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Fig. 1 | Nanoscale Research Letters

Fig. 1

From: Study on adsorption and desorption of ammonia on graphene

Fig. 1

The structure of the gas sensor and a series performance tests. a Gas detection device and graphene-FET sensing device. A graphene sheet bridges the source and the drain electrodes, which closes the circuit. b Raman spectrum of the graphene transferred from highly oriented pyrolytic graphite, indicating that the transferred graphene is a single layer and the graphene layer is not damaged during the transfer (no D peak). a.u. arbitrary units. c IV g curve (with V ds  = 0.05 V) in air (red line) and in vacuum after 20-h vacuum treatment (black line)

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