The present disclosure relates to metal alloys for biosensors. An electrode is made from the metal alloy, which more specifically can be a nickel-based alloy. The alloy provides physical and electrical property advantages when compared with existing pure metal electrodes.

Nickel alloys for biosensors

The invention discloses a device and an application method for depositing a film on a side wall of a micro-channel plate by using pressure difference The device comprises a positive pressure chamber and a negative pressure chamber, wherein a communication channel is arranged between the positive pressure chamber and the negative pressure chamber; an air inlet and an air outlet are respectively formed in the positive pressure chamber and the negative pressure chamber; a support for fixing the micro-channel plate is arranged in the middle of the communication channel; a sol liquid is filled into the positive pressure chamber and the negative pressure chamber According to the device and the application method, the pressure difference on two sides of the micro-channel plate is utilized to achieve flowing of the sol liquid of a film material to be deposited inside a micro-channel, and subsequently the sol adhered to the side wall of the micro-channel is subjected to high-temperature treatment so as to achieve deposition of the film onto the side wall of the micro-channel plate The thickness of a single deposited film depends on the sol concentration and the pressure difference on two sides of the micro-channel plate Due to adoption of the device and the application method, the difficult problem of orientation flowing of the sol liquid of the film material to be deposited inside the micro-channel of a small size is solved, and the deposition of the film material onto the side wall of the micro-channel plate is achieved

Device and application method for depositing film on side wall of micro-channel plate by using pressure difference

The invention discloses a chemical nickel-plating palladium alloy plating solution and technology. The chemical nickel-plating palladium alloy plating solution is characterized by comprising 0.1g/L to 25g/L of nickel salt, 0.1g/L to 5g/L of palladium salt, 5g/L to 30g/L of a reducing agent, 5g/L to 40g/L of a complexing agent, 1mg/L to 50mg/L of a stabilizing agent and 5g/L to 30g/L of a buffer agent. The proportion of the nickel salt and the palladium salt in the plating solution is adjusted, and therefore the composition proportion of nickel and palladium in the alloy can be changed; and alloy coatings with different palladium contents are obtained, and the palladium contents are adjustable within the range of 1wt% to 90wt%.

Chemical nickel-plating palladium alloy plating solution and technology

The invention provides a method for growing a heterojunction in a silicon microchannel plate in the technical field of microelectromechnical systems. The method comprises the following steps: S1, immersing the silicon microchannel plate into a surfactant to eliminate air in a silicon microchannel and activate silicon, and then putting the silicon microchannel plate into a chemical nickel-plating solution to plate porous nickel; S2, putting a nickel plated silicon microchannel plate into a polyalcohol mixed with a sodium salt catalyst for ultrasonic processing and then performing a solvent thermal reaction to form a nickel plated silicon microchannel plate having an inner wall coated by a nickel carbide; S3, then annealing to obtain a nickel plated silicon microchannel plate having the inner wall coated by graphene; and S4, putting the nickel plated silicon microchannel plate having the inner wall coated by the graphene into a sulfur source and molybdenum source mixed solvent for a heating reaction to form a nickel plated silicon microchannel plate having the inner wall coated by a molybdenum disulfide/graphene heterojunction. According to the method provided by the invention, through chemical nickel plating, solvent thermal carburization and hydrothermal synthesis performed step by step, the heterojunction can be grown in the silicon microchannel; and the method is environment-friendly, simple to operate and low in cost.

Method for growing heterojunction in silicon microchannel plate

The invention discloses a high-performance electrochemical capacitor plate material and a preparation method thereof, and belongs to the field of capacitor manufacture. The high-performance electrochemical capacitor plate material is silicon micro-channel supported neodymium-doped bismuth titanate, and adopts the structure that a neodymium-doped bismuth titanate thin film layer is generated on the inner wall of a three-dimensional silicon micro-channel plate through vacuum filtration and high-temperature oxidation to be used as an electrochemical capacitor active layer. The preparation method of the high-performance electrochemical capacitor plate material comprises the following steps: preparing the three-dimensional silicon micro-channel plate by adopting an electrochemical method, then, depositing a nickel layer by adopting a electroless plating method, preparing a nano-neodymium-doped bismuth titanate thin film layer by adopting a sol-gel method, and finally, performing rapid thermal annealing in an oxygen atmosphere, so as to form a neodymium-doped bismuth titanate/silicon micro-channel composite structure material. The high-performance electrochemical capacitor plate material provided by the invention provides a short transmission/diffusion path length, has larger specific area, and is conductive to obtaining higher energy density and power density.

