82 results about "Sandwich type" patented technology

The invention discloses a sandwich-type flexible capacitive pressure sensor, and relates to the technical field of pressure sensors, the sandwich-type flexible capacitive pressure sensor comprises a photoresist layer and a fixed cylinder, the surface of the photoresist layer is provided with a flexible substrate layer, the surface of the flexible substrate layer is provided with a lower metal electrode layer, the surface of the lower metal electrode layer is provided with a flexible dielectric layer, and the flexible dielectric layer is provided with an upper metal electrode layer and a lower metal electrode layer. The surface of the flexible dielectric layer is provided with an upper metal electrode layer, and the outer sides of the upper metal electrode layer and the photoresist layer are provided with a waterproof packaging layer. According to the sandwich type flexible capacitive pressure sensor, the fixing sleeve, the first pipeline and the air bag ring are arranged, and the first rotating disc can be screwed to move through a tool; and then air in the first air bag is input into the air bag ring through the first pipeline, so that the air bag ring is expanded, the connecting line is limited, and the connection between the connecting line and the connecting end is limited.

The invention discloses an oral instant film suitable for pet nutrition intervention and a preparation method of the oral instant film, and belongs to the technical field of pet oral preparations. The instant film adopts a sandwich type multi-layer structural design, sequentially comprises a first food calling layer, a core layer and a second food calling layer, can be selectively provided with a functional layer and an interface middle layer, and constructs a staggered hot-pressing laminated structure, so that the structural stability and the function delivery efficiency of a film body are remarkably improved. The core layer contains multiple composite active ingredients such as L-carnitine, coenzyme Q10, beta-glucan, glucosamine sulfate and the like, chitosan-inulin-polyglutamic acid or starch is adopted for embedding to form a first microcapsule and a second microcapsule, and intelligent delivery of temperature / pH response and gastrointestinal controlled release is achieved. The food calling layer is composed of chicken powder, fish oil powder, fructo-oligosaccharide and the like, and the feeding compliance of pets is improved.

The invention discloses a sandwich type photoelectrochemical sensor for detecting acrylamide and a preparation method thereof, a TT-Por (Co)-COF modified ITO electrode is used as a first layer, the first layer is used for selectively adsorbing AAm in a sample solution to serve as a sandwich layer, and after affinity adsorption is completed, the sandwich layer is used for selectively adsorbing AAm in the sample solution; an acrylamide aptamer marked by CdTe quantum dots is continuously added to the surface of the photoelectrode to serve as a signal incubation layer. According to the sandwich type sensor design, the property of a TT-Por (Co)-COF framework is fully utilized to realize specific adsorption of AAm, and quantum dot modification is ingeniously combined to enhance the heterojunction photoelectric conversion efficiency, so that the detection signal is effectively improved, and the quick response and high selectivity of the sensor to target molecules are ensured. In actual samples, such as acrylamide detection of potato chips and coffee, the sensor shows good performance, efficient and accurate detection can be realized, and a new direction is provided for developing a novel food processing harmful byproduct sensing method.

The invention discloses a sandwich type piezoelectric stack driver, which belongs to the technical field of piezoelectric drivers, is used for high-precision and large-stroke displacement output, and comprises a piezoelectric stack formed by alternately stacking piezoelectric ceramic pieces and metal electrode pieces, a front metal cover plate, a rear metal cover plate, a connecting rod, a pre-tightening mechanism and an adapter. The piezoelectric ceramic pieces are connected in a mechanical series connection and circuit parallel connection mode, the polarization directions are alternately arranged, longitudinal vibration of the piezoelectric ceramic pieces is overlapped in the same direction, and the driving efficiency is remarkably improved. And the connecting rod penetrates through each layer of structure and applies adjustable pre-tightening force through the elastic pre-tightening structure, so that the ceramic chip is kept in a compressed state in a high-dynamic working state, and breakage is avoided. The structure does not need high-temperature sintering, modular assembly, maintenance and component replacement are facilitated, and the maintenance cost is low. Driving parameters can be flexibly adjusted according to the size of the piezoelectric plate, and the device has the advantages of being easy and convenient to manufacture, rapid in response, high in reliability, controllable in displacement and the like and is suitable for the fields of precision manufacturing, optical adjustment, medical instruments and the like.

