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Liquid Crystal Orientation Properties on Homogeneous Polymer Surface by Various Alignment Methods
Kim. Young-Hwan, Lee. Kang-Min, Kim. Byoung-Yong, Oh. Byeong-Yun, Han. Jeong-Min, Seo. Dae-Shik 한국전기전자재료학회 Transactions on electrical and electronic materials 4 Pages
한국전기전자재료학회 Transactions on electrical and electronic materials 2009, Vol.10 No.1 16-19 (4 pages)
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Alignment Effect of a Nematic Liquid Crystal on Deposited SiOx Thin-Film Surface with e-beam Evaporation
Oh. Yong-Cheul, Lee. Dong-Gyu 한국전기전자재료학회 Transactions on electrical and electronic materials 4 Pages
한국전기전자재료학회 Transactions on electrical and electronic materials 2006, Vol.7 No.6 305-308 (4 pages)
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Vertical Alignment of Liquid Crystals by Ordering Effect of Self-assembled Monolayers on the Ion-beam-irradiated Anisotropic Surface
Park. Ji-Sub, Seok. Keun-Yeong, Hwang. Soo-Won, Kim. Jae-Chang, Yoon. Tae-Hoon, Kim. Jae-Hoon, Kim. Hak-Rin 한국정보디스플레이학회 Journal of information display 5 Pages
한국정보디스플레이학회 Journal of information display 2010, Vol.11 No.4 144-148 (5 pages)
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LC Aligning Capabilities of a Nematic Liquid Crystal on Homeotropic Polyimide Surface by New Ion-beam Irradiation
Ok. Chul-Ho, Kang. Dong-Hun, Lee. Kang-Min, Han. Jin-Woo, Kim. Byoung-Yong, Oh. Byeong-Yun, Kim. Young-Hwan, Hwang. Jeong-Yeon, Lee. San 한국전기전자재료학회 Transactions on electrical and electronic materials 3 Pages
한국전기전자재료학회 Transactions on electrical and electronic materials 2007, Vol.8 No.6 265-267 (3 pages)
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Advances in liquid crystalline nano-carbon materials: preparation of nano-carbon based lyotropic liquid crystal and their fabrication of nano-carbon fibers with liquid crystalline spinning
Yong-Mun Choi, in Jung Jun Yeon, Hwang Seung Min, Kim Hyeonsu Jeong, Bon-Cheol Ku, Munju Goh 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.4 1 223-232 (10 pages)
This review presents current progress in the preparation methods of liquid crystalline nanocarbon materials and the liquid crystalline spinning method for producing nano-carbon fibers. In particular, we focus on the fabrication of liquid crystalline carbon nanotubes by spinning from superacids, and the continuous production of macroscopic fiber from liquid crystalline graphene oxide. -
Statistical Modeling of Pretilt Angle Control using Ion-beam Alignment on Nitrogen Doped Diamond-like Carbon Thin Film
Kang. Hee-Jin, Lee. Jung-Hwan, Han. Jung-Min, Yun. Il-Gu, Seo. Dae-Shik 한국전기전자재료학회 Transactions on electrical and electronic materials 4 Pages
한국전기전자재료학회 Transactions on electrical and electronic materials 2006, Vol.7 No.6 297-300 (4 pages)
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Catalytic hydrogenation-assisted preparation of melt spinnable pitches from petroleum residue for making mesophase pitch based carbon fibers
Dong Hun Lee, Jisu Choi, Young Se Oh, Yoong Ahm Kim, Kap Seung Yang, Ho Jin Ryu, Yong Jung Kim 한국탄소학회 Carbon Letters 8 Pages
한국탄소학회 Carbon Letters 2017, Vol.24 4 28-35 (8 pages)
We demonstrated an effective way of preparing melt spinnable mesophase pitches via catalytic hydrogenation of petroleum residue (fluidized catalytic cracking-decant oil) and their subsequent thermal soaking. The mesophase pitches thus obtained were analyzed in terms of their viscosity, elemental composition, solubility, molecular weight, softening point and optical texture. We found that zeolite-induced catalytic hydrogenation under high hydrogen pressure contributed to a large variation in the... -
