139 results about "Graphene electrode" patented technology

The object of the present invention is to provide a flexible OECT non-enzymatic glucose sensor and a preparation method thereof, belonging to the technical field of glucose electrochemical sensors. The sensor uses a chemically modified laser-induced graphene (LIG) electrode as the gate, and gold nanoclusters (AuNC) are modified on the LIG through controllable in-situ electrochemical reduction; at the same time, by utilizing the pH-dependent conductivity of PEDOT:PSS, the self-calibration of the sensor of the present invention to the pH change of human sweat is realized, thereby reducing interference and improving the measurement accuracy. The flexible non-enzymatic glucose sensor designed by the present invention has the advantages of high detection sensitivity, low detection limit, excellent long-term stability, and being unaffected by pH value fluctuations, and can be widely applied to the field of wearable electronics.

The invention relates to the technical field of film strain, in particular to a preparation and installation method of a film strain sensor and a harmonic reducer. The preparation and installation method comprises the steps that the surface of a workpiece to be installed is coated with a polyamide acid solution, then heating is conducted, and polyamide acid is subjected to dehydration cyclization to form a polyimide film attached to the surface of the workpiece to be installed; and then, forming a laser-induced graphene electrode pattern on the polyimide film. The harmonic reducer comprises a wave generator, a rigid gear, a flexible gear and a thin film strain sensor, the flexible gear is connected into the rigid gear in a toothed mode, and the wave generator is arranged in the flexible gear; the film strain sensor comprises a strain film and a graphene electrode, the graphene electrode is formed on the strain film, and the strain film is in direct contact connection with the surface of the flexible gear. Through the film strain sensor adhered to the surface of the workpiece to be installed, in-situ torque detection can be achieved, measurement errors, hysteresis, instability and the like caused by a glue joint layer are avoided, and measurement is more accurate.

The invention relates to the technical field of microelectronic devices, in particular to a single-molecule memristor-rectifier device based on supramolecular assembly and a preparation method thereof. According to the preparation method, the guest molecule B is covalently connected with the tail end of the graphene electrode pair, so that stable and tight interface bonding between the supramolecular functional molecule and the electrode can be ensured; and then soaking the graphene electrode pair connected with the guest molecule B in a solution containing the host molecule A and the guest molecule C to form a supramolecular functional molecule between the graphene electrode pair. The guest molecule C in the supramolecular functional molecule has intrinsic oxidation-reduction activity, and the molecular structure of the guest molecule C can generate a reversible electron gain and loss process, so that controllable and reversible adjustment of charge distribution in the molecule is realized. Under the action of an electric field, through the reversible oxidation-reduction reaction of the guest molecule C, significant changes of intramolecular charge distribution and electron transmission characteristics are triggered, and finally reliable switching of high and low resistance states of the device is achieved.

The invention discloses a polarization-sensitive narrow-band solar blind self-driven photoelectric detector and a preparation method thereof, and belongs to the technical field of semiconductor photoelectric devices. The detector comprises an n-type conductive single Ga2O3 micron wire, a p-type conductive GaN substrate, a PET substrate and a two-dimensional graphene film. According to the device, Ni / Au alloy is selected as a positive electrode, and a two-dimensional graphene film is used as a transparent window of ultraviolet solar blind light and a negative electrode of the device. By means of built-in potential formed by the n-Ga2O3 / p-GaN heterojunction and a Schottky barrier of Ga2O3 / Graphene, high-sensitivity detection of solar-blind ultraviolet light under the self-driving condition is achieved. The device has relatively high responsivity, specific detection rate and external quantum efficiency. The preparation method comprises the following steps: cleaning the GaN substrate, evaporating the Ni / Au electrode, adhering the PET substrate with the channel, transferring the Ga2O3 micron wire to form the heterojunction, and transferring and curing the graphene electrode. The device has the characteristics of polarization sensitivity and low power consumption, and can be applied to the fields of ultraviolet solar blind band encryption communication and environment monitoring.

