The use of carbon nanotubes (CNTs) for construction of sensors is promising. This is due to some unique characteristics of CNTs. In recent years, strain sensors built from CNT composite films have been developed; however, their low piezoresistive sensitivity (gauge factor (GF)) in in-plane strain detection is a concern compared with other strain sensors. This article reports an experimental discovery of the superior piezoresistive response of a CNT film that is free of surfactants, known as the pure CNT film. The mechanism for the high GF with the pure CNT film strain sensors is also discussed.
LeeKLeeSSLeeJA (2010) Carbon nanotube film piezoresistors embedded in polymer membrane. Applied Physics Letter96: 13511–13515.
4.
LynchJPLohKJShimBSKotovNA (2007) Tailoring piezoresistive sensitivity of multilayer carbon nanotube composite strain sensors. Journal of Intelligent Material Systems and Structures19: 747–749.
5.
TanHJiangLYHuangYLiuBHwangKC (2007) The effect of van der Waals-based interface cohesive law on carbon nanotube-reinforced composite materials. Composite Science and Technology67: 2941–2946.
