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CH<sub>3</sub>OH/H<sub>2</sub>O 가스의 기상활성법을 이용한 다이아몬드 박막성장 과정에서의 OES분석
이권재,고재귀,신재수,Lee, Kwon-Jai,Koh, Jae-Gui,Shin, Jae-Soo 한국재료학회 2003 한국재료학회지 Vol.13 No.1
The intensity is measured as functions of both distance from filament to substrate and $CH_3$OH/($CH_3$OH+$H_2$O) ratio by OES(Optical Emission Spectroscopy) to investigate the effects of activation species such as $H_{\alpha}$, $H_{\beta}$, H$\Upsilon\;C_3$, CH on diamond film growth.$ H_{\alpha}$ increases as $CH_3$OH composition decreases, while CH increases as $CH_3$OH composition increases. The intensity of $H_{\alpha}$ decreases as the distance increases and that of CH increases as the distance increases. The intensities of other activation species of $H_{\beta}$, H$\Upsilon\;C_3$, do not vary as a function of measured position distance. It varies randomly. It means that various parameters for depositing diamond thin film can be explained by the intensity(density) change of activation species, as a function of the distance of the filament.
γ-Fe<sub>2</sub>O<sub>3</sub> nano 입자의 광학적 특성에 관한 연구
이권재,안정희,신재수,김창만,오자끼 하지메,고재귀,Lee, Kwon-Jai,An, Jeung-Hee,Shin, Jae-Soo,Kim, Chang-Man,Ozaki, Hajime,Koh, Jae-Gui 한국재료학회 2006 한국재료학회지 Vol.16 No.12
The ${\gamma}-Fe_2O_3$ nano particles in the size range of $5{\sim}30$ nm were prepared by a chemical coprecipitation method. The nano particles were coated with 2nd surfactants for obtaining the water-based. The size effect of ${\gamma}-Fe_2O_3$ nano particles for the ultraviolet protection was investigated. The variation of the UV-Vis transmittance spectra as a function of wavelength for a ${\gamma}-Fe_2O_3$ nano particles were showed red-shifted increase with the particle size. The protective effects of UVA onset at near 469, 494, 591 nm for a particle size of 8.7, 9.1 and 12 nm. It is shown that the ${\gamma}-Fe_2O_3$ nano particles was good materials for protect of UV.
이권재,박혜윤,박주훈 호서대학교 기초과학연구소 2004 기초과학연구 논문집 Vol.12 No.1
현대 사회를 살아감에 있어 스트레스가 인간의 건강에 가장 좋지 않은 영향을 미 쳐서 많은 질병을 초래하고 있다. 그러기에 스트레스를 절감하는 많은 요소들을 찾아내고자 하는 노력이 여러 분야에서 나타나고 있다. 현재, 아로마테라피가 성행하면서 많은 사람들이 향료에 대한 관심이 급증하고 있고 실제로 스트레스가 많이 완화되는 효과를 경험하고 있다. 그래서 향과 스트레스는 어떤 관련을 가지고 있고 어떤 효과를 발휘하는지 살펴보고자 한다.
HFCVD법에 의한 H<sub>2</sub> 다이아몬드 박막 제조에 수소가 미치는 영향
이권재,신재수,권기홍,이민수,고재귀,Lee Kwon-Jai,Shin Jae-Soo,Kwon Ki-Hong,Lee Min-Soo,Koh Jae-Gui 한국재료학회 2004 한국재료학회지 Vol.14 No.12
The diamond thin films was deposited on Si(100) substrate by Hot Filament Chemical Vapor Deposition (HFCVD) method using supplied the $CH_{3}OH/H_{2}O$ mixtured gas with excess H_{2} gas. The role of hydrogen ion as the growth mechanism of the diamond deposit was examined and compared the $CH_{3}OH/H_{2}O$ with the $CH_4/H_2$. Pressures in the range of $1.1\sim290{\times}10^2$ Pa were applied and using $3.4\sim4.4$ kw power. It was investigated by Scanning Electron Microscopy(SEM) and Raman spectroscopy The H ion was etching the graphite and restrained from $sp^3\;to\;sp^2$. But excess $H_2$ gas was not helped diamond deposit using $CH_{3}OH/H_{2}O$ mixtured gas. It was shown that the role of hydrogen ion of deposited diamond films using $CH_{3}OH/H_{2}O$ was different from $CH_4/H_2$.
HFCVD법에 의한 ${CH_3}OH/{H_2}O$ 혼합기체의 다이아몬드 박막성장에 관한 연구
이권재,고재귀,Lee, Gwon-Jae,Go, Jae-Gwi 한국재료학회 2001 한국재료학회지 Vol.11 No.12
The diamond thin film was deposited on Si(100) substrate from$CH_3OH/H_2O$mixtured gas using a hot filament chemical vapor deposition(HFCVD) method. The deposition condition for samples has been varried with the$CH_3OH/H_2O$composition. Scanning electron microscopy(SEM) and Raman spectroscopy has been employed for the sample analysis. The diamond sample has been obtained below 20Pa with$CH_3OH/H_2O$mixtured gas. The crystallinity of diamond film improved as the composition $CH_3OH$decreases from 60Vol% to 52Vol%, and the sample structure changed from the cauliflower to the diamond structure. But the sample structure was becomes cauliflower at 50Vol% of in$CH_3OH$ in the $CH_3OH/H_2O$. It was shown that the$CH_3OH$ has threshold composition.
이권재,박혜윤,박주훈 호서대학교 기초과학연구소 2004 기초과학연구 논문집 Vol.12 No.1
향료산업이 대중화 되고 있는 요즘 다양한 분야에 향료가 사용되고 있다. 그래서 더욱 향료산업은 광범위해지고 시간이 지날수록 발전해 가는 것을 지켜볼 수가 있다. 이러한 시점에서 향료산업에 대한 이해와 응용이 어떻게 이루어지고 있는지 살펴보고자 한다. 향료의 정의, 분류, 구성요소에 대해 살펴보고 향조의 분류별로 배치되는 향들을 살펴보겠다. 또한, 주요 제품들에는 어떠한 목적을 가지고 향이 사용되는지와 향료산업에 대해 깊이 고찰해 보고자 한다.