The invention relates to the technical field of single-molecule devices, in particular to a single-molecule device for detecting small-molecule gas based on supramolecules and a preparation method of the single-molecule device. The monomolecular device comprises a functional molecule and a graphene electrode pair, wherein the functional molecule is connected between the graphene electrode pair through an amido bond. A cucurbituril hydrophobic cavity structure in the functional molecular structural formula can contain and capture target small molecular gas, gas molecules of different volumes are selectively included through multiple weak interaction, a dynamically-adjustable subject-object compound structure is formed, and then switching type sensing detection on the small molecular gas is achieved. The amino terminal of the end part of the main bridging unit in the functional molecule can be connected with the carboxyl terminal of the graphene point electrode in a covalent bond manner, and amide condensation molecular chain connection is formed at the two ends of the graphene point electrode, so that the stability of a monomolecular device is improved. The preparation method provided by the invention is simple in process, mild and controllable in reaction condition and beneficial to large-scale production.

The invention belongs to the technical field of flexible electronics and sensing, and relates to a stepped multi-mode flexible sensor based on laser-induced graphene and a preparation method of the stepped multi-mode flexible sensor. The sensor comprises a humidity sensitive layer, a pressure sensitive layer, a strain sensitive layer and a temperature sensitive layer which are sequentially stacked in a stepped mode from top to bottom, each sensitive layer comprises a flexible substrate, a laser-induced graphene (LIG) electrode and a connecting area penetrating through the flexible substrate, and the sensitive layers are connected in series through the connecting areas. Through an infrared laser processing method, all the sensitive layers are broken through, all the sensing sensitive layers are communicated, and assembling is carried out. And independent sensing of each physical quantity is realized by leading out a corresponding port on each sensing sensitive layer. According to the stepped structure, spatial isolation is carried out through the flexible substrate, signal crosstalk is reduced, low-cost and high-precision manufacturing is achieved in combination with the laser direct writing process, and the stepped structure is suitable for the fields of medical health monitoring, industrial equipment diagnosis, intelligent robots and the like.

The utility model belongs to the technical field of biosensors, and provides a closed-loop control system, which comprises a graphene electrode microneedle sensor, an ultrasonic pump and a control module, the graphene electrode micro-needle sensor comprises a polystyrene micro-needle array, a working electrode and a reference electrode / counter electrode cover the convex surface of a micro-needle body of the polystyrene micro-needle array, and the electrodes comprise the working electrode and the reference electrode / counter electrode which are formed by printing graphene composite ink on the surface of the micro-needle array. The graphene-PB electrode can improve the sensitivity of the microneedle without changing the structural shape of the microneedle, the ultrasonic pump and the microneedle sensor are further integrated, medicine is conveyed through a hollow channel of the microneedle, and the microneedle has the advantages of being stable, wearable, miniaturized, painless, accurate, high in cost benefit, easy to manufacture and the like.

The invention relates to the technical field of single-molecule devices and sensors, in particular to a graphene single-molecule sensing device based on pillararene as well as a preparation method and application of the graphene single-molecule sensing device. The sensor comprises a pillararene molecule, the functional molecule is covalently connected between a graphene electrode pair through nucleophilic substitution reaction or amide condensation reaction under an alkaline condition, and the stability and the conductive reliability of a molecule-electrode interface are enhanced. According to the present invention, the column aromatic hydrocarbon molecules can selectively perform inclusion on the perfluorocarboxylic acid, and the combination of different types of perfluorocarboxylic acids and the column aromatic hydrocarbon molecules can show the difference characteristic of the conductive state so as to achieve the distinguishing of different perfluorocarboxylic acids, such that the method is hopeful to be used in the detection of perfluorocarboxylic acid. Meanwhile, perfluorocarboxylic acid can be effectively desorbed through methanol treatment, and an I-V signal is recovered to an initial state, so that the device has reusability. The preparation method provided by the invention is stable in process, high in repeatability and beneficial to large-scale production.

