• Title/Summary/Keyword: C-Lab

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Formulation of Carbon Nanotube Paste and Its Optimization for Field Emission Display Applications

  • Kim, Yong-C.;Sohn, K.H.;Cho, Y.M.;Yoo, Eun-H.;Lee, Dong-Gu
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.696-699
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    • 2004
  • Of the emissive display technologies, field emission displays using pasted carbon nanotubes offer several advantages over other competing cathode materials such as low driving voltage, possible large-area and low-cost processes. In this study, formulation of carbon nanotube paste and its electron field emission properties are characterized. Also the effects of additive powders and surface morphology on electron emission are reported.

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Post-Treatment of Printed Carbon Nanotubes for Vertical Alignment

  • Kim, Yong-C.;Sohn, K.H.;Cho, Y.M.;Yoo, Eun-H.
    • 한국정보디스플레이학회:학술대회논문집
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    • 2004.08a
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    • pp.692-695
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    • 2004
  • Fabrication of photosensitive carbon nanotubes paste and its post-treatment has been developed for high resolution with good electron emission uniformity. We report novel post-treatment techniques including rubber-rolling and multiple field emission cycling from which we could improve the field emission properties of printed carbon nanotubes. These techniques would be easily applicable to large area field emission display using paste of carbon nanotubes

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Electrical Properties of Carbon Fiber/Aluminum Composite (Carbon Fiber/ Aluminum 복합재료의 전기적 특성연구)

  • Han, Se-Won;Kim, Bong-Seo;Woo, Byung-Chu;Lee, Hee-Woong
    • Proceedings of the KIEE Conference
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    • 1991.07a
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    • pp.259-262
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    • 1991
  • Carbon fiber/Aluminum composites were fabricated vacuum hot press method with condition of $10^{-3}$ torr, 100MPa, $600^{\circ}C$, 30min. Microstructure, mechanical properties, electrical properties and thermal properties of CF/Al composites were studied.

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Eye Irritation Test of New Contact Lens Cleaner

  • Oh, Se-Woong;Ha, Jong-Ryul;Hong, Seong-Jin;Park, Kun-Hyock
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 1996.04a
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    • pp.274-274
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    • 1996
  • 1차적인 제형의 조제를 위해서 비이온성 계면활성제인 poloxamer 류, Tween 류, octylphenylether와 양심 계면활성제인betaine 류와 방부제인 croquat 류에 대한 시험을 실시하여 자극을 나타내지 않은 성분을 선별하였다. 이를 근거로 isotonic sodium borate 용액을 완충액으로 사용하여, 최종제형을 조제하여 시험한 결과 자극반응을 나타내지 알았으며, 본 제형을 실온과 4$0^{\circ}C$에서 2, 4, 6개월간 안정성 시험을 거친 후 시험시에도 전혀 자극반응을 나타내지 않았다.

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Synthesis of Cephalosporins Having a Heterocyclic Group at the C-3 Position

  • Myung Hee Jung;Kul-Woong Cho;Wan Joo Kim;Joon-Seob Shin;Choong Sil Park
    • Bulletin of the Korean Chemical Society
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    • v.14 no.1
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    • pp.32-38
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    • 1993
  • 3-(3-Bromotetrahydrofuran-2-yl)-3-cephem 7 was obtained from 3-(2-hydroxyethyl)vinyl-3-cephem 6 by the cyclization reaction using N-bromosuccinimide. Compound 5 was prepared by Wittig reaction, namely a coupling of cephem-derived triphenylphosphonium salt 3 with aldehyde component 4 in the presence of base.