Oleksandr Romanyuk
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View article: Fine-Tuned Functionalizable Terpolymer Brush Nanocoating Resists Protein Adsorption and Bacterial Adhesion while Promoting Macrophage Activity and Osteoblast Proliferation
Fine-Tuned Functionalizable Terpolymer Brush Nanocoating Resists Protein Adsorption and Bacterial Adhesion while Promoting Macrophage Activity and Osteoblast Proliferation Open
Developing multifunctional biomaterial surfaces that resist biofouling while supporting cellular activity remains a significant challenge in biomedical engineering. We present a finely tuned functionalizable terpolymer brush nanocoating co…
View article: Plasmon-induced tuning of cerium oxidation states in Au@CeO<i>x</i> core@shell nanoparticles
Plasmon-induced tuning of cerium oxidation states in Au@CeO<i>x</i> core@shell nanoparticles Open
CeOx-based nanoforms are widely used in catalysis, or biomedical applications due to their redox activity and oxygen storage capacity. The key parameters determining their surface chemistry are the Ce3+/Ce4+ ratio and the ability to transi…
View article: Photoemission Study of GaN Passivation Layers and Band Alignment at GaInP(100) Heterointerfaces
Photoemission Study of GaN Passivation Layers and Band Alignment at GaInP(100) Heterointerfaces Open
To date, III-V semiconductor-based tandem devices with GaInP top photoabsorbers show the highest solar-to-electricity or solar-to-fuel conversion efficiencies. In photoelectrochemical (PEC) cells, however, III-V semiconductors are sensitiv…
View article: Surface structure of MOVPE-prepared As-modified Si(100) substrates
Surface structure of MOVPE-prepared As-modified Si(100) substrates Open
In the pursuit of high-efficiency tandem devices for solar energy conversion based on III-V-semiconductors, low-defect III-V nucleation on Si(100) substrates is essential. Here, hydrogen and arsenic are key ingredients in all growth proces…
View article: What Are the Key Factors for the Detection of Peptides Using Mass Spectrometry on Boron-Doped Diamond Surfaces?
What Are the Key Factors for the Detection of Peptides Using Mass Spectrometry on Boron-Doped Diamond Surfaces? Open
We investigated the use of boron-doped diamond (BDD) with different surface morphologies for the enhanced detection of nine different peptides by matrix-assisted laser desorption/ionisation mass spectrometry (MALDI-MS). For the first time,…
View article: Utilizing Constant Energy Difference between sp-Peak and C 1s Core Level in Photoelectron Spectra for Unambiguous Identification and Quantification of Diamond Phase in Nanodiamonds
Utilizing Constant Energy Difference between sp-Peak and C 1s Core Level in Photoelectron Spectra for Unambiguous Identification and Quantification of Diamond Phase in Nanodiamonds Open
The modification of nanodiamond (ND) surfaces has significant applications in sensing devices, drug delivery, bioimaging, and tissue engineering. Precise control of the diamond phase composition and bond configurations during ND processing…
View article: Merging of Bi-Modality of Ultrafast Laser Processing: Heating of Si/Au Nanocomposite Solutions with Controlled Chemical Content
Merging of Bi-Modality of Ultrafast Laser Processing: Heating of Si/Au Nanocomposite Solutions with Controlled Chemical Content Open
Ultrafast laser processing possesses unique outlooks for the synthesis of novel nanoarchitectures and their further applications in the field of life science. It allows not only the formation of multi-element nanostructures with tuneable p…
View article: Microfluidic Stack Reactors for the Mass Synthesis of Polymer Brushes
Microfluidic Stack Reactors for the Mass Synthesis of Polymer Brushes Open
View article: Surface Structure of Movpe-Prepared As-Modified Si(100) Substrates
Surface Structure of Movpe-Prepared As-Modified Si(100) Substrates Open
View article: ANALYSIS OF THE LOSSY IMAGE COMPRESSION ALGORITHMS
ANALYSIS OF THE LOSSY IMAGE COMPRESSION ALGORITHMS Open