The present invention relates to a preparation method and application of a sandwich-type solar-driven interface evaporator, and belongs to the technical field of polymer materials. The present invention constructs a sandwich-type wetting gradient aerogel with hydrophilic-hydrophobic-hydrophilic properties, and sprays molybdenum disulfide, a two-dimensional material with high photothermal conversion effect, on the upper surface of the porous electrospun polyimide aerogel, and performs a hydrophilic treatment on the bottom surface of the super-hydrophobic three-dimensional polyimide aerogel, which is beneficial to the supply and transmission of water. Thanks to this reasonable design, the evaporator has excellent photothermal conversion efficiency, which can reach 98.8% under one sunlight intensity. The prepared sandwich-type solar-driven interface evaporator is applied to the field of seawater desalination. Its good cycle stability, salt resistance and structural stability provide a new way for solar-driven efficient and stable acquisition of fresh water.

The utility model relates to the technical field of computer display screen accessories, in particular to a sandwich type display plastic middle frame. The problems that a displayer and a supporting base cannot be adjusted, flexibility is poor, and the use experience of a user is seriously affected are solved. When the design is used, the fixing block is installed above the clamping groove formed in the second shell firstly, then the clamping plate is inserted into the clamping groove, the clamping plate is fixed through friction force between the clamping plate and the clamping groove and the fixing block, the second supporting rod is connected with the clamping plate through the rotating pieces, good damping performance exists between the rotating pieces, and the rotating pieces can rotate conveniently. Rotation adjustment of the display screen can be achieved, the use display direction is changeable and flexible, the structure is simple, assembling and disassembling are convenient and fast, practicability is high, the use experience feeling of a user is improved, the lifting assembly is matched, one end of a positioning bolt is moved out of a positioning hole formed in the surface of the second supporting rod, and adjustment of the overall height of the computer display screen can be achieved; the adaptability is high, the operation is simple and convenient, and the flexibility is high.

The utility model discloses a kind of interlayer formula automobile sunroof with dust cleaning function, it is related to automobile sunroof technical field, to solve the surface of the prior art automobile sunroof Easy to accumulate a lot of dust, dust is laid flat on the surface of sunroof, vehicle in the process of driving, dust cannot be removed by air flow either, only when washing car is cleaned, this causes a lot of dust accumulation to the both sides of sunroof after accumulation, damage transmission system and rubber strip, not conducive to cleaning. The outer side of the first horizontal moving device is slidably connected with a first quick-release seat, the outer side of the second horizontal moving device is slidably connected with a second quick-release seat, the first quick-release seat and the second quick-release seat are detachably connected with a dust cleaning rubber stick, the bottom of the dust cleaning rubber stick is attached to the upper surface of the sunroof body, a drive box is fixedly installed on one side of the transmission case, a driving device is fixedly installed in the drive box, and a driving gear is fixedly connected to the driving end of the driving device.

The application discloses a kind of " sandwich type " crosslinked polystyrene analysis magnetic beads based on swelling and layer-by-layer assembly and its preparation method and application, the preparation method of magnetic bead is: with carboxylated crosslinked polystyrene microspheres as template, Fe3O4 is loaded to the microsphere template of swelling and forms microsphere assembly;Then in containing PEI poor solvent, assemble oleic acid modified hydrophobic Fe3O4;After that, microsphere assembly is phase transfer from organic phase to water phase, then grow silica shell layer, finally sequentially modified and carboxylated by amino, obtain carboxylated " sandwich type " crosslinked polystyrene analysis magnetic bead.The application uses carboxylated crosslinked polystyrene microspheres as template, loads Fe3O4 particle by swelling method and layer-by-layer self-assembly method, realizes biocompatibility by microsphere outer package silicon, provides a kind of analysis magnetic bead with uniform size, fast magnetic separation speed, slow settling time, good biocompatibility, good detection performance, applied to the detection combined with ELISA has good technical effect.

