Humidity sensor based on reduced graphene oxide/lignosulfonate composite thin-film

Electrostatic self-assembly enabled flexible paper-based humidity sensor with high sensitivity and superior durability

“…The mass hydroxyl groups on cellulose chains interact with each other, forming dense hydrogen bonding networks, which result in the insolubility of cellulose in most solvents including water [23] , [50] . In terms of conductive fillers, carbon-based materials are promising candidates owing to their high conductivity, electrical sensitivity, and stability [51] , [52] , [53] , [54] , [55] , [56] . As typical carbon-based materials, carbon nanotubes (CNTs) offer good humidity sensitivity given their p-type semiconductor properties, high aspect ratio, nanoscale hollow structure, and excellent mechanical properties [57] , [58] , [59] , [60] .…”

Research Progress of Graphene-Based Flexible Humidity Sensor

“…So, it can absorb a large number of water molecules and, with an increase in humidity, it will agglomerate into a water molecular film using the interaction between water molecules and GO materials. Due to the principle and the change in structure after the action, GO is an outstanding humidity-sensitive material that is used in humidity sensors [ 8 , 23 , 24 , 25 , 26 , 27 ].…”

Organic Thin‐Film Capacitive and Resistive Humidity Sensors: A Focus Review

“…Besides the CNTs, graphene and graphene oxide are also widely investigated as potential materials for humidity sensors. As far as the graphene is concerned, Chen et al investigated a novel resistant‐type humidity sensor based on reduced graphene oxide (rGO) and its composite with lignosulfonate (LS). The rGO/LS thin film–based sensor with multilayered assembly has been made‐up through a one‐step method, employing LS as the moisture‐sensing layers and rGO as resistant transduction layers.…”