Ugur Yahsi | Experimental methods | Best Researcher Award

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Prof. Ugur Yahsi | Experimental methods | Best Researcher Award

Head of the General Physics Department | Marmara University | Turkey

Prof. Dr. Uğur Yahşi is a Full Professor in the Physics Department at Marmara University, Istanbul, Turkey. With an academic background spanning Physics at institutions such as Istanbul University (BSc), University of Wisconsin (MSc), and Case Western Reserve University (PhD), he has made notable contributions to the scientific community in both research and education.

👨‍🎓Profile

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Early Academic Pursuits 📚

Prof. Dr. Yahşi’s academic journey began with a BSc in Physics from Istanbul University in 1983. He pursued an MSc at the University of Wisconsin from 1987-1988, followed by a PhD at Case Western Reserve University, completing his studies in 1994. His early research laid the foundation for his future work in material science and applied physics.

Professional Endeavors 💼

Prof. Yahşi’s professional career has been extensive, with a continuous academic presence at Marmara University, where he has held positions from Assistant Professor to Full Professor since 1996. Additionally, he has served as a Visiting Scientist at the University of Missouri-Kansas City and contributed significantly to various administrative roles within the university, such as Senator and Director of the Institute of Pure and Applied Sciences.

Contributions and Research Focus 🔬

Prof. Dr. Yahşi’s research is at the forefront of material science, particularly in nanomaterials, macromolecular physics, and defect structures. His research spans across multiple topics, including vacancy structures, dendrimers, polymer-ion interactions, and nanometric defects in materials. He is a leading figure in applying positron annihilation spectroscopy and other advanced techniques to study the electronic properties of materials, advancing nanotechnology and material engineering.

Impact and Influence 🌍

Prof. Yahşi’s impact extends beyond his research, as he has shaped the academic environment at Marmara University. He has mentored numerous students through undergraduate, master’s, and doctoral research projects. His leadership roles have fostered growth in the Physics Department and research programs, contributing to collaborations with other institutions and research organizations globally.

Academic Cites 📑

Prof. Dr. Yahşi has been extensively cited in scientific journals for his work on positron annihilation and material defect structures. His influence can be seen in the academic advancements in polymer science, nanotechnology, and material characterization techniques. The funding from projects such as TÜBİTAK and Marmara University underscores the significance of his work in advancing scientific discovery.

Research Skills 🔧

Prof. Yahşi possesses a diverse set of research skills, including expertise in positron annihilation spectroscopy, experimental physics, and materials characterization. He is skilled in various computational tools such as Fortran, Mathematica, and MatLab, enabling him to model complex physical systems and conduct numerical simulations in support of his theoretical work.

Teaching Experience 🎓

Prof. Yahşi’s teaching spans over decades, with experience in courses ranging from Advanced Classical Mechanics to Computer Programming in Fortran. His commitment to student development is evident through his role in shaping curriculum and teaching courses in Technical English, Solid-State Physics, and Numerical Methods. He has also contributed significantly to the translation and localization of key texts in Physics, ensuring that students have access to high-quality educational resources.

Awards and Honors 🏆

Prof. Yahşi has been the recipient of numerous fellowships and awards, such as the Turkish Educational Ministry Fellowship for his graduate studies. His work has earned research grants from prominent Turkish organizations like TÜBİTAK, demonstrating his recognized contributions to scientific progress. He continues to receive support for innovative projects, including the BİDEB Mentorship Support Program and various Marmara University projects.

Legacy and Future Contributions 🌱

Prof. Dr. Uğur Yahşi’s legacy lies in his commitment to advancing physics education and research, particularly in material science and nanotechnology. His ongoing projects, such as the investigation of flash sintering in doped ZnO structures and polymer materials, are paving the way for future breakthroughs. With continued administrative roles and research leadership, Prof. Yahşi is poised to make lasting contributions to both academic knowledge and scientific innovation.

Publications Top Notes

Free volume impact on ionic conductivity of PVdF/GO/PVP solid polymer electrolytes via positron annihilation approach

  • Authors: M. Yilmazoğlu, H. Okkay, U. Abacı, C. Tav, U. Yahşi
    Journal: Radiation Physics and Chemistry, 2025

The Influence of Defects on the Structural, Optical, and Antibacterial Properties of Cr/Cu Co-Doped ZnO Nanoparticles

  • Authors: L. Arda, Z. Ra’ad, S. Veziroğlu, C. Tav, U. Yahşi
    Journal: Journal of Molecular Structure, 2025

Correlation of proton conductivity and free volume in sulfonated polyether ether ketone electrolytes: A positron annihilation lifetime spectroscopy study

  • Authors: M. Lahmuni, M. Yilmazoğlu, U. Abacı, C. Tav, U. Yahşi
    Journal: Radiation Physics and Chemistry, 2025

