93 results about "Graphene electrode" patented technology

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 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 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 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 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 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 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.

This invention belongs to the field of micro-electromechanical biosensing technology, specifically relating to a flexible sensor for real-time monitoring of gallic acid content in plants, its preparation method, and its application. The flexible sensor includes a flexible substrate and a working electrode, a reference electrode, and a counter electrode disposed on the substrate. The working electrode is a laser-induced graphene electrode (LIG) with its surface sequentially modified with black phosphorus nanosheets (BP), sheet-like titanium carbide (MXene), and manganese phosphorus sulfur (MnPS3). This flexible sensor can achieve online detection and analysis of gallic acid in plant tissues at different stages. Because it is a patch-type adaptive sensor for plant surfaces, it does not cause fundamental damage to the detected material, allowing the material to continue growing until maturity. Furthermore, the layer-by-layer assembly of the working electrode with black phosphorus nanosheets, MXene, and MnPS3 achieves highly sensitive detection of gallic acid, offering advantages such as lightweight portability, excellent electrical performance, and high integration.

According to the graphene-based stem cell electrical stimulation differentiation device provided by the invention, a flexible graphene electrode array is adopted to release micro-current, an in-vivo bioelectric environment is simulated, and directional differentiation of stem cells to osteoblasts is promoted. The device combines electrical stimulation and impedance monitoring functions, can feed back the cell state in real time, and improves the differentiation efficiency. The graphene electrode has excellent biocompatibility, high conductivity and flexibility, and is suitable for long-term cell culture. By integrating the flexible graphene electrode, micro-current stimulation and impedance monitoring technologies, the invention provides an efficient and controllable stem cell differentiation scheme which can be applied to the fields of bone tissue engineering, regenerative medicine, drug screening and the like.

The application discloses a plasmonic-enhanced 4H-SiC MSM ultraviolet photodetector with a super-structured surface and a preparation method thereof. The ultraviolet photodetector comprises a 4H-SiC substrate layer, an N-type buffer layer arranged on the 4H-SiC substrate layer, a lightly-doped N-epitaxial layer arranged on the N-type buffer layer, a super-structured surface structure and a graphene transparent electrode arranged on the lightly-doped N-epitaxial layer, wherein the graphene transparent electrode is an interdigital electrode, the super-structured surface structure is located in the gap of the graphene transparent electrode, and an Al nanostructure is arranged on the top of the super-structured surface structure. The application increases the number of photo-generated electron-hole pairs through the super-structured surface, the graphene electrode and the plasmonic-enhanced light absorption, thereby effectively improving the responsivity and quantum efficiency of the device and improving the application performance of the ultraviolet photodetector.

The invention discloses a multi-physical field regulation graphene electrode preparation method and device and an array device, and relates to the technical field of electrode materials. The multi-physical field regulation and control graphene electrode preparation device comprises a base, a laser generation device, a temperature field device, an ultrasonic generation device, an electric field generation device and a magnetic field generation device, and the temperature field device is used for generating a temperature gradient with the temperature gradually reduced from the upper surface of the temperature field device to the upper part; the electric field generating device is used for generating a pulse electric field in the vertical direction and synchronous with the laser beam frequency, the magnetic field generating device is used for generating a magnetic field orthogonal to the pulse electric field, and the ultrasonic generating device is used for generating ultrasonic waves synchronous with the moving path of the laser beam. Based on a laser-induced graphene technology, the quality and performance of the graphene electrode are improved through multi-physical field regulation and control.

The application relates to a preparation method of a multilayer graphene electrode, and belongs to the technical field of battery materials.The multilayer graphene electrode comprises a carbon base layer, a transition metal layer and a graphene layer, one side surface of the carbon base layer is attached with the transition metal layer, one side surface of the transition metal layer is connected with the carbon base layer, and the other side surface of the transition metal layer is attached with the graphene layer; the graphene layer is deposited through the transition metal layer, the excellent electric conductivity and the high specific surface area of the graphene itself are utilized, and an electrode with excellent electrochemical performance is prepared.

The invention relates to the field of research, development and application of novel semiconductor devices, in particular to a high-performance MoS2 transistor based on an ultrathin gallium oxide dielectric layer and a manufacturing method of the high-performance MoS2 transistor. The transistor is composed of a bottom gallium nitride substrate, a titanium / aluminum / titanium / gold laminated metal electrode in contact with gallium nitride, an ultrathin gallium oxide dielectric layer, a molybdenum disulfide channel, a graphene electrode and a titanium / gold laminated metal electrode, wherein the graphene electrode and the titanium / gold laminated metal electrode are connected with molybdenum disulfide. According to the invention, the ultrathin gallium oxide dielectric layer is prepared on the gallium nitride surface by adopting a low-temperature thermal oxidation process, the ultrathin gallium oxide dielectric layer has high surface quality, and the MoS2 transistor prepared based on the ultrathin gallium oxide dielectric layer shows excellent electrical properties. The work shows the huge application potential of ultrathin gallium oxide in the field of high-quality dielectric layers of two-dimensional materials, and meanwhile, a new thought is provided for the development of low-power-consumption two-dimensional nano electronic devices.

