Measurements on room temperature gas sensing properties of CSA doped polyaniline–ZnO nanocomposites

In this paper, we report on the performance of an ammonia gas (NH3) sensor based on camphor sulfonic acid doped polyaniline–zinc oxide nanocomposites fabricated by a simple spin coating technique. The nanocomposite showed the sensitivity to ammonia gas (NH3) at room temperature (300 K). Maximum response up to 28.11% was achieved for 100 ppm NH3. Depending on the concentration of NH3, the response time was ranged between 22 and 66 s, whereas the recovery time was 256–418 s.

Graphical abstractSchematic of room temperature gas sensor unit.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Development of CSA doped PANi–ZnO nanocomposites based room temperature NH3 sensor. ► The maximum gas response of 28.11% was achieved upon exposure to 100 ppm NH3. ► Morphological analysis using SEM of the CSA doped PANi–ZnO nanocomposite revealed formation of a diffusion free surface.