday effect in nanocrystals of this semimagnetic semiconductor revealed enhancement of this effect, compared with bulk crystals. This was attributed to an increase in the oscillator strengths of...
Article
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Different physical and chemical methods were used to prepare II–VI based semimagnetic semiconductor nanocrystals. A study of magneto-optical Faraday effect in the nanocrystals revealed its enhancement as compared with bulk crystals. It is explained in framework of increase in the oscillator strength of exciton transitions and to the difference betw...
Article
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The technique of pulsed laser deposition and colloidal chemistry methods have been applied for synthesis of semimagnetic semiconductor Cd1−xMnxTe nanocrystals embedded in dielectric matrix. The performed analysis suggests a narrower size distribution for the colloidal nanoparticles. Optical absorption, Faraday rotation and photoluminescence spectro...
Article
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The technique of pulsed laser deposition has been applied for growth of Cd1−xMnxTe thin films and CdTe/Cd1−xMnxTe quantum well structures. Different materials (silicon, glass, sapphire) have been used as substrates which where heated to 300 °C during deposition process. X-ray diffraction, scanning electron microscopy, optical absorption and Faraday...
Article
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Nanocrystals of PbI2 and Pb1−xMnxI2 (0<x<0.15) embedded in transparent polymer matrix have been studied by optical absorption and Faraday rotation spectroscopy. Average size of semiconductor nanoparticles was controlled by choosing polymer material and growth conditions. The obtained nanoparticles are platelet-like, with thickness up to 0.7 nm. The...
Article
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Optical absorption, Faraday rotation and Voigt phase difference in doped Cd1−xMnxTe:V and Cd1−yHgyTe:Mn,V have been studied. Introducing the V dopant increases the absorption coefficient in tail part of spectra and codoping with Mn leads to its reduction. Faraday rotation spectrum of Cd1−xMnxTe:V has features (change of the sign, large value of the...
Article
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Nanocrystals of Cd1−xMnxS, Cd1−xMnxSe and Cd1−xMnxTe semimagnetic semiconductors have been prepared by four technological techniques. Borosilicate glass, quartz, zeolite and polymer served in used methods as base dielectric matrices. Transmission electron microscopy measurements performed on different samples show the best result concerning the dis...
Article
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Single crystals of Zn1−x−yHgxMnyTe grown by a modified Bridgman method have been investigated by means of optical spectroscopy and the Faraday rotation techniques. It has been found that structural, optical and magnetooptical characteristics of the studied quaternary semimagnetic semiconductor with x=0.5, y=0.4 have good prospects for applications...
Article
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The enhanced Zeeman splitting of the absorption edge and Faraday rotation in quaternary Zn1−x−yHgxMnyTe semimagnetic semiconductors have been studied. Single zinc blende crystals with x=0.4–0.5, y=0.3–0.4 have been grown by a modified Bridgman method. The observed spin splitting and giant Faraday effect are interpreted in terms of strong s, p–d exc...
Article
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The technique of pulsed laser deposition has been applied for growth of thin films, quantum well structures and nanocrystals of Cd1−xMnxTe semimagnetic semiconductor. The advantage of this method in the case of nanocrystals is the possibility to avoid in part strong oxidation of small particles embedded in the SiO2 matrix. Characterization of the o...
Conference Paper
The effects of simultaneous presence of two different magnetic ions in quaternery Cd1-x-yMnxFeyTe semimagnetic semiconductor have been studied. For this crystal the structure of optical absorption spectrum due to the intracentre transitions in Fe2+ ions has been found. The observed dependence of the Faraday rotation on photon energy, temperature an...
Article
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The absorption spectra of CdMnTe and PbMnI2 nanocrystals embedded in polymer matrices were investigated in the temperature range from 4.2 to 300 K. The absorption edge for CdMnTe and the excitonic structure for PbMnI2 nanocrystals shift to shorter wavelengths as the average size of semiconductor particles decreases. The results are analyzed in term...
Article
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Results of optical absorption study of PbMnI2 ternary semiconductor nanocrystals embedded in a dielectric matrix are presented. The semimagnetic semiconductor nanocrystals were prepared by the solution of Pb1-xMnxI2 (x ≤ 0.1) powder in hot water. Gelatin and polyvinylalcohol were used as the polymer-stabilizer. At liquid helium temperature four exc...

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