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이현주,김대웅,홍종욱,심일운,Yi, Hyeon-Ju,Kim, Dae-Wung,Hong, Jong-Ouk,Shim, Il-Wun 국립문화재연구소 2005 保存科學硏究 Vol.26 No.-
This study carried out to understand thermoluminescence dating of ancient tiles at Jinju Janghungri Kilin site. Also radiocarbon dating by the benzene synthesis method and Liquid scintillation counting method were performed for comparison for the agedetermination of charcoal sample at the obtained same site.1st and 2nd glow curve were obtained according to the typical method thermoluminescence. Plateau tests of revealed the proper temperature range to be $300~440^{\circ}C$ Palaeodose average values were formed to the 2.44Gy.Annual dose of ancient tiles was calculated from soil samples and ancient tiles it self by measuring alpha radiation dose, potassium concentrations and water contents respectively. Annual dose average values were calculated to be 7.012mGy/yr.The radiocarbon age(BP year) was converted to calibrated age(AD/BC year) using high precision curve. Radiocarbon ages were calculated to be AD 15~17 .Comparison of samples with their radiocarbon and thermoluminescence ages for revealed the in range the AD 15~17. This result means that the measured absolute ages are in good agreement with each other within the margin of error.
다중기포 소노루미네센스를 이용한 CdS/TiO₂ 나노입자의 제조
변기택(Ki-Taek Byun),이승수(Seung Soo Lee),심일운(Il-Wun Shim),곽호영(Ho-Young Kwak) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
Sonoluminescence (SL) is the light emission associated with the catastrophic bubble collapse of a gas bubble oscillating under an ultrasonic field. At the collapse, the bubble produces high temperature and pressure at liquid layer, where high energy chemical reaction can be possible. In the case of the MBSL, a lot of transient bubbles can be generated by the irradiation of high intensity ultrasound in aqueous solution. In this study, synthesis of cadmium sulfide(CdS) and a preparation of the nanoparticles coated on submicron titanium dioxide particles under ultrasonic field at the multibubble sonoluminescence(MBSL) condition were tried. At the optimal MBSL condition in aqueous solution containing cadium chloride of 8.8 wt%, thioacetamide of 11.5 wt% and TiO₂ of 0.8 wt%, CdS nanoparticles were synthesized first and subsequently nanoparticles of several nanometers of CdS/TiO₂(TiO₂ particles coated with CdS nanoparticles) particles were synthesized within 5 minutes. The prepared particles of CdS/TiO₂ were examined by XRD, EDS, UV-vis spectrophotometer, FE-SEM and TEM. The synthesized CdS/TiO₂ particles may be used for a material to reduce the recombination loss in dye solar cell unit.
다중기포 소노루미네센스를 이용한 β<SUB>bc</SUB> 형 수산화니켈의 제조
변기택(Ki-Taek Byun),서국원(Kook Won Seo),심일운(Il-Wun Shim),곽호영(Ho-Young Kwak) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
Nanosized nickel hydroxide powder for alkine batteries was synthesized in aqueous or nonaqueous solution of nickel chloride with NaOH under ultrasound radiation at the multibubble sonoluminescence (MBSL) condition. Characterization by X-ray diffraction, transmission electron microscopy, FT-IR spectroscopy, as well as elemental analysis indicates the formation of β<SUB>bc</SUB>-type nickel hydroxide. The β<SUB>bc</SUB>-type nickel hydroxide synthesized in aqueous solution of NiCl₂ is slightly different that formed in nonaqueous solution of NiCl₂. The synthetic process of β<SUB>bc</SUB>-type nickel hydroxide at the MBSL condition was completed within 5 minutes. Coating of nickel hydroxide particles on various oxide particles such as Al₂O₃ and SiO₂ was also prepared at the MBSL condition.
프살로 시아닌 철을 포함하는 1차원 폴리 - 인 고분자 화합물의 합성 및 분광학적 연구
심일운 中央大學校 自然科學硏究所 1988 自然科學硏究所 論文集 Vol.2 No.-
Phthalocyanine Iron이 p-diethynyl benzo 그룹에 의한 다리결합을 통해 1차원적인 구조를 갖는 고분자 화합물이 dichlorophthalocyaninato Iron 및 p-diethynyl benzene의 Na 염과의 염 제거 반응에 의해 합성되었으며, 여러가지 분광학적 방법에 의해 분석 되었다. 이 무기고분자 화합물은 320℃까지 매우 안정 하였으며 전기적으로 부도체였다. 또한 이 고분자화합물과 Br₂를 에테르 용액에서 반응 시켰을 때 Doping, 또는 부가 반응은 일어나지 않았으며 PcFe 및 PcFeBr₂를 포함하는 호합물로 분해되었다.
최슬기,심일운 중앙대학교 기초과학연구소 2000 基礎科學硏究所 論文集 Vol.14 No.-
Iron complexes have been incorporated into cellulose acetate (CA) films as a dispersion medium using tetrahydrofubran(THF). The resulting light brown-colored homogeneous films of 10∼30 wt.% Fe metal complex concentration are found to be thermally stable up to 150℃ and the relatively electron rich oxygen atoms of acyl groups in cellulose acetate(CA) molecules are assumed to interact with Fe complexes on the basis of their infrared spectroscopic and thermal analysis. The reaction chemistry of Fe in CA has been investigated by reacting Fe sites with small gaseous molecules such as CO, H2, O2, NO and olefins in the temperature range of 25∼150℃. Various Fe-carbonyls, -hydride, -nitrosyl and -dioxygen species formed in CA films are characterized by infrared spectroscopy. The treatment of Fe-containing CA film with H2 gas at 120℃ produces small Fe metal particles of about 20∼120Å in diameter in CA, which showed various catalytic reactivity such as CO oxidation, NO reduction, and hydrogenation of olefins.