High-performance electrochemical capacitor plate material and preparation method thereof

The invention discloses a method of electroless nickel plating on silicon substrate microchannel, comprising the following steps: prepared microchannel is put into aqueous solution containing 1% of polyoxyethylene octyl phenyl ether to be soaked for 10-30 seconds; hexahydrated nickel, sodium dodecyl sulfate, fluorinated ammonia, sodium citrate, ammonia water and ammonium sulfate are prepared into solution; the microchannel in step 1 is washed by deionized water and put into the solution, alkaline condition of the solution is preserved at a pH value of 75-85, the temperature is controlled at 80-85 DEG C, and the solution is deposited for 5-10 minutes; the microchannel is taken out after the deposition and is washed by deionized water, thus obtaining 3D current collecting layer with high specific surface area The electroless nickel deposition technology of the silicon substrate microchannel has the advantages of low cost, simple operation and easy realization; the microchannel has uniform porosity and comparatively large specific surface area and aspect ratio

Method of electroless nickel plating on silicon substrate microchannel

The invention belongs to a micro-biosensor and particularly relates to a manufacturing method of a silica-based integratable micro-glucose sensor. The existing glucose sensor takes a glucose oxidase electrode as a device for molecular recognition and signal conversion, thus having poor stability and restricting the application of the glucose sensor on the basis of enzyme. The manufacturing methodcomprises the following steps of: manufacturing a silicon micro-channel by using a P-typed single-side polishing silicon wafer through electrochemical etching; depositing the silicon micro-channel ineletroplating solution without electricity at the temperature of 80 DEG C for 30-45 minutes; and taking out and washing the silicon micro-channel with deionized water, and obtaining the silica-based integratable micro-glucose sensor. The invention has the advantages that: the electrochemical process is adopted, the cost is low, and the operation is simple; the micro-channel has even porosity, andthe ratio of the specific surface area to the depth is big; the eletroplating solution without electricity has simple preparation and low price; no influence on the glucose test is generated; three-dimensional structure is beneficial to the contact between the glucose and active substances, and the improvement of the oxidation current; and the micro-biosensor is beneficial to the exchange reaction of ions and is miniaturized and integrated, thus being beneficial to large-scale production.

Method for making silicone base integrable miniature glucose sensor

The invention relates to a pole plate material of a super-capacitor, and a preparation method thereof, which are based on the micro-electro-mechanical-system silicon process and belong to the filed of capacitor manufacturing. In the pole plate material of the super-capacitor, a nickel protoxide thin film is wrapped on a silicon micro-channel substrate layer. The preparation method of the material comprises the following steps: an electrochemistry method is used for making a silicon micro-channel which is then taken as a substrate; after surface pretreatment is finished, a nickel layer is deposited in an electroless nickel plating solution; finally, fast thermal annealing is carried out in the atmosphere of oxygen; and nickel protoxide/silicon micro-channel compound material is formed. The pole plate material of the super-capacitor has large specific area and high chemical activity, is beneficial for electrolyte to be in better contact with active materials and can obtain relatively high charge storage capability and better capacitance characteristic; in addition, the combination of the pole plate material with the current micro-electronic processing technique can cause the super-capacitor to be easier for miniaturization and integration.

Super capacitor plate material and preparation method thereof

The invention relates to the field of fuel-cell catalyst, in particular discloses a nickel palladium/ silicon microchannel catalyst. The preparation thereof is as follows: the step of electroless plating deposit of a nickel palladium membrane is carried out on a silicon microchannel frame, and a nickel palladium/ silicon microchannel composite material is processed by rapid annealing for 6 to 10 minutes at the temperature from 300 to 500 DEG C under the argon atmosphere. The nickel palladium/ silicon microchannel catalyst can be used for preparing the electrode of the integratable direct methanol fuel cell.

Bairui Tao

Papers

Method of electroless nickel plating on silicon substrate microchannel

Method for making silicone base integrable miniature glucose sensor

Super capacitor plate material and preparation method thereof

Nickel palladium/ silicon microchannel catalyst and application thereof on preparing electrode of integratable direct methanol fuel cell