The article discusses and conducts an analytical review of lossy image compression algorithms. Substantiated the relevance of the research with the help of statistical data. Considered and analyzed the color subsampling method. Reviewed, d…
View article: Photoemission study and band alignment of GaN passivation layers on GaInP heterointerface
Photoemission study and band alignment of GaN passivation layers on GaInP heterointerface Open
III-V semiconductor-based photoelectrochemical (PEC) devices show the highest solar-to-electricity or solar-to-fuel conversion efficiencies. GaInP is a relevant top photoabsorber layer or a charge-selective contact in PEC for integrated an…
View article: Combined bidirectional reflectance distribution functions usage for increasing images creation productivity
Combined bidirectional reflectance distribution functions usage for increasing images creation productivity Open
Modern computer graphics systems are characterized bythe requirements of highly-realistic and highly-productive image formation. In order to increase image formation productivity, the improvement of existing light reflectance models and th…
View article: Combining advanced photoelectron spectroscopy approaches to analyse deeply buried GaP(As)/Si(1 0 0) interfaces: Interfacial chemical states and complete band energy diagrams
Combining advanced photoelectron spectroscopy approaches to analyse deeply buried GaP(As)/Si(1 0 0) interfaces: Interfacial chemical states and complete band energy diagrams Open
View article: Clean and Hydrogen‐Adsorbed AlInP(001) Surfaces: Structures and Electronic Properties
Clean and Hydrogen‐Adsorbed AlInP(001) Surfaces: Structures and Electronic Properties Open
Total energy and electronic structure calculations based on density functional theory are performed in order to determine the atomic structure and electronic properties of clean and hydrogen‐adsorbed Al 0.5 In 0.5 P(001) surfaces. It is fo…
View article: Band energy diagrams of n-GaInP/n-AlInP(100) surfaces and heterointerfaces studied by X-ray photoelectron spectroscopy
Band energy diagrams of n-GaInP/n-AlInP(100) surfaces and heterointerfaces studied by X-ray photoelectron spectroscopy Open
Lattice matched n-type AlInP(100) charge selective contacts are commonly grown on n-p GaInP(100) top absorbers in high-efficiency III-V multijunction solar or photoelectrochemical cells. The cell performance can be greatly limited by the e…
View article: AlInP(001) surface structure and electronic properties
AlInP(001) surface structure and electronic properties Open
Total-energy and electronic structure calculations based on density-functional theory are performed in order to determine the atomic structure and electronic properties of Al0.5In0.5P(001) surfaces. It is found that most of the stable surf…
View article: AlInP(001) surface structure and electronic properties
AlInP(001) surface structure and electronic properties Open
Total-energy and electronic structure calculations based on density-functional theory are performed in order to determine the atomic structure and electronic properties of Al0.5In0.5P(001) surfaces. It is found that most of the stable surf…
View article: THE DEVELOPMENT OF THE MODIFIED SCHLICK MODEL FOR THE SPECULAR COLOR COMPONENT CALCULATION
THE DEVELOPMENT OF THE MODIFIED SCHLICK MODEL FOR THE SPECULAR COLOR COMPONENT CALCULATION Open
The most common bidirectional reflectance distribution functions (BRDF), among which the Schlick function is included, were analyzed. Compared to Blinn and Phong's BRDF, this function has a smaller degree, which makes it possible to use it…
View article: Combining Advanced Photoelectron Spectroscopy Approaches to Analyse Deeply Buried Gap(As)/Si(100) Interfaces: Interfacial Chemical States and Complete Band Energy Diagrams
Combining Advanced Photoelectron Spectroscopy Approaches to Analyse Deeply Buried Gap(As)/Si(100) Interfaces: Interfacial Chemical States and Complete Band Energy Diagrams Open
View article: Laser-Induced Modification of Hydrogenated Detonation Nanodiamonds in Ethanol
Laser-Induced Modification of Hydrogenated Detonation Nanodiamonds in Ethanol Open
