Thickness Dependent Dielectric Loss of Plasma Poly (Ethylene Oxide) Films
Journal Title: Cumhuriyet Science journal - Year 2018, Vol 39, Issue 2
Abstract
Dielectric properties of plasma poly (ethylene oxide) (pPEO) thin film samples were investigated at room temperature. The thin film samples with different thicknesses were deposited by plasma assisted physical vapor deposition (PAPVD) technique at 5 W plasma discharge power. The thicknesses were 20, 100, 250, 500 nm. It was observed that dielectric constant increases with increasing thickness. The relaxation times determined by dielectric loss-frequency relation, shift toward higher frequencies with increasing thickness. In addition film thickness, heating processes were defined as another parameter. By this purpose, thin film samples were heated and cooled, respectively. It was observed that maxima and minima of dielectric loss at cooling process take place at lower frequencies in comparison with frequencies at which maxima and minima were detected at heating process. These results may show the effect of dead layer at thinner films. After heating process, it was observed from behavior of dielectric constant and dielectric loss that the crosslinking density increases by heating effect. This effect may cause additional reactions between free radicals which are production of PAPVD. Moreover, dynamic glass transition temperatures were calculated. These temperatures prove the effect of dead layer approximation.
Authors and Affiliations
Hulusi Kemal ULUTAŞ
Keywords
Related Articles
- EP ID EP488366
- DOI 10.17776/csj.399267
- Views 58
- Downloads 0
Predicting the Shear Strength of Fiber Reinforced Concrete Corbels Via Support Vector Machines
Precast corbels are commonly preferred structural members in industrial buildings. In this study, a novel application of support vector machines (SVM) is employed for the prediction of ultimate shear strength of fiber re...
Spacelike Ruled Surface In Hyperbolic 3-Space
In this paper in Hyperbolic space , we study a spacelike ruled surfaces. A spacelike ruled surface in is acquired by a spacelike geodesic moving along a spacelike curve. In this paper, we are investigated developable...
Structural and Optical Properties of Indium Selenide (InSe) Thin Films Deposited on Glass and GaSe Single Crystal Substrates by SILAR Method
Structural, morphological and optical properties of undoped and boron doped Indium Selenide (InSe) thin films grown on glass and layered Gallium Selenide (GaSe) single crystal substrates with SILAR method have been inves...
Synthesis of Anionic Hydrogels for Uranyl Ion Adsorption
In this study, the anionic hydrogels were prepared in existence of crosslinker (N, N’-methylenebisacrylamide) by free radical addition reaction in aqueous solutions of neutral acrylamide and 2-hydoxyethyl methacrylate mo...
An Integrated TOPSIS, GRA and VIKOR Based on Interval Type-2 Fuzzy Method to Improve Customer Satisfaction in Public Transportation
Recently, multi-criteria decision making problems with interval type-2 fuzzy methods have received increasing attention both from researchers and practitioners. In this study, an interval type-2 fuzzy TOPSIS and GRA base...