Thiwawong, Thutiyaporn
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Preferred name
Thiwawong, Thutiyaporn
Alternative Name
Thiwawong, T.
Main Affiliation
Email
thutiyaporn.th@kmitl.ac.th
28 results
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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, Multilevel conductance switching and carrier transport mechanisms of memory devices based on an ITO/PVK:Ag nanoparticles/Al structure(2018-01-25); ; Multilevel conductance switching was achieved using silver nanoparticles (Ag NPs) embedded in poly(9-vinylcarbazole) (PVK) with a structure of ITO/PVK:Ag NPs/Al. The current-voltage (I-V) curves of the memory devices at low reading voltages showed three distinguished states of current. The memory devices exhibited non-volatile rewritable memory characteristics. The carrier transport mechanisms of the devices in each state were analyzed by theoretical models based on the experimental I-V data. In addition, retention time measurements showed clearly three current states with good data retention properties. From the retention times test, the average values of ON/OFF, ON/intermediate (INTERM) and INTERM/OFF current ratios of the memory devices were 1.7 × 10<sup>6</sup>, 3.5 × 10<sup>2</sup> and 5.0 × 10<sup>3</sup>, respectively. - 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, 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, Transparent write-once-read-many-times memory devices based on an ITO/EVA:rGO/ITO structure(2018-10-01); ; Fully transparent electronic devices play an important role in electronic applications. Well-known examples are the wearable devices and transparent displays; their applications are transparent memory devices of interest. The transparent write-once-read-many-times (WORM) memory devices based on synthesized graphene oxide (GO) blended in poly (ethylene-co-vinyl acetate) (EVA) had been fabricated by a thermal roll lamination technique in which the synthesized GO inside the EVA matrix was reduced into reduced graphene oxide (rGO) during the lamination process. The memory devices exhibited an optical transmittance of more than 60% in the visible light region. The conduction mechanisms of the memory devices were identified using theoretical models based on the current–voltage (I–V) curves. The fitted I–V results were described by the conductive filaments in which electrons were transported through the rGO direct contacts. In addition, the maximum ON/OFF current ratio of the transparent WORM memory device was approximately 5 × 10<sup>5</sup>, and the retention time tests showed two current states with good data retention properties under different temperatures. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A humidity sensor based on silver nanoparticles thin film prepared by electrostatic spray deposition process(2013-07-22); ; In this work, thin film of silver nanoparticles for humidity sensor application was deposited by electrostatic spray deposition technique. The influence of the deposition times on properties of films was studied. The crystal structures of sample films, their surface morphology, and optical properties have been investigated by X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), and UV-VIS spectrophotometer, respectively. The crystalline structure of silver nanoparticles thin film was found in the orientation of (100) and (200) planes of cubic structure at diffraction angles 2θ = 38.2° and 44.3°, respectively. Moreover, the silver nanoparticles thin films humidity sensor was fabricated onto the interdigitated electrodes. The sensor exhibited the humidity adsorption and desorption properties. The sensing mechanisms of the device were also elucidated by complex impedance analysis. © 2013 Thutiyaporn Thiwawong et al. - 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, Electrical Bistable Properties of P-25 TiO2 Nanoparticles Composited with PVP for Memory Devices(2019-10-01); In this work, P-25 titanium dioxide nanoparticles (TiO<inf>2</inf> NPs) were composited with poly-vinylpyrrolidone (PVP) at various concentrations of TiO<inf>2</inf> NPs. The bistable memory devices were fabricated by spin coating from a prepared PVP:TiO<inf>2</inf> NPs solution on indium tin oxide (ITO) electrodes with the device structure of ITO/PVP:TiO<inf>2</inf> NPs/Al. The maximum ON/OFF current ratio of the bistable memory devices was approximately 10<sup>5</sup> at a reading voltage of +1 V. The mechanism of the memory device can be expressed by theoretical fitting between the experimental results and conduction models. Moreover, a retention time test for continuous read operations of the device is presented. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Electrical properties and switching mechanisms of flexible organic-inorganic bistable devices(2013-08-01); ; ; The electrical properties of flexible organic-inorganic bistable devices fabricated with aluminum (Al) sandwiched between tris-(8-hydroxyquinoline) aluminum (Alq<inf>3</inf>) and zinc selenide (ZnSe) layers were investigated. Current-voltage (I-V) measurements were conducted under conditions before, during, and after bending while changing the bending distance of the base plastic polyethylene terephthalate (PET) systematically. The maximum ON/OFF current ratios of the flexible bistable devices at flat and bent conditions were approximately 2.7×10<sup>4</sup> and 1.9×10<sup>4</sup>, respectively. The conduction mechanisms in both ON and OFF states were analyzed by a theoretical model. © 2012 Springer-Verlag Berlin Heidelberg. - 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.