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  1. Defect–Luminescence Correlation in Lu2SiO5: Yb3+/Er3+ Nanophosphors

    Article • Ceramics International, January 2026, Elsevier

    Professor Ugur Yahsi

  2. Swift heavy ion-induced damage in nanostructured ZrN film elaborated by magnetron sputtering technique

    Article • Radiation Effects and Defects in Solids, November 2025, Taylor & Francis

    Professor Ugur Yahsi

  3. The impact of reactor neutrons on 6H-SiC followed by irradiation of 91.3 MeV Xe ions–defects studies using positron annihilation spectroscopy

    Article • Physica Scripta, August 2025, Institute of Physics Publishing

    Professor Ugur Yahsi

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

    Article • Radiation Physics and Chemistry, April 2025, Elsevier

    Professor Ugur Yahsi

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

    Article • Journal of Molecular Structure, January 2025, Elsevier

    Professor Ugur Yahsi

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

    Article • Radiation Physics and Chemistry, January 2025, Elsevier

    Professor Ugur Yahsi

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

    Article • Materials Research Bulletin, December 2024, Elsevier

    Professor Ugur Yahsi

  8. Cation Vacancy‐Mediated Ultrafast Hole Transport in CuBi2O4 Photocathodes

    Article • ChemSusChem, November 2024, Wiley

    Professor Ugur Yahsi

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

    Article • Journal of Alloys and Compounds, November 2024, Elsevier

    Professor Ugur Yahsi

  10. Proton pathways via free volumes: A positron annihilation lifetime spectroscopy (PALS) investigation of proton conductivity in SPEEK-PEG-TMOS composites

    Article • Colloids and Surfaces A Physicochemical and Engineering Aspects, April 2024, Elsevier

    Professor Ugur Yahsi

  11. Dielectric relaxation time of PVAc in terms of hole fraction calculated from the theory of Simha-Somcynsky

    Article • Polymer, March 2024, Elsevier

    Professor Ugur Yahsi

  12. Free-Volume Analysis of PAMAM Dendrimers by means of Positron Annihilation Lifetime Spectroscopy

    Article • Journal of Molecular Structure, January 2024, Elsevier

    Professor Ugur Yahsi

  13. Detailed investigation on the insulation and permeability characteristics of rigid polyurethane foam loaded with micron-sized Turkey feather powder depending on the free volume change

    Article • Cellular Polymers, September 2023, SAGE Publications

    Professor Ugur Yahsi

  14. Investigation of Nd3+:Y2Si2O7 Phosphors Using Photoluminescence and Positron Annihilation Lifetime Spectroscopy

    Article • ECS Journal of Solid State Science and Technology, August 2023, The Electrochemical Society

    Professor Ugur Yahsi

  15. Decoding Polymer Architecture Effect on Ion Clustering, Chain Dynamics, and Ionic Conductivity in Polymer Electrolytes

    Article • ACS Applied Energy Materials, March 2023, American Chemical Society (ACS)

    Professor Ugur Yahsi

  16. The role of defects in the structural and photocatalytic properties of Mg/B co-doped ZnO nanoparticles

    Article • Journal of Materials Science Materials in Electronics, March 2023, Springer Science + Business Media

    Professor Ugur Yahsi

  17. Effects of sintering and zirconmullite doping on nanostructural vacancies of bovine hydroxyapatite by positron techniques

    Article • Journal of the American Ceramic Society, January 2023, Wiley

    Professor Ugur Yahsi

  18. Investigation of the relation between free volume and physico-mechanical performance in rigid polyurethane foam containing turkey feather fibers: Part 2

    Article • Journal of Cellular Plastics, November 2022, SAGE Publications

    Professor Ugur Yahsi

  19. Free volume vacancy behaviour and dynamic viscosity of diesel fuels with additives at elevated temperature and pressure: thermo-occupancy function

    Article • International Journal of Oil Gas and Coal Technology, January 2022, Inderscience Publishers

    Professor Ugur Yahsi

  20. Electronic ionisation-induced annealing of pre-existing defects in Al2O3 and CaF2 single crystals

    Article • The Philosophical Magazine A Journal of Theoretical Experimental and Applied Physics, October 2021, Taylor & Francis

    Professor Ugur Yahsi

  21. Effect of Free Volume on Curcumin Release from Various Polymer-Based Composite Films Analyzed Using Positron Annihilation Lifetime Spectroscopy

    Article • Materials, September 2021, MDPI AG

    Professor Ugur Yahsi, Dr. Swarup Roy

  22. Role of free volume in mechanical behaviors of side chain lcp grafted products of high density polyethylene

    Article • Journal of Polymer Research, July 2021, Springer Science + Business Media

    Professor Ugur Yahsi

  23. Heavy ion irradiation induced defects in Zircaloy-4

    Article • Physica Scripta, February 2021, Institute of Physics Publishing

    Professor Ugur Yahsi, Dr Ali SARI

  24. Optical and photoluminescence spectroscopy analysis and Doppler broadening annihilation radiation studies of perovskites based on La1-XNiXMnO2.75 thin layers

    Article • Optik, December 2020, Elsevier

    Professor Ugur Yahsi

  25. Free volume, thermal and morphological properties of photo-crosslinked thiol-Ene/ nanodiamond hybrid network

    Article • Pigment & Resin Technology, August 2020, Emerald

    Professor Ugur Yahsi

  26. A detailed survey for determination of the grafted semifluorinated acrylic compound effect on thermal, microstructural, free volume, mechanical and morphological features of HDPE