The invention relates to the field of coal graded conversion and utilization, in particular to a method for preparing a graphene battery electrode from coal tar with low energy consumption. According to the preparation method, coal tar serves as a carbon source, graphene grows on the surface of foam metal in situ at the low temperature of 300-900 DEG C, and a graphene-metal composite substrate is formed and used for synthesizing the self-supporting electrode material; according to the preparation method, continuous production is realized by a set of continuous production system. According to the method, the energy consumption of graphene electrode production is reduced through the process of growing graphene at low temperature through coal tar, the traditional coating step is omitted, a binder and a conductive agent are not needed, and the prepared electrode shows high specific capacity and low charge transfer impedance.

The invention relates to the technical field of lithium battery pole piece processing, and discloses a graphene pole piece processing device for a lithium battery, the graphene pole piece processing device comprises a processing table, the top of the processing table is fixedly connected with a driving mechanism, the surface of the driving mechanism is fixedly connected with a clamping mechanism, and the surface of the clamping mechanism is provided with an operating mechanism; the adjusting assembly comprises a vertical plate, the vertical plate is arranged at the top of the machining table, a hollowed-out seat is fixedly connected to the surface of the vertical plate, a cross-shaped sliding block is slidably connected into the hollowed-out seat, and an L-shaped plate is fixedly connected to the top of the cross-shaped sliding block. According to the graphene pole piece processing device for the lithium battery, through the arranged clamping mechanism, a cross-shaped block and a cross-shaped sliding block drive a friction block to slide in a friction seat through clamping force conduction, pressure is buffered through friction force, the situation that a pole piece is damaged due to instant too large clamping force is avoided, and the integrity and the processing precision of the pole piece in the processing process are fully guaranteed; and the strict requirement of the graphene pole piece of the lithium battery on the processing precision is met.

The invention discloses an infrared detector sensitive element structure, a preparation method and an infrared detector, and is applied to the field of infrared detection.The infrared detector sensitive element structure comprises a first electrode, a pyroelectric functional layer and a second electrode; the pyroelectric functional layer is a polyvinylidene fluoride based copolymer thin film layer, and the polyvinylidene fluoride based copolymer thin film layer directly absorbs infrared light; the first electrode is arranged on the surface of one side of the pyroelectric functional layer, the second electrode is arranged on the surface of the other side of the pyroelectric functional layer, and the surface, provided with the second electrode, of the pyroelectric functional layer is an infrared light incident surface; the second electrode is a single-layer graphene electrode; and the single-layer graphene electrode has permeability to infrared light. The polyvinylidene fluoride-based copolymer film layer is used as a pyroelectric functional layer, and the single-layer graphene electrode is used as an electrode of an infrared light incidence side, so that the thickness of the functional layer can be reduced, and the functional layer is enabled to directly dominate absorption of infrared radiation, thereby reducing the heat capacity of the device, and improving the response sensitivity and response speed of the device.

The invention relates to an HEMT device integrating P-AlGaN and a graphene layer in a drain region and a manufacturing method, and belongs to the field of semiconductor power device manufacturing, the HEMT device sequentially comprises a substrate, a GaN buffer layer, a GaN channel layer and an AlGaN barrier layer from bottom to top, source metal is arranged above the left side of the AlGaN barrier layer, and the graphene layer is arranged above the right side of the AlGaN barrier layer. A p-GaN cap layer is arranged between the source electrode metal and the graphene layer above the AlGaN barrier layer, and grid electrode metal is arranged above the p-GaN cap layer; a plurality of p-AlGaN islands are arranged in the graphene layer, and drain metal is arranged above the graphene layer. According to the invention, through coexistence of PN junction regulation and ohmic contact, the effects of reducing resistance and improving heat dissipation and the like of the graphene electrode are combined, the comprehensive performance of the device is optimized, the breakdown voltage can be effectively improved, the on resistance is reduced, the current collapse is inhibited, and a new thought is provided for preparation of high-performance GaN power and radio frequency devices.

