• Title/Summary/Keyword: Molecular engineering

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Molecular Dynamics Study on Evaporation Process of Adherent Molecules on Surface by High Temperature Gas

  • Yang, Young-Joon;Osamu Kadosaka;Masahiko Shibahara;Masashi Katsuki;Kim, Si-Pom
    • Journal of Mechanical Science and Technology
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    • v.18 no.12
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    • pp.2104-2113
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    • 2004
  • Surface degreasing method with premixed flame is proposed as the removal method of adherent impurities on materials. Effects of adherent molecular thickness and surface potential energy on evaporation rate of adherent molecules and molecular evaporation mechanism were investigated and discussed in the present study. Evaporation processes of adherent molecules on surface molecules were simulated by the molecular dynamics method to understand thermal phenomena on evaporation processes of adherent molecules by using high temperature gas like burnt gas. The calculation system was composed of a high temperature gas region, an adherent molecular region and a surface molecular region. Both the thickness of adherent molecules and potential parameters affceted the evaporation rate of adherent molecules and evaporation mechanism in molecular scale.

Patterning of conducting polymer at micron- scale using a selective surface treatment

  • Lee, Kwang-Ho;Kim, Sang-Mook;Kim, Ki-Seok;Song, Sun-Sik;Kim, Eun-Uk;Jung, Hee-Soo;Kim, Jin-Ju;Jung, Gun-Young
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.834-836
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    • 2008
  • We demonstrated micro-scale conducting polymer patterning based on a selective surface treatment. A substrate with a patterned photoresist was immersed into OTS (Octadecyltrichlosilnae) solution. The protected substrate areas were hydrophilic after removing the PR resist, where a conducting polymer solution was coated selectively by spin-coating method.

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Diffusion-Influenced Kinetics of Reactions Involving Polymers

  • Sung, Jae-Young;Park, Pyeong-Jun;Lee, Jin-Uk;Lee, Woo-Jin;Kim, Ji-Hyun;Lee, Sang-Youb
    • Bulletin of the Korean Chemical Society
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    • v.24 no.6
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    • pp.843-852
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    • 2003
  • We present a brief account of the theory of diffusion-influenced kinetics of reactions involving polymers. The review will be based on the recent contributions from the authors. Both intrapolymer and interpolymer reactions are considered, and the effects of various physical factors, such as the chain length, chain stiffness, and hydrodynamic interactions, are described within a unified theoretical framework.