Strain-Sensing Characteristics of Multi-Walled Carbon Nanotube Sheet
분야
공학 > 전기공학
저자
( Dae Woong Jung ) , ( Gil S Lee )
발행기관
한국센서학회
간행물정보
센서학회지 2013년, 제22권 제5호, 315~320페이지(총6페이지)
파일형식
26401637.pdf [무료 PDF 뷰어 다운로드]
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    영문초록
    In this paper, the properties of strain sensors made of spin-capable multi-walled carbon nanotubes (MWCNTs) were characterized and their sensing mechanisms analyzed. The key contribution of this paper is a new fabrication technique that introduces a simpler transfer method compared to spin-coating or dispersion CNT. Resistance of the MWCNT sheet strain sensor increased linearly with higher strain. To investigate the effect of CNT concentration on sensitivity, two strain sensors with different layer numbers of MWCNT sheets (one and three layers) were fabricated. According to the results, the sensor with a three-layer sheet showed higher sensitivity than that with one layer. In addition, experiments were conducted to examine the effects of environmental factors, temperature, and gas on sensor sensitivity. An increase in temperature resulted in a reduction in sensor sensitivity. It was also observed that ambient gas influenced the properties of the MWCNT sheet due to charge transfer. Experimental results showed that there was a linear change in resistance in response to strain, and the resistance of the sensor fully recovered to its unstressed state and exhibited stable electromechanical properties.
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