A5102804479- GaN-based semiconductor devices and materials
- Ga2O3 and related materials
- ZnO doping and properties
- Metal and Thin Film Mechanics
- Semiconductor materials and devices
- Surface Roughness and Optical Measurements
- Groundwater flow and contamination studies
- 3D Printing in Biomedical Research
- Graphene and Nanomaterials Applications
- Mining and Industrial Processes
- Bone Tissue Engineering Materials
- Advanced Measurement and Metrology Techniques
- Infection Control and Ventilation
- Nanofabrication and Lithography Techniques
- Mechanical and Thermal Properties Analysis
- Dam Engineering and Safety
- Sensor Technology and Measurement Systems
- Additive Manufacturing and 3D Printing Technologies
- Renewable energy and sustainable power systems
- Waste Management and Environmental Impact
- Chemical Looping and Thermochemical Processes
- Advanced Surface Polishing Techniques
- Laser-Ablation Synthesis of Nanoparticles
- Thermal and Kinetic Analysis
- Nanowire Synthesis and Applications
Adam Mickiewicz University in Poznań
2020-2023
Kings Health Partners
2022
Wrocław University of Science and Technology
2014-2019
AGH University of Krakow
2016-2019
Institute of Human Genetics
2018
Polish Academy of Sciences
2018
Saint Petersburg State Electrotechnical University
2015
Southern Illinois University Carbondale
2005
Myocardial infarction (MI) is one of the most frequent causes death in industrialized countries. Stem cells therapy seems to be very promising for regenerative medicine. Skeletal myoblasts transplantation into postinfarction scar has been shown effective failing heart but shows limitations such, e.g. cell retention and survival. We synthesized investigated superparamagnetic iron oxide nanoparticles (SPIONs) as an agent direct labeling, which can used stem imaging. High quality, monodisperse...
Abstract Articular cartilage and meniscus injuries are prevalent disorders with insufficient regeneration responses offered by available treatment methods. In this regard, 3D bioprinting has emerged as one of the most promising new technologies, offering novel options. Additionally, latest achievements from fields biomaterials tissue engineering research identified constituents facilitating creation biocompatible scaffolds. study, we looked closer at hyaluronic acid multi-walled carbon...
Nowadays, nanostructures having tremendous chemical and physical properties are gaining attention in the biomedical industry. However, when they prepared through classical methods (physical chemical), often non-biocompatible toxic. Considering mentioned factors, this research, organometallic silver (OMAgNs) have been by green chemistry method using acetone, methanol, methanol-hexane-based extracts of medicinally important plant Cichorium intybus. Secondary metabolites from C. intybus can be...
We investigated whether the use of an atrial fibrillation (AF) risk prediction algorithm could improve AF detection compared with opportunistic screening in primary care and assessed associated budget impact.Eligible patients were registered a general practice UK, aged 65 years or older 2018/19, had complete data for weight, height, body mass index, systolic diastolic blood pressure recorded within 1 year. Three scenarios assessed: (i) diagnosis (standard care); (ii) standard replaced by...
This paper presents the results of investigations on accuracy contact point identification during coordinate measurement, which is crucial in context Industry 4.0 concept. In particular, effects swivel length and probe declination angle measurement were analyzed. experiments, deviations from expected coordinates (0,0,0) analyzed for different rotational angles probing head. It was found that recommended vertical positioning stylus at an A = 0° might have introduced some insignificant errors....
In this work we present the influence of in situ deposited non-continous SiN layer and chemical precursors III/V mole ratio change during GaN buffer growth for AlGaN/GaN/Si(111) heterostructures with low temperature AlN interlayer on their crystalline quality electrical mobility two dimensional electron gas (2DEG). We show, that application resulted a decrease (0002) full width at half maximum diffraction peak below 400 arcsec build-in stress 2 µm thick 200 MPa without any relaxation visible...
GaN layers without and with an in-situ SiN mask were grown by using metal organic vapor phase epitaxy for three different approaches used in on silicon(111) growth, the physical optical properties of studied. For each approach applied, 1.4 μm total thickness grown, silan SiH4 as Si source order to grow SixNx masking layer. The micrographs, scanning electron microscope images, atomic force images samples revealed cracks mask, micropits, which characteristic mask. In situ reflectance signal...
