Nanostructured Tin Oxide Sensors Based on Nanofibers and Nanowires for Detection of Low NO 2 concentration

The responses of nanostructured one-dimensional (1D) tin oxide NO 2 sensors at low temperatures have been compared. The structures studied were nanofibers (NFs) and nanowires (NWs). The sensors were used for NO 2 low concentration detection. NFs and NWs were grown onto micromachined silicon substrates by electrospinning and low-pressure chemical vapour deposition (LPCVD), respectively. Morphological characteristics of the 1D nanostructures are investigated by scanning electron microscopy (SEM) and the sensing properties of the sensors are assessed and compared.