Találati lista | Tudóstér

001-es BibID:	BIBFORM123458
035-os BibID:	(Scopus)85202058418 (WoS)001296526400001
Első szerző:	Gulyás Szilvia (fizikus)
Cím:	Structural and phase transformations in Fe-Pd-Ag layered thin films by grain boundary diffusion / Szilvia Gulyás, Gábor L. Katona
Dátum:	2024
ISSN:	0031-8949
Megjegyzések:	The influence of the stacking order and of an additional Ag layer on the formation of ordered phases in thin (<50 nm) layered Fe/Pd and Fe/Ag/Pd films was investigated at 460 C. The samples were prepared by magnetron sputtering at room temperature on Si/SiO2 substrate and were post-annealed in vacuum. Composition depth profiling and X-ray diffraction were used to characterize the processes. It has been shown, that the stacking order strongly influences the formation of ordered phases both in Fe/Pd bilayered and Fe/Ag/Pd trilayered films. In bilayered Fe/Pd films for both stacking orders the FePd3 phase appeared and it also showed L12 ordering for one stacking order. Addition of Ag layer between the Fe and Pd layers found to promote the formation of FePd phase which showed L10 ordering or A1 disordered structure depending on stacking order. Based on the analysis of the chemical depth profiles and XRD patterns the transformations were interpreted by grain-boundary diffusion mechanisms including grain-boundary diffusion induced grain-boundary migration and solid state reaction.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk layered thin film FePd FePdAg multilayer L10 ordered phase depth profiling
Megjelenés:	Physica Scripta. - 99 : 9 (2024), p. 1-12. -
További szerzők:	Katona Gábor (1977-) (fizikus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM122960
035-os BibID:	(Scopus)85199536712 (WoS)001275376900001
Első szerző:	Javed, Faisal
Cím:	Investigation of conjunctivitis adenovirus spread in human eyes by using bifurcation tool and numerical treatment approach / Faisal Javed, Aqeel Ahmad, Ali Hasan Ali, Evren Hincal, Ayesha Amjad
Dátum:	2024
ISSN:	0031-8949
Megjegyzések:	In order to investigate the dynamics of the system, a mathematical model must be created to comprehend the dynamics of various prevalent diseases worldwide. The purpose of this investigation is to explore the early identification and treatment of conjunctivitis adenovirus by introducing vaccination methods for asymptomatic individuals. A mathematical model is constructed with the aim of strengthening the immune system. The ABC operator is then utilized to convert the model into a fractionally ordered one. The developed system is analyzed with analytical solutions by employing Sumudu transforms, including convergence analysis. The boundedness and uniqueness of the model are investigated using Banach space, which are key properties of such epidemic models. The uniqueness of the system is confirmed to ensure it has a unique solution. The stability of the newly constructed SEVIR system is investigated both qualitatively and statistically, and the system`s flip bifurcation has been verified. The developed system is examined through a Lyapunov function-based local and global stability study. The solution to the system is found using the Atangana-Toufik technique, a sophisticated method for reliable bounded solutions, employing variousfractional values. Error analysis has also been conducted for the scheme. Simulations have been carried out to observe the real behavior and effects of the conjunctivitis virus, confirming that individuals with a strong immune response can recover without medication during the acute stage of infection. This helps to understand the real situation regarding the control of conjunctivitis adenovirus after early detection and treatment by introducing vaccination measures due to the strong immune response of the patients. Such investigations are useful for understanding the spread of the disease and for developing control strategies based on the justified outcomes.
Tárgyszavak:	Természettudományok Matematika- és számítástudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk mathematical modeling boundedness non-local kernel uniqueness flip bifurcation adenovirus
Megjelenés:	Physica Scripta. - 99 : 8 (2024), p.1-19. -
További szerzők:	Ahmad, Aqeel Ali, Ali Hasan (1989-) (matematikus) Hincal, Evren Amjad, Ayesha
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM112435
035-os BibID:	(WoS)000898946400001 (Scopus)85145006989
Első szerző:	Shenouda, S. S. (fizikus)
Cím:	Optimization of the structural and optical properties of ALD grown ZnO thin films for photocatalytic applications: thickness dependence / S S Shenouda, M Saif, E Baradács, B Parditka, T Fodor, Z Erdélyi
Dátum:	2023
ISSN:	0031-8949
Megjegyzések:	Thin films of ZnO with different thicknesses (ranging from 8 to 40 nm) have been prepared by plasma-enhanced atomic layer deposition. Grazing incidence x-ray diffraction shows the nano-crystalline structure of the films with high degree of disorder. The films have also lattice oxygen and non-lattice oxygen where the film with 20 nm thickness has the highest percentage of the non-lattice oxygen. These films have indirect optical transitions. The energy gap increases slightly with decreasing the film thickness (2.96, 3.03 and 3.16 eV for the thicknesses 40, 20 and 8 nm, respectively). These films have strong photocatalytic activity to treat the water from the organic dyes such as Levafix Brilliant Red. The film with thickness 20 nm has the optimum photocatalytic activity and the lowest contact angle with water. The photoinduced super-hydrophilic nature of ZnO film (20 nm) renders this film suitable for antifogging application. The high photocatalytic activity and super-hydrophilicity are due to the low recombination rate of charge carriers accompanied to the excess of oxygen vacancies and the high degree of structural disorder.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk ZnO thin films optical properties Urbach energy photocatalysis
Megjelenés:	Physica Scripta. - 98 : 1 (2023), p. 1-12. -
További szerzők:	Saif, M. Mostafa Baradács Eszter (1974-) (fizikus) Parditka Bence (1985-) (fizikus) Fodor Tamás Erdélyi Zoltán (1974-) (fizikus)
Pályázati támogatás:	TKP2021-NKTA-34 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: