• Title/Summary/Keyword: nano film

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Microclimate and Crop Growth in the Greenhouses Covered with Spectrum Conversion Films using Different Phosphor Particle Sizes (광전환재 크기가 다른 광전환 필름 피복 온실 내 미기상 및 작물 생육)

  • Park, Kyoung Sub;Kwon, Joon Kook;Lee, Dong Kwon;Son, Jung Eek
    • Journal of Bio-Environment Control
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    • v.25 no.2
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    • pp.111-117
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    • 2016

  • The objective of this study was to analyze the microclimate and the growth of tomato and lettuce in the greenhouses covered with spectrum conversion films using different phosphor particles sizes. Two spectrum conversion films using phosphor particles larger than $10{\mu}m$ (Micro-film) and smaller than 500 nm (Nano-film) in radius, and poly-ethylene (PE) film were used in double-layered greenhouses as outer coverings. PE films were used as inner coverings in all the greenhouses. Thickness of the films for inner and outer coverings was 0.06 mm. Tensile strength, elongation, and tearing resistance of the Micro- and Nano-films were not different from those of the PE film. Transmittances at a wavelength of 300-1100 nm were a little higher at the Micro-film and lower at the Nano-film than that of the PE film, respectively. Air temperatures at the Micro- and Nano-films were over $2^{\circ}C$ higher than at the PE film, but no significant difference was observed between the two light conversion films. The soil temperature at the Nano-film was $1.5^{\circ}C$ and $3^{\circ}C$ higher than at the Micro- and PE films, respectively. The yields of tomato at the Micro- and Nano-films were 12% and 14% higher than at the PE film, but no significant difference was observed between the two spectrum conversion films. The total soluble solid showed no significant differences among all the films. The yields of lettuces at the Micro- and Nano-films were 27% and 59% higher than at the PE film. Hunter's red (a) value of the lettuce leaf was the highest at the Nano-film. In this experiment, tomatoes requiring high irradiation were better at the Nano film, while lettuce requiring low irradiation better at the Micro film.

  • https://doi.org/10.12791/KSBEC.2016.25.2.111 인용 PDF KSCI

Commercialization & Process Optimization of Protective Film on Nano Silver Transparent Conductive Substrate by Means of Large Scale Roll-to-Roll Coating and Experimental Design (나노실버 투명전도소재 보호필름의 개발 및 공정 최적화와 실험 계획법을 이용한 검증)

  • Park, Kwang-Min;Lee, Ji-Hoon
    • Journal of the Korean Institute of Electrical and Electronic Material Engineers
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    • v.28 no.12
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    • pp.813-820
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    • 2015

  • We have studied commercialization and process optimization of protective film on transparent conductive coated substrate, nano silver on flexible PET (poly ethylene terephthalate), by means of roll-to-roll micro-gravure coater. Nanosilver on flexible PET substrate is potential materials to replace ITO (indium tin oxide). Protective film is most important to maintain unique silver pattern on top of transparent PET. PSA pressure sensitive adhesives) was developed solely for nano silver on PET and protective film was successfully laminated. We have optimized all process conditions such as coating thickness, line speed and aging time & temperature via experimental design. Transparent conductive film and its protective film developed in this research are commercially available at this moment.

  • https://doi.org/10.4313/JKEM.2015.28.12.813 인용 PDF KSCI

A measurement technique for residual thickness of nano-imprinted polymer film using nano-indentation. (나노인덴테이션을 이용한 나노 임프린트된 폴리머 박막의 잔류두께 측정기법)

  • Lee, H.J.;Ko, S.G.;Kim, J.H.;Hur, S.;Lee, E.S.;Jeong, J.H.
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.1921-1926
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    • 2003

  • Nano-imprint technology has been vigorously studied by many researchers for it is one of the most promising technologies for manufacturing the pattern with its critical dimension below 100nm. In the nano-imprint technology, nano patterns are transferred on a polymer film and the transferred patterns are used as an etch mask to define the designed patterns on a substrate or a metal layer. To this end, it is important to keep the residual thickness of the imprinted polymer film uniform. In this study, a novel measurement technique to measure the residual thickness of films is proposed based on nanoindentation theory. This technique has advantages of saving time and measuring the residual thickness of highly-localized portions in comparison with other techniques, but has limitation of requiring calibration process.

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