RFCVD 장치를 이용하여 성장한 실리콘 나노와이어의 특성

김재훈,이형주,신석승,김기영,고춘수,김현숙,황용규,이충훈,Kim, Jae-Hoon,Lee, Hyung-Joo,Shin, Seok-Seung,Kim, Ki-Young,Go, Chun-Soo,Kim, Hyun-Suk,Hwang, Yong-Gyoo,Lee, Choong-Hun 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.2

We have synthesized silicon nanowires by using RFCVD(Radio Frequency Chemical Vapor Deposition) system on Au deposited p-type Si(100) wafers, and investigated their physical and electrical properties. The silicon nanowires had been grown in the atmospheres of $H_{2},\;N_{2}\;and\;SiH_{4}$ at 10 Torr at the substrate temperatures of $700{\pm}5^{\circ}C\;and\;810{\pm}5^{\circ}C$ respectively. FE-SEM analysis revealed that diameters of the silicon nanowires are $50{\sim}60nm$ with the length of several ${\mu}m$. XRD analysis showed that the growth direction of the nanowires is Si[111]. Field emission characteristics showed that the turn-of voltages at the current of $0.01\;mA/cm^{2}$ are $10\;V/{\mu}m\;and\;8.5\;V/{\mu}m$ for the wires grown at $700{\pm}5^{\circ}C\;and\;810{\pm}5^{\circ}C$, respectively.

플라즈마 조사에 의한 전기분무합성 SiO₂ 코팅층의 물접촉각 변화

김재훈,이준성,김지영,김상섭,Kim, Jae-Hun,Lee, Junseong,Kim, Ji Yeong,Kim, Sang Sub 한국재료학회 2014 한국재료학회지 Vol.24 No.11

Hydrophilic $SiO_2$ layers were obtained by the atmospheric-pressure plasma treatment. Superhydrophobic $SiO_2$ layers were first deposited by the electrospray deposition method. The electrospunable solution that was prepared based on the solgel method was sprayed on Si (100) substrates. The surface of the electrosprayed $SiO_2$ layers consisted of the agglomeration of nano-sized grains, which led to a very high roughness and revealed a very high contact angle to water droplets over $162^{\circ}$. After having been exposed to the atmospheric $Ar/O_2$ plasma, the observed superhydrophobicity of the $SiO_2$ layers were greatly changed: a dramatic variation of the water contact angle from $162^{\circ}$ to $3^{\circ}$, namely realization of superhydrophillicity. Interestingly, the surface microstructure was almost preserved. According to the XPS analysis, it is more likely that thanks to the plasma exposure, the surface of $SiO_2$ layers will be cleaned in terms of organic species that are hydrophobic-inducing, consequently leading to the hydrophilic nature observed for the plasma-exposed $SiO_2$ layers.

탄소섬유 보강재로 보강한 RC 보의 보강효과에 관한 실험적 연구

김재훈,박성무,강주원,Kim, Jae-Hun,Park, Sung-Moo,Kang, Joo-Won 한국공간구조학회 2005 한국공간구조학회지 Vol.5 No.4

Bonded CFRP Plate method used murk in reinforcement method is very efficient for stress increment of reinforced members. But CFRP plate dosen't display enough its capacity and have the destruction characteristic of premature failure that reach failure by debond plate, because near-surface-bond using epoxy. Such destruction character of reinforced specimens take the influence at variables as steel reinforcement ratio, concrete strength, kind of reinforcement materials, reinforced length, property of epoxy used in binder and so on. In this study, performed experiment results are compared and considered on flexural performance of Near Surface Mounted Reinforcement used CFRP-Rod, as complement about structural behavior of RC beam reinforced flexural capacity in CFRP plate and premature failure of reinforcement material. Main variables of RC beam applied CFRP Plate external bond method are experimental variables as reinforcement length, reinforcement position (tension face and side face of beam) and existence of ironware in end parts. In case of CFRP-Rod, variable is reinforcement length.