The invention discloses a graphene electrode material of a lead-acid storage battery and a preparation method of the graphene electrode material, and belongs to the technical field of electrode materials. The preparation method is used for solving the technical problem that the conductivity, the specific surface area, the first coulombic efficiency and the first discharge specific capacity of a graphene electrode material of a lead-acid storage battery in the prior art need to be further improved. Comprising the following components in parts by weight: 1000 parts of lead powder, 8-15 parts of barium sulfate, 3-8 parts of modified humic acid, 2.5-4 parts of modified lignin, 3-7 parts of carbon black, 3-10 parts of 3-10 graphene, 5-10 parts of modified graphite, 0.8-1.5 parts of a tin dioxide compound, 0.8-1.2 parts of carbon fibers, 3.5-5 parts of sulfuric acid and 12-15 parts of deionized water. Through the synergistic effect of the substances, the conductivity, the specific surface area, the first coulombic efficiency and the first discharge specific capacity of the electrode material are jointly improved.

The present invention discloses a Ge nanopillar photodetector modified with metal nanoparticles and a method for preparing the same. The device comprises: a bottom electrode; an intrinsic Ge substrate layer covering the bottom electrode; a plurality of Ge nanopillars periodically arranged on the intrinsic Ge substrate layer; metal nanoparticles adsorbed on the surface of the Ge nanopillars; a metal having a work function greater than 4.46 eV; and a graphene electrode covering the plurality of Ge nanopillars and separated from the intrinsic Ge substrate layer by a non-conductive dielectric material. The Ge nanopillar photodetector modified with metal nanoparticles provided by the present invention has low dark current, high photocurrent and high responsivity, and exhibits high detection performance.

Provided are devices and methods for detecting a target molecule, based on using a graphene electrode. The devices exhibit high sensitivity to target molecules such as DNA that may be present at comparatively low concentrations.

The invention discloses a chemical sensing system based on graphene. The system includes a sensor module including a substrate, a plurality of pairs of electrodes disposed over the substrate, and a sensing layer disposed over each pair of electrodes on the substrate to form an array of sensing surfaces. The sensing layer is an integrated surface functionalization mask having an open slot for each sensing surface. Each open slot includes a different polymeric material. The surface functionalization mask enables simultaneous deposition of various polymeric materials to the sensing surface using microarray printing. The sensor module is configured to create sensor data when a chemical compound is presented on the sensing surface and a constant bias is applied on the electrodes, the sensor data having a cross-reaction response characteristic resulting from a temporary change in resistance of the graphene over time. The substrate further includes silicon (Si), thermally grown silicon dioxide (SiO2), and graphene. The electrode comprises a titanium / gold (Ti / Au) interdigital electrode.

The invention relates to the technical field of moisture power generation, in particular to a polyacrylamide cellulose-based hydrogel moisture generator and a preparation method thereof, and the preparation method comprises the following steps: punching zinc to obtain a porous zinc electrode; engraving a polyimide film to obtain a laser-induced graphene electrode; mixing acrylamide, carboxylated cellulose, deionized water and lithium chloride to obtain a mixed solution, and mixing and stirring for 30 minutes; then adding ammonium sulfate and N, N-methylene bisacrylamide; after mixing and stirring for 30 minutes, pouring the obtained solution into a silica gel mold, and putting the silica gel mold into a constant-temperature and constant-humidity box for cross-linking, so as to obtain polyacrylamide cellulose-based hydrogel; the polyacrylamide cellulose-based hydrogel moisture generator comprises a porous zinc electrode layer, a polyacrylamide cellulose-based hydrogel layer and a laser-induced graphene layer which are sequentially connected from top to bottom; the moisture generator disclosed by the invention is good in output performance in a relatively large humidity range, relatively high in current output and relatively lasting in voltage output.

