4 results about "Chemiresistor" patented technology

The invention provides a chemical resistance type sensor gas category discrimination method and device based on real-time noise, and the method comprises the steps: obtaining an original response analog signal outputted by a chemical resistance type sensor, and converting the original response analog signal into an original response digital signal; acquiring a real-time time-domain signal to be analyzed through a time sliding window with a fixed length based on the original response digital signal, determining a real-time frequency-domain signal to be analyzed based on the real-time time-domain signal to be analyzed, and respectively extracting real-time time-domain noise features and real-time frequency-domain noise features; generating a multi-dimensional noise feature vector based on the real-time time domain noise feature and the real-time frequency domain noise feature; wherein the multi-dimensional noise feature vector comprises 1 / f slope, maximum energy frequency band and signal mean square error feature information; and inputting the multi-dimensional noise feature vector into a trained gas category discrimination model to obtain a gas category discrimination result corresponding to the real-time time domain signal to be analyzed. According to the invention, the complexity and cost of gas type identification of the MOS gas sensor are reduced.

To provide a high-sensitive chemiresistor sensor using carbon black as a filler.SOLUTION: A resin composition for chemiresistor sensors is provided, comprising a resin (A) and carbon black (B) featuring a DBP oil absorption of 300 ml / 100 g or less.SELECTED DRAWING: None

Nanoparticle-fibrous membrane composites are provided as tunable interfacial scaffolds for flexible chemical sensors and biosensors by assembling gold nanoparticles (Au NPs) in a fibrous membrane. The gold nanoparticles are functionalized with organic, polymeric and / or biological molecules. The fibrous membranes may include different filter papers, with one example featuring a multilayered fibrous membrane consisting of a cellulose nanofiber (CN) top layer, an electrospun polyacrylonitrile (PAN) nanofibrous midlayer (or alternate material), and a non-woven polyethylene terephthalate (PET) fibrous support layer, with the nanoparticles provided on the fibrous membranes through interparticle molecular / polymeric linkages and nanoparticle-nanofibrous interactions. Molecular linkers may be employed to tune hydrogen bonding and electrostatic and / or hydrophobic / hydrophilic interactions to provide sensor specificity to gases or liquids. The sensors act as chemiresistor-type sensors. A preferred implementation is a sweat sensor.

A method for manufacturing oxidized MXene according to a preferred embodiment may remove fluorine groups (F) on a surface of MXene and form OH functional groups through an oxidation process to effectively adsorb CO2 molecules and reversibly change electrical conductance according to gas concentration. In addition, a chemimemristor device based on the oxidized MXene (Mn+1Xn(OH)2) may simultaneously implement memristor and gas sensor functions in a single device, and maintain multiple levels of conductance depending on the concentration of adsorbed molecules, and implement, based thereon, reversible changes in conductance according to a concentration of CO2 and multi-level information processing through its characteristics of learning multi-level operations and molecular adsorption history to mimic the human sense of smell and synaptic plasticity of the brain.