Interdigitated electrodes and fabricated gas sensor. (a) The interdigitated electrodes. (b) An optical image of the fabricated gas sensor. Inset is a SEM image of C-SWCNT after drying across the electrode on a bare surface. Detection of a CO and NH3 gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes.
Dong et al. Nanoscale Research Letters 2013 8:12 doi:10.1186/1556-276X-8-12