Ultrasensitive and Selective Nitrogen Dioxide Sensor
Based on Self-Assembled Graphene/Polymer Composite Nanofibers
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Abstract
Reduced graphene oxide (rGO) sheets
were self-assembled onto the
surfaces of electrospun polymer nanofibers to form an ultrathin coating.
These rGO/polymer composite nanofibers were used to fabricate nitrogen
dioxide (NO<sub>2</sub>) sensor. This sensor can be performed at room
temperature, and it exhibited a high sensitivity of 1.03 ppm<sup>β1</sup> with excellent selectivity and good reversibility. Furthermore,
the limit of detection was experimentally measured to be as low as
150 ppb, and this value is much lower than the threshold exposure
limit proposed by American Conference of Governmental Industrial Hygienists
(200 ppb)