Abstract
Patterning oriented reduced graphene oxide (rGO) into functional structures is significant for its application in electronics and sensors. A large array of highly oriented rGO microbelts are prepared by a soft lithography process. These rGO microbelts have a uniform structure that enables the massive production of graphene electronics using a simple mask shielding process. A high performance NH3 sensor array which was fabricated from rGO microbelts exhibits a reproducible performance with the relative resistance response (ΔR/R0) reaching 0.35, whilst offering a large concentration range response of 10 ppm ∼38%, showing these sensors to be both highly sensitive and responsive. The impact of working temperature on the response to NH3 in low and high concentration ranges of NH3 is also discussed.
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