http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
ZnO 나노와이어를 이용한 FET 소자 제작 및 특성 평가
김경원(K.W. Kim),오원석(W.S. Oh),장건익(G.E. Jang),박동원(D.W. Park),이정오(J.O. Lee),김범수(B.S. Kim) 한국표면공학회 2008 한국표면공학회지 Vol.41 No.1
The zinc oxide(ZnO) nanowires were deposited on Si(001) substrates by thermal chemical vapour deposition without any catalysts. SEM data suggested that the grown nanostructures were the well-aligned ZnO single crystals with preferential orientation. Back-gate ZnO nanowire field effect transistors(FET) were successfully fabricated using a photolithography process. The fabricated nanowire FET exhibits good contact between the ZnO nonowire and Au metal electrodes. Based on I-V characteristics it was found out that the ZnO nonowire revealed a characteristic of n-type field effect transistor. The drain current increases with increasing drain voltage, and the slopes of the Ids-Vds curves are dependent on the gate voltage.
3차원 튜브 뱅크 주위의 난류 유동장 및 열전달에 대한 수치 해석적 연구
박상길,김경원,유홍선,최영기,Park, S.K.,Kim, K.W.,Ryou, H.S.,Choi, Y.K. 대한설비공학회 1996 설비공학 논문집 Vol.8 No.3
Turbulent flow and heat transfer characteristics around staggered tube banks were studied using the 3-D Navier-Stokes equations and energy equation governing a steady incompressible flow, which were reformulated in a non-orthogonal coordinate system with cartesian velocity components and discretized by the finite volume method with a non-staggered variable arrangement. The predicted turbulent kinetic energy using RNG $k-{\varepsilon}$ model was lower than that of standard $k-{\varepsilon}$ model but showed same result for mean flow field quantities. The prediction of the skin friction coefficient using RNG $k-{\varepsilon}$ model showed better trend with experimental data than standard $k-{\varepsilon}$ model result. The inclined flow showed higher velocity and skin friction coefficient than transverse flow because of extra strain rate ($\frac{{\partial}w}{{\partial}y}$). Also, this was why the inclined flow showed higher local heat transfer coefficient than the transverse flow.