대한불교조계종 중앙기록관 역사기록전시 - 기록으로 보는 한국불교와 조계종 -

김재훈,이경훈,Kim, Jae-Hun,Lee, Kyung-Hoon 한국기록학회 2006 기록학연구 Vol.0 No.13

기록을 관리하는 궁극의 목적은 이용 제공에 있다. 기록물전시회는 기록관 및 기록관리에 대한 대중적 인지도를 높이고, 이에 대한 관심을 제고시킬 수 있는 기회가 된다. 또한, 미지의 이용자에게 적극적으로 접근하여 서비스를 제공할 수 있다. 아울러, 아키비스트에게는 소장하고 있는 기록물에 대한 개괄적인 분류 및 평가를 할 수 있는 기회를 제공하기도 한다. 이러한 기록전시의 기능과 중요성에도 불구하고 기록물전시회를 개최한 기관 및 단체는 아직 많지 않은 형편이다. 본고에서는 대한불교조계종 중앙기록관의 역사기록전시 사례를 바탕으로 전시기획, 기록물 선별 및 전시 실제에 대하여 소개함으로써 기록전시의 참고 유형을 제시하고자 한다. The ultimate purpose of records management is for reference service. Archival exhibition provides an opportunity to raise the public's interest at archives and maintain records management and to offer the reference service to unknown users. As for archivists, archival exhibition allows to summarize generally the archives that he may have and to appraise its value. At the opening of the Memorial hall for the history and culture of Korean buddhism, the Archives of Jogye Order of Korean Buddhism held an archival exhibition by showing archives of Korean Buddhism History to the public. The exhibition mainly consists in 2 themes: History of Jogye Order of Korean Buddhism and its activities. Over 300 archives were selected in accordance with historicity, rarity and particularity of each archives that the Jogye Order of Korean Buddhism posses. The present paper aims to suggest different models of Archival Exhibition with the help of detailed explanation on Exhibition planning, Selection of archives and the practice.

플렉시블 LCD 모드

김재훈,Kim, Jae-Hun 한국정보디스플레이학회 2006 인포메이션 디스플레이 Vol.7 No.3

산화물 나노섬유를 이용한 가스센서

김재훈,김상섭,Kim, Jae-Hun,Kim, Sang-Seop 한국전기전자재료학회 2016 E²M-전기 전자와 첨단 소재 Vol.29 No.12

액정을 이용한 광소자의 개발 동향

김재훈,Kim, Jae-Hun 한국정보디스플레이학회 2002 인포메이션 디스플레이 Vol.3 No.1

시간지연과 입력포화를 갖는 T-S 퍼지 카오스 시스템의 동기화

김재훈,신현석,김은태,박민용,Kim Jae-Hun,Shin Hyunseok,Kim Euntai,Park Mignon 대한전자공학회 2005 電子工學會論文誌-SC (System and control) Vol.42 No.1

본 논문에서는 시간지연과 입력포화를 갖는 카오스 시스템에 대한 퍼지 모텔 기반의 동기화 기법을 제안한다. 시간지연을 갖는 카오스 마스터 시스템과 슬레이브 시스템을 모델링하기 위해 Takagi-Sugeno(T-S) 퍼지 모델을 이용한다. 특히 슬레이브 시스템은 제어 입력이 제한되는 입력포화 특성을 갖는다고 가정한다. 선형 오차 피드백과 병렬 분상 보상(PDC) 방법에 따라 퍼지 카오스 동기화 시스템을 설계하고 동기화 오차 시스템의 국소 안정도 조건을 해석한다. 신호 전송 채널에는 시간지연이 항상 존재하므로 채널 시간지연 또한 고려한다. 입력포화와 시간지연을 갖는 퍼지 동기화 시스템의 국소 안정도에 대한 충분 조건은 Lyapunov-Krasovskii 이론을 적용하여 선형 행렬 부등식 (LMI) 문제의 해를 통해 얻어진다. 제안된 동기화 기법의 효과를 확인하기 위해서 모의 실험을 수행한다. This paper presents a fuzzy model-based approach for synchronization of time-delay chaotic system with input saturation. Time-delay chaotic drive and response system is respectively represented by Takagi-Sugeno (T-S) fuzzy model. Specially, the response system contains input saturation. Using the unidirectional linear error feedback and the parallel distributed compensation (PDC) scheme, we design fuzzy chaotic synchronization system and analyze local stability for synchronization error dynamics. Since time-delay in the transmission channel always exists, we also take it into consideration. The sufficient condition for the local stability of the fuzzy synchronization system with input saturation and time-delay is derived by applying Lyapunov-Krasovskii theory and solving linear matrix inequalities (LMI's) problem. A numerical example is given to demonstrate the validity of the proposed approach.

카본블랙에 의한 천연고무 물성치와 피로수명 변화에 대한 실험적 연구

김재훈,김영학,정현용,Kim, Jae-Hun,Kim, Yeong-Hak,Jeong, Hyeon-Yong 대한기계학회 2001 大韓機械學會論文集A Vol.25 No.11

The effects of carbon black on the material properties and the fatigue life of the carbon-black filled natural rubbers were investigated. Different kinds of carbon blacks resulted in different fatigue lives, hysteresis, and critical J-values. It was noticed that the hysteresis was inversely proportional to the difference between DBPA and CTAB, and the critical J-value was almost the same regardless of the length of a precrack. In addition, different kinds of carbon blacks resulted in different fracture morphologies, and micro-scale and macro-scale roughnesses. The critical J-value was proportional to the micro-scale roughness. and it seemed relate to the size distribution of carbon black particles. By reviewing all the experimental data. it was finally noticed that the logarithmic value of the fatigue life could be linearly expressed by a multiplication of the critical J-value and the logarithmic value of the hysteresis.

양돈장의 호흡기질병 발생 동향과 피해액

김재훈,Kim, Jae-Hun 대한양돈협회 1996 養豚 Vol.18 No.9