A5010164175- Nuclear Physics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear physics research studies
- Ion-surface interactions and analysis
- Electron and X-Ray Spectroscopy Techniques
- Metal and Thin Film Mechanics
- Nuclear reactor physics and engineering
- Advanced materials and composites
- Diamond and Carbon-based Materials Research
- Radiomics and Machine Learning in Medical Imaging
- Medical Imaging Techniques and Applications
- Radioactive element chemistry and processing
- Semiconductor materials and interfaces
- Radiation Therapy and Dosimetry
- Metal-Organic Frameworks: Synthesis and Applications
- Chalcogenide Semiconductor Thin Films
- Semiconductor materials and devices
- Integrated Circuits and Semiconductor Failure Analysis
- Mass Spectrometry Techniques and Applications
- Quantum Dots Synthesis And Properties
- Advanced Radiotherapy Techniques
- Nuclear Materials and Properties
- Artificial Intelligence in Healthcare and Education
- MXene and MAX Phase Materials
- Crystallography and Radiation Phenomena
Ubitech (Greece)
2023-2025
Uppsala University
2016-2021
National Taiwan University of Arts
2019
National Centre of Scientific Research "Demokritos"
2011-2019
National Technical University of Athens
2010-2015
Institute of Nuclear and Particle Physics
2011-2015
Crystalline (Hf,Ta,Ti,V,Zr)N nitride thin films, with a high-entropy metal-sublattice, were synthesized at 440 °C by reactive magnetron sputtering using an equimolar Hf-Ta-Ti-V-Zr-compound target. The coatings are single-phase fcc structured mono-nitrides for N2/(Ar + N2) flow-rate-ratios (fN2) between 30 and 45%. For higher fN2 small fraction of second phase (next to the matrix) can be detected X-ray diffraction (XRD) selected area electron (SAED). All studied (prepared 60%) show similar...
Electronic stopping of slow protons in ZnO, ${\mathrm{VO}}_{2}$ (metal and semiconductor phases), ${\mathrm{HfO}}_{2}$, ${\mathrm{Ta}}_{2}{\mathrm{O}}_{5}$ was investigated experimentally. As a comparison the resulting cross sections (SCS) to data for ${\mathrm{Al}}_{2}{\mathrm{O}}_{3}$ ${\mathrm{SiO}}_{2}$ reveals, electronic does not correlate with properties specific material such as band gap energies. Instead, oxygen $2p$ states are decisive, corroborated by density functional theory...
Tailoring mechanical properties of transition metal carbides by substituting carbon with nitrogen atoms is a highly interesting approach, as thereby the bonding state changes towards more metallic like character and thus ductility can be increased. Based on ab initio calculations we could prove experimentally, that up to content about 68% non-metallic sublattice, Ta-C-N crystals prevail face centered cubic structure for sputter deposited thin films. The partly stabilized well Ta vacancies -...
Rutherford backscattering spectrometry (RBS) has been used for the first time to study post-synthetic linker exchange (PSE) in metal-organic frameworks. RBS is a non-invasive method quantify amount of introduced linker, as well providing means depth profiling order identify preferred localization linker. The benzenedicarboxylate (bdc) by similarly sized 2-iodobenzenedicarboxylate (I-bdc) proceeds considerably slower than migration I-dbc through UiO-66 crystal. Consequently, I-bdc found...
Background/Objectives: Lutetium-177 is a widely used radioisotope in targeted radionuclide therapy, particularly for treating certain types of cancers relying on beta and low-energy gamma emissions, making it suitable both therapeutic post-therapy monitoring purposes. The purpose this study was to evaluate the technical parameters developing prototype portable camera dedicated 177Lu imaging applications. Methods: well-validated GATE Monte Carlo toolkit characteristics system its performance...
The specific energy loss of medium-energy hydrogen, helium, and neon ions in titanium nitride is studied. Electronic stopping cross sections the range 3--140 keV/amu were measured backscattering geometry using time-of-flight ion scattering, from experienced TiN thin films on Si. For lowest energies, data for H show a strong deviation Bragg's rule. hydrogen Ne ions, electronic exhibits velocity proportionality at velocities below 1 a.u. Comparison to density functional theory calculations...
Abstract Objective: A methodology is introduced for the development of an internal dosimetry prediction toolkit nuclear medical pediatric applications. The proposed study exploits Artificial Intelligence techniques using Monte Carlo simulations as ground truth accurate absorbed doses per organ prior to imaging acquisition considering only personalized anatomical characteristics any new patient. Approach: GATE were performed a population computational models calculate specific dose rates...
We present a thorough experimental study of electronic stopping H, He, B, N, Ne and Al ions in TiN with the aim to learn about energy loss mechanisms slow ions. The was measured by means time-of-flight medium-energy ion scattering. Thin films on silicon δ-layer W at TiN/Si interface were used as targets. compare our results non-linear density functional theory calculations, examining electron-hole pair excitations screened free electron gas static limit, equivalent expected value for TiN....
TiN thin films have previously been used as intermediate barrier layers on Mo back contacts in CZTS(e) solar cells to suppress excessive reaction of the annealing step. In this work, with various thickness (20, 50 and 200 nm) were prepared reactive DC magnetron sputtering Mo/SLG substrates annealed, without layers, either S or Se atmospheres. The as-deposited references annealed samples characterized X-ray Photoelectron Spectroscopy, Diffraction, Time-of-Flight-Elastic Recoil Detection...
In this study, interlayers with varied thickness of TiN between Cu 2 ZnSnS(e) 4 (CZTS(e)) absorbers and Mo on soda‐lime glass substrates are investigated for CZTS(e) thin film solar cells. Na diffusion is analyzed using Secondary Ion Mass Spectrometry it found that the use thick facilitates into absorbers. The CZTS(e)/TiN/Mo interfaces scrutinized Transmission Electron Microscopy (TEM) Energy Loss Spectroscopy (EELS). It chalcogens present in precursor occurs through openings, resulting from...