Conducting absorbent composite for parallel plate chemicapacitive microsensors with improved selectivity

Metal-Organic Framework MOF-76(Nd): Synthesis, Characterization, and Study of Hydrogen Storage and Humidity Sensing

“…Hydrogen, carbon dioxide, and methane can easily be captured by different type of MOFs due to their ordered porous composition. Pore volume is an important factor to calculate the upper limit of physical gas storage (Almáši et al, 2014;Blanita et al, 2014;Mlsna et al, 2015;Heitzer et al, 2016).…”

Swelling of PDMS networks in solvent vapours; applications for passive RFID wireless sensors

“…Polymer-based capacitor sensors detect organic vapours through the absorption of vapour by the polymer, which results in variation of the polymer's permittivity leading to an overall change in capacitance of the sensor. 21 However, the variance in the polymer's permittivity can be extremely subtle which has led to either the addition of highly conductive additives to PDMS 22 or to measure the change in both permittivity (dielectric) and deformation of the polymer to increase sensitivity. 23 We present a simple, low cost, wireless RFID sensor design that does not rely on capacitance variance, but takes advantage of the large physical deformation of PDMS elastomers when exposed to vapours using a displacement sensor design.…”

Multivariable Sensors for Ubiquitous Monitoring of Gases in the Era of Internet of Things and Industrial Internet

“…In this section, several diverse types of materials are analyzed to illustrate the power of multivariable sensing using electrical nonresonant and resonant impedance sensors. The mo st st udi ed se nsin g mat eri als in clude di el ectric 198,201,202,205,215,220,234 and conjugated 192,195,204,235−237 polymers, macrocycles, 215,238 metal oxides, 182,206,239−241 carbon allotropes, 242,243 and ligand-capped metal nanoparticles. 178,192,201,207,244 Less-explored materials are transition metal dichalcogenide monolayers MX 2 , with M being a transition metal atom (e.g., Mo, W) and X being a chalcogen atom (e.g., S, Se, Te).…”