    Article • Journal of Fluorine Chemistry, May 2020, Elsevier

    Professor Ugur Yahsi

  27. Structural and dielectrical properties of PMMA/TiO2 composites in terms of free volume defects probed by positron annihilation lifetime spectroscopy

    Article • Polymers and Polymer Composites, February 2020, SAGE Publications

    Kadir Esmer, Professor Ugur Yahsi

  28. Interrelationships of Pressure-Dependent Hole Fraction and Elongational Viscosity in Polymer Melts

    Article • Advances in Polymer Technology, May 2019, Hindawi Publishing Corporation

    Dr Fatma Sahin-Dinc, Professor Ugur Yahsi

  29. Interpretation of ionic conductivity mechanism of some polymer with Li salt in terms of free volume

    Article • Radiation Effects and Defects in Solids, December 2018, Taylor & Francis

    Professor Ugur Yahsi

  30. Effects of boron nitrite in thermoplastic polyurethane on thermal, electrical and free volume properties

    Article • Polymer Bulletin, November 2018, Springer Science + Business Media

    Professor Ugur Yahsi

  31. Dielectric properties and conductivity of PVdF-co-HFP/LiClO4 polymer electrolytes

    Article • Canadian Journal of Physics, July 2018, Canadian Science Publishing

    Professor Ugur Yahsi

  32. Europium doping-induced stability and quantum confinement effect in ZnO quantum well wires QWW: Electronic structure calculation and material structural investigation in terms of band-gap shift

    Article • Materials Letters, February 2016, Elsevier

    Professor Ugur Yahsi

  33. The Effect of Hole Fraction on Viscosity in Atactic and Syndiotactic Polystyrenes

    Article • International Journal of Thermophysics, November 2015, Springer Science + Business Media

    Professor Ugur Yahsi

  34. Molecular structure stability of short-chain chlorinated paraffins (SCCPs): Evidence from lattice compatibility and Simha–Somcynsky theories

    Article • Journal of Molecular Structure, October 2015, Elsevier

    Professor Ugur Yahsi

  35. Relaxation time of polypropylene glycol and polypropylene glycol dimethylether-like polymers in terms of fluid-phase temperature and pressure dependent hole fraction

    Article • European Polymer Journal, July 2015, Elsevier

    Professor Ugur Yahsi

  36. Thermal and size effect on the R lines luminescence in YAG:Cr3+

    Article • Journal of Luminescence, February 2015, Elsevier

    Professor Ugur Yahsi

  37. Analysis of positron lifetime spectra using Bayesian inference

    Article • January 2015, the Institution of Engineering and Technology (the IET)

    Professor Ugur Yahsi

  38. On the non-newtonian viscous behavior of polymer melts in terms of temperature and pressure-dependent hole fraction

    Article • Journal of Applied Polymer Science, February 2014, Wiley

    Dr Fatma Sahin-Dinc, Professor Ugur Yahsi

  39. Viscous behavior of PS, PP, and ABS in terms of temperature and pressure-dependent hole fraction

    Article • Journal of Applied Polymer Science, January 2010, Wiley

    Professor Ugur Yahsi

  40. The magnetic field dependency of hydrogenic impurity binding energy under inverse lateral parabolic potential

    Article • Physica B Condensed Matter, November 2008, Elsevier

    Professor Ugur Yahsi

  41. On the ionic conductivity of polymer electrolytes in terms of hole fraction

    Article • Journal of Polymer Science Part B Polymer Physics, September 2008, Wiley

    Professor Ugur Yahsi

  42. Linking the Viscous and Vacancy Behavior of Mixtures of High-Molecular-Weight Hydrocarbons

    Article • International Journal of Thermophysics, August 2006, Springer Science + Business Media

    Professor Ugur Yahsi

  43. Linking the viscous and vacancy behavior of high molecular weight hydrocarbons

    Article • Rheologica Acta, March 2004, Springer Science + Business Media

    Professor Ugur Yahsi

  44. Article • International Journal of Thermophysics, January 2002, Springer Science + Business Media

    Professor Ugur Yahsi

  45. Viscous behavior of linear and three-branch alkanes: Linking the equilibrium and transport theories

    Article • Journal of Polymer Science Part B Polymer Physics, May 1999, Wiley

    Professor Ugur Yahsi

  46. Equation of state of poly(dimethylsiloxane) melts

    Article • Journal of Polymer Science Part B Polymer Physics, April 1998, Wiley

    Professor Ugur Yahsi

  47. Interrelationships betweenP-V-T and flow behavior of linear and nonlinear hydrocarbons

    Article • Polymer Engineering & Science, March 1998, Wiley

    Professor Ugur Yahsi

  48. Statistical thermodynamics of hydrocarbon fluids: scaling parameters and their group contributions

    Article • Journal of the Chemical Society Faraday Transactions, January 1995, Royal Society of Chemistry

    Professor Ugur Yahsi

  49. Molecular weight-dependence of free volume in polystyrene studied by positron annihilation measurements

    Article • Journal of Polymer Science Part B Polymer Physics, December 1994, Wiley

    Professor Ugur Yahsi