12 results about "Graphene electrode" patented technology

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.

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.

The present application relates to the technical field of molecular device, and particularly relates to a microwave-operated graphene electrode cobalt-based complex molecular device and a preparation method thereof.The molecular device comprises a molecular junction composed of a graphene source electrode, a cobalt-based complex molecule and a graphene drain electrode.The graphene source electrode and the graphene drain electrode form a graphene electrode pair, and the cobalt-based complex molecule is connected between the graphene electrode pair by a covalent bond.The graphene source electrode and the graphene drain electrode are modified by edge carboxylation, and the carboxyl functional groups can form stable covalent bonds with the Co-based complex molecule, so that the Co-based complex molecule is anchored between the two electrodes to form a structurally stable molecular conductive path.The molecular device is constructed based on a nanoscale functional molecule, has a small volume and is conducive to realizing high-density integration.The preparation method has the advantages of simple operation, controllable conditions and high repeatability, and is conducive to large-scale production.

The application discloses a high-throughput and automatic electrochemical addressing sensing array, which is obtained by constructing a micropore array on a laser-induced graphene electrode film, obtaining a laser-induced graphene-based electrode array with micropores, then sequentially modifying titanium dioxide single crystals, platinum nanoparticles and laminin in the micropores of the laser-induced graphene-based electrode array to obtain an LIG-TiO2-Pt-Lam micropore electrode array, using the LIG-TiO2-Pt-Lam micropore electrode array as a working electrode, using multiple micropores for incubating tumor cells of the same type or different types, connecting a robot hand integrated with a reference electrode and a counter electrode to realize automatic screening of anticancer drugs. Through setting a moving track of the robot hand, electric addressing pulse signals generated by cells in each micropore after adding candidate anticancer drugs for incubation and releasing H2O2 are collected, and a computer or an instrument device is used for data storage and processing, so that high-throughput, automatic and accurate screening of the candidate anticancer drugs is realized.

The present application relates to the technical field of probabilistic bit device, and particularly relates to a single-molecule probabilistic bit device based on external circuit coupling, a preparation method and application, the single-molecule probabilistic bit device comprises a single-molecule junction formed by a graphene electrode pair and a probabilistic bit functional group, and a plurality of rigid benzene rings in a triphenylmethyl skeleton in the single-molecule junction realize high delocalization of unpaired electrons through a conjugated structure, effectively weakening the coupling effect between spin and molecular vibration, conformational fluctuation, inhibiting the rapid decoherence process caused by phonon scattering from the molecular structure level, so that the spin state can still maintain a limited coherence lifetime at room temperature, and the basic requirement of the device on the spin state holding time can be met.The device has randomness, controllability and scalability at the circuit level, and provides a hardware basis for constructing a brain-like probabilistic computing network.The preparation method provided by the present application is simple in process and is conducive to large-scale production.

This invention belongs to the field of electrode patch technology, specifically disclosing a self-generating transdermal electrostimulation (TES) ultrathin patch system and its preparation method. The system includes, from top to bottom, an outer protective layer, a power generation layer, an energy storage control unit, an electrode layer, and an adhesive layer. The adhesive layer is used to attach the electrode patch to the vagus nerve region of the ear, and the adhesive layer is conductive. The power generation layer uses a PVDF flexible piezoelectric film. When the power generation layer is vibrated, it generates microampere-level AC pulses and transmits these pulses to the energy storage control unit. The energy storage control unit stores energy and releases milliampere-level stimulation pulses to the electrode layer when the voltage reaches a set value. The electrode layer uses two flexible graphene electrodes, which are respectively arranged on both sides of the pressure-reducing groove on the back of the ear, with a gap between them. This technical solution does not require a power source or battery and can generate electricity through vibration, making the electrode patch convenient to use and suitable for long-term wear.

