Chaisitsak, Sutichai
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Chaisitsak, Sutichai
Alternative Name
Chaisitsak, S.
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Email
sutichai.ch@kmitl.ac.th
5 results
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Item type:Publication, Organic vaporensors based on single-walled CNTs(2006-12-01); ; Tuantranont, AdisornAn investigation of the influence of organic vapor (ethanol, methanol and acetone) on the characteristics of simple-structure sensors fabricated from single-walled carbon nanotube (SWCNT) thin films is reported. SWCNTs were directly deposited, by using atmospheric pressure CVD using alcohol-ferrocene mist, on the patterned Al electrodes to fabricate a sensor. It was found that the characteristic of SWCNT-based sensors depended on the depositing position in CVD reactor. The sensor response could be optimized by adjusting the depositing position along the inner quartz reactor. The sensor reproducibility could be improved by light soaking after switching to air. © 2006 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Fabrication of amorphous silicon nanocones by bias-enhanced microwave plasma CVD(2007-02-25)We present a simple growth of highly aligned silicon nanocones by using bias-enhanced microwave plasma CVD of gas mixture of hydrogen and methane. SiO<inf>2</inf> and nickel films were used as a silicon precursor and a seeding material for patterning cone structure, respectively. SEM studies showed that the nanocones have nanometer-size tips and sub micrometer-size bases. TEM analysis revealed that the nanocones have amorphous structure with nickel on the tips. The model for formation of silicon nanostructures will also be suggested. © 2006 Elsevier B.V. All rights reserved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Parametric study of atmospheric-pressure single-walled carbon nanotubes growth by ferrocene-ethanol mist CVD(2007-11-01); ; Tuantranont, A.Uniform web-like films consisting single-walled carbon nanotubes (SWCNTs) were deposited on a silicon substrate using the chemical vapor deposition (CVD) of ferrocene-ethanol mist at atmospheric pressure (∼ 1 atm). The tiny mist was generated using a high-frequency ultrasonic vibration. The effects of various parameters including deposition position in the reactor, temperature, ferrocene/ethanol ratio, flow rate of carrier gas (argon), and deposition time on the formation of SWCNTs was investigated using high-resolution scanning electron microscopy, transmission electron microscopy and Raman spectroscopy. The worm region outside the furnace was found to be a suitable position for the formation of SWCNT films. The furnace temperature and the flow rate of carrier gas were found to determine the diameter and crystallinity of nanotube. The ferrocene concentration in ethanol strongly influenced the amount of impurity particles in the material. Moreover, the intensity of metallic tail in D-band was found to decrease with increasing the flow rate, showing a possibility of the formation of semiconducting SWCNTs. Results of this study can be used to improve understanding of the growth of SWCNTs by floating catalyst CVD of alcohol mist. © 2007 Elsevier B.V. All rights reserved. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Graphite-encapsulated iron particles grown by mist-CVD(2009-11-30)In this paper, a novel and simple method for synthesis of iron nanoparticles using a CVD of ferrocene-ethanol mist was proposed. By using this technique, graphite-encapsulated Fe2O3 nanoparticles could be synthesized at a low temperature of ∼400°C under 1 atm. The synthesis temperature as well as the deposition position and time were found to determine the amount of carbon-filament impurities in the obtained materials. The addition of water mist in the growth atmosphere was found to be a key parameter for eliminating carbon by-products due to the water-asisted etching effect. The result of this study could be useful for the production of graphite-encapsulated iron particles since our modified CVD technique is simple and low-cost. © 2009 American Institute of Physics. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Effect of the deposition condition for carbon nanotube thin films on gas sensing performance(2008-01-01); Tuantranont, A.A simple fabrication process for single-walled carbon nanotube (SWCNT)-based sensors was reported. By using chemical vapor deposition (CVD) of alcohol-ferrocene mist, SWCNT films could be directly deposited on patterned Al electrodes to fabricate a sensor. The effects of depositing position along the inner quartz reactor on the properties of SWGNT films (morphology, structure and purity) and the characteristics of sensors (response and reproducibility) were investigated. The SWCNT-film-based sensors fabricated at low substrate temperatures of 200-700 °C exhibited a reasonably good sensitivity to saturated organic vapor (ethanol, methanol and acetone) and showed a fair reproducibility even operated at a room temperature (∼28 °C). Copyright © 2008 American Scientific Publishers All rights reserved.