| 1. |
- Shakoury, Reza, et al.
(författare)
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Ion beam assisted electron gun deposition of MgF2 thin films Effects of Argon ion bombardment on the optical and morphological properties
- 2022
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Ingår i: Vakuum in Forschung und Praxis. - : WILEY-V C H VERLAG GMBH. - 0947-076X .- 1522-2454. ; 34:1, s. 36-40
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Tidskriftsartikel (refereegranskat)abstract
- A traditional method for increasing the density of the optical films, is heating the substrate. An alternative way to increase the density of the film, is bombardment of substrate by ions during film growth. This method is known as ion assisted deposition (IAD). In this paper, magnesium fluoride, MgF2, thin film has been produced on a glass substrate by ion assisted deposition method.The effects of ion energy have been studied on density and refractive index film. Reflection, transmission and scattering spectra of the samples were measured by a spectrophotometer. Moreover, Atomic force microscope (AFM) is prepared. Using these measurements, optical and physical properties of the films are analyzed. A sample of MgF2 film has been produced without ion bombardment so that one can compare the effect of ion bombardment.
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| 2. |
- Ghobadi, Nader, et al.
(författare)
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Optical transitions and photocatalytic activity of NiSe films prepared by the chemical solution deposition method
- 2022
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Ingår i: The European Physical Journal Plus. - : SPRINGER HEIDELBERG. - 2190-5444. ; 137:6
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Tidskriftsartikel (refereegranskat)abstract
- In this work, nanostructured NiSe thin films were prepared by the chemical solution deposition method at different pH fixing the deposition time. The surface morphology, structural and semiconductor properties of such films were investigated utilizing different methodologies. It was found that slight changes in pH can influence the optical bandgap and structure of NiSe films. The results of Tauc's plot and the derivation of the ineffective thickness method were compared to estimate the optical bandgap energy and the transition index. Additionally, the Urbach energy was also assessed. The potential of the NiSe nanostructured samples as photocatalysts was evaluated by analyzing the decomposition of azoic Congo red dye under visible light radiation.
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| 3. |
- Sadeghi, Mohammad, 1962-, et al.
(författare)
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Influence of ion implantation on corrosion resistance of the nickel over steel
- 2023
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Ingår i: Materials Science and Technology. - : TAYLOR & FRANCIS LTD. - 0267-0836 .- 1743-2847.
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Tidskriftsartikel (refereegranskat)abstract
- Nitrogen ions were implanted at different energies of 15, 30, 45 and 60 keV and with the flux of 10(17) N(+)cm(-2) inside the nickel layers that have been deposited on the 304 stainless steel using the electron gun method at room temperature. XRD patterns showed different crystalline phases of nickel nitride for the implanted samples. The surface morphology was extracted by MountainsMap software's using statistical data from AFM analysis. In addition, a potentiodynamic polarisation test was performed in a 3.5% NaCl solution to study the corrosion behaviour. These studies revealed that corrosion was directly related to the deposition parameters, mainly the implantation energy, modifying the surface so that the highest corrosion resistance was obtained for the sample implanted with 60 keV.
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