The application relates to the technical field of optoelectronic devices, in particular to a single-molecule spin electronic device based on pulse femtosecond laser regulation and a preparation method. The electronic device takes a laser-induced single-molecule wheel ring porphyrin heteronuclear metal molecule between graphene electrode pairs as a core molecule, and simultaneously selects a lanthanide metal ion with strong spin-orbit coupling characteristics as a coordination center. Electrical test results show that the conductivity of the single-molecule spin electronic device provided by the application is obviously improved after laser irradiation in the low-voltage region and the high-voltage region compared with before the irradiation. Optical test results show that the single-molecule wheel ring porphyrin heteronuclear metal molecule has a strong response speed to laser irradiation. The preparation method provided by the application anchors the functional molecule through an amide bond, constructs a conductive path, and realizes precise construction of the single-molecule spin electronic device. The method is simple to operate, the conditions are easy to control, and the method is helpful to realize large-scale production.

The invention belongs to the technical field of flow batteries, and discloses a V2C nanosheet composite electrode as well as a preparation method and application thereof. The preparation method comprises the following steps: etching MAX ceramic powder by using a mild acidic solution with the pH value of 4 and NaF to obtain a V2C material; carrying out silanization coupling agent treatment, inert / reducing atmosphere ice bath ultrasonic treatment and centrifugation to prepare a V2C-Si-NH2 nanosheet; a graphene electrode is soaked in the nanosheet suspension, an amide coupling agent is added for a water bath reaction, and the binder-free composite electrode is obtained. The electrode is combined through a C-C (O) NH-Si-V2C covalent bond, and the V2C nanosheet is low in defect and uniform in dispersion and has high conductivity and catalytic property. The method can be applied to all-vanadium, zinc-iron and other flow batteries, can improve the coulombic efficiency and energy efficiency of the batteries, and is suitable for industrialization of the flow batteries.

The invention discloses preparation and application of a manganese oxide doped graphene flexible electrochemical sensor, and belongs to the technical field of electrochemical sensing. The preparation method comprises the following steps: firstly, preparing a manganese oxide doped graphene electrode through one-step laser induction, then preparing a manganese oxide doped graphene flexible electrochemical sensor by using the manganese oxide doped graphene electrode, and then detecting fenitrothion through the flexible electrochemical sensor. The detection result shows that the flexible electrochemical sensor has excellent detection effect and detection stability on fenitrothion.

The invention relates to the technical field of photoelectric devices, in particular to a photoelectric memristor for multilevel storage and a preparation method of the photoelectric memristor. The photoelectric memristor comprises a supramolecular compound and a graphene electrode pair, wherein the supramolecular compound is connected between the graphene electrode pair; under the voltage of-1 V to 1 V, the supramolecular compound can form four different conductivity states. The supramolecular compound comprises a guest molecule A taking an amino group as a terminal, a guest molecule B with an ultraviolet light response group and a host molecule C with a large-size cavity structure. The three molecules form a supramolecular compound structure under Van der Waals force and hydrophobic interaction. According to the photoelectric memristor provided by the invention, stable four-state storage is realized through photoelectric coordinated regulation and control, and a feasible solution is provided for high-speed and high-density storage. The preparation method provided by the invention is mild in reaction condition, simple in process and beneficial to industrial and integrated production.

The invention discloses an intelligent ecological warning system, and belongs to the field of ecology, biotechnology and landscape design. The system comprises an ecological warning wall, a biosensing layer and an intelligent regulation and control system. According to the system disclosed by the invention, ppt-level pollutant detection sensitivity is realized through the graphene electrode array and the microfluidic photobacterium chip, and response time is shortened; by combining bionic vascular bundle irrigation and solar power supply, water and electricity consumption and operation and maintenance cost are reduced, and the maintenance period is prolonged; a modularized 3D printing structure and LoRa wireless transmission are adopted, so that manual intervention is reduced; meanwhile, CRISPR customized strains and fractal algorithm plant layout are integrated, so that the system has the functions of pollution monitoring, carbon sink appreciation and dynamic landscape interaction, and the precision, efficiency, sustainability and ecological benefits are comprehensively superior to those of a traditional technology.

Provided are a flexible molecularly imprinted sensor for in-situ and in-vivo detection of gamma-aminobutyric acid content in plants, and a preparation method and a detection method thereof. The flexible molecularly imprinted sensor includes: a flexible substrate and a graphene electrode unit, the graphene electrode unit being arranged on the flexible substrate, where the graphene electrode unit includes a conductive track, a working electrode, a counter electrode, and a reference electrode, where the counter electrode and the reference electrode are respectively located on two sides of the working electrode, and the working electrode is successively provided from inside to outside with a first modification layer, a second modification layer, and a third modification layer, the first modification layer including an AuNPs material, the second modification layer including an Fc-Ni3(HITP)2-ZnFe-LDH material, and the third modification layer including a molecularly imprinted polymer (MIP) material.