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Nanotube (15112442038)
A nanotube is a nanoscale cylindrical structure with a hollow core, typically composed of carbon atoms, though other materials can also form nanotubes. Carbon nanotubes (CNTs) are the most well-known and widely studied type, consisting of rolled-up sheets of graphene with diameters ranging from about 1 to tens of nanometers and lengths up to millimeters. These structures exhibit remarkable physical, chemical, and electrical properties, including high tensile strength, excellent thermal and electrical conductivity, and unique quantum effects due to their one-dimensional nature. Nanotubes can be classified into two main categories: single-walled nanotubes (SWNTs) and multi-walled nanotubes (MWNTs), each with distinct characteristics and potential applications. Since their discovery in 1991, nanotubes have been the subject of intense research and development, with promising applications in fields such as electronics, materials science, energy storage, and medicine. Types * BCN na ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BCN Nanotube
BCN may refer to: Places * Barcelona El Prat Airport, IATA code * an abbreviation for the city of Barcelona * Port of Barcelona, by shortened form of the UN/LOCODE ESBCN without the country prefix * Baja California, geographical ISO 3166 code MX-BCN * Birmingham Canal Navigations, a network of the English canal system in Birmingham, Wolverhampton Companies and organizations * Bird Conservation Nepal, a bird conservation organization founded in 1982 in Nepal. * BCN Competicion, a Spanish Formula 3000/GP2 Series motorsport team bought by Ocean Racing Technology in 2008 * Broadcasting Corporation of Newfoundland, public radio service of Newfoundland prior to absorption into the Canadian Broadcasting Corporation in 1949 * Broadcasting Corporation of Niue, government-owned broadcaster operating Niue's only television and radio channels * Library of Congress of Chile () * Rinker School of Building Construction at the University of Florida, formerly abbreviated BCN Publications and lit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tungsten(IV) Sulfide
Tungsten disulfide is an inorganic chemical compound composed of tungsten and sulfur with the chemical formula WS2. This compound is part of the group of materials called the transition metal dichalcogenides. It occurs naturally as the rare mineral ''tungstenite''. This material is a component of certain catalysts used for hydrodesulfurization and hydrodenitrification. WS2 adopts a layered structure similar, or isotypic with MoS2, instead with W atoms situated in trigonal prismatic coordination sphere (in place of Mo atoms). Owing to this layered structure, WS2 forms non-carbon nanotubes, which were discovered after heating a thin sample of WS2 in 1992. Structure and physical properties Bulk WS2 forms dark gray hexagonal crystals with a layered structure. Like the closely related MoS2, it exhibits properties of a dry lubricant. Although it has long been thought that WS2 is relatively stable in ambient air, recent reports on the ambient air oxidation of monolayer WS2 hav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Non-carbon Nanotube
A non-carbon nanotube is a cylindrical molecule often composed of metal oxides, or group 13-Nitrides, such as BN, AlN, GaN and morphologically similar to a carbon nanotube. Non-carbon nanotubes have been observed to occur naturally in some mineral deposits. A few years after Linus Pauling mentioned the possibility of curved layers in minerals as early as 1930, some minerals such as white asbestos (or chrysotile) and imogolite were actually shown to have a tubular structure. However, the first synthetic non-carbon nanotubes did not appear until Reshef Tenne ''et al.'' reported the synthesis of nanotubes composed of tungsten disulfide (WS2) in 1992. In the intervening years, nanotubes have been synthesised of many non-carbon materials, such as vanadium oxide and manganese oxide, and are being researched for such applications as redox catalysts and cathode materials for batteries. History and occurrence Non-carbon nanotubes are morphologically similar to carbon nanotubes an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Silicon Nanotube
Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid (sometimes considered a non-metal) and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive. Silicon is a significant element that is essential for several physiological and metabolic processes in plants. Silicon is widely regarded as the predominant semiconductor material due to its versatile applications in various electrical devices such as transistors, solar cells, integrated circuits, and others. These may be due to its significant band gap, expansive optical transmission range, extensive absorption spectrum, surface roughening, and effective anti-reflection coating. Because of its high chemical affinity for oxygen, it was not until 1823 that Jöns Jakob Berzelius was first able to prepare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallium Nitride Nanotube
Gallium is a chemical element; it has symbol Ga and atomic number 31. Discovered by the French chemist Paul-Émile Lecoq de Boisbaudran in 1875, elemental gallium is a soft, silvery metal at standard temperature and pressure. In its liquid state, it becomes silvery white. If enough force is applied, solid gallium may fracture conchoidally. Since its discovery in 1875, gallium has widely been used to make alloys with low melting points. It is also used in semiconductors, as a dopant in semiconductor substrates. The melting point of gallium, , is used as a temperature reference point. Gallium alloys are used in thermometers as a non-toxic and environmentally friendly alternative to mercury, and can withstand higher temperatures than mercury. A melting point of , well below the freezing point of water, is claimed for the alloy galinstan (62–95% gallium, 5–22% indium, and 0–16% tin by weight), but that may be the freezing point with the effect of supercooling. Gal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
