Carbon Nanotube Four-Terminal Devices for Pressure Sensing Applications

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Dinh, T
Nguyen, TK
Phan, HP
Tran, CD
Dau, V
Nguyen, NT
Dao, DV
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2019
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Gold Coast, Australia
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Abstract

Carbon nanotubes (CNTs) are of high interest for sensing applications, owing to their superior mechanical strength, high Young’s modulus and low density. In this work, we report on a facile approach for the fabrication of carbon nanotube devices using a four terminal configuration. Oriented carbon nanotube films were pulled out from a CNT forest wafer and then twisted into a yarn. Both the CNT film and yarn were arranged on elastomer membranes/diaphragms which were arranged on a laser cut acrylic frame to form pressure sensors. The sensors were calibrated using a precisely controlled pressure system, showing a large change of the output voltage of approximately 50 mV at a constant supply current of 100 µA and under a low applied pressure of 15 mbar. The results indicate the high potential of using CNT films and yarns for pressure sensing applications.

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Smart Innovation, Systems and Technologies
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130
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Functional materials
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