한국세라믹학회지 (Journal of the Korean Ceramic Society)

  • 제54권6호
  • /
  • Pages.535-538
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  • 2017
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  • 1229-7801(pISSN)
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  • 2234-0491(eISSN)
한국세라믹학회 (The Korean Ceramic Society)
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Tunable Electrical Properties of Aligned Single-Walled Carbon Nanotube Network-based Devices: Metallization and Chemical Sensor Applications

  • Kim, Young Lae (Department of Mechanical and Industrial Engineering, Northeastern University) ;
  • Hahm, Myung Gwan (Department of Materials Science and Engineering, Inha University)
  • 투고 : 2017.09.27
  • 심사 : 2017.10.19
  • 발행 : 2017.11.30
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초록

Here we report the tunable electrical properties and chemical sensor of single-walled carbon nanotubes (SWCNTs) network-based devices with a functionalization technique. Formation of highly aligned SWCNT structures is made on $SiO_2/Si$ substrates using a template-based fluidic assembly process. We present a Platinum (Pt)-nanocluster decoration technique that reduces the resistivity of SWCNT network-based devices. This indicates the conversion of the semiconducting SWCNTs into metallic ones. In addition, we present the Hydrogen Sulfide ($H_2S$) gas detection by a redox reaction based on SWCNT networks functionalized with 2,2,6,6-Tetramethylpiperidine-1-oxyl (TEMPO) as a catalyst. We summarize current changes of devices resulting from the redox reactions in the presence of $H_2S$. The semiconducting (s)-SWCNT device functionalized with TEMPO shows high gas response of 420% at 60% humidity level compared to 140% gas response without TEMPO functionalization, which is about 3 times higher than bare s-SWCNT sensor at the same RH. These results reflect promising perspectives for real-time monitoring of $H_2S$ gases with high gas response and low power consumption.

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참고문헌

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