A5062782110- Metal and Thin Film Mechanics
- Semiconductor materials and devices
- GaN-based semiconductor devices and materials
- Diamond and Carbon-based Materials Research
- Copper Interconnects and Reliability
- Hydrocarbon exploration and reservoir analysis
- NMR spectroscopy and applications
- Hydraulic Fracturing and Reservoir Analysis
- Advanced MRI Techniques and Applications
- Adhesion, Friction, and Surface Interactions
- Advanced NMR Techniques and Applications
- Seismic Imaging and Inversion Techniques
- Drilling and Well Engineering
- Advanced Neuroimaging Techniques and Applications
- Plasma Diagnostics and Applications
- High-pressure geophysics and materials
- Enhanced Oil Recovery Techniques
- MXene and MAX Phase Materials
- Semiconductor materials and interfaces
- Ion-surface interactions and analysis
- Metallic Glasses and Amorphous Alloys
- Material Dynamics and Properties
- Boron and Carbon Nanomaterials Research
- Glass properties and applications
Texas A&M University at Qatar
2007-2017
Texas A&M University
2017
Mitchell Institute
2017
University of Ioannina
2007-2012
Aristotle University of Thessaloniki
2005-2006
The combination of electrical conductivity, chemical and metallurgical stability, refractory character, having lattice constants that are close to those III-nitrides makes transition metal nitrides promising candidates for electronics device applications. We study the structure, plasma energy stoichiometric, similar crystal quality as well widest variety their ternaries ever reported. establish phase spaces (6.9–10.5 eV) work function (3.7–5.1 these complex with constant (0.416–0.469 nm) we...
We report on the electronic structure and optical properties of conducting ternary transition metal nitrides consisting metals different groups periodic table elements. For study bonding, structure, TixTa1−xN film growth, spectroscopy ab initio calculations were used. Despite valence electron configuration constituent elements, Ta(d3s2) Ti(d2s2), we show that TiN TaN are completely soluble due to hybridization d sp electrons N, respectively, stabilizes systems rocksalt structure. The have...
We present results on the stability and tailoring of cell size conducting δ-TixTa1−xN obtained by film growth ab initio calculations. Despite limited solubility Ta in Ti, we show that TiN TaN are soluble due to hybrization d sp electrons metal N, respectively, stabilizes ternary system rocksalt structure. The stress-free sizes follow Vegard’s rule; nevertheless, process-dependent stresses expand as-grown films. electronic properties films (ρ=180Ωcm) similar those TaN.
Tantalum nitride is an interesting solid with exceptional properties and it might be considered as a representative model system of the d3s2 transition metal nitrides. In this work highly textured, stoichiometric, rocksalt TaN(111) films have been grown on Si(100) by pulsed laser deposition. The were under triaxial stress, which has determined sin2 ψ method. stress-free lattice parameter was found to 0.433±0.001 nm, value also ab initio calculations within local spin density approximation....
We report on molecular dynamics (MD) simulations and physical vapor deposition experimental results concerning the development of glassy nanocrystalline Cu–Zr thin films. MD has revealed that when Cu Zr are deposited sequentially, a film overlayer is formed consists a-Zr t-Zr2Cu, while if simultaneously deposited, amorphous CuZr emerges, due to formation icosahedral-like clusters impede nucleation. Thin films grown by pulsed laser magnetron sputtering techniques were analyzed x-ray...
Abstract Appropriate drilling fluid additives which can build effective filter cakes are key components to minimize formation damage. Today there exists no and quantitative technique assess the damage minimization potential of any novel fluid. This study provides methodology for such a technique, by integrating HP/HT loss data, derived from standard API press, with cake quality filtrate penetration depth, Nuclear Magnetic Resonance (NMR) Imaging (MRI) techniques. Novel nano-based fluidwas...
Abstract The heterogeneity of carbonate reservoirs strongly influences their petrophysical properties and oil recovery procedures. Among many reservoir characterization techniques, NMR stands as a unique tool for exploration. basic advantage the method is that oil, gas, water possess different properties. Therefore, they can be distinguished quantitatively. In this work we have combined Laboratory methods pore-scale numerical simulations, with MRI techniques in order to elucidate...
Abstract Carbonate rocks are among the dominant oil reservoir formations. Due to their heterogeneity, petrophysical properties difficult be evaluated. Magnetic Resonance, applied as low-field Nuclear Resonance (NMR) or Imaging (MRI), powerful tools for characterization. Their basic advantage is quantitative demarcation of various fluids. In this work we have used MRI methods in order evaluate carbonate rocks. For purpose commercial limestone, saturated with deionized water, crude and model...
Wettability of a carbonate reservoir is one the key points concerning oil recovery. Most reservoirs tend to be oil-wet. An oil-wet wettability generates significant problems in recovery since formation has stronger ability keep attached its pores, and it also decreases efficiency water flooding leading faster breakthrough. alteration wet have demonstrated successful method enhancing through chemical such formations. Wettability, IFT (Interfacial tension), temperature, are all parameters that...