Contemporary Advances in Humidity Sensing Materials, Methods, and Performances

Chemiresistive sensor for breath frequency and ammonia concentration in exhaled gas over a PVA/PANI/CC composite film

“…16,17 The basic strategy for humidity sensing is monitoring surface induced properties of materials such as resistance, optical permeability, and mechanical. 18 The surface interaction of humidity also generates voltage and current to use the materials as self-fueled materials as well as in the form of hydroelectric cell to generates energy. [19][20][21] For this purpose, several polymers, non-polymers, nano structure materials and their composite humidity sensing materials are explored with limited features like processability, selectivity, and sensing parameters.…”