The invention belongs to the technical field of ammonium perchlorate modification, and particularly relates to a low-sensitivity ammonium perchlorate composite material and a preparation method thereof. The preparation method of the composite material comprises the following steps: (1) mixing diethanol amine and an insensitive material to obtain a coating material; (2) adding a part of ammonium perchlorate into a stirrer according to a sandwich type feeding method, spreading the bottom of the stirrer, adding a coating material, finally adding the rest ammonium perchlorate, lifting a stirrer material cylinder, and starting a stirring reaction when the bottom of a stirring paddle is about to touch the material; and (3) after the reaction is finished, stirring and cooling the reaction system to obtain the ammonium perchlorate composite material with low friction sensitivity and impact sensitivity. The process provided by the invention is suitable for preparing low-sensitivity ammonium perchlorate with various particle sizes, has the advantages of simple process flow, good reproducibility, easiness in amplification and almost no pollution to the environment, and does not influence the performance of ammonium perchlorate while reducing the sensitivity of ammonium perchlorate.

The invention relates to the field of hemostatic dressings, in particular to a preparation method of a sandwich type antibacterial hemostatic dressing. Collagen mutants are obtained through site-specific mutagenesis, the mutants with the good effect are screened to prepare the sandwich type antibacterial hemostatic dressing, the hemostatic capacity of the sandwich type antibacterial hemostatic dressing can be remarkably improved, the wound adhesion degree can be reduced, meanwhile, the sandwich type antibacterial hemostatic dressing has the good antibacterial effect, and the sandwich type antibacterial hemostatic dressing has the good application prospect in biological hemostatic materials.

The application relates to a preparation method and application of a sandwich type photoelectrochemical immunosensor based on a Bi2S3 / BiOCl composite material, and belongs to the field of novel functional materials and biosensing detection technology; the Bi2S3 / BiOCl composite material is used as a base material, and visible light is used as a light source to obtain a photoelectric current; the two components of the base material are well matched in bands, greatly improving photoelectric conversion efficiency, so that a large output signal is obtained; different concentrations of the NSE solution to be measured result in different amounts of immune complexes, further resulting in different degrees of influence on photoelectric signals; the sensor shows high sensitivity, a wide detection range and a low detection limit to target objects, can realize rapid and sensitive determination of NSE in human serum, and has great application value for judging diseases of patients in the clinic.

The utility model discloses a crease-resistant sun-shading mechanism for a sandwich type skylight, relates to the technical field of automobile skylights, and aims to solve the problems that in the prior art, a sun-shading curtain used for a common skylight becomes loose after being used for a long time and is prone to being folded in the rolling process, so that the curtain is wrinkled, and the using effect is poor. A rolling roller is rotationally connected into the anti-wrinkling rolling mechanism, a roller blind is fixedly installed on the outer side of the rolling roller, a pressure sensor is fixedly installed in the anti-wrinkling rolling mechanism, a pressure guide roller is rotationally connected to the front end face of the pressure sensor, and an electric telescopic rod is fixedly installed in the anti-wrinkling rolling mechanism. And a first roller seat is fixedly installed at the jacking end of the electric telescopic rod, a tightening roller is rotationally connected to the first roller seat, and the roller shutter bypasses the outer side of the tightening roller and the position above the pressure guide roller to be guided out of the crease-resistant winding mechanism.