The application discloses a paper-based microfluidic intelligent wound monitoring bandage based on a laser-induced graphene electrode array and a preparation and signal processing method thereof. The bandage comprises a calcium alginate / zinc oxide antibacterial base, a wax-printed paper-based lateral chromatographic microfluidic channel layer, a CO2 laser direct writing LIG multifunctional electrode array, a colorimetric indication area, an NFC wireless communication module and a silver nanowire electrically controlled drug release module. The LIG electrode is fixed and modified by enzymes to detect uric acid, lactic acid, glucose and pH value respectively; the paper-based colorimetric disc detects bacterial protease and TNF-alpha; the NFC radio frequency field provides energy to realize battery-free operation. The built-in signal processing method comprises temperature compensation, cross interference elimination, multi-parameter fusion infection risk scoring and double-threshold closed-loop drug delivery decision. The preparation process mainly uses laser direct writing, screen printing and ion crosslinking, has low material cost and is green and environmentally friendly, and is suitable for closed-loop monitoring and treatment of chronic wounds at home and in clinic.

The present invention provides a graphene electrode material, the structure of which includes a graphene sponge; heteroatoms are doped in the graphene sponge; the preparation method of the graphene electrode material comprises the following steps: 1) using graphene oxide and an alkali metal assistant as raw materials, and obtaining a graphene sponge precursor through freeze-drying; 2) subjecting the graphene sponge precursor to pyrolysis treatment to obtain a three-dimensional porous graphene sponge; the graphene electrode material is used as an electrode material in a capacitive mixing salt gradient energy generation device; the graphene electrode material prepared by the present invention has a multi-aperture structure, high conductivity and a stable structure, which helps to improve the ion transport selectivity, and achieves a high desalination capacity, specific capacitance, output power density and excellent cycle stability.

The invention relates to a graphene-based high-switch-ratio vertical organic transistor and a preparation method thereof, and belongs to the technical field of organic semiconductor devices. The transistor comprises a first metal electrode, a rubrene single-crystal active layer, a second metal electrode, a single-layer graphene electrode, a silicon dioxide dielectric layer and a silicon substrate which are sequentially stacked from top to bottom, wherein the silicon substrate is also used as a grid electrode. The graphene electrode is prepared by a mechanical stripping method, and is transferred to the surface of silicon dioxide at a low temperature of 50-120 DEG C after being pretreated by ozone or plasma to form a porous structure so as to improve the vertical charge injection performance; the rubrene single crystal active layer is deposited through a two-step sublimation method, high crystal quality is obtained through annealing treatment, then the rubrene single crystal active layer is transferred to the surface of the graphene electrode by means of the flexible polymer microneedle, and interface defects are reduced. And finally, respectively depositing metal electrodes with the thickness of 20-80nm above and below the rubrene to construct a vertical organic transistor structure. The device shows excellent switching performance under the condition of low power consumption, the switching ratio is larger than 2.5 * 10 < 6 >, the off-state current density is not larger than 10 [mu] A / cm < 2 >, and the device is suitable for flexible logic devices and neuromorphic calculation application.

The invention relates to the technical field of friction nano-generators, and discloses a large-deformation-resistant flexible friction nano-generator and a preparation method thereof.The large-deformation-resistant flexible friction nano-generator comprises a positive friction layer and a negative friction layer, and a supporting body is arranged between the positive friction layer and the negative friction layer; the conductive copper foil electrode is positioned on one surface, far away from the negative friction layer, of the positive friction layer and is used for leading out charges induced on the positive friction layer side; the protective layer is located on one side of the negative friction layer away from the positive friction layer; the graphene electrode is positioned between the protective layer and the negative friction layer and is used for leading out charges induced on the negative friction layer side; and the graphene electrode is generated in situ by the negative friction layer through infrared laser irradiation. The gradient transition region is generated between the negative friction layer and the graphene electrode through the gradient energy laser, and the Young modulus of the transition region is gradually increased, so that a stress concentration point caused by sudden change of the modulus can be avoided, the device keeps stable interface bonding under repeated stretching and bending, and the structural stability and durability of the generator are further improved.

