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MOS소자의 스페이셔를 규소산화막 대신 폴리실이콜으로 제작한 MOS소자의 특성
윤창주 全北大學校 1995 論文集 Vol.40 No.-
MOS with polysilicon spacer was fabricated, and its electrical characteristics were compared with those of MOS with silicon oxide spacer. The 0.3 um gate MOS with polysilicon spacer showed enhanced device performances such as 9% higher current drivability and 4 times lower DIBL leakage current. It was suggested that simple fabricated device with polysilicon spacer can emulated the performance of such complicated fabricated devices as ITLDD or GOLD, when polysilicon is used for spacer material in the MOS fabrication instead of silicon oxide which has a relatively low dielectrics constant.
티오아세트아미드와 디메틸아세트아미드 사이의 분자간 상호작용에 미치는 용매효과
윤창주,최영상 가톨릭대학교 자연과학연구소 1988 자연과학논문집 Vol.10 No.-
DMA-CCl₄와 DMA-CH₃CN 혼합용매에서 TA의 아미노기의 용매이동과 선모양을 혼합용매의 조성의 함수로 측정하였다. -NH₂기의 양성자 선 모양에서 TA는 CCl₄와 같은 비극성 용액 계에서 N-H…S=C 결합을 통하여 자체회합을 하고 있음이 발견되었다. 용매이동의 값으로 부터 TA와 DMA 사이의 수소결합에 대한 평형상수는 CCl₄와 CH₃CN용액 계에서 각각 9.22ㆍ10^(-2) 및 1.96ㆍ10^(-1)이었다. The solvent shifts of the amino group of TA in DMA-CCI₄ and in DMA-CH₃CN mixed solvents have been measured as a function of compositions of the mixed solvents. From the nmr line shapes of NH₂ group, it was shown that TA molecules self-associate through N-H…S=C bond in non-polar CCI₄ solvents. And from the solvent shifts the equilibrium constants for the H-bonding between TA and DMA have been calculated. The equilibrium constants were 9.22·10^(-2) and 1.96·10^(-1) in CC1₄ and in CH₃CN, respectively.
윤창주,유지현,양현진,김택성,정태수,홍광준 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.60 No.11
Using the hot wall epitaxy method, we grew CdS epilayers on GaAs substrates. From the photocurrent (PC) measurement, the peaks corresponding to excitons A and B were observed in the short-wavelength region. Also, a crystal field splitting of 0.026 eV was extracted through the PC spectroscopy method. The PC intensities decreased with decreasing temperature. In the log Jph vs. 1/T plot, the dominant level was observed in the high-temperature region, and its activation energy was 33.9 meV. From the photoluminescence (PL) experiment, the PL intensities of the free exciton were exponentially reduced with increasing temperature. From the relations of log IPL vs. 1/T, an activation energy of 29.7 meV was observed in the high-temperature region. By comparing the PC and the PL results, we found that these activation energies were the thermal dissociation energies of the free exciton at the ground state and corresponded to the binding energies of the free exciton. Thus, we suggest that this trapping center limits the PC signal with decreasing temperature. Furthermore, the band gap energy of CdS as a function of temperature was well described by <I> E<SUB>g</SUB></I>(<I>T</I>) = 2.581<I> </I>?(6.1x10<SUP>-4</SUP>)<I>T<SUP>2</SUP></I>/(248+<I>T</I>).
朴冕用,尹昌柱 聖心女子大學校 1969 論文集 Vol.1 No.-
From the by-product obtained from Tungsten ore by floatation, sulfide of molybdenum was extracted. The sulfide was extracted from the nitric acid solution(1.5 equivalents of 3 M HNO) at 60℃ for 2 hours and then 1 M hydrochloric acid solution for 1 hour. The recovery of the sulfide was 73%.
용매의 유전상수와 Reichardt의 경험적 파라미터 E_(T)(30)사이의 상호관계
윤창주 가톨릭대학교 자연과학연구소 1993 자연과학논문집 Vol.14 No.-
극성 용매의 경험적 파라미터인 E_(T)(30)의 속성을 설명하는 모형을 유전상수로 구할 수 있는 끈끈도 파라미터와 내부 에너지 변화와 관련된 이중극자-이중극자 상호작용 에너지 인자와 관련지어 제시하였다. 그 결과를 15가지 용매에 응용하였다. 양성자성 용매와 비양성자성 용매의 성질의 차이가 뚜렷하게 나타나면서 E_(T)(30)의 의미를 자세하게 이해할 수 있는 기틀을 마련하였다. The empirical solvent parameter E_(T)(30) is shown to be correlated with the stickiness parameters and the dipole-dipole interaction factors obtained from dielectric constants of solvents. This model is examind for 15 selected polar solvents in which some are protic. There are big difference between protic and dipolar aprotic solvents. The propeties of E_(T)(30) is described detail with this simple relatioships.
마크로-고리 화합물을 함유한 액체막의 특성에 관한 연구 : 칼륨 이온 운반에 미치는 음이온 효과
김시중,이심성,이선혜,윤창주 聖心女子大學校 1982 論文集 Vol.13 No.2
디벤조-18-크라운-6가 함유된 액체막을 통한 피크린산칼륨과 요오드화칼륨의 운반속도를 각 칼륨염의 농도 변화에 따라 측정하였다. 음이온의 종류에 따라 운반 메카니즘이 크게 다르게 나타나고 있다. 피크린산칼륨은 이온 확산에 가깝고, 요오드화칼륨은 이온 쌍 확산으로 운반되는 것 같다. The transport mechani는 of potassium picrate and potassium iodide across the liquid membrane containing dibenzo-18-crown-6 were studied by measuring the transport rate of the potassium salts. Potassium picrate seems to be transposted by the ionic diffusion but potassium iodide by the ion-pair.
Growth of and Oxygen-Flow In uence on ZnO Layers Grown by Using RF Magnetron Sputtering
윤창주,D. S. Park,J. H. Yu,김정현,정태수 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.6
Epitaxial ZnO layers were grown on Al2O3 substrates by using the RF magnetron sputtering method. The structural and the optical properties were investigated as the O2 pressure was in-creased. When O2 pressure was controlled, ZnO layers were strongly oriented along the c-axis of the hexagonal structure and their biaxial stress was nearly strain free. From the transmittance mea-surements, the ZnO layers showed an average transmittance of over 90 % and the absorption edge shifted toward the short-wavelength region with increasing O2 flow. From the photoluminescence measurements, the intensities of the near-band-edge and of the red emission increased and decreased with increasing O2 pressure, respectively. As the O2 pressure was increased, the oxygen-vacancy reduction in the ZnO layers is thought to be responsible for the improvement in the crystal's quality. However, there wasn't any continued crystal-quality improvement at over ow O2 pressure.