Onlaor, Korakot
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Preferred name
Onlaor, Korakot
Alternative Name
Onlaor, K.
Main Affiliation
Email
korakot.on@kmitl.ac.th
33 results
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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, A humidity sensor based on iron oxide films prepared by spin coating process(2017-01-01); In present work, iron oxide films were prepared by spin coating technique. The effect of annealing temperature on the properties of films was investigated. The structural and surface morphology properties of films have been performed by X-ray diffraction, Fourier transform infrared spectroscopy, and field-emission scanning electron microscope. To fabricate the humidity sensor device, the iron oxide film was spun on indium tin oxide transparent electrode. The sensor exhibited the humidity response in the range of 23-93% RH. The mechanisms and equivalent circuit models of sensor can be explained by complex impedance measurement. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Influence of post-annealing temperature on the morphological, structural and optical properties of spin coated zinc oxide thin films(2017-01-01) - 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, Effect of anodizing voltage on anodic titanium dioxide (ATO) growth based on an ethylene glycol solution containing NH4F(2016-01-01) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Humidity sensor based on graphene oxide film prepared by simple drop-casting process(2017-01-01); In this work, the film of graphene oxide was deposited by drop-casting process for humidity sensor device. The structural property of graphene oxide film was performed by Raman spectroscopy. The humidity device was fabricated onto the indium tin oxide, as the transparent electrode. The device exhibited the adsorption and desorption behaviors of humidity in a range of 23-93 %RH. The complex impedance measurement was used to explain the mechanisms of the humidity device. The equivalent circuit model of the device was demonstrated.