Chemiresistive Polymer Percolation Network Gas Sensor Created with a Nanosphere Template

The sensitivity and limits of detection (LOD) chemiresistive gas sensors can often be improved by increasing the surface area sensing material that interacts with analyte. This process is referred to as nanostructuring. Nanostructured polypyrrole (PPy) for ammonia were created aid a nanosphere template. Polystyrene nanospheres are deposited form template between interdigitated electrodes, chronoamperometry then used grow PPy electrodes within gaps nanospheres. growth controlled create electrical percolation networks. After removal dissolving them, behavior response nanostructured investigated. show higher lower LOD than networks prepared without templates. An optimal sensor 2.59 ± 0.20% ppm−1 71 6 ppb obtained.