535 results about "Van der Waals force" patented technology

To provide a glass substrate-holding tool which is capable of avoiding scratching to the deposition surface of a glass substrate and dusting thereby caused as well as scratching and deposition of foreign substances at a center portion of the rear surface of the substrate and which is capable of suppressing dusting from the holding tool itself at the time of forming a multi-layered reflection film and an absorptive layer.A glass substrate-holding tool having, formed on a surface of a flat base, a catching portion for catching and holding by van der Waals forces, wherein the catching portion is in contact with only the periphery of the glass substrate.

An anti-slip end effector for transporting a workpiece, configured to be attached to a robotic arm, includes: a workpiece-supporting area for placing a workpiece thereon for transportation; and at least one anti-slip protrusion disposed in the workpiece-supporting area for supporting a backside of the workpiece, said anti-slip protrusion having a top face capable of contacting and adhering to the backside of the workpiece by van der Waals force and capable of pivoting on a pivot axis, said pivot axis being disposed away from a center of the top face as viewed from above.

An anti-slip end effector for transporting a workpiece, configured to be attached to a robotic arm, includes: a workpiece-supporting area for placing a workpiece thereon for transportation; and at least one anti-slip protrusion disposed in the workpiece-supporting area for supporting a backside of the workpiece, said anti-slip protrusion having a top face capable of contacting and adhering to the backside of the workpiece by van der Waals force and capable of pivoting on a pivot axis, said pivot axis being disposed away from a center of the top face as viewed from above.

The invention is directed to nanostructure surface treatments, coatings or modifications formed from nanoscale building blocks. The nanostructure surface treatments, modifications or coatings have hydrophobic, hydrophilic and surface adherence properties. The nanoscale building blocks have orientation, geometry, packing density and composition that may be adjusted to control the unique surface characteristics of the desired treatment, coating or modification. Applications of this nanostructure technology include surgical clips, staples, retractors, sutures and manipulators where an improvement in traction, retention or occlusion is desired without excessive material or tissue deformation or where high compressive forces would be undesirable, dangerous or ineffective. In one aspect, a nanostructure surface treatment for a medical device having an external surface is disclosed, wherein the treatment is applied on the external surface to provide a hydrophobic or a hydrophilic surface. With this aspect, the treatment comprises titanium dioxide and provides nanoscopic structures having nearly vertical sidewalls. The treated surface of the device has contact angles greater than or equal to 150 degrees. The vertical sidewalls provide a negative capillary effect and have a width of about 200 nm. The vertical sidewalls attach to a wet surface by the negative capillary effect. The van der Waals forces of the vertical sidewalls enable the treated surface to attach to a dry surface. The treatment may be vapor deposited and cured on the device, or the treatment may be laser blasted on the device.

Ultradispersed ones of primary particles of nanometer-sized carbon are obtained by applying a wet-type milling method and / or a wet dispersion method to an aggregate structure of the primary particles to overcome van der Waals forces, by which forces the primary particles are held together to form the aggregate structure, whereby the ultradispersed primary particles are obtained in a colloidal dispersion on a large-scale basis at low cost without using any additive. In a method of manufacturing the ultradispersed primary particles, the wet-type milling method is carried out in a ball mill, preferably in combination with a high-energy ultrasonic-wave process carried out in a dispersing medium such as pure water, whereby a colloidal solution or slurry with a low-concentration of the primary particles ultradispersed in the dispersing medium is obtained.

A carbon nanotube composite includes a carbon nanotube structure and a number of nanoparticles. The carbon nanotube structure includes a plurality of carbon nanotubes connected to each other via van der Waals force. The nanoparticles are distributed in the carbon nanotube structure. The carbon nanotubes in the carbon nanotube composite are connected to each other to form a carbon nanotube structure and are arranged in an orderly or disorderly fashion.

