“…Natural rubber was used as it is somewhat elastic and rigid. The sensor was made to monitor the bending of a finger joint in robots [ 253 ]. Ramesan et al synthesized a novel PPy/Ag–NiO nanocomposite using the in situ polymerization method to be used as a sensor for the identification of ammonia gas, and the best results were obtained with 10 wt% of Ag–NiO [ 254 ].…”