12results about How to "Improve Sensing Performance" patented technology

The present application relates to a kind of based on carbonized wood natural structure dopamine electrochemical sensor and its preparation method and application, the working electrode of the electrochemical sensor is modified with carbonized wood-ZnO nanowire-ZIF-8.The electrochemical sensor of the present application uses carbonized wood as substrate, after cutting carbonized wood whole piece, using conductive carbon paste is pasted on working electrode, while ensuring conductivity, also retain the three-dimensional structure of nanomaterial not be destroyed, guarantee the performance of sensor, with good application prospect.

This invention discloses a method for preparing a self-healing hydrogel with both sensing and antibacterial properties. The invention uses a hydrogel prepared from acrylamide (AM) and 2-(methacryloyloxy)ethyl dimethyl-(3-sulfopropyl)ammonium hydroxide (SBMA) and cellulose nanofibers (CNF) as a matrix, silver-coated polydopamine nanoparticles (Ag@PDA NPs) as antibacterial and conductive agents, and 2-hydroxy-4'-(2-hydroxyethoxy)-2-methylphenylacetone (I2959) and polyethylene glycol diacrylate (PEGDA) as photoinitiators and crosslinking agents. A multifunctional hydrogel with multiple dynamic reversible bonds is prepared by ultraviolet light-initiated self-polymerization. By constructing various dynamic reversible interactions, including covalent and non-covalent bonds and interionic interactions, a self-healing Ag@PDA NPs / AM / SBMA / CNF hydrogel was obtained. Ag and DA were introduced to prepare Ag@PDA with antibacterial, adhesive, and electronic conductivity properties, while zwitterionic SBMA was introduced to provide ionic conductivity. The synergistic effect of these two compounds endows the hydrogel with electrical conductivity. The hydrogel dressing prepared by this method can achieve rapid sterilization while possessing excellent biocompatibility, high adhesion, high conductivity sensing ability, and environmental adaptability.

The application discloses a kind of Ni doped nano SnO2 semiconductor HCHO sensing materials and preparation method and application thereof, and the preparation method of sensing material includes the following steps: step one, Sn salt-Ni salt solution is configured;Step two, using supercritical hydrothermal synthesis (CSHS) reaction device, Sn salt-Ni salt solution is contacted with supercritical water and crystallization is generated nano doped oxide, and reaction liquid is discharged and collected after cooling, and the crystalline material is separated, i.e. the Ni doped nano SnO2 semiconductor HCHO sensing material of the application.The Ni doped nano SnO2 semiconductor HCHO sensing material prepared by the method of the application has good structural consistency and excellent sensing performance.

The present application relates to a kind of preparation methods of coating material, more particularly to a kind of preparation method of porous polyethyleneimine-silver nanocluster / chitosan / silica coating material.The purpose of the present application is to overcome the problem that the sensing of existing metal nanocluster composite nanoparticles after silica coating is poor, and the application in fluorescence sensing is limited.The present application provides a kind of preparation method of porous polyethyleneimine-silver nanocluster / chitosan / silica coating material, which includes etching the prepared porous polyethyleneimine-silver nanocluster / chitosan / silica coated nanoparticles, making it loose and porous, and enhancing its sensing ability, thereby solving the problem that the sensing of existing metal nanocluster composite nanoparticles after silica coating is poor, and the application in fluorescence sensing is limited.

The electronic device of the present invention comprises: a display module; and a digital converter disposed below the display module, and including a folding portion folded about a folding axis extending in a first direction, and a first non-folding portion and a second non-folding portion spaced apart from each other with the folding portion therebetween in a second direction crossing the first direction. The digital converter includes a plurality of sensing coils, different sensing coils among the plurality of sensing coils are shared by a common line, and the common line is disposed at least in the folded portion.

This invention belongs to the field of electronic component technology, and discloses a SnTe material for a nitrogen dioxide gas sensor, its preparation process, and its application. The SnTe material is synthesized via a solvothermal method. The nitrogen dioxide gas sensor mainly consists of a gas-sensitive material and gold interdigitated electrodes. The gas-sensitive material is coated on the surface of the gold interdigitated electrodes with a coating thickness of approximately 15mm to 75mm. The gas-sensitive material is SnTe. This invention provides a simple, low-cost, safe, and controllable TMDC nanomaterial preparation scheme. Using ethanolamine as a solvent and coordinating agent, and potassium hydroxide aqueous solution as a tellurium source activator, this invention synthesizes SnTe nanomaterials in one step via a solvothermal method. The SnTe nanomaterials prepared by this invention achieve a small nanoscale size. A large number of small-sized nanomaterials can effectively increase the sufficient contact between the material and gas molecules, improving the residence rate of gas molecules on the nanomaterial surface.

