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

Abstract

The present study demonstrates, chemi-resistive breath monitoring over the solution blended flame retardant, electrically conducting and humidity-responsive composite of polyvinyl alcohol (PVA), polyaniline (PANI) and china clay (PVA/PANI/CC). Chemical structure...

Development of Dual-Selective Chemiresistive Sensor for NH3 and NOx at Room Temperature Using MoS2/MoO2 Heterostructures

“…Besides, in a humid atmosphere, the MoS 2 –MoO 2 heterostructure-based sensor response increases, while increasing the relative humidity percentage (Figure b). This is owing to the fact that in a humid environment, water molecules adhere to the surface and undergo dissociation, yielding protons (H + ) and hydroxyl ions (OH – ) . The presence of the hydroxyl group was further confirmed in the FTIR and XPS results.…”

Advancements in Trace and Low Humidity Sensors Technologies Using Nanomaterials: A Review

“…The measurement of the electrical resistance of the sensor is used to establish a correlation with the humidity level, enabling the determination of the relative humidity within the given environment. In order to obtain humidity readings from resistance measurements, it is necessary to calibrate the sensor by utilizing established humidity levels. ,,, Resistive humidity sensors possess several advantageous characteristics, such as cost-effectiveness, minimal power consumption, commendable linearity, and reliability across diverse environmental conditions. They are commonly used in applications where moderate accuracy is sufficient, such as home weather stations, indoor climate control systems, and some industrial applications.…”