The invention discloses a two-dimensional black phosphorus / transitional metal chalcogenide heterojunction based device. The heterojunction adopts a laminated structure of two-dimensional black phosphorus nanometer slices and two-dimensional transitional metal chalcogenide nanometer slices; the number of the two-dimensional black phosphorus layers is 1-50; the two-dimensional transitional metal chalcogenide comprises 1-50 layers in terms of thickness; the two kinds of two-dimensional materials are prepared and synthesized through chemical vapor deposition, mechanical stripping, liquid phase stripping and the like; and the device can be used for preparing a bipolar transistor, a field effect transistor or a photoelectric detector / photoelectric diode. The two-dimensional black phosphorus / transitional metal chalcogenide heterojunction device has the advantages as follows: a combination of the two kinds of two-dimensional materials of black phosphorus and the transitional metal chalcogenide is adopted to form the brand new pn type heterojunction structure; the heterojunction is combined based on natural van der Waals forces among materials; compared with the conventional heterojunction epitaxial growth process, the heterojunction device provided by the invention is easier to prepare; and compared with the existing bulk material, the heterojunction device provided by the invention is smaller in size, thinner, higher in flexibility and higher in the integration degree, so that the two-dimensional black phosphorus / transitional metal chalcogenide heterojunction device has the potential to be applied to the wearable equipment in the future.

The invention relates to a twisted line which comprises a plurality of carbon nano tubes that are connected with each other end to end by van der waals force, wherein the twisted line further comprises conducting materials covering on the surfaces of the carbon nano tubes.

A transistor includes one or more channel taps containing a stack consisting at least in part of a semiconductor an interfacial III-VI layered compound and a conductor. The III-VI compound consists primarily of atoms from Groups IIIA-B and from Group VIA of the Periodic Table of the Elements in an approximate 1:1 ratio. These materials may be formed as layers of covalently bonded elements from Groups IIIA-B and covalently bonded Group VIA elements, adjacent and respective planes of which may be bonded by Van der Waals forces (e.g., to form a single bilayer consisting of a single plane of atoms from Groups IIIA-B and a single plane of Group VIA atoms). One particular III-VI material from which the interfacial layer is made, especially for p-channel transistors, is GaSe. Other III-VI compounds, whether pure compounds or alloys of pure compounds, may also be used.

The invention discloses a flexible and transparent electrode film based on silk fibroin which comprises a flexible supporting layer and a conducting layer and is characterized in that the conducting layer is a silver nanowire film formed by silver nanowire interwoven networks. The flexible supporting layer is a silk fibroin film, wherein silk fibroin solution is dried and solidified to adhere to the silver nanowire film through Van der Waals force to form the silk fibroin film. The electrode film has good light transmittance and conductivity at the same time and is high in flatness and binding force and good in affinity with the human body. Particularly, the silk fibroin is adopted as the supporting layer, so that the supporting layer is good in biocompatibility, biological degradability and optical performance and free of poison and irritation, the degradation process is also controllable, and the electrode film can be used in the aspects of electronic products, conductive film substrates, screens and others making intimate contact with the human body. The invention further provides a manufacturing method and application of the electrode film.

The superfine compound active adsorbing indoor air purifier is prepared through mixing attapulgite or sea-foam via activation and superfine processing, clay and zeolite in certain proportion, polymerization, pelletizing and stoving, and further mixing with granular active carbon in certain ratio. The air purifier has great specific surface area and rich and complicated molecular pores in the size matching molecules of benzene, toluene, xylene, formaldehyde, ammonia, radioactive radon and other pollutant, so that the harmful molecules are adsorbed in the purifier owing to van der Waals force and the air is purified.

The present invention provides methods of forming uniform nanoparticle based monolayer films with a high particle density on the surface of a substrate comprising (a) forming a surface modifying layer on a substrate using a material comprising a first functional group that chemically binds to the substrate and a second functional group comprising a group capable of forming van der Waals forces, (b) applying to the surface modifying layer a solution comprising nanoparticles, and (c) curing the resultant structure formed at step (b) for a predetermined time to form a nanoparticle based monolayer film. The present invention further provides substrates and devices comprising the nanoparticle based monolayer films.

The invention discloses a machine-like stripping device for ton-scale production of graphene and a production method of the machine-like stripping device. The machine-like stripping device is characterized by comprising one or more stages of stripping devices which are connected in series, wherein each stripping device comprises a material bin, a rotor, a material distribution bin and the like, the lower part of the rotor is matched with that of the material bin, and when the rotor rotates, relative friction is formed at the matching position between the outer surface of the rotor and the inner surface of the material bin. During use, graphite raw material receives the shearing action of a friction force at the matching position, and Van der Waals forces among graphite layers of the graphite collapse so that the graphite is stripped and thinned into graphene which is fed into the material distribution bin. The machine-like stripping device for ton-scale production of graphene is simple to operate and can realize batch production of graphene, and the obtained graphene has a perfect crystal structure, a large specific surface area and good conductivity.