Apart from the frequently used high-temperature annealing of detonation nanodiamonds (DNDs) in an inert environment, laser irradiation of DNDs in a liquid can be effectively used for onion-like carbon (OLC) formation. Here, we used fully d…
View article: Size Effects on Surface Chemistry and Raman Spectra of Sub-5 nm Oxidized High-Pressure High-Temperature and Detonation Nanodiamonds
Size Effects on Surface Chemistry and Raman Spectra of Sub-5 nm Oxidized High-Pressure High-Temperature and Detonation Nanodiamonds Open
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View article: Ni-mediated reactions in nanocrystalline diamond on Si substrates: the role of the oxide barrier
Ni-mediated reactions in nanocrystalline diamond on Si substrates: the role of the oxide barrier Open
Nanocrystalline diamond films grown on Si/native oxide substrates were subjected to Ni-mediated graphitization. Transmission electron microscopy study revealed crystals of NiSi2 and SiC across the carbon/silicon interface in add…
View article: Modification of the Surface Properties of Al<sub><i>x</i></sub>Ga<sub>1–<i>x</i></sub>N Substrates with Gradient Aluminum Composition Using Wet Chemical Treatments
Modification of the Surface Properties of Al<sub><i>x</i></sub>Ga<sub>1–<i>x</i></sub>N Substrates with Gradient Aluminum Composition Using Wet Chemical Treatments Open
The surface properties of biomolecular gradients are widely known to be important for controlling cell dynamics, but there is a lack of platforms for studying them in vitro using inorganic materials. The changes in various surface properti…
View article: Covalent Diamond–Graphite Bonding: Mechanism of Catalytic Transformation
Covalent Diamond–Graphite Bonding: Mechanism of Catalytic Transformation Open
Aberration-corrected transmission electron microscopy of the atomic structure of diamond-graphite interface after Ni-induced catalytic transformation reveals graphitic planes bound covalently to the diamond in the upright orientation. The …
View article: Nanostructured GaOOH modified with reactive yellow, red and blue water-soluble dyes
Nanostructured GaOOH modified with reactive yellow, red and blue water-soluble dyes Open
Water soluble reactive dyes are used to modify nanostructured GaOOH. The resulting particles showed excellent stability in water solutions. The materials were characterized by Scanning electron microscopy (SEM) and X-ray Photoelectron Spec…
View article: Study of Ni-Catalyzed Graphitization Process of Diamond by <i>in Situ</i> X-ray Photoelectron Spectroscopy
Study of Ni-Catalyzed Graphitization Process of Diamond by <i>in Situ</i> X-ray Photoelectron Spectroscopy Open
Graphene on diamond has been attracting considerable attention due to the unique and highly beneficial features of this heterostructure for a range of electronic applications. Here, ultrahigh-vacuum X-ray photoelectron spectroscopy is used…
View article: <i>Ab initio</i>density functional theory study on the atomic and electronic structure of GaP/Si(001) heterointerfaces
<i>Ab initio</i>density functional theory study on the atomic and electronic structure of GaP/Si(001) heterointerfaces Open
The atomic and electronic band structures of GaP/Si(001) heterointerfaces were investigated by ab initio density functional theory calculations. Relative total energies of abrupt interfaces and mixed interfaces with Si substitutional sites…
View article: Comment on pyramidal structure formation at the interface between III/V semiconductors and silicon
Comment on pyramidal structure formation at the interface between III/V semiconductors and silicon Open
GaP/Si(100) is considered as pseudomporphic virtual substrate for III/V-on-Si integration in order to reduce defects related to polar-on-nonpolar heteroepitaxy. The atomic structure of the GaP/Si(100) heterointerface is decisive to yield l…
View article: Erratum: “Electron band bending of polar, semipolar and non-polar GaN surfaces” [J. Appl. Phys. <b>119</b>, 105303 (2016)]
Erratum: “Electron band bending of polar, semipolar and non-polar GaN surfaces” [J. Appl. Phys. <b>119</b>, 105303 (2016)] Open
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