The application discloses a quantum sensor chip packaging structure capable of realizing wafer-level planar co-packaging, which comprises a microfabricated atomic cell, a light source chip assembly and a light detection chip assembly, the microfabricated atomic cell is integrated with a reflecting element, the reflecting element is used for adjusting the optical path of the light beam entering the microfabricated atomic cell, the microfabricated atomic cell, the light source chip assembly and the light detection chip assembly are supported on a packaging substrate through a micro-bump assembly and are directly electrically interconnected with the packaging substrate through the micro-bump assembly, the micro-bump assembly comprises a plurality of micro-bumps, the distribution mode of the micro-bumps is for the purpose of realizing the supporting function and the electrical interconnection, the size of the micro-bump supporting the microfabricated atomic cell, the light source chip assembly and / or the light detection chip assembly is adjustable, the optical path of the microfabricated atomic cell is regulated by adopting the combination of micro-bumps with different sizes, and the planar co-packaging of the microfabricated atomic cell and other key quantum sensor components can be realized.

This invention discloses a Ti3C2T x / TiO2 / CuO nanocomposite material and a gas sensor based thereon, the nanocomposite material being a multilayer Ti3C2T obtained by etching x The composite material prepared by this invention is prepared by a hydrothermal reaction of a mixed solution of powder and copper acetate. The composite material possesses gas-sensitive properties, based on the constructed Ti3C2T... x The TiO2 / CuO gas sensor features fast response, high sensitivity, good stability, good selectivity, and low detection limit, enabling accurate and rapid detection of ethanol gas.

The invention provides a stannic oxide / nitrogen-doped carbon composite material, a preparation method thereof and application of the stannic oxide / nitrogen-doped carbon composite material in an acetone sensor, and belongs to the technical field of gas-sensitive materials. The composite material is of a porous honeycomb structure in which tin dioxide nanoparticles are dispersed and embedded into a nitrogen-doped carbon matrix, and an X-ray diffraction crystal face is a tin dioxide rutile structure crystal face; wherein the molar ratio of the stannic oxide nano particles to the nitrogen-doped carbon matrix is (0.5-1.5): (1-3). When the tin dioxide / nitrogen-doped carbon composite material provided by the invention is applied to a gas sensor, the tin dioxide / nitrogen-doped carbon composite material shows excellent sensing performance, good selectivity and sensitivity to acetone gas, has excellent repeatability, can be used as an ultra-sensitive sensing platform for real-time detection of diabetes biomarkers in exhaled gas, and has good application prospects. And the kit has huge potential in the aspects of early diagnosis and screening of diabetes mellitus.

This invention discloses a walnut-shaped In2O3 / CuO material, its preparation method, and its applications, comprising the following steps: Step 1: solvothermal synthesis of a bimetallic coordination polymer precursor; Step 2: controllable pyrolysis of the precursor to convert it into a target oxide composite material; This invention addresses the difficulty of synergistic regulation of heterostructures and oxygen vacancies in existing methods by proposing a one-step solvothermal-programmed pyrolysis method to prepare a walnut-shaped In2O3 / CuO heterojunction composite material with a three-dimensional hierarchical porous structure and controllable oxygen vacancies, thereby achieving simultaneous optimization of material structure, composition, and defects to improve low-temperature Cl2 sensing performance.

The invention discloses a three-gradient microstructure flexible pressure sensor and a preparation method and application thereof, and aims to provide a sensor which is clear in structural design and can realize wide linear range, high sensitivity and high stability, a preparation method of the sensor, and application of the sensor in micro-pressure signal detection and plant physiological monitoring. The sensor comprises a sensing layer, an electrode layer and a hollow supporting layer, the sensing layer comprises an elastomer substrate with a three-gradient microstructure and a conductive film layer covering the surface of the three-gradient microstructure; the elastomer substrate is prepared by the following steps: spin-coating a flexible precursor solution on the surface of a mold, carrying out vacuum defoaming, heating and curing, and stripping to obtain the elastomer substrate with a three-gradient convex structure; the flexible precursor solution is composed of a polydimethylsiloxane solution and a single-layer MXene dispersion liquid; and the mass content of the MXene in the elastomer solid matrix is 2.5%-8%. The sensor is excellent in comprehensive sensing performance and has high stability and reliability.

The application discloses an extended gate field effect transistor electrochemical sensor test system and application, and the system comprises an electrochemical workstation, a field effect transistor MOSFET, an adjustable voltage stabilizing power supply, a BDD electrode, a platinum sheet electrode and a 3D printing reaction cavity; the drain and the source of the field effect transistor MOSFET are connected with the positive and negative poles of the electrochemical workstation respectively; the gate of the field effect transistor MOSFET is connected with a two-electrode system through a wire; the two-electrode system is composed of the BDD electrode and the platinum sheet electrode; the two-electrode system takes the adjustable voltage stabilizing power supply as an input voltage source; and the BDD electrode and the platinum sheet electrode are placed in the 3D printing reaction cavity during work. The application takes the BDD electrode as an extended material of the gate, combines the EGFET prepared by the field effect transistor, and forms the EGFET electrochemical sensor together with the platinum counter electrode and the 3D printing reaction cavity, so that the measurement of low-concentration organic pollutants in water bodies can be realized, and core sensors and technical supports are provided for tap water quality safety monitoring.