Tunhoo, Benchapol

Preferred name

Tunhoo, Benchapol

Alternative Name

Tunhoo, B.

Main Affiliation

Integrated Innovative Technology

benchapol.tu@kmitl.ac.th

Now showing 1 - 10 of 29

Some of the metrics are blocked by your
consent settings
Properties of CuPc/Se organics-inorganic hybrid thin films growth by electron beam evaporation technique
(2007-12-01)
Tunhoo, Benchapol
;
Thiwawong, Thutiyaporn
;
Nukeaw, Jiti
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 your
consent settings
Supercapacitive properties of cobalt oxide thin films prepared by electrostatic spray deposition technique at different substrate temperature
(2016-01-01)
Chansaengsri, Kasidid
;
Onlaor, Korakot
;
Thiwawong, Thutiyaporn
;
Tunhoo, Benchapol
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 your
consent settings
A humidity sensor based on iron oxide films prepared by spin coating process
(2017-01-01)
Songkeaw, Potiyan
;
Onlaor, Korakot
;
Tunhoo, Benchapol
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 your
consent settings
Optical properties and structure of copper (II) phthalocyanine(CuPc) organic thin film grown by electron - Beam evaporation technique
(2007-08-28)
Tunhoo, Benchapol
;
Nukeaw, Jiti
Copper (II) Phthalocyanine (CuPc) thin films were grown by electron beam evaporation technique with various substrate temperatures. Crystalline of CuPc thin films was investigated by x-ray diffraction (XRD) spectroscopy. Diffraction pattern exhibit high quality crystalline films as monoclinic α-phase structure. Surface morphology of CuPc thin films was characterized by field emission electron microscope (FE-SEM) and the films grown with 150 °C substrate temperature illustrated nanorod-like structure. Absorption spectra were obtained by UV/Visible spectroscopy, revealed to Q-band and B-band. The transition energy of CuPc was characterized by photoreflectance spectroscopy (PR) correspond to an absorption peak of Q-band. © 2007 IEEE.
Some of the metrics are blocked by your
consent settings
Structural and optical properties of CuPc/ZnSe multilayer hybrid thin films prepared by electron beam evaporator
(2007-12-01)
Thiwawong, Thutiyaporn
;
Tunhoo, Benchapol
;
Nukeaw, Jiti
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 your
consent settings
Influence of post-annealing temperature on the morphological, structural and optical properties of spin coated zinc oxide thin films
(2017-01-01)
Chaithanatkun, Natpasit
;
Fujihara, Takeshi
;
Kamano, Masaru
;
Konishi, Tomoya
;
Uehara, Nobutomo
In this study, zinc oxide films were fabricated on quartz glass substrate using spin coating technique with 2 molar of zinc oxide in organic solvent as starting materials. The fabricated sample was post-annealed at different temperature from 350 °C to 750 °C for 60 minutes. The energy dispersive x-ray spectroscopy (EDS) confirmed that zinc oxide coating film was fabricated on the quartz glass substrate. The crystallography of zinc oxide films were analyzed by X-ray diffraction (XRD). The crystallite size of zinc oxide nanoparticles was determined from the full-width at half maximum (FWHM) of XRD peaks using Debye-Scherrer's equation and showed that the zinc oxide films had highly crystalline quality in hexagonal wurtzite crystal structure. The morphological property of films was observed by scanning electron microscopy (SEM). Surface morphology of films shows regularly spread all of zinc oxide films. The optical property of various zinc oxide films was measured using UV-Visible spectrophotometer.
Some of the metrics are blocked by your
consent settings
Preparation of copper doped zinc oxide nanoparticles by precipitation process for humidity sensing device
(2018-09-05)
Thiwawong, Thutiyaporn
;
Onlaor, Korakot
;
Chaithanatkun, Natpasit
;
Tunhoo, Benchapol
In this work, nanoparticles of copper-doped zinc oxide were synthesized using the precipitation process at different copper doping molars. The structure of the synthesized nanoparticles was examined by X-ray diffraction and X-ray photoelectron spectroscopy. From the results, it was indicated that the nanoparticles were composed of mixed copper oxide-zinc oxide. To fabricate the humidity sensor, the nanoparticles were dispersed in ethanol and deposited on an electrode using the electrostatic spray deposition technique. The humidity sensing behavior was assessed at various humidity levels in a closed vessel of saturated salt solution. Moreover, the response times for the device were recorded. The Cole-Cole plot of the real and imaginary parts of impedance could be useful for description of the equivalent circuit that indicates the mechanism for humidity sensing behavior.
Some of the metrics are blocked by your
consent settings
The effect of substrate temperature on structure and optical properties of copper (II) phthalocyanine (CuPc) thin films prepared by organic evaporation
(2007-08-28)
Kamoldilok, Surachart
;
Tunhoo, Benchapol
;
Sumriddetchkajorn, Sarun
;
Nukeaw, Jiti
The influence of substrate temperature controls on Copper (II) phthalocyanine (CuPc) organic thin films onto glass substrate by organic evaporation system has been examined by X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and UV-VIS spectrophotometer. The two control methods are an on-off switching temperature control and a phase temperature control. The various substrate temperatures were controlled at 27, 80, 100, 120 and 150 °C, respectively. The thickness of all thin films is 30 nm. The XRD results from both methods show strongly peaks in orientation of [200] plane as α-phase monoclinic structure. By an on-off switching controlled temperature, the intensity of XRD peaks is increased with increasing substrate temperature. While intensity of XRD results from a phase controlled temperature shows increasing from 27 to 100 °C but decreasing from 120 to 150 °C. The CuPc grown at 150 °C exhibits nanorod-like structure obtained from an on-off switching temperature control and fiber-like structures obtained from a phase temperature controls. The optical absorptions of CuPc thin films of both methods determined from UV-VIS spectrophotometer show two strong peaks at 330 nm and 620 nm, denoted the B-band and Q-band, respectively. © 2007 IEEE.
Some of the metrics are blocked by your
consent settings
Effect of Annealing Temperature on Properties of Tin Oxide Films Prepared by Electrostatic Deposition Technique
(2018-01-01)
Onlaor, Korakot
;
Tunhoo, Benchapol
;
Thiwawong, Thutiyaporn
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 your
consent settings
Humidity sensor based on graphene oxide film prepared by simple drop-casting process
(2017-01-01)
Songkeaw, Potiyan
;
Onlaor, Korakot
;
Tunhoo, Benchapol
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.

Tunhoo, Benchapol

Filters

Settings

Sort By

Results per page