A novel approach for the atomic scale characterization of Li-ion battery components probed by positron annihilation lifetime spectroscopy

  • Authors: R. Bakar, S. Koç, A. Yumak Yahşi, C. Tav, U. Yahşi
    Journal: Materials Research Bulletin, 2024

Free-volume analysis of the structural and dielectric properties of PMMA/TeO2 composites via positron annihilation lifetime spectroscopy

  • Authors: S. Kuzeci, E. Özcan, A.U. Kaya, R. Bakar, C. Tav, U. Yahşi, K. Esmer
    Journal: Journal of Alloys and Compounds, 2024

 

Hosam M Gomaa | Material Science | Member

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Dr. Hosam M Gomaa | Material Science | Member

PHD at Faculty of Science, Al-Azhar University, Cairo, Egypt

Dr. Hosam M. Gomaa, based in Giza, Egypt, is an accomplished physicist specializing in Solid State Physics. With a background from Al-Azhar University, Cairo, he has lectured extensively in Libya and Egypt, covering diverse topics from General Physics to Optics. Currently affiliated with the Pharaohs Higher Institute, his research spans Materials, Optics, and Physics, focusing on areas like Oxide Glasses and Nanomaterials. Dr. Gomaa is known for his expertise in Thermal Analysis and Spectral Techniques. He has been an integral part of prestigious scientific teams, contributing significantly to Mossbauer Effect and Nanoscience research labs.

Professional Profiles:

Educational Qualifications

B. Sc. of Physics, Physics Department, Faculty of Science, Al-Azhar University, Cairo, Egypt, 1999/2000 M. Sc. of Solid State Physics, Department of Physics, Faculty of Science, Al-Azhar University, Cairo, Egypt, 2005 Ph. D. of Solid State Physics, Department of Physics, Faculty of Science, Al-Azhar University, Cairo, Egypt, 2008

Statement of Previous Experience:

Formal Lecturer (Assistant Professor) of Physics, Department of Physics, Faculty of Arts and Sciences, Sert University, Libya, 2009-2015 Lecturer (Assistant Professor) of Engineering Physics, Department of Physics, Faculty of Engineering Technology, Sert University, Libya, 2009-2015 Formal Tutor (Assistant Professor) of Basic Sciences (Physics, Electrical Engineering, Fundamentals of Electronics, Optics), Optical Branch, High Institute of Optical Technology, Cairo, Egypt, 2016-2020

Research Focus:

Dr. Hosam M. Gomaa’s research primarily focuses on the optical and structural properties of various glass systems, with a particular emphasis on bismuth borate glasses. His work encompasses the investigation of dopants like zinc, calcium, and niobium, and their effects on linear and nonlinear optical parameters. Additionally, he explores the structural modifications induced by the inclusion of different metal oxides, such as vanadium, copper, and titanium. Dr. Gomaa’s research contributes significantly to the understanding of glass materials for optoelectronic applications and radiation shielding. His studies offer valuable insights into the development of novel glass compositions with tailored optical and functional properties.

Publications

  1. Non-zero θ13 and δCP phase with A4 flavor symmetry and deviations to tri-bi-maximal mixing via Z2 × Z2 invariant perturbations in the neutrino sector, Publication: 2024.
  2. Effect of replacing B2O3 with Dy2O3 on the structural, physical, and radiation shielding properties of sodium boroaluminate glass, Publication: 2024.
  3. Investigating La2O3-enriched glass compositions: thermal, optical, structural properties and Gamma-Ray shielding efficiency, Publication: 2024.
  4. Photoimpedance spectroscopy of ZnTe/ZnMnTe heterojunction for photodetector devices using Cole–Cole diagrams and relaxation time process, Publication: 2023.
  5. Effect of BaO doping on the structural and optical properties of some cerium-copper sodium borate glasses, Publication: 2023.
  6. Estimate of the effect of adding CoCl 2 in different amounts on the structural, optical properties, and the radiation shielding ability of arsenic borate glasses containing Na+, Ca++, and Pb++ cations, Publication: 2023.
  7. New mathematical formulas for more accurate physical descriptions of the optical and optoelectric conductivities of an optical medium, Publication: 2023.
  8. Effect of Graphene Nanopowder on the Structural and Optical Characteristics of Lead Borovanadate Glass Containing Ca2+ and Na+ Cations, Publication: 2023.
  9. Structural properties, linear, and non-linear optical parameters of ternary Se80Te(20−x)Inx chalcogenide glass systemsAnálisis estructural y parámetros ópticos lineales y no lineales de sistemas ternarios de vidrio de calcogenuro de composición Se80Te(20-x)Inx, Publication: 2023.
  10. Toward a novel and accurate relationship between electrical and optical conductivity in opto-material sciences: New strategy, Publication: 2022.

