Drop-cast thin films of multi-walled carbon nanotubes are used as gas sensors in a four-probe measurement setup. The novelty of the approach is that the sensor information is extracted from the noise of the dc resistance data using Fluctuation Enhanced Sensing (FES). We investigate the effects of measurement duration, gate voltage and frequency window on the chemical selectivity of the MWCNT-FES sensor. The selectivity of the device is superior to those of conventional gas sensors, and preliminary experiments indicate that it may also be possible to extract quantitative information from the noise.
|Number of pages||5|
|Journal||Physica Status Solidi (C) Current Topics in Solid State Physics|
|Publication status||Published - máj. 27 2010|
|Event||23rd International Conference on Amorphous and Nanocrystalline Semiconductors, ICANS23 - Utrecht, Netherlands|
Duration: aug. 23 2009 → aug. 28 2009
ASJC Scopus subject areas
- Condensed Matter Physics