A method to apply nano-crystalline diamond onto a selected substrate, including preparing Nanodiamond slurry of nanodiamond particles dispersed in a medium. The medium may include a liquid or a sol-gel. The selected substrate is immersed in the Nanodiamond slurry for a predetermined period of time. Then the substrate is removed from the slurry. The substrate is then dried with a flow of inert gas. The substrate is left coated with a coating of the nanodiamond particles that are highly adherently held by van der Waals forces.

A process and apparatus is disclosed capable of removably adhering a semiconductor substrate to a substrate support in a sub-atmospheric environment using a plurality of individual fibers, each mounted at one end adjacent the substrate support, and each having a loose end. When the portions of the fiber adjacent the loose fiber ends are each brought into contact with the under surface of the substrate, Van der Waals forces are exerted between the substrate and the fibers to urge the substrate toward the underlying substrate support. In a preferred embodiment, the substrate and portions of the fiber adjacent the loose fiber ends are first vertically brought into physical contact with one another, and then a horizontal force is applied to horizontally move, with respect to one another, the substrate and the portions of the fibers adjacent the loose fiber ends. After application of the horizontal force, a vertical force is applied between the substrate and the fibers of sufficient strength to urge the substrate and the fibers away from one another without breaking contact between the substrate and the portions of the fiber adjacent the fiber ends to thereby place tension on the substrate to urge the substrate to lie flat against the underlying substrate support.

A device and method for handing an object of interest uses one or more directional adhesive structures to adhere to the object using van der Waals forces. Each of the directional adhesive structures includes hair-like features with angled contact surfaces. The directional adhesive structures are configured such that the angled contact surfaces of the hair-like features adhere to a surface of the object using van der Waals forces when at least one force is applied to each of the base plates in a direction substantially parallel with respect to the surface of the object.

Oxide-oxide fusion bonding of wafers that includes performing a van der Waals force bonding process with a chuck having at least a flat central zone and an outer annular zone lower than the central zone, an edge portion of a mounted wafer is biased towards the outer annular zone. The van der Waals bonding wave is disrupted at the outer annular zone, causing an edge gap. A thermocompression bonding process is performed that includes heating the bonded wafers to a temperature sufficient to initiate condensation of silanol groups between the bonding surfaces, reducing the atmospheric pressure to cause degassing from between the wafers, applying a compression force to the wafers with flat chucks so as to substantially eliminate the edge gap, and performing a permanent anneal bonding process.

The invention discloses a lithium ion battery silicon oxide and carbon composite negative pole material and a preparation method thereof. The technical purposes are improvement of first Coulomb effect, capacity and circulating properties and reduction of cost. According to the lithium ion battery silicon oxide and carbon composite negative pole material, a graphite-based silicon oxide composite material serves as a body, the body is wrapped with a pyrolytic carbon wrapping layer of an organic carbon source, and amorphous carbon in the graphite-based silicon oxide composite material is bonded with a silicon oxide and graphite with a nanoporous structure by means of Van der Waals force. The preparation method includes the steps of nano-silica sol preparation, ultrasonic dispersion, primary sintering, wrapping and secondary sintering. Compared with the prior art, stress generated by size change of the silicon oxide during high lithium intercalation and deintercalation is effectively reduced, and interfacial potential energy between materials is effectively reduced, so that the material has high specific capacity, and is suitable for high-rate charge and discharge, simple in preparation method, easy to control, low in cost and suitable for large-scale industrial production.

The invention discloses a conductive agent dispersion liquid and a preparation method thereof. The conductive agent dispersion liquid contains a conductive agent, a solvent and a dispersion agent, wherein the dispersion agent contains aromatic rings and can be bound with the surface of the conductive agent by Van der Waals force among molecules and pi-pi action force between planes; and the solubility in the first solvent at the temperature of 25 DEG C is not smaller than 10wt%. The invention also discloses an electrode slurry and a preparation method thereof, and a battery electrode prepared from the electrode slurry and a battery. As using the matter which contains the aromatic rings and can be bound with the surface of the conductive agent by Van der Waals force among molecules and pi-pi action force between planes as the dispersion agent of the conductive agent, the battery capacitance, the charging and discharging capacitance and the rate discharge property are effectively enhanced.

