7 results about "Chemiresistor" patented technology

The present invention provides a facile heteroepitaxial method for growing conductive zinc-catecholate frameworks on bio-fibers with biomimetic connections, which is beneficial to fabricate biocompatible and high-performance photodetectors and chemiresistors, and the corresponding bio-fiber based metal-organic framework. In this method, a conductive layer is first introduced on the surface of polysaccharide bio-fibers, before well-aligned zinc oxide nanoarrays were densely constructed on the bio-fibers by a physiological coagulation mechanism. The obtained fibrous materials may be used in devices, including in electronic components, having the advantages of good stability, environmental-friendly, flame retardancy, and high response.

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.

The present invention introduces a groundbreaking technology for precise and real-time monitoring of engine / transmission oil, revolutionizing the automotive industry's maintenance practices. Utilizing an optional array of sensors, including Turbidity, Magnet Inductance, Conductivity, Permittivity, Chemiresistors, and ChemFETs, the system continuously assesses the oil's state, providing users with invaluable insights into its health and condition. By eliminating guesswork and manufacturer-recommended schedules, the invention empowers users to make informed decisions about oil changes, extending engine / transmission lifespan and optimizing operational lubricity.The technology's key benefits include improved gas mileage, cost savings on fuel, and enhanced protection against premature power train failure. The invention also offers a unique advantage by recording and graphing changes in oil lubricity between oil changes, aiding in the early detection of engine / transmission problems. Moreover, the incorporation of chemical sensors allows the detection of newly created breakdown chemicals, unburned petrol, and antifreeze accumulation, further safeguarding against potential issues and expensive parts failures.The system's implementation includes a user-friendly dipstick embodiment, featuring an electronic enclosure housing sensors and a microcontroller. Upon reinsertion into the dipstick tube, the dipstick performs a series of tests to determine oil level and clarity, storing baseline measurements in nonvolatile memory. A low-power Bluetooth module enables seamless data transmission to the user's cell phone app, providing access to recorded test results, graphs, and timely oil status alerts.Additionally, an advanced version of the technology contemplates continuous oil sampling during vehicle operation through a “test sample isolation chamber.” This innovative concept allows for comprehensive monitoring of the engine / transmission oil, offering a comprehensive analysis of the oil's health in real-world conditions.In conclusion, the present invention represents a game-changing advancement in automotive maintenance, offering unparalleled accuracy, improved engine / transmission health, and cost-effective oil management. By integrating cutting-edge sensors and intelligent data processing, this technology empowers users to make data-driven decisions, ensuring optimal engine / transmission performance and prolonging the lifespan of these vital systems.

The present disclosure concerns gas sensor and gas sensor arrays and their methods of fabrication. The gas sensor array comprises a chemiresistor array, each chemiresistor comprising a sensing material; a space adjacent to the sensing material in each chemiresistor, the space for providing the VOC to the sensing material; and electronic means in electrical communication with the chemiresistors in order to detect a change in an electrical property of the sensing material upon exposure to the VOC. Each of the sensing material independently comprises a plant extract, each of the plant extract comprises a plant sensory compound at a concentration of about 1 ng / cm3 to about 100 μg / cm3; and each of the plant extract is electrically resistive, the electrical resistance is configured to change in response to the VOC in the space. The present disclosure also concerns methods of extracting biomolecules from a plant sample.

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.