A single-walled carbon-nanotube-array-based (SWCNT) strain sensor was proposed and its fabrication technique was presented, which afforded more simple process than individual SWCNT-based sensor. A novel selective treatment of strain-based electrical breakdown was utilized to leave the SGS-SWCNTs with high gauge factor in the array. The SWCNT-array strain sensor were used for weighing experiment and the results showed that the sensor's output was basically linear. It also showed that the sensor had relatively higher sensitivity (GF≈20) and lower power consumption (tens of nanoWatts) than metal strain-gauge, which had potential applications in high sensitivity strain, weighing or pressure sensors.

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