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- MakaleYalnız künye2022Scopus SJRQ1Morpho-structural and optoelectronic properties of diamond like carbon–germanium (DLC-Ge) composite thin films produced by magnetron sputtering
Aslan, Naim; Kurt, Mustafa Şükrü; Mehmet Koç, Mümin
Diamond-like carbon films have found various areas of application due to their particularly durable characteristics. To enhance the electrical and optoelectronic characteristics of the material, diamond-like carbon was co-deposited with Ge on p-type Si wafer using the DC magnetron sputtering technique, from which diamond-like carbon-germanium nanocomposites were obtained. The structural properties of the nanocomposites were assessed using electron microscopy techniques. The chemical structure of the nanocomposite films was confirmed using energy dispersive spectroscopy and Raman spectroscopy. The electrical properties of the nanocomposite films were investigated via various electrical parameters as determined through current-voltage, capacitance–voltage, and conductance–voltage graphs. Photoresponsive and photosensitivity properties were also assessed using a solar simulator at various illumination intensities. It was concluded that nanocomposite thin films were responsive to light, where photosensitivity and photoresponsivity increased with increasing illumination intensity. The electrical characteristics of the nanocomposite films were associated with the frequency of the AC voltage applied.
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İncele - MakaleYalnız künye2022Scopus SJRQ2Structural, biocompatibility, and antibacterial properties of Ge–DLC nanocomposite for biomedical applications
Arslan, Mehmet Enes; Kurt, Mustafa Şükrü; Aslan, Naim; Kadi, Abdurrahim; Öner, Sena; Çobanoğlu, Şeymanur; Yazici, Ayşenur
Integrative production of new nanocomposites has been used to enhance favorable features of biomaterials for unlocking ultimate potential of different molecules. In the present study, advantageous properties of diamond like carbons (DLC) and germanium (Ge) like greater biocompatibility and antibacterial attributes were aimed to combined into a thin film. For this purpose, 400 nm DLC–Ge nanocomposite was coated on the borosilicate glasses via the magnetron sputtering and surface characteristics was analyzed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and The Raman spectrum. Biocompatibility analysis were performed by 3-(4,5-Dimethylthiazol-2-yl) (MTT) cell viability assay and Hoechst 33258 fluorescent staining genotoxicity assessments on the human fibroblast cell line (HDFa). Finally, antibacterial properties of DLC–Ge nanocomposite coatings were investigated by Pseudomonas aeruginosa (ATCC 27853) and Staphylococcus aureus (ATCC 25923) bacterial attachment analysis. As a result of magnetron sputtering coating, nearly 400 nm thick DLC–Ge nanocomposite film showed a smooth, a non-porous, and a dense characteristic. Cell viability analysis showed that Ge–DLC coatings permits %95 cell surface growth of fibroblast cells. Also, there were no significant difference in aspect of nuclear abnormalities compared to the (−) control which showed nonmutagenic features of the thin film. Finally, antibacterial attachment analysis put forth that Ge–DLC coatings inhibits bacterial adhesion as %40 and %25 rates for P. aeruginosa and S. aureus bacterial strains, respectively. From these results, DLC–Ge nanocomposites could be proposed as a potential new biomaterial for various biomedical applications.
AtıfScopus20WoS16OpenAlex19
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