This invention relates to the field of microelectronic device technology, and more particularly to a single-molecule memristor-rectifier device based on supramolecular assembly and its fabrication method. The fabrication method involves covalently linking a guest molecule B to the ends of a graphene electrode pair, ensuring a stable and tight interfacial bond between the supramolecular functional molecule and the electrode. Subsequently, the graphene electrode pair connected to the guest molecule B is immersed in a solution containing a host molecule A and a guest molecule C, forming a supramolecular functional molecule between the graphene electrode pairs. The guest molecule C in the supramolecular functional molecule possesses intrinsic redox activity; its molecular structure itself can undergo reversible electron gain and loss processes, thereby achieving controllable and reversible adjustment of the intramolecular charge distribution. Under the influence of an electric field, the reversible redox reaction of the guest molecule C triggers significant changes in the intramolecular charge distribution and electron transport characteristics, ultimately achieving reliable switching between high and low resistance states of the device.

The present application provides a method of forming a graphene electrode and a method of manufacturing a solar cell using the same, wherein the method of forming a graphene electrode includes supplying a silicon-containing gas to a substrate, supplying a carbon-containing gas to the substrate, and forming a hydrogen plasma on the substrate.

This invention discloses a method for fabricating a flexible electronic nose based on laser-induced graphene. A pre-defined pattern is fabricated on a selected polyimide substrate using a laser to obtain a laser-induced graphene electrode. Three different metal oxide nanoparticles—tin dioxide, tungsten trioxide, and zinc oxide-indium oxide—are selected as gas-sensitive materials. These materials are deposited on LIG using a simple process to form gas-sensitive units, which are used to construct an orthogonal sensor array. By collecting signals from the gas-sensitive units, specific signal features of the sensing units are selected to build a dataset, which is then used for pattern recognition. The final result shows a high recognition rate for single or mixed gases. The electronic nose of this invention is simple to operate, cost-effective, highly flexible, and environmentally friendly in its gas-sensitive sensing unit design. It can also be easily attached to clothing or other substrates, making it portable and wearable.

The invention describes asymmetric supercapacitor device consisting of two six-finger (1.5 mm x 11.0 mm) interdigitated polyimide-based laser-induced graphene electrodes, mounted on a polyethylene terephthalate substrate and interconnected with a polyvinyl alcohol / sulfuric acid gel electrolyte. The laser-induced graphene electrodes are post-modified with carbon black microparticles and Prussian blue inorganic redox dye. According to the present invention, the incorporation of carbon black microparticles and Prussian blue inorganic redox dye significantly enhances the electrochemical performance and energy density of the developed supercapacitor. This improvement also increases the device’s flexibility and versatility, making it highly applicable across various industrial sectors that require rapid energy storage and release, such as flexible electronic devices, smart textiles, and wearable sensors.

The application relates to the technical field of heavy metal ion detection, in particular to a nitrogen-doped graphene modified paper-based electrode and a preparation method and application thereof. The preparation method provided by the application comprises the following steps: providing filter paper, the filter paper has a hydrophobic region and a non-hydrophobic region, and the surface of the hydrophobic region is provided with a hydrophobic barrier; printing a three-electrode system and a conductive pad on the surface of the filter paper to obtain a paper-based electrode, the three-electrode system comprises a working electrode, a counter electrode and a reference electrode; mixing an ammonium chloride and ammonia water mixed solution and an oxidized graphene solution to obtain an electrolyte; and dropping the electrolyte on the paper-based electrode to perform electrochemical deposition, thereby obtaining a nitrogen-doped graphene modified paper-based electrode. The preparation method is simple in operation and mild in conditions, and the nitrogen-doped graphene electrode prepared by the method has strong anti-interference performance, low detection limit and high sensitivity when simultaneously detecting Cd 2+ , Pb 2+ and Hg 2+ three ions in a water environment.

An antisymmetric mode resonator based on boron nitride and lithium niobate composite films and graphene electrodes, and its fabrication method, are presented. The top boron nitride dielectric layer increases the mechanical strength of the piezoelectric vibration structure and reduces energy loss. The interdigitated electrodes formed using graphene films are lighter, reducing acoustic impedance mismatch and thus better suppressing stray signals. The substrate is made of high-resistivity silicon, which has good RF characteristics and low microwave loss. Compared to traditional antisymmetric mode resonators and antisymmetric mode resonators using only graphene electrodes, stray modes are significantly suppressed. Furthermore, due to the increased mechanical strength and suppression of acoustic impedance mismatch, its Q value and k-value are improved. 2 eff They have been significantly improved, increasing to 784 and 50.89% respectively.