The invention discloses a megasonically exfoliated two-dimensional (2D) nanomaterial ink. The megasonically exfoliated 2D nanomaterial ink is then aerosol-jet printed (AJP) onto printed graphene electrodes to achieve all-AJP, flexible photodetectors. The 2D nanomaterial AJP ink is designed with terpineol, a high boiling point solvent, which enables a highly ordered thin-film morphology and also improves the photogenerated charge transport. After printing, the photodetectors are photonically annealed, which provides quasi-ohmic contacts and photoactive channels with responsivities that outperform previously reported all-printed visible photodetectors by over 3 orders of magnitude. Megasonic exfoliation coupled with AJP allows the superlative optoelectronic properties of ultrathin nanosheets to be utilized in the scalable additive manufacturing of mechanically flexible optoelectronics.

The present invention discloses a self-powered wireless humidity sensor and its preparation and use methods. The preparation method comprises: A. preparing a carbon-based polymer film; B. laser processing the carbon-based polymer film to obtain a graphene electrode pattern, wherein the graphene electrode pattern includes a humidity sensing region, a tip discharge region, and an energy collection region. The humidity sensing region is used to sense ambient humidity and generate an ambient humidity signal, and the tip discharge region is used to transmit the ambient humidity signal; C. covering the energy collection region with a fluoropolymer film; wherein the fluoropolymer film and the energy collection region are used together to provide electrical energy. This solution uses a laser to customize a circuit pattern on a flexible substrate, utilizes charges generated by triboelectric charging and electrostatic induction to power the sensor, and simultaneously implements wireless sensing based on the tip discharge principle for wireless monitoring of humidity in the environment. The sensor has a simple and reasonable structure, a simple and quick preparation method, and a simple and accurate use method.

The invention discloses a manufacturing method of a flexible wearable fully-integrated sensor with a multilayer structure, and belongs to the technical field of flexible electronic and multi-parameter biosensor manufacturing. The invention aims to solve the problems of weak bonding force between middle layers, poor process compatibility and large cross interference in the prior art. The method comprises the following steps: firstly, preparing a functional composite substrate through a multi-layer spin-coating process, and sequentially forming a polyimide film, a PI / FeCl3 film and a PI / MoS2 film; etching a graphene circuit structure on the surface of the substrate by adopting a carbon dioxide laser ablation technology, forming a conductive circuit through electrochemical deposition of copper and silver, and spin-coating a packaging layer after welding an electronic element; and finally, selectively etching different types of graphene electrode arrays on the specific functional layer by regulating and controlling laser parameters, and constructing humidity, hydrogen peroxide, nitrite, glucose, uric acid and strain sensing units. According to the invention, efficient integration is realized, and the stability, the detection precision and the wearing comfort of the sensor are improved.

The utility model relates to the technical field of electrochemical deposition devices, in particular to a graphene electrode material continuous electrochemical deposition device which comprises an electrolytic tank, a fixing block, a fixing hole, a mounting frame, a mounting block, a positioning groove, a positioning block, a containing groove, a placing filter frame, a stirring assembly, a liquid conveying assembly, a circulating assembly and a liquid discharging assembly. A mounting frame is arranged above the electrolytic tank, a plurality of groups of mounting blocks are arranged on the bottom wall of the mounting frame, the mounting blocks are connected with fixing blocks through fixing holes in a clamping manner, a plurality of groups of accommodating grooves are formed in the mounting frame, a plurality of groups of positioning grooves are formed in the inner walls of the accommodating grooves, and a plurality of groups of positioning grooves are formed in the inner walls of the positioning grooves; a placing filter frame is arranged in the accommodating groove; in the using process of the electrochemical deposition device, due to the fact that the installation frame and the containing filter frame are both in the convenient design of clamping connection, the whole device is easy, convenient and efficient to disassemble and assemble, and the material taking and placing process is easy, convenient and efficient, and the operation convenience and the working efficiency are further improved.

