Yazar "Namli, H." seçeneğine göre listele

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    Öğe
    p-phthalimidobenzoic thin film for volatile organic vapor detection
    (Natl Inst Optoelectronics, 2010) Sen, S.; Capan, R.; Ozel, M. E.; Hassan, A. K.; Namli, H.; Turhan, O.
    Thin films of the molecule of p-phthalimidobenzoic acid (FIBA) have been deposited by spin coating and are studied for application as sensing membrane for the detection of alcohols. Atomic force microscopy (AFM) and surface plasmon resosnance (SPR) were used for the characterisation of the FIBA films. Alcohol sensing properties of the obtained films were examined using SPR measurements. AFM images show that FIBA films have the large surface roughness with an estimated roughness RMS value of 6.3 nm. Films with such compact and granular morphology are believed to provide improved sensitivity when used in sensor applications. The measured SPR curves were analysed by applying a least square fitting procedure using Fresnel's reflection theory. FIBA film used as a sensing element for the detection of saturated 2-propanol, ethanol and methanol vapors. Fast response and recovery for all studied analytes have been obtained. These results show that thin films made with this FIBA molecule are demonstrating good suitability for room temperature vapor application.
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    Öğe
    Phthalimide thin film for methanol vapor detection
    (Amer Scientific Publishers, 2008) Sen, S.; Capan, R.; Ozel, M. E.; Hassan, A. K.; Turhan, O.; Namli, H.
    The thin film and sensing properties of a novel (N-phthalimido)-p-aminobenzoic acid (FIABA) compound against methanol vapor is investigated using Atomic Force Microscopy (AFM) and Surface Plasmon Resonance (SPR). AFM results indicated that FIABA molecule is a suitable material to produce thin films by spin coating method, with compact and granular morphology. SPR results showed that thin films of this material are highly selective for methanol vapor with fast response and recovery times. Vapor exposure tests using SPR measurements clearly show that the novel FIABA molecules demonstrate a promising material in the development of room temperature vapor sensing application.
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    Öğe
    Thin film characterization of novel phthalimide materials
    (Natl Inst Optoelectronics, 2011) Sen, S.; Capan, R.; Ozel, M. E.; Hassan, A. K.; Turhan, O.; Namli, H.
    Spin coating technique is employed to produce thin phthalimide films using novel p-phthalimidobenzoic acid (FIBA) and N-(phthalimido)-p-aminobenzoic acid (FIABA) materials. Several spin speeds and various solution concentrations are chosen to monitor the thin film deposition process of these new materials. The optical properties are studied using UV-visible spectroscopy and spectroscopic ellipsometry methods. The absorption of the FIBA and FIABA films against the spin speed showed an exponential behavior. pi -> pi* transition is occurred. The thicknesses of thin films at 2000 rpm are obtained 15.86 nm for FIBA and 12.99 nm for FIABA using spectroscopic ellipsometry results.