 

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Issam Derkaoui | Materials Science | Member

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Dr. Issam Derkaoui | Materials Science | Member

PHD at FSDM, Fez, Morocco

Issam Derkaoui, a PhD holder in Materials Science and Industrial Processes, specializes in the experimental development of nanocomposites with graphene derivatives and metal oxides. His research, spanning from synthesis to characterization, aims to advance nanotechnologies. Additionally, he employs first-principles calculations like DFT to model metal oxides and perovskites. With extensive post-doctoral and teaching experience, Issam has honed skills in materials characterization and synthesis methods. He has contributed to numerous publications and presented at international conferences. As a reviewer and organizer, Issam actively engages in the academic community, fostering advancements in materials science and computational physics.

Professional Profiles:

EDUCATION

Temporary Post-Doctoral Researcher Solid State Physics Laboratory, FSDM, Fez, Morocco July 2018 – 2022 Experimental: Synthesis and characterization of nanomaterials and nanocomposites. Theoretical: Validation of experimental results using DFT calculations. Permanent Teacher of Physics Preparatory classes for engineering schools, Ibn Ghazi, Meknes, Morocco 2015 – 2019 Training in Materials Characterization Techniques National Institute of Materials Physics (NIMP), Bucharest, Romania X-ray diffractometer, Raman Spectroscopy, Spectroscopic Ellipsometry Training in Material Synthesis Methods National Institute of Materials Physics (NIMP), Bucharest, Romania Magnetron Sputtering Method, Hydrothermal Method, Pyrolysis Spray Technique Vacancy for the Training: Methodology of Writing a Final Project Laboratory of Theoretical and Applied Physics, FSDM, Fez, Morocco

RESEARCH INTERNSHIPS

Associate Professor: University of Dschang, Cameroon (2019 – Present) Lecturer and Visiting Lecturer: Various institutions in Cameroon (2012 – 2019) Visiting Lecturer: National Polytechnic Bambui, Cameroon (2008 – 2009) Visiting Lecturer: Intitut Privé Polyvalent la Reforme, Cameroon (2007 – 2008)

SOFTWARE SKILLS

CASTEP Materials Studio Movavi OriginLab PVSyst PVGIS PowerPoint Quantum Espresso Python

RESEARCH AREA EXPERIENCE

Issam Derkaoui’s research interests lie in both experimental and theoretical aspects of materials science, with a focus on: Hydrothermal Synthesis Chemical synthesis methods Metal oxides (VxOy, WOx, ZnO, etc.) Graphene (GO, rGO) Nanostructures Nanocomposites Structural properties Optoelectronic properties

Research Focus:

Based on the provided publications, Issam Derkaoui’s research primarily focuses on the structural, electronic, and optical properties of various materials, including ZnO nanowires, graphene nanohybrids, and metal oxides. His investigations span experimental and theoretical approaches, employing techniques such as first-principles calculations and experimental characterization methods. Derkaoui’s work contributes to advancing our understanding of nanocomposites, thin films, and semiconductor materials, with applications ranging from optoelectronic devices to photodetectors. Overall, his research interests lie at the intersection of materials science, nanotechnology, and computational physics, aiming to drive innovations in diverse technological domains.

Publications 

  1. Optimization of the luminescence and structural properties of Er-doped ZnO nanostructures: effect of dopant concentration and excitation wavelength, cited by: 21, Publication date: 2022.
  2. Improved first-principles electronic band structure for cubic (Pm3m) and tetragonal (P4mm, P4/mmm) phases of BaTiO3 using the Hubbard U correction, Publication date: 2023.
  3. Overview of the Structural, Electronic and Optical Properties of the Cubic and Tetragonal Phases of PbTiO3 by Applying Hubbard Potential Correction, Publication date: 2023.
  4. Thermionic Emission of Atomic Layer Deposited MoO3/Si UV Photodetectors, Publication date: 2023.
  5. Effect of strontium (Sr) doping on the structural, electronic and optical properties of ZnO, by first-principles calculations, Publication date: 2023.
  6. Reduced graphene oxide-functionalized zinc oxide nanorods as promising nanocomposites for white light emitting diodes and reliable UV photodetection devices, Publication date: 2023.
  7. Impact of thickness on optoelectronic properties of α-MoO3 film photodetectors: Integrating first-principles calculations with experimental analysis, Publication date: 2023.
  8. Self-Powered UV Photodetector Utilizing Plasmonic Hot Carriers in 2D α-MoO3/Ir/Si Schottky Heterojunction Devices, Publication date: 2023.
  9. Investigation of structural and optical properties of Mg doped ZnS thin films prepared by Mist-CVD technique: Experimental and theoretical aspects, Publication date: 2024.
  10. The interface structural, electronic and optical properties of ZnO nanowires/Graphene nanohybrid (ZnO NWs/G): Experimental and theoretical DFT investigations, Publication date: 2024.

 

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