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Article Citation - WoS: 6Citation - Scopus: 6Design and characterization of (Al, C)/p-Ge/p-BN/C isotype resonant electronic devices(Wiley-v C H verlag Gmbh, 2015) Al Garni, S. E.; Qasrawi, A. F.In this work, a Ge/BN isotype electronic device that works as a selective microwave bandstop filter is designed and characterized. The interface is designed using a 50-m thick p-type BN on a 0.2-m thick p-type germanium thin film. The modeling of current-voltage characteristics of the Al/Ge/BN/C channel of the device revealed that the current is dominated by thermionic emission and by the tunneling of charged particles through energy barriers. The evaluation of the conduction parameters reflected a resonant circuit with a peak-to-valley current ratio of (PVCR) of 63 at a peak (V-p) and valley (V-v) voltages of 1.84 and 2.30V, respectively. The ac signal analysis of the Al/Ge/BN/C channel that was carried out in the frequency range of 1.0-3.0GHz displayed a bandstop filter properties with notch frequency (f(n)) of 2.04GHz and quality factor (Q) of 102. The replacement of the Al electrode by C through the C/Ge/BN/C channel caused the disappearance of the PVCR and shifted f(n) and Q to 2.70GHz and 100, respectively. The features of the Ge/BN device are promising as they indicate the applicability of these sensors in communication technology.Article Citation - Scopus: 2Boron Nitride Coating of Tools and Dies To Improve Performance in Manufacturing Applications(Inderscience Publishers, 2014) Kaftanoʇlu,B.; Dökmetaş,N.A physical vapour deposition (PVD) system is developed to coat boron nitride (BN) films on tools, dies, and mechanical parts to improve hardness, to decrease wear, to reduce friction and to increase high temperature resistance. Various coatings applications on steel, stainless steel, aluminium, titanium and copper have shown good adhesion. Quality is checked by coating thickness, nanohardness, scratch testing, AFM, SEM and FTIR measurements. BN coating is also applied on specimens and tools which have been previously coated by titanium nitride (TiN). FTIR results show that different allotropes (polymorphs) of BN are produced by different coating parameters. From industrial tests, extended life and improved performance is obtained for tools and dies in manufacturing applications. © 2014 Inderscience Enterprises Ltd.Article Citation - WoS: 13Citation - Scopus: 13Surface Characterization and Corrosion Resistance of Boron Nitride Coated Titanium Dental Implants(Maik Nauka/interperiodica/springer, 2019) Cakal, G. O.; Gokmenoglu, C.; Kaftanoglu, B.; Ozmeric, N.Surface modifications of dental implants are of vital importance to enhance osseointegration and improve their corrosion resistance. This study characterized the surface properties of boron nitride (BN) coated titanium implants and their corrosion behaviors. Pretreated implant surfaces were coated successfully with BN by RF-magnetron sputtering system. Surface morphology and elemental composition of uncoated and BN-coated implant surfaces were examined by using X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM) coupled with energy dispersive X-ray spectrometer (EDS). The corrosion tests were performed by use of artificial saliva. The tri-dimensional topography of the uncoated sandblasted, large-grit, acid-etched (SLA) implant surface showing sponge-like characteristics, revealed characteristic differences at micro level after BN-coating. It had more holes and peaks in addition to the sponge-like characteristics which further improved its surface microroughness. Boron-to-nitrogen ratio of the coated surface was obtained in the range of 0.8-1.6. The BN-coated SLA implant had no weight loss in the corrosion test. However, the surface characteristics of implants before coating had an impact on corrosion behavior of other implant types. The results demonstrated that titanium implants can be coated with BN successfully and this coating improves the surface properties of dental implants.
