Optical Humidity Sensing Characteristics of Ag-Polyaniline Nanocomposite

A Humidity Sensor Based on Silver Nanoparticles Thin Film Prepared by Electrostatic Spray Deposition Process

“…Existing humidity sensing methodologies also rely upon optical, gravimetric, capacitive, resistive, piezoresistive, and magnetoelastic properties of selected materials [3]. Recently, it is reported that the use of nanostructures, such as nanoparticles, nanowire, nanotubes, and polymer nanocomposites, as the humidity sensing materials could enhance the performance of humidity sensors greatly [4][5][6][7][8]. For these nanostructured materials, the surface effect becomes dominant due to their large surface-to-volume ratio, which is beneficial to construct the humidity sensors and the gas sensors [9].…”

KCl-Modified Dy2O3 Nanospheres with Humidity Response for Human Respiration Monitoring

“…As a bridge and link between the real world and the digital system, the sensor has aroused great interest of researchers in the past period because of its unique, excellent performance and broad application prospects. − With the development of science and technology, intelligent devices have brought great changes to our lives. Because water plays a very important role in daily life and production, the preparation of smart wearable devices using water molecules as signal sources has become a topic concerned by many researchers. − The humidity sensor (resistive, microwave, infrared, light intensity, and quartz-crystal microbalance sensors − ) which converts the concentration of adsorbed water vapor into environmental humidity electrical signals has become a research hotspot in the field of sensors. It has been widely used in automobile, pharmaceutical, food, production, meteorology, environmental monitoring, and more and more intelligence fields. − In recent investigations, ,,− researchers have devoted efforts to develop devices for real-time monitoring of human respiration, atmospheric humidity monitoring, and intelligent ranging, which are used to warn people by monitoring the relative humidity of the surrounding environment.…”

Single dielectric columnar thin film as a humidity sensor

“…An artificial TiO 2 columnar array with a columnar diameter that varies periodically along the normal to its substrate acts as an optical rugate filter, and its transmission spectrum changes with humidity, which relationship can be exploited in a humidity sensor [2,3]. The Ag-polyaniline nanocomposite multilayer has a large surface area to volume ratio, enabling it to physisorb water molecules to an extent that varies with the relative humidity [4]. The nanostructures that were previously used for vapor sensors were regarded as complex multilayer-structures.…”