The effect of the spinning conditions on the structure of mesophase pitch-based carbon fibers by Taguchi method
Zhao Jiang, Ting Ouyang, Xiangdong Yao, Youqing Fei 한국탄소학회 Carbon Letters 10 Pages
한국탄소학회 Carbon Letters 2016, Vol.19 11 89-98 (10 pages)
While it was observed that thicker carbon fiber generally shows improved preferred orientation, the most important variable affecting the preferred orientation was found to be the entry angle. As the entry angle decreased from 120° to 60°, the shear flow was enhanced to induce more ordered radial alignment of crystallite planes so as to obtain carbon fibers with a higher degree of preferred orientation. As a consequence, the crack angle was increased, and the tensile modulus was improved. -
Bulk graphite: materials and manufacturing process
Sang-Min Lee, Dong-Su Kang and Jea-Seung Roh 한국탄소학회 Carbon Letters 12 Pages
한국탄소학회 Carbon Letters 2015, Vol.16 No.3 1 135-146 (12 pages)
Graphite can be classified into natural graphite from mines and artificial graphite. Due to its outstanding properties such as light weight, thermal resistance, electrical conductivity, thermal conductivity, chemical stability, and high-temperature strength, artificial graphite is used across various industries in powder form and bulk form. Artificial graphite of powder form is usually used as anode materials for secondary cells, while artificial graphite of bulk form is used in steelmaking... -
Fabrication and Applications of Carbon Nanotube Fibers
Hungo Choo, Yeonsu Jung, Youngjin Jeong, Hwan Chul Kim, Bon-Cheol Ku 한국탄소학회 Carbon Letters 14 Pages
한국탄소학회 Carbon Letters 2012, Vol.13 No.4 1 191-204 (14 pages)
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새로운 이온빔장치를 사용한 Twisted Nematic-LCD의 전기광학특성
김상훈, 황정연, 장미혜, 김귀열, 서대식, Kim. Sang-Hoon, Hwang. Jeoung-Yeon, Jang. Mi-Hye, Kim. Gwi-Yeol, Seo. Dae-Shik 한국전기전자재료학회 전기전자재료학회논문지 5 Pages
한국전기전자재료학회 전기전자재료학회논문지 2006, Vol.19 No.6 547-551 (5 pages)
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폴리이미드막에 있어서 네마틱 액정의 메모리 효과를 이용한 전사 배향법에 관한 연구
서대식, 이정호, 김진호, 이보호 한국전기전자재료학회 電氣電子材料學會誌= The journal of the Korean Institute of Electrical and Electronic Material Engineers 5 Pages
한국전기전자재료학회 電氣電子材料學會誌= The journal of the Korean Institute of Electrical and Electronic Material Engineers 1997, Vol.10 No.9 876-880 (5 pages)
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이온빔을 조사한 폴리스타일렌 기판에서의 액정의 배향특성
황현석, 이종덕, 노정규, 한정민, Hwang. Hyun Suk, Lee. Jong-Deok, Rho. Jungkyu, Han. Jeong-Min 통신위성우주산업연구회 통신위성우주산업연구회논문지 5 Pages
통신위성우주산업연구회 통신위성우주산업연구회논문지 2014, Vol.9 No.1 33-37 (5 pages)
본 연구에서는 이온빔을 조사한 폴리스타일렌 기판에 일정강도의 이온빔을 조사한 경우에 발생되는 액정배향의 특성에 대해서 연구하였다. 폴리스타일렌은 기계적강도 및 절연성에서 액정표시소자의 배향막으로 사용되는 폴리이미드 계열의 대체 물질로서 주목받고 있으며, 특히 비접촉 배향에서의 가능성이 새롭게 평가되고 있는 소재이다. 이온빔을 조사하여 이방성을 발생시킨 박막의 표면에서의 액정배향상태를 편광현미경으로 관찰하고, 액정배향에 기여한 메커니즘의 규명을 위해서 XPS(X-ray photoelectron spetroscopy) 분석을... -
LCD의 광시야각 기술개발 및 최신동향
서대식 한국전기전자재료학회 電氣電子材料學會誌= The journal of the Korean Institute of Electrical and Electronic Material Engineers 12 Pages
한국전기전자재료학회 電氣電子材料學會誌= The journal of the Korean Institute of Electrical and Electronic Material Engineers 1996, Vol.9 No.7 733-744 (12 pages)
본 논문에서는 최근 LCD소자에 있어서 큰 이슈로 등장한 표면 액정배향기술 및 광시야각 기술에 관하여 설명하였다. 표면 액정배향기술에 있어서는 종래의 러빙법에 대신하여 편광된 자외선을 조사하여 액정분자를 배열시키는 광배향제어법이 큰 기대를 모으고 있으며, 이 기술은 프리틸트 각 발생제어기술과 신뢰성이 과제로 남아있다. 광시야각 기술에 있어서는 최근까지 여러 방식이 제안되어왔으며 그 중에서도 현재로는 광학보상법, IPS방식 등이 실용화가 진행되고 있다. 그러나 향후 다른 방식의 기술발전 여부에 따라 상황이...
