For my thesis project I was wondering can CNT provide beter piezoresistive effect than graphite and what would be the features (MWCNT, SWCNT: diameter, purity etc.) for sensitive piezoresistive sensor? Thank you.
The use of cnt for piezoresistive strain sensors due to its unique electromechanical properties. Carbon nanotubes undergo changes in their band structures when subjected to mechanical deformations. This phenomenon makes them applicable for strain sensing applications . The electrical resistivities of carbon nanotube thin film increase linearly with strain, making it an ideal material for a piezoresistive strain sensor. Carbon nanotube composite films, which are usually fabricated by mixing small amounts of single-walled or multiwalled carbon nanotubes with selected polymers, have shown promising characteristics of piezoresistive strain sensors
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