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    60Co ?-irradiation effects on electrical properties of a rectifying diode based on a novel macrocyclic Zn octaamide complex
    (Elsevier, 2010) Ocak, Y. S.; Kilicoglu, T.; Topal, G.; Baskan, M. H.
    C36H28N12O8ZnC12 center dot 9/2H(2)O, Zn-octaamide (ZnOA) macrocyclic compound was synthesized to be used in the fabrication of electronic and photoelectronic devices. The structure of new compound was identified by using H-1 NMR, C-13 NMR, IR, UV-vis and LC-MS spectroscopic methods. The Sn/ZnOA/n-Si/Au structure was engineered by forming a thin macrocyclic organic compound layer on n-Si inorganic substrate and then by evaporating Sn metal on the organic layer. It was seen that the device had a good rectifying behaviour and showed Schottky diode properties. The diode was irradiated under Co-60 gamma-source at room temperature. Characteristic parameters of the diode were determined from its currentvoltage (I-V) and capacitance voltage (C-V) measurements before and after irradiation. It was observed that gamma-irradiation had clear effects on I-V and C-V properties. Also, it was seen that the barrier height, the ideality factor and the series resistance values decreased after the applied radiation, while the saturation current value increased. (C) 2009 Elsevier B.V. All rights reserved.
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    Öğe
    Electron paramagnetic resonance of ?-irradiated glycyl-L-glutamine monohydrate, iminodiacetic acid and methyliminodiacetic acid
    (Taylor & Francis Ltd, 2008) Aydin, M.; Osmanoglu, Y. E.; Baskan, M. H.
    The electron paramagnetic resonances of gamma-irradiated powders of glycyl- L- glutamine monohydrate, iminodiacetic acid and methyliminodiacetic acid were investigated at room temperature. The observed species in glycyl- L- glutamine monohydrate powders were attributed to the CH2<(C)over dot>NHCOOH radical; and those in iminodiacetic acid and methyliminodiacetic acid powders to the HN<(C)over dot>HCH2(COOH)(2) and H3CN<(C)over dot>HCH2(COOH)(2) radicals respectively. The spectra were computer simulated and the g values of the radicals and the hyperfine structure constants of the unpaired electron with nearby protons and N-14 nucleus were determined. The results were found to be in good agreement with the existing literature data.