Thiwawong, Thutiyaporn
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Thiwawong, Thutiyaporn
Alternative Name
Thiwawong, T.
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Email
thutiyaporn.th@kmitl.ac.th
19 results
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Item type:Publication, Properties of CuPc/Se organics-inorganic hybrid thin films growth by electron beam evaporation technique(2007-12-01); ; Organic and Inorganic materials with copper (II) phthalocyanine (CuPc) and selenium (Se) were deposited to implement hybrid thin Alms by multi pocket electron beam evaporation technique. Crystallization of hybrid films was performed by x-ray diffraction (XRD) spectroscopy. XRD pattern exhibits monoclinic α-phase crystallizations structure of CuPc. Influences of the CuPc thickness on the crystalline structure of selenium films were obtained. As the thickness of CuPc layer was increased to 100 nm, the hexagonal Se was observed. Optical absorption spectra were measured by UV-Visible spectrophotometer. Results of hybrid absorption spectra were revealed to absorption spectra of CuPc and Se. Surface roughness of films can confirm with XRD spectra .The surface morphology was characterized by atomic force microscope (AFM) with non-contact mode, it illustrate the point that hybrid thin films is nanocrystal structure. © 2007 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, AFM force distance curve measurement for surface investigation of polymers compound blend with metal nanoparticles(2017-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Supercapacitive properties of cobalt oxide thin films prepared by electrostatic spray deposition technique at different substrate temperature(2016-01-01); ; In this work, cobalt oxide thin films were prepared by electrostatic spray deposition (ESD) technique. The influence of the substrate temperatures on properties of film was investigated. Phase transformation of cobalt oxide thin films due to the effect of different substrate temperature was also observed. Cyclic voltammetry was used to measure the performance of cobalt oxide supercapacitor. At higher substrate temperature, the cobalt oxide thin films exhibit the high specific capacitance due to the effect of phase transformation in cobalt oxide films. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Structural and optical properties of CuPc/ZnSe multilayer hybrid thin films prepared by electron beam evaporator(2007-12-01); ; Multilayer hybrid thin films consisting of alternating layers of organic and inorganic materials were fabricated with powder of copper-phthalocyanine (CuPc) and zinc selenide (ZnSe) by electron beam evaporator. The structural and optical characterization of multilayer hybrid thin film were carried out by using X-ray diffraction (XRD), atomic force microscope (AFM) and UV-Vis absorption spectroscopy. XRD patterns show two peaks of the orientation of (200) plane monoclinic structure in CuPc material and (111) plane cubic structure in ZnSe material where pair numbers of multilayer hybrid thin film higher than two pairs. With the variation in the number of pairs of CuPc/ZnSe, AFM images present almost similar morphology but the optical absorption spectra are significantly changed. Such spectral changes can be interpreted by the effect of the aggregate size and the characteristic of the multilayer hybrid structure. © 2007 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Preparation of copper doped zinc oxide nanoparticles by precipitation process for humidity sensing device(2018-09-05); ; - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of Annealing Temperature on Properties of Tin Oxide Films Prepared by Electrostatic Deposition Technique(2018-01-01); ; In this work, tin oxide films were prepared by electrostatic spray deposition technique. The effect of post annealing temperature on properties of prepare film was performed. The structural, surface morphology and optical properties of tin oxide films were characterized by X-ray diffraction, field-emission scanning electron microscope, and UV-Visible spectrophotometer. The crystalline size is found to increase with increase the annealing temperature. Moreover, the effect of annealing temperature on physical properties of tin oxide films has been performed. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Study of PDMS compounds using the adhesion force determined by AFM force distance curve measurements(2010-02-05); The atomic force microscope(AFM) was used to perform surface force measurements in contact mode to investigate surface properties of model systems at the nanoscale. Three different Polydimethylsiloxane (PDMS) compounds were observed. The first consisted of pure PDMS, the second of PDMS blend with the nanoparticles Zinc Oxide(PDMS/ZnO) and the third of PDMS blend with the nanoparticles Zinc Oxide and toluene solvent(PDMS/ZnO/toluene), respectively. Surface morphology and the adhesion force were investigated by using atomic force microscopy. Force - distance curve measurement was performed in a contact mode, which used tip as silicon nitride. Moreover, we found a significantly different of the adhesion force when modified by nanoparticles ZnO and toluene solvent. © (2010) Trans Tech Publications. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Organic/inorganic multilayer hybrid thin films: Effect of substrate temperature(2009-09-01); New organic/inorganic multilayer hybrid thin films were prepared by electron beam evaporator between two and 10 pairs of CuPc/ZnSe alternating layers. The structural and optical characterisations of multilayer hybrid thin films were carried out using X-ray diffraction, field emission scanning electron microscopy (FE-SEM) and UV-vis absorption spectroscopy. X-ray diffraction patterns show (200) plane as monoclinic CuPc, and (111) and (220) planes as cubic ZnSe structures on the deposited films at room temperature. At the substrate temperature of 150°C, CuPc crystallisation becomes dominant and ZnSe crystallisation is subtle. Nanorod-like CuPc morphology is obtained with increasing substrate temperature. These nanorod-like crystals are arranged mainly with the stacking axis of the CuPc molecules parallel to the substrate surface and nanocrystalline of ZnSe are formed on nanorod indicated through FE-SEM images. The optical absorption spectra are broad, ranging between 420 and 900 nm at room temperature and slightly shift to longer wavelength (520-800 nm) at substrate temperature of 150°C, owing to the nanorod-like structure. The substrate temperature has a direct effect on the structural and optical properties of multilayer hybrid thin films. © W. S. Maney & Son Ltd. 2009. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of ascorbic acid on structural properties of ZnO nanoparticles prepared by precipitation process(2015-07-01); In this work, zinc oxide nanoparticles (ZnO NPs) was prepared by chemical precipitation process. To study the influence of the ascorbic acid on properties of ZnO nanoparticles, the ascorbic acid was added to precursor solution at different molar ratio of ascorbic acid (AA) and zinc during the synthesis process. The characterizations of ZnO nanoparticles were performed using X-ray diffraction (XRD), Raman spectroscope, and field emission scanning electron microscopy (FE-SEM). The effect of ascorbic acid on the structural properties of ZnO NPs was investigated. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Charge transfer mechanism in organic memory device(2010-02-05); ; ; In this paper, the conduction mechanism in organic bistable memory device was investigated by both experimental and theoretical method. The current voltage (J-V) characteristics showed the electrical bistable properties between an initial low-conductivity state and a highconductivity state upon application of an external electric field at room temperature. The current transition exhibited a very narrow voltage range that causes an abrupt increase of current. The onstate and the off-state were proposed by space-charge-limited current and thermionic emission model, respectively. That supported by the experimental data to explained the charge transfer mechanism in organic memory device. © (2010) Trans Tech Publications.