The invention relates to the technical field of unmanned aerial vehicles, in particular to an unmanned aerial vehicle architecture system which comprises a center bearing plate assembly, a vehicle arm module, a limiting transmitting assembly, a control module, an environment sensing module and a display module. The center bearing plate is of a sandwich type structure, the machine arms are installed in a dip angle mode through clamps, the limiting launching assembly is provided with an elastic mechanism, the control module analyzes the operation state based on sensor data and adjusts power output and posture strategies, and the environment sensing module monitors air pressure and vibration to adjust the power mode. Loads can be effectively dispersed, stress concentration is reduced, the rigidity and stability of the unmanned aerial vehicle in a high-vibration task are improved, the service life is prolonged, and the flight safety is guaranteed through intelligent regulation and control.

The present invention discloses a method for preparing and applying a carboxyl-containing half-sandwich iridium complex. The complex structure is shown in Formula (I). A ligand and a dimer react under reaction conditions. A base or alkaline solvent B is then added to the reaction system. The base or alkaline solvent B selectively removes protons from the phenolic hydroxyl groups of the ligand without interacting with the carboxyl groups on the ligand, thereby producing the half-sandwich iridium complex (I). This complex exhibits excellent anticancer activity, with performance comparable to or even superior to commercial cisplatin, making it a promising anticancer drug. #imgabs0#

The utility model discloses a kind of sandwich type RFID foam labels, including lower foam, the bottom of lower foam is fixedly connected with adhesive layer one, the top of lower foam is fixedly connected with anti-metal interference layer, the top of anti-metal interference layer is fixedly connected with RFID chip, the top of RFID chip is provided with upper foam, the bottom of upper foam is fixedly connected with adhesive layer two used in cooperation with lower foam, the anti-metal interference layer includes the soft magnetic sheet fixedly connected at the top of lower foam.The utility model first pass through lower foam to metal, prevent metal internal eddy current effect absorption RFID chip's electromagnetic energy, then pass through soft magnetic sheet, carbon fiber sheet and silica aerogel absorption metal reflection radio frequency signal, at this moment, radio frequency signal reflected by metal can be absorbed, so that the energy that read-write ware emits can effectively reach RFID chip, to reach the effect of good anti-metal interference capability in this way.

The invention discloses a preparation method and application of a semi-sandwich type iridium complex containing a tridentate ligand. The structural formula of the complex is shown as a formula (I), a ligand and a dimer react under the reaction condition, sodium bicarbonate is continuously added into a reaction system, proton H on coumarin unit carbon in the ligand can be selectively removed, and therefore the semi-sandwich type iridium complex (I) of the CNS tridentate ligand is obtained. Wherein a coordination carbon atom (C, blue) in the tridentate chelate ligand is derived from a coumarin unit, a nitrogen atom (N, red) is derived from a Schiff base structure, a sulfur atom (S, pink) is derived from thiosemicarbazide, the obtained iridium complex shows good anticancer activity, the performance of the iridium complex is close to or even superior to that of commercial cis-platinum, and the iridium complex is a very potential anticancer drug.

The invention discloses a preparation method of high-protein natto noodles, and belongs to the technical field of food processing. The natto powder is embedded by gelatin, so that the stability of active ingredients in the natto powder in the processing process is effectively protected, and the retention rate of nutritional ingredients is increased; through a unique sandwich type composite calendering process, dough sheets containing natto powder are placed in the middle layer, and common dough sheets cover the two sides, so that effective distribution of active ingredients of natto in the noodles is ensured, and the influence of the external environment on natto flavor substances is effectively blocked, so that the finished product noodles not only can retain specific functional ingredients of natto, but also can be used for preparing the natto noodles. The situation that the eating palatability is affected due to the fact that the characteristic flavor of natto is too prominent is avoided, the survival rate of nattokinase in the noodle cooking process is increased, and the nattokinase activity protection rate reaches 20.5%.

