• Title/Summary/Keyword: KRISS

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International Comparison of high resistance and Mutual Recognition between National Metrology Institutes (전기저항의 국제비교 및 계측기술에 관한 국제적 상호인정 추세)

  • Yu, Kwang-Min;Ryu, Je-Cheon;Kang, Jeon-Hong;Kim, Han-Jun
    • Proceedings of the KIEE Conference
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    • 1999.07b
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    • pp.606-608
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    • 1999

  • Mutual Recognition Agreement(MRA) between national metrology institutes is started on October 1999 and International Key Comparison is essentially to be used as technical basis for the agreement. High resistance is one of the Key Comparison and high resistance measurement system is established in KRISS for the purpose of the Key Comparison. Total combined uncertainty of the system is about 4ppm in $10M{\Omega}$ and 8ppm in $1G{\Omega}$. With the system, the difference of comparison results for $10M{\Omega}$ and $1G{\Omega}$ among KRISS, VNIIM in Russia and NIM in China is agreed about 6ppm within total combined uncertainty of three institutes.

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Changes of Electrical Properties of Graphene upon Introduction of Structural Defects and Gas Exposure

  • Kim, Kang-Hyun;Kang, Hae-Yong;Lee, Jae-Woo;Lee, Nam-Hee;Woo, Byung-Chill;Yun, Wan-Soo
    • Proceedings of the Korean Vacuum Society Conference
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    • 2011.02a
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    • pp.474-474
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    • 2011

  • Graphene is considered as a potential candidate for the key material in the ideal 2D nanoelectronics. Recently, it is reported that graphene has an interesting sensitivity to molecular adsorption on it. Such properties are believed to be enhanced by the existence of disorders and ripples inside graphene as well as by the interaction with the substrate underneath. Here, we report the effect of introducing structural disorders to the graphene on its electrical properties such as conductance, transconductance, low frequency noise, which can be successfully described by a simple model of the continuum percolation. In addition, the response of the graphene device to gaseous molecular adsorption was systematically investigated and the results were discussed along with the change in Raman spectra.

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