Journal
NANO LETTERS
Volume 3, Issue 5, Pages 639-641Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl025941j
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Carbon nanotube field-effect transistors often exhibit a hysteresis effect in the gate-voltage dependence. We report devices fabricated with small hysteresis, and demonstrate a method to introduce this effect controllably by coating nanotube devices with charged polymers. In addition, the hysteresis is sensitive to humidity on sub-second time scales, showing promise as a humidity sensor. The polymer charge is related to the threshold shift observed, proving that the induced hysteresis results from ionic motion.
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