Kastamonu University DSpace Açıkerişim Platformu :: Browsing by Author "Yildirim, G"

Web of Science

A comprehensive study on mechanical properties of Bi1.8Pb0.4Sr2MnxCa2.2Cu3.0Oy superconductors

(2013.01.01) Dogruer, M; Karaboga, F; Yildirim, G; Terzioglu, C; Ozturk, O

Web of Science

A Study on Magnetoresistivity, Activation Energy, Irreversibility and Upper Critical Field of Slightly Mn Added Bi-2223 Superconductor Ceramics

(2012.01.01) Dogruer, M; Zalaoglu, Y; Varilci, A; Terzioglu, C; Yildirim, G; Ozturk, O

Web of Science

Analysis of Indentation Size Effect on Mechanical Properties of Cu-Diffused Bulk MgB2 Superconductor Using Experimental and Different Theoretical Models

(2013.01.01) Dogruer, M; Yildirim, G; Ozturk, O; Terzioglu, C

Web of Science

Assessment of superconducting and structural stability of advanced Y-123 and Y-358 ceramics with Tb/Y substitution in main matrices

(2024.01.01) Güdücü, G; Öztürk,Ö; Kurnaz, S; Tokeser, EA; Safran, S; Yildirim, G

Web of Science

Breaking point of the harmony between Gd diffused Bi-2223 slabs with diffusion annealing temperature

(2013.01.01) Aydin, H; Babanli, A; Altintas, SP; Asikuzun, E; Soylu, N; Ozturk, O; Dogruer, M; Terzioglu, C; Yildirim, G

Web of Science

Change of formation velocity of Bi-2212 superconducting phase with annealing ambient

(2013.01.01) Ozturk, O; Yildirim, G; Asikuzun, E; Coskunyurek, M; Yilmazlar, M; Kilic, A

Web of Science

Comparative study on mechanical properties of undoped and Ce-doped Bi-2212 superconductors

(2013.01.01) Zalaoglu, Y; Bekiroglu, E; Dogruer, M; Yildirim, G; Ozturk, O; Terzioglu, C

Web of Science

Effect of Ce Addition on the Magnetoresistivity, Irreversibility Field, Upper Critical Field and Activation Energies of Bi-2212 Superconducting Ceramics

(2012.01.01) Yildirim, G; Dogruer, M; Ozturk, O; Varilci, A; Terzioglu, C; Zalaoglu, Y

Web of Science

Effect of Co/Cu partial replacement on fundamental features of Y-123 ceramics

(2020.01.01) Ozturk, O; Nefrow, ARA; Bulut, F; Ada, H; Turkoz, MB; Yildirim, G

Web of Science

Effect of foreign impurity and growth temperatures on hexagonal structure and fundamental properties of ZnO nanorods

(2024.01.01) Seydioglu, T; Kurnaz, S; Tokeser, EA; Yildirim, G; Ozturk, O

Pubmed

Effect of foreign impurity and growth temperatures on hexagonal structure and fundamental properties of ZnO nanorods.

(2024-06-27) Seydioglu, T; Kurnaz, S; Tokeşer, E Aşıkuzun; Yildirim, G; Ozturk, O

This study examined the influence of growth temperature and dopant concentration on the properties of Gd- and Ni-doped zinc oxide nanorods (ZnO NRs). ZnO seed layers were deposited on glass substrates using a sol-gel and dip-coating approach. Gd- and Ni-doped ZnO NRs were hydrothermally grown on the seed layers at different temperatures such as 75, 90, and 105°C for a constant growth time of 5 h. The crystal structure, optical, surface morphology views, and electrical properties of the NRs were extensively investigated by x-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible spectroscopy, and four probe experimental methods. The XRD analysis confirmed the successful substitution of Zn ions by Gd and Ni within the ZnO main matrices. The reordering of hexagonal structures with varied electronegativity, ionic radius dimensions, and valence electron states of Gd and Ni dopants affected seriously the fundamental characteristic features of NRs. The SEM images showed that the ZnO NRs grown at 90°C possessed a more favorable surface morphology and well-defined hexagonal shape compared with those grown at other growth temperatures. Higher dopant concentration led to an increase in NR diameter but a decrease in density depending on the increase in the space between the NRs. Additionally, the optical transmittance was found to generally enhance with increasing dopant concentration. The results obtained highlighted the interplay between growth temperature, dopant type and concentration in tailoring the structural, morphological, and optical properties of Gd- and Ni-doped ZnO NRs, paving the way for the development of optimized nanomaterials for various applications. RESEARCH HIGHLIGHTS: The XRD analysis confirmed the successful substitution of Zn ions by Gd and Ni within the ZnO main matrices. The SEM images showed that the ZnO NRs grown at 90°C possessed a more favorable surface morphology and well-defined hexagonal shape compared with those grown at other growth temperatures. The optical transmittance was found to generally enhance with increasing dopant concentration. The results obtained highlighted the interplay between growth temperature, dopant type and concentration in tailoring the structural, morphological, and optical properties of Gd- and Ni-doped ZnO NRs, paving the way for the development of optimized nanomaterials for various applications.