104 results about "Carbon nanotube fet" patented technology

A method is provided for doping a carbon nanotube. The method comprises exposing the nanotube to a one-electron oxidant in a solution phase. A method is also provided for forming a carbon nanotube FET device.

A light filament (206) formed from carbon nanotubes is characterized by high mechanical strength and durability at elevated temperatures, a high surface area to volume ratio, and high emissivity. Additionally, electrical resistance of the light filament does not increase with increasing temperature as much as electrical resistance of metallic light filaments. Accordingly, power consumption of the light filament is low at incandescent operating temperatures. A method for making a light filament made of carbon nanotubes includes the steps of: forming an array of carbon nanotubes (20); pulling out carbon nanotube yarn (204) from the carbon nanotube array; and winding the yarn between two leads (30) functioning as electrodes to form the light filament.

An open-cell carbon nanotube foam is made of a plurality of separated carbon nanotubes. The foam exhibits a Poisson's ratio substantially equal to zero, a compressibility of at least 85%, a recovery rate of at least 120 mm / min, a compressive strength of at least 12 MPa, a sag factor of at least 4, a fatigue resistance to no more than 15% permanent deformation when subjected to at least 1,000 compressive cycles at a strain of 85%, and / or a resilience of between 25% and 30%. The carbon nanotubes may be multiwalled carbon nanotubes that are aligned parallel to a thickness of a film comprising the foam.

Hybrid carbon nanotube FET (CNFET), static ram (SRAM) and method of making same. A static ram memory cell has two cross-coupled semiconductor-type field effect transistors (FETs) and two nanotube FETs (NTFETs), each having a channel region made of at least one semiconductive nanotube, a first NTFET connected to the drain or source of the first semiconductor-type FET and the second NTFET connected to the drain or source of the second semiconductor-type FET.

This invention relates generally to organized assemblies of carbon and non-carbon compounds and methods of making such organized structures. In preferred embodiments, the organized structures of the instant invention take the form of nanorods or their aggregate forms. More preferably, a nanorod is made up of a carbon nanotube filled, coated, or both filled and coated by a non-carbon material. This invention is further drawn to the separation of single-wall carbon nanotubes. In particular, it relates to the separation of semiconducting single-wall carbon nanotubes from conducting (or metallic) single-wall carbon nanotubes. It also relates to the separation of single-wall carbon nanotubes according to their chirality and / or diameter.

An improved microelectromechanical switch assembly comprises a linearly movable switch rod constrained via a switch bearing, the switch rod being actuated by electrostatic deflection. Movement of the switch rod to one end of its travel puts the switch assembly in a closed state while movement of the switch rod to the other end of its travel puts the switch assembly in an open state. In an embodiment of the invention, one or both of the switch rod and the switch bearing are fabricated of a carbon nanotube. The improved microelectromechanical switch assembly provides low insertion loss and long lifetime in an embodiment of the invention.

The invention relates to a lithium ion battery cathode material, which is prepared from coal coke, asphalt and a carbon nanotube in the weight ratio of (5-40):1:0.5. In the lithium ion battery cathode material, the particle size of the coal coke is 8-25 mum, and the specific surface area of the coal coke is less than or equal to 5m<2> / g; and the asphalt is coal asphalt or petroleum asphalt. A carbon modified material provided by the invention can be widely applied to a power lithium ion battery cathode material with a long cycle life. The material belongs to compound graphite, and has the advantages of high cycle performance, long battery service life, large gram volume, high compacted density, small specific surface area and excellent processing performance.

The invention discloses an antistatic PEEK composite material. The antistatic PEEK composite material is prepared from 68-84 parts of PEEK, 15-30 parts of short carbon fibers and 1-2 parts of carbon nanotubes. The short carbon fibers and the carbon nanotubes are subjected to sulfonated PEEK surface treatment and a sulfonation degree of the sulfonated PEEK is 70-80. The invention also discloses a preparation method of the antistatic PEEK composite material. Through use of the short carbon fibers and the carbon nanotubes in PEEK, wear resistance, tensile strength and modulus of the PEEK material can be effectively improved, surface resistance is uniform and antistatic requirements are satisfied. The short carbon fibers and the carbon nanotubes are subjected to high sulfonated PEEK treatment so that surface activity is improved, dispersion in the PEEK base is promoted, agglomeration is reduced, carbon fibers, carbon nanotubes and PEEK in the composite material are bonded tightly, material toughness is improved and surface resistance is reduced.

Complaint bumps used for interconnections between integrated circuit chips are made with carbon nanotubes.

The invention discloses a polyion liquid-modified carbon nano-tube hybrid material and a preparation method thereof. The preparation method comprises the following steps: under the protection of nitrogen, mixing and heating vinyl N-heterocycle and 2-chloroethylamine hydrochloride; performing Menshutkin reaction to obtain an ionic liquid hydrochloride; neutralizing to obtain ion liquid monomers; reacting a certain ratio of monomers and a metal salt under a heating condition to obtain an ion liquid which contains an amino end group and a transition metal; dissolving obtained ion liquid in water, adding a fixed amount of carbon nano-tubes, performing ultrasonic dispersing, adding an initiator to perform surface-initiated polymerization, and filtering and drying a product to obtain the polyion liquid-modified carbon nano-tube hybrid material. According to the polyion liquid-modified carbon nano-tube hybrid material and the preparation method thereof, the hybrid material is prepared by coating the carbon nano-tubes with polyion liquid; the hybrid material has toughening and catalyzing functions; the preparation method has the characteristics of simple process and easiness in control.

High-brightness short-wavelength radiation source contains a vacuum chamber with a rotating target assembly having an annular groove, an energy beam focused on the target, a useful short-wavelength radiation beam coming out of the interaction zone, wherein the target is a layer of molten metal formed by a centrifugal force on a surface of the annular groove facing a rotation axis. A replaceable membrane made of carbon nanotubes may be installed on a pathway of the short-wavelength radiation beam for debris mitigation. In the embodiments of the invention the energy beam is a pulsed laser beam. The pulsed laser beam may consist of pre-pulse and main-pulse, with parameters such as laser pulse repetition rate chosen in order to suppress debris. In other embodiments the energy beam is the electron beam produced by an electron gun and the rotating target assembly is a rotating anode.

The invention discloses an antistatic PEEK resin material. The antistatic PEEK resin material is prepared from 68 to 84 parts of PEEK, 15 to 30 parts of short carbon fiber and 1 to 2 parts of carbon nanotubes, wherein the carbon nanotubes have undergone surface treatment by sulfonated PEEK, the sulfonation degree of sulfonated PEEK is 70 to 80, and the short carbon fiber has undergone surface oxidation treatment. According to the invention, the short carbon fiber and carbon nanotubes are added into PEEK, so wear resistance, tensile strength, modulus and other performance of a PEEK material can be effectively improved, and surface resistance is reduced; different methods are employed for surface modification of the short carbon fiber and carbon nanotubes, so dispersion of the short carbon fiber and carbon nanotubes in a PEEK matrix is more uniform and agglomeration is reduced compared with surface modification through a same method; and the carbon fiber, carbon nanotubes and PEEK in the resin material are more tightly bonded, which is beneficial for improving the mechanical performance of the material and reducing surface resistance.