Enhanced Sensitivity of a Gas Sensor Incorporating Single-Walled Carbon Nanotube–Polypyrrole Nanocomposites

A nanocomposite of polypyrrole/carbon nanotubes prepared by in situ chemical polymerization shows improved conductivity of the polypyrrole as compared with its pure form. Its application as a chemical sensor, made using a simple spin‐casting technique, shows a drastically increased sensitivity. The Figure shows a field‐emission scanning electron microscopy (FE‐SEM) image of the SWNT/Ppy nanocomposite.