Carbon nanotubes (CNTs) are one of the most promising nanomaterials synthesized to date. Thanks their unique mechanical, electronic, and optical properties, they have found a wide application in electronics production biosensors nanocomposites. The functionalization multiwalled carbon (MWCNTs) is aimed at making them biocompatible by adding hydrophilic groups on surface, increasing solubility thus rendering applicable regenerative medicine. So far, there conflicting information about...
Abstract The applicability of scanning capacitance microscopy (SCM) technique for chosen electrical properties characterization AIIIBV structures fabricated by Metalorganic Vapor Phase Epitaxy (MOVPE) was examined. calibration curves quantitative doping levels in GaAs layers were created. AlGaN/GaN/Si heterostructures high electron mobility transistor fabrication and InGaAs tunnel junction tandem solar cell presented. crucial factors measurement conditions which could influence the obtained...
The paper presents the results of investigations on direction-dependent accuracy point identification during contact probe measurements with a coordinate measuring machine (CMM). Considering identified by an orthogonal to surface movement, transformation coordinates was made in order calculate displacement measured point. As result, positioning estimated three axes. experiments demonstrated strong dependence declination angle. Moreover, it found that directional texture which provided...
In this work we report the growth of AlGaN/GaN heterostructures on silicon substrates using quasi AlGaN barrier layer formed by 6×(AlN/GaN) superlattice (SL) stack with nominal Al content 35%. This is first attempt implementation in heterostructure, originally proposed Kawakami, Si(111) metalorganic vapor phase epitaxy (MOVPE) technique. The electrical properties high-electron mobility transistors (HEMT) type SL structures and conventional Al0.28Ga0.72N/GaN grown sapphire were investigated...
AlGaN/GaN heterostructures were deposited on Si utilizing in‐situ SiN masking layer as a mean to decrease stress present in the final heterostructures. Structures grown under different V/III ratio using metalorganic vapour phase epitaxy (MOVPE). Additional approach was applied obtain crack‐free which deposition of 15 nm low temperature AlN interlayer. Each heterostructure contained GaN 2.4 μm total thickness. In‐situ obtained via introduction SiH4 precursor into reactor high growth...
Abstract In this paper, selected problems occurring during GaN epitaxy on Si substrates are correlated with in-situ interferometer observations based structures fabricated using 3×2” Thomas Swan Close Coupled Showerhead MOVPE system. Samples were epitaxially grown highly resistive (> 500cm) p-type 2” silicon substrates. The growth was observed an acquiring reflectance traces in-situ. To avoid issues that shown in different approaches of the so-called buffer layer used by depositing them...
Herein, silicon substrates in alternative orientations from the commonly used Si(111) were to enable growth of polar and semipolar GaN-based structures by metalorganic vapor phase epitaxy method. Specifically, Si(112) Si(115) for epitaxial nitride multilayer structures, while same layer schemes also deposited on comparison purposes. Multiple approaches studied examine influence seed layers process conditions upon final properties GaN/Si(11x) templates. Scanning electron microscope images...
The new comprehensive model of the process for matching epitaxial layers to substrates, in dependence theirs crystallographic orientation, was developed allow a theoretical prediction strain and stress thin AlGaN with different composition grown on GaN template. elements continuous anisotropic materials strength theory applied develop model. It observed that AlGaN/GaN heterostructures greater than upper limit acceptable tensile even small Al content also could greatly vary, value direction,...
The Coronavirus (COVID-19) Disease Pandemic, caused by the Severe Acute Respiratory Syndrome 2 (SARS-CoV-2), has affected millions of people worldwide, prompting a collective effort from global scientific community to develop vaccine against it. This study purports investigate influence factors such as sex, age, type vaccination (Comirnaty, BNT162b2, Pfizer Inc. or Vaxzevria, ChAdOx1-S, Oxford/AstraZeneca), and time since administration on process antibody production. Both them are based...