Yazar "Erdal, Mehmet Okan" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim
    Öğe
    CeO2 :BaMoO4 nanocomposite based 3D-printed electrodes for electrochemical detection of the dopamine
    (Elsevier Sci Ltd, 2024) Hussaini, Ali Akbar; Sarılmaz, Adem; Özel, Faruk; Erdal, Mehmet Okan; Yıldırım, Murat
    Despite being a relatively new technology, low-cost 3D printing has exhibited a significant impact on many facets of daily life. 3D printing has gained its popularity due to its ease of designing, quick prototyping, and waste reduction. In this study, we synthesized CeO2/BaMoO4 nanocomposite and characterize it with UV-vis, XRD, and SEM. Band gap of CeO2/BaMoO4 was found as 3.17 eV, showing an excellent semiconductor behavior. We also fabricated affordable 3D-printed working electrodes for application in dopamine hydrochloride detection. CeO2/BaMoO4 were modified onto 3D-printed electrodes and commercially purchased screen-printed electrodes to compare its applicability in dopamine detection. Electroactive surface areas were enhanced by addition of CeO2/BaMoO4. In linear range of 5-1000 mu M, limit of detection values were found as 4.52 mu M and 2.77 mu M for CeO2:BaMoO4/SPE and CeO2:BaMoO4/3DPE biosensors, respectively. Sensitivity was calculated as 8.7285 and 0.3142 A/M.cm(2) for CeO2:BaMoO4/SPE and CeO2:BaMoO4/3DPE, respectively. Both devices have shown significant reproducibility, repeatability and selectivity.
  • Küçük Resim
    Öğe
    Determination of the effects of ankaferd wound dressing on the wound healing process in rats
    (Galenos Publ House, 2024) Şensoy, Erhan; Güneş, Eda; Erdal, Mehmet Okan
    Objectives: The effects of a composite nanofiber wound dressing material consisting of a polyvinylidene alcohol and polyvinylidene pyrrolidone polymer mixture with a hemostatic agent doped with Ankaferd Blood Stopper (ABS) on the healing of experimentally induced dermal wounds in rats were examined. Materials and Methods: Rats were divided into 4 groups (n= 6). Histological material was examined on tissues taken from the wound site, whereas total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) analyses were performed on blood samples taken from the cardia. The material that was produced had hydrophilic properties, and both the ABS-doped and-undoped forms of the material positively affected wound healing. Results: In the histopathological examinations, macroscopic evaluations revealed a statistically significant difference between the groups in terms of wound diameter, reepithelialization, and inflammation formation ( p = 0.019). In parallel with wound healing and histological outcomes, TAS values increased in the ABS-doped groups, and TOS and OSI values decreased in the wound dressing groups ( p < 0.05). Conclusion: It was concluded that the ABS-dopped dressing did not have a negative effect on wound healing, it accelerated healing, and it could be used effectively and safely to treat skin injuries. However, further studies are needed to evaluate the clinical and histopathological benefits and potential adverse effects of wound dressings produced using ABS-doped polymers on wound healing.
  • [ X ]
    Öğe
    Photodiode behaviors of the AgSbS2 nanocrystals in a Schottky structure
    (IOP Publishing Ltd., 2021) Koçyigit, Adem; Erdal, Mehmet Okan; Özel, Faruk; Yıldırım, Murat
    Cubic phase AgSbS2 nanocrystals (NCs) were synthesized by the hot-injection method, and they were inserted between the Al and p-Si to fabricate Al/AgSbS2/p-Si photodiode by the thermal evaporation method. AgSbS2 NCs were characterized by XRD, SEM and TEM instruments to confirm the crystal phase, surface morphology as well as crystalline size. The XRD pattern revealed that the cubic crystalline structure of the AgSbS2. The spherical shapes and well surface morphology were affirmed by SEM and TEM analysis. Al/AgSbS2/p-Si photodiode was characterized by I-V measurements depending on the light power intensity and by C-V measurement for various frequencies. I-V characteristics revealed that the Al/AgSbS2/p-Si exhibited good photodiode behavior and a high rectifying ratio. Various diode and detector parameters were extracted from I-V measurements, and they were discussed in detail. The C-V characteristics highlighted that the Al/AgSbS2/p-Si photodiode showed voltage and frequency dependent profile at the accumulation region. The fabricated Al/AgSbS2/p-Si photodiode can be thought for optoelectronic applications.