The invention discloses a nanocellulose / graphene composite flexible thin film as well as a preparation method and application thereof. According to the method disclosed by the invention, the surface of a graphene-shaped structure is uniformly coated with nanocellulose under the action of a hydrogen bond, Van der Waals force, a II-II bond and the like between a nanocellulose molecule and a graphenemolecule, so that a nanocellulose / graphene (CNC-G) composite flexible thin film with uniform distribution and a smooth surface is formed. The nanocellulose / graphene composite flexible thin film disclosed by the invention has good flexibility and transparency, can be uniformly dispersed in a solvent containing water and exists stably for a long time. The preparation method disclosed by the invention has the advantages of abundant raw material source, simple operation technology, low cost, greenness, environment friendliness, high efficiency and the like. The nanocellulose / graphene (CNC-G) composite flexible thin film disclosed by the invention has the advantages of high purity, uniformity in compounding and good composition structure and has a wide application prospect in the fields including flexible electronics, catalysis, electrochemistry and the like.

The invention provides a method for making a 3D NAND flash memory with a lot of stack layers, and a 3D NAND flash memory. The method includes the following steps: providing a substrate wafer, whereinthe substrate wafer has an MOS device area and a first storage device area; providing a bonding wafer, wherein the bonding wafer has a metal connection wire area and a second storage device area; carrying out bonding connection: turning the bonding wafer to make the metal connection wire area correspond to the MOS device area and the second storage device area correspond to the first storage device area, and enabling the bonding wafer and the substrate wafer to be directly bonded with the help of Van der Waals force; and carrying out treatment after connection: thinning the substrate of the bonding wafer, making a metal interconnection layer, and forming metal connection wires between MOS devices and storage devices. The limit on the number of layers of an N / O stack structure in the existing process is overcome. A 3D NAND flash memory with a lot of stack layers is obtained. The storage capacity of the 3D NAND flash memory is improved.

Ultradispersed ones of primary particles of nanometer-sized carbon are obtained by applying a wet-type milling method and / or a wet dispersion method to an aggregate structure of the primary particles to overcome van der Waals forces, by which forces the primary particles are held together to form the aggregate structure, whereby the ultradispersed primary particles are obtained in a colloidal dispersion on a large-scale basis at low cost without using any additive. In a method of manufacturing the ultradispersed primary particles, the wet-type milling method is carried out in a ball mill, preferably in combination with a high-energy ultrasonic-wave process carried out in a dispersing medium such as pure water, whereby a colloidal solution or slurry with a low-concentration of the primary particles ultradispersed in the dispersing medium is obtained.

The invention discloses a method of preparing a GaN monocrystal substrate in a mechanical removal way. A thin film of layered structure is pre-deposited between a GaN monocrystal thick film and a substrate and the GaN monocrystal thick film and the substrate are separated in a horizontal sliding mode to obtain a complete large size self-supporting GaN monocrystal substrate by utilizing the fact that the van der Waals force of the film of layered structure between the substrate and the GaN monocrystal thick film is weak and easy to slip. According to the method of preparation GaN monocrystal substrate in a mechanical removal way, a low-cost preparation method is utilized to obtain the self-supporting GaN monocrystal substrate which is smooth in surface without cracks and high-quality in crystal, the controllable separation of the GaN monocrystal thick film and the heterogeneous substrate is achieved with simple device with no need of other complex technology devices like the laser lift-off and the lithography etching nanometer graphics and no need of in situ etching or laser lift-off components in the reaction chamber, and the process stability, easy control and application to industrial production can be obtained.

The invention provides a nano metal oxide / MXene heterostructure composite material and a preparation method thereof. According to the nano metal oxide / MXene heterostructure composite material, nano metal oxide is adsorbed on the surface of lamella MXene through van der waals force and evenly dispersed on a lamella base material to form the composite material of an integrated structure; metal oxideparticles with the size as 5 to 100nm occupies 10 to 90% of the total mass of the composite material; the nano metal oxide is one or several of TiO2, SnO2, Fe3O4, RuO2 and MnO2; the nano metal oxideis in a shape of one or several of a nanorod shape, a nanowire shape and a quantum dot shape. According to the nano metal oxide / MXene heterostructure composite material disclosed by the invention, thenano metal oxide is evenly dispersed on the MXene lamella, morphology is regular, a proportion is adjustable, and material conductivity is remarkably improved; the preparation method has the advantages of simpleness, lower cost and large-scale preparation; when being applied to lithium ion batteries or super capacitor composite materials, the nano metal oxide / MXene heterostructure composite material has excellent cycling performance and rate capability.