The invention relates to the technical field of heat exchange, and discloses a sandwich type condenser which comprises a shell, a condensing tube bundle set is fixedly arranged in the shell, a condensing agent inlet and outlet mechanism is fixedly installed at the top of the shell, and a steam inlet mechanism and a steam outlet mechanism are fixedly arranged on the left side of the shell. And by arranging the first corrugated plate and the second corrugated plate, the flow path of steam is effectively prolonged, and the condensation efficiency is improved. The condensation pipes are arranged in the inner cylinder in a triangular mode, under the same space size, the triangular arrangement can contain more condensation pipes, the heat transfer area is greatly increased, and the condensation efficiency of the device is further improved. According to the condenser, the baffle and the elastic element are arranged, so that condensate is in an intermittent flowing state, a pulse type flowing mode is formed in the condensation pipe and in an interlayer space between the outer barrel and the inner barrel, the stability of a boundary layer is effectively broken, and the condensation effect of the condenser is further improved.

The present invention discloses a novel neutral half-sandwich type [N,NH] complex with anti-cancer activity, its preparation method and application. The structural formula of the complex is shown in formula (I). The ligand reacts with the dimer under reaction conditions, and then a base or a basic solvent B is further added to the reaction system to obtain the neutral half-sandwich type [N,NH] complex I. These complexes exhibit good anti-cancer activity, and their performance is close to or even better than that of commercially available cisplatin, making them very promising anti-cancer drugs.

This invention discloses a sandwich-type photoelectrochemical sensor for detecting acrylamide and its preparation method. A TT-Por(Co)-COF modified ITO electrode is used as the first layer, which is then used to selectively adsorb AAM from the sample solution as the sandwich layer. After affinity adsorption, a CdTe quantum dot-labeled acrylamide aptamer is added to the photoelectrode surface as a signal incubation layer. This sandwich-type sensor design not only fully utilizes the properties of the TT-Por(Co)-COF framework to achieve specific adsorption of AAM, but also cleverly combines quantum dot modification to enhance the photoelectric conversion efficiency of the heterojunction, thereby effectively improving the detection signal and ensuring the sensor's rapid response and high selectivity to the target molecule. In practical samples, such as potato chips and coffee, the sensor exhibits excellent performance, achieving efficient and accurate detection, providing a new direction for developing novel sensing methods for hazardous byproducts in food processing.

The utility model discloses an air sandwich type heat insulation top cover and box type substation using the air sandwich type heat insulation top cover, and the heat insulation top cover is composed of the upper cover and lower cover of metal, the upper cover is several and sets up on the upper surface of lower cover, the cavity is formed air sandwich layer between the upper cover and lower cover, is equipped with the heat dissipation slit in the side of cavity, and the air sandwich layer is communicated with outside environment through the heat dissipation slit. The utility model uses the three -layer structure similar to "sandwich biscuit" under the condition of not influencing the original box function and overall appearance, utilizes flowing air as the medium of heat insulation and heat dissipation, prevents the thermal invasion from top to bottom, reduces the temperature rise of the box body inside caused by solar radiation from the source, reduces the temperature of box while not increasing too many box cost, and can reduce the power consumption of the heat dissipation and heat exchange of box, greatly optimizes the operation performance of box, so that it can adapt to more severe installation environment.

This invention discloses a sandwich-type piezoelectric two-degree-of-freedom robotic arm and its driving method, comprising several sequentially connected unit arm segments; each unit arm segment includes two piezoelectric oscillators and two joint parts; the joint parts of adjacent unit arm segments are spatially orthogonal to each other, and the orthogonal connection between unit arm segments and the application of preload are achieved through the joint parts between unit arm segments. This invention has a compact and simple structure, requires no gear reduction mechanisms, is easy to seal, easy to miniaturize, has low operating noise, easily achieves low speed and high torque, is unaffected by electromagnetic interference, can self-lock upon power failure, and has high control precision.

