Gas sensing performance of as-produced CNWs. (a) SEM image of CNWs bridging two neighboring Au fingers of an interdigitated electrode. Gases are detected by measuring the change in the device current while applying a constant dc bias to the device. (b) Room-temperature sensing response for NO2 and NH3.
Yu et al. Nanoscale Research Letters 2011 6:202 doi:10.1186/1556-276X-6-202