An anode of a lithium battery includes a carbon nanotube film structure and an anode active material. The carbon nanotube film structure includes a number of carbon nanotubes joined by van der Waals force therebetween. The anode active material is located on surface of the carbon nanotubes to form a tubular structure.

The invention discloses a forage liquid phytase preparation with high enzyme activity retention rate. The forage liquid phytase preparation is prepared by adding polyethylene glycol 6000, trehalose, sodium benzoate and pure water to original phytase enzyme liquid; and adjusting a pH value to 4.5-5.5, wherein hydroxide radicals in the polyethylene glycol 6000 are bonded with carboxyls, aminos, and the like on the surfaces of an enzyme protein molecule and an activity center thereof by covalent bonds, hydrogen bonds and Van der Waals force so that the activity center of the enzyme protein molecule and the whole enzyme protein molecule are protected; the trehalose (stabilizing agent) improves the permeation pressure of enzyme solution to reduce the stretching degree of the enzyme protein molecule, and the enzyme protein molecule is relatively in a dewatering state to shrink, thereby improving the stability; and the sodium benzoate (preservative) takes the effect of improving the biological stability of liquid enzymes and the pH range is optimally selected from 4.5 to 5.5 . The invention is used for the field of fodder additives.

The invention relates to organic phosphonic (phosphoric) acid rare-earth salt fire retardant and a synthetic method and application thereof, which belongs to the fields of fine chemical and macromolecular materials. The low-toxic, low-smoke, environment-friendly and efficient fire retardant is formed by combining with rare earth elements in organic phosphonic (phosphoric) acid structure. Compared with the organic phosphorous compound, the fire retardant has extremely high stability at normal temperature and plastic processing temperature; moreover, the use of rare earth elements ensures that the fire retardant and other components in macromolecular material are formed into a combination having better effects than Van Der Waals Force, hydrogen bond and the like; particularly, when mixed with other components of inflatable composite fire retardant, the fire retardant can obtain better synergic effects than currently used phosphinates such as aluminum phosphinate, zinc phosphinate and the like; moreover, the obtained macromolecular material can maintain better physical and mechanical properties.

The catheter includes a hollow shaft, at least one adhering portion provided on an outer surface of the shaft, and plural protrusions arranged on the adhering portion. The protrusions are configured to increase a contact surface area to show adhesive strength due to a Van der Waals force.

After forming an opening, a resist film is formed on the entire surface and a resist pattern is formed by patterning the resist film. The shape of the resist pattern is such that it covers one side of the bottom of the opening. As a result, a Si substrate is exposed only in one part of the opening. Then, using the resist pattern as a mask, a catalytic layer is formed on the bottom of the opening. Then, the resist pattern is removed. Carbon nanotubes are grown on the catalytic layer. At this time, since the catalytic layer is formed on only one side of the bottom of the opening, the Van der Waals force biased towards that side works horizontally on the growing carbon nanotubes. Therefore, the carbon nanotubes are attracted towards the nearest side of the SiO2 film and grow biased towards that side.

The invention discloses a method for plating a nickel layer on the surface of a multiwall carbon nanotube, and relates to a method for plating a metal layer on the surface of the multiwall carbon nanotube. The invention solves the problems that the multiwall carbon nanotube is subject to aggregation and reacts with oxide easily to cause structural damage. The method comprises the following steps: firstly, acidizing treatment; secondly, preparation of sensitizing solution; thirdly, sensitization treatment; fourthly, activation treatment; and fifthly, plating treatment. After the nickel layer is plated on the surface of the multiwall carbon nanotube by the method, the Van der Waals force of the surface of the multiwall carbon nanotube is weaken and the problems that the multiwall carbon nanotube has the trend of mutual intrication and is subject to aggregation easily can be improved; and the nickel layer on the surface of the multiwall carbon nanotube can protect the carbon nanotube and can prevent the surface of the multiwall carbon nanotube from being damaged by other media (oxidizing medium and corrosion medium). In addition, due to the fine size of carbon nanotube, nickel with the crystal grain on the nano-scale can be better dispersed and the chemical catalytic activity of the nickel can be improved.