The present invention discloses a phosphonate graphene electrode material and a synthesis method thereof, belonging to the field of inorganic materials and electrode synthesis. (1) chlorinated graphene, phosphite and a solvent are ultrasonically mixed; (2) a catalyst is added and reacted at a temperature of 65-166°C; (3) filtering, washing and drying the filter cake to obtain phosphonate graphene. This method introduces phosphonate esters into graphene sheets, thereby avoiding excessive accumulation of sheets and overcoming defects such as a small specific surface area of ​​graphene. The synthesized phosphonate graphene has good quality and a specific surface area of ​​700 square meters per gram or more. Since the phosphonate groups are introduced into graphene, the types of graphene are broadened. Phosphonate graphene has good electrochemical properties when used as an electrode material for supercapacitors and can be used in flame retardancy, sewage treatment, energy, materials and biomedicine. It can also be used as a drug carrier, etc., and has good application prospects.

A biosensor system comprises a first layer comprising an adhesive layer, a second layer comprising an electrode layer (such as a laser induced graphene (LIG) electrode layer), a third layer comprising a microfluidic layer, and an electronic component. The microfluidic layer comprises reservoirs arranged in an array to chronologically capture and store liquid samples, e.g., sweat samples.

The invention relates to a preparation method of an electrochemical sensor for starch detection, the electrochemical sensor and application, and the method comprises the following steps: patterning the surface of a polyimide film through a laser system to prepare three graphene electrodes; transferring the graphene three-electrode to the surface of the polycaprolactone to obtain a formed polycaprolactone-graphene three-electrode; coating Ag / AgCl silver paste on a reference electrode area in the polycaprolactone-graphene three-electrode, heating and curing, then insulating and packaging outside the three-electrode area, and activating the electrode; the electrochemical sensor for starch detection is obtained by modifying a carbon nanocage, platinum-palladium nanoparticles and glucoamylase layer by layer in a working electrode area. The prepared polycaprolactone degradable electrode can realize environment-friendly detection of starch, the degradable electrode material is soft and bendable, the starch content of various tissue parts of a plant can be detected, and the problems that an existing sensor is difficult to be effectively attached to the plant to be detected and environmental pollution is caused are effectively solved.

The application discloses a kind of laser-induced graphene immune rapid low-cost remote medical detection platform, it is related to biomedical detection technical field, the platform includes following component part: sensor array module: using CO2 laser engraving technology is formed on polyimide substrate and contains 4 graphene working electrode, 1 Ag / AgCl reference electrode and 1 graphene counter electrode patterned structure, through 1-pyrene butyric acid functionalization after specific antibody is fixed and is blocked with bovine serum albumin;The application greatly reduces the detection cost by using laser engraving graphene electrode preparation process, at the same time, by constructing the sensor array module comprising four graphene working electrode, a plurality of antibodies can be specifically fixed, the simultaneous detection of SARS-CoV-2 nucleocapsid protein, spike protein specific IgM / IgG antibody and C-reactive protein and other multiplex biomarkers is realized, sample detection cycle can be controlled within 10 minutes, greatly improve detection efficiency.

The invention discloses a preparation method and application of an in-plane porous hydrophilic graphene electrode. Comprising the following steps: firstly, carrying out surface cleaning and drying on a graphene film; and placing the dried graphene film in a temperature interval of 550-750 DEG C, and carrying out thermal oxidation etching treatment. According to the method, oxygen molecules are utilized to accurately etch graphene crystal lattices, and abundant and size-controllable porous structures and hydrophilic oxygen-containing functional groups are constructed in situ in the film plane direction, so that the in-plane porous and hydrophilic graphene electrode is obtained. The obtained in-plane porous hydrophilic graphene electrode can be applied to the field of electrochemical biosensing, is especially suitable for neurotransmitter dopamine detection, and can effectively improve the sensing performance of dopamine molecules.