“…Hence, highly porous cellulose paper could be better alternative to the ceramic based substrates. Paper is readily available, which has several advantages, including low-cost, lightweight, chemically stable, high porosity, flexible, easy installation and handling [37,38].On the other hand, application of thin film on paper substrate using doctor blade technique is rather simple and inexpensive process, which is suitable for large scale production [39,40]. Given the flexibility and porosity of paper and good humidity sensing capabilities of PANI with facile processing process could be a potential material for wearable electronics.…”