The invention discloses a multi-dimensional vibration platform with double sandwich type piezoelectric actuators arranged in the same direction and an excitation method of the multi-dimensional vibration platform, and relates to the field of high-frequency vibration engineering and micro-nano machining. Aiming at the problem that a traditional piezoelectric vibration platform is difficult to realize higher-dimension multi-degree-of-freedom operation capability, the piezoelectric vibration platform comprises an output platform, two piezoelectric actuators, two end covers and two bolts. The piezoelectric actuator is provided with a longitudinal vibration ceramic set and two bending vibration ceramic sets arranged in the orthogonal direction, and through excitation of voltage signals with the same phase or the phase difference of 180 degrees, rotation around the X axis, the Y axis and the Z axis and translation along the X axis and the Y axis are achieved. Due to structural symmetry and driver arrangement constraint, Z-direction translation is strongly coupled with an existing mode, so that high-practicability five-degree-of-freedom output is focused. The same-direction arrangement type design is adopted, the characteristic of low motion coupling is achieved, and displacement deformation of the piezoelectric actuator can be converted into different actions needed by multi-dimensional vibration of the tail end platform. The method is suitable for the fields of laser processing, vibration-assisted processing, micro-nano operation, active vibration suppression and the like.

The invention provides an immune detection method of an immune checkpoint detection kit, and belongs to the technical field of immune checkpoint detection kits.The immune detection method comprises the steps that an immune reaction system containing immune checkpoint antibodies is prepared, incubation is conducted under the constant temperature condition to form a sandwich type immune complex, and the sandwich type immune complex is obtained; phycoerythrin labeled streptavidin is added for fluorescence labeling, a flow cytometer is adopted for fluorescence signal detection after interference substances are removed through multiple times of cleaning, fluorescence image data are processed through an image partitioning optimization model, image processing parameters are dynamically adjusted through a signal enhancement algorithm function and a gating weight function, and the fluorescence image is obtained. A multi-scale feature extraction network based on a visual converter architecture is adopted to realize accurate processing of a complex fluorescence image, finally correlation analysis and matrix decomposition calculation are performed on fluorescence intensity data, and a detection analysis model is established to output index concentration values of immune checkpoints. The problem that complex fluorescence image data are difficult to process accurately at present is solved.

The utility model discloses a sandwich type radio frequency identification (RFID) foam label, which comprises a sandwich type RFID foam label body, and the sandwich type RFID foam label body comprises foam, a double faced adhesive tape and an RFID label. The foam comprises an upper foam layer and a lower foam layer, the double-faced adhesive tape comprises an upper double-faced adhesive tape layer and a lower double-faced adhesive tape layer, and the upper double-faced adhesive tape layer is attached to the top of the RFID tag and the top of the lower foam layer. According to the utility model, rapid and convenient assembly and package protection of the RFID tag are facilitated, rapid and convenient assembly with an external complete machine in a pasting manner is facilitated, operation is simple and convenient, the complexity of the assembly process is reduced, the productivity is improved, and in addition, by means of package protection, the production efficiency is improved. According to the RFID tag, the risk that the RFID tag is damaged by factors such as scratching can be effectively reduced during transportation and assembly and attachment with an external complete machine, the safety of the RFID tag is improved, the yield of the RFID tag is improved, the difficulties that the RFID tag is easily damaged and is easily interfered by signals are improved, and the production yield and efficiency are improved.

The invention relates to the field of water treatment, in particular to a sandwich type membrane as well as a preparation method and application thereof. The interlayer type membrane comprises a microporous membrane middle layer, an upper surface layer and a lower surface layer, the microporous membrane middle layer comprises a base membrane, a metal oxide and fluorosilane; the upper surface layer and the lower surface layer respectively and independently comprise a structural unit from dopamine and a structural unit from polyethyleneimine; the middle layer of the microporous membrane is a fully-hydrophobic layer, and the upper surface layer and the lower surface layer are respectively and independently hydrophilic layers. On one hand, the interlayer type membrane provided by the invention obtains good anti-wetting performance through the microporous membrane middle layer with the full-hydrophobic performance; on the other hand, high flux is obtained through the hydrophilic upper surface layer and the hydrophilic lower surface layer; and under the matching action of the middle layer, the upper surface layer and the lower surface layer of the microporous membrane, good anti-pollution performance is obtained.

