Carbon nanotubes are expected to have a wide range of applications in fields such as energy, electronics, and nanotechnology.
Carbon nanotubes have a structure that resembles a cylindrical shape formed by rolling graphite sheets with carbon atoms arranged in a hexagonal pattern, but their properties change significantly depending on the way they are rolled (chirality). CNTs exhibit unique electrical characteristics due to their high aspect ratio, as they are very long relative to their diameter, and can become semiconducting or metallic depending on the size of the diameter and the way the graphite sheets are rolled. They have various features such as high electrical conductivity and thermal conductivity, and high mechanical properties. Ultra-fine/lightweight: Nano-sized/half the weight of aluminum High mechanical strength: About 100 times that of steel High conductivity: About a thousand times that of copper, higher than silver High thermal conductivity: About 10 times that of copper, higher than diamond High melting point: Over 3000 degrees (in an oxygen-free state) Flexibility: Very flexible and strong against bending and stretching Chemical stability: Stable against chemical reactions Temperature stability: Stable against temperature changes High corrosion resistance: Excellent corrosion resistance High lubricity: Excellent lubricity
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CharacteristicsSpecific Examples Shape/SizeNano-sized aggregates with a very large aspect ratio ・Bundles of SWNTs (diameter 0.5–3nm, length ~10µm) ・MWNTs (diameter 5–100nm, length ~20µm) The bulk density is very low at 0.02–0.15g/cm3 ChemicalComposed of sp2 hybridized carbon atoms, chemically and thermally extremely stable The particle surface is hydrophobic The true density is 1.3–1.4g/cm3, comparable to that of normal resins ElectricalThe current density is 1GA/cm2, 100 times that of copper The electron mobility is 70 times that of silicon SWNTs are a mixture of metals and semiconductors, while MWNTs have metallic conductivity Excellent electron emission characteristics MechanicalTensile strength is 50–70GPa, 100 times that of steel Tensile modulus is 2000–5000GPa Flexible, elastic, ductile, and has good lubricity ThermalThermal conductivity is 2000–3000W/mK, 10 times that of copper and 3 times that of diamond OpticalThe refractive index is 1.5–1.6 The color tone is dark but neutral
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Field Usage Function Energy Lithium-ion battery Electrode material Energy application example Capacitor Electrode material Fuel cell Catalyst support Electronics Transparent conductive film Conductive channel Electronics application example Transistor FET channel LSI wiring Wiring material Materials Conductive paint/resin Conductive filler Materials application example Conductive paper/fiber Conductive filler Reinforced resin/reinforced metal High-strength filler Heat dissipation material High thermal conductivity filler Bio Cell culture Cell proliferation Bio application example Biosensor High-sensitivity sensor material Drug delivery Drug carrier Nanotechnology Scanning probe microscope SPM probe Nanotechnology application example Manipulation Tweezers
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Our company is a manufacturer and seller of ceramic raw materials with a history of over 80 years. In the vicinity of Seto City in Aichi Prefecture, the hometown of pottery, there are large deposits of high-quality silica sand, which is the main raw material for ceramics and glass. Our main business is to wash, crush, remove impurities, and sort the silica sand to meet our customers' needs. Additionally, we have successfully developed processing technology to utilize feldspar from the northeastern part of Aichi Prefecture as a raw material for glass.
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