The invention discloses a four-sandwich type piezoelectric actuator equidirectional central symmetry arrangement type multi-dimensional vibration platform and an excitation method, relates to the field of high-frequency vibration engineering and micro-nano control, and solves the problems that a parasitic mode is serious due to the fact that a plurality of existing piezoelectric actuators are asymmetric in structure in practical application, an additional vibration mode is easily caused by asymmetric layout, and the vibration performance is poor. The vibration platform comprises a tail end platform, four flexible hinges and four actuating units, the tail end platform is a motion output component with biaxial mirror symmetry, and the four actuating units are symmetrically arranged in a rectangular vertex mode and integrate longitudinal vibration, bending vibration ceramic sets around the Y axis and bending vibration ceramic sets around the Z axis. Through an in-phase or anti-phase excitation strategy, six-degree-of-freedom vibration output of three-axis translation and three-axis rotation can be realized. And each actuating unit realizes axial pre-tightening through a first bolt, so that the reliability of the piezoelectric ceramics is ensured. And the method is suitable for application scenes requiring high-stability and multi-axis cooperative motion, such as precision micromachining and ultrasonic-assisted manufacturing.

This utility model relates to the field of teacups, and more particularly to a sandwich-type ceramic water-filtering teacup. The technical problem this utility model aims to solve is to provide a sandwich-type ceramic water-filtering teacup that can flexibly switch between heat dissipation and heat preservation functions, achieving rapid cooling or long-lasting heat preservation to meet the needs of use in different environments. A sandwich-type ceramic water-filtering teacup includes a cup body with its opening facing upwards, and a lid disposed at the opening of the cup body; the cup body includes an outer cup; an inner cup disposed inside the outer cup with its opening facing upwards; the upper ends of the outer cup and the inner cup are integrally connected; a cavity is also provided between the outer cup and the inner cup; an opening groove is provided at the lower end of the outer cup, communicating with the cavity; a handle is also provided on one side of the outer diameter surface of the outer cup, fixedly connected to the outer cup. This utility model achieves the effect of flexibly switching between heat dissipation and heat preservation functions, realizing rapid cooling or long-lasting heat preservation, and meeting the user's needs in different environments.

This invention relates to the field of accelerometer chip technology, and discloses a sandwich-type triaxial accelerometer chip and its fabrication method. The fabrication method includes: forming a top electrode plate on a top glass substrate; fixing the top electrode plate to a first SOI substrate; thinning a first bottom silicon layer; forming a first accelerometer sub-assembly and a first Z-axis capacitor; forming a bottom electrode plate on a bottom glass substrate; fixing a second SOI substrate to the bottom electrode plate; thinning a second bottom silicon layer; forming a second accelerometer sub-assembly and a second Z-axis capacitor, which together with the first Z-axis capacitor forms a third differential capacitor; the movable mass blocks of the two accelerometer components along a first direction and the intermediate electrode block form the first differential capacitor; and the movable mass blocks of the two accelerometer components along a second direction and the intermediate electrode block form the second differential capacitor. The chip fabricated by the method disclosed in this invention has good integration, large capacitance, high sensitivity, and good linearity.

The invention discloses a suspended sandwich type nanopore array and a preparation method and application thereof, a suspended sandwich type nanopore array structure is prepared by adopting a method from bottom to top, the method is low in cost and easy for large-scale production, and a finished product is simple in preparation method and easy to synthesize. According to the structure combining the suspended sandwich and the holes, the formant during SERS detection is accurately tuned to be within the required excitation laser wavelength and Raman scattering wavelength range by adjusting the hole diameter, the hole pitch and the thickness of the middle layer, and signal enhancement is achieved to the maximum extent. The method can be used for detecting the specific solute in the organic solution with the concentration as low as 10 <-3 > mol L <-1 >.