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4 days ago · Graphene. Not to be confused with Graphite. Graphene is an atomic-scale hexagonal lattice made of carbon atoms. Graphene ( / ˈɡræfiːn / [1]) is an allotrope of carbon consisting of a single layer of atoms arranged in a hexagonal lattice [2] [3] nanostructure. [4] The name is derived from "graphite" and the suffix -ene, reflecting the fact ...
5 days ago · Electron micrograph of a MIL-101 crystal showing its supertetrahedra. Metal–organic frameworks ( MOFs) are a class of porous polymers consisting of metal clusters (also known as SBUs) coordinated to organic ligands to form one-, two-, or three-dimensional structures. The organic ligands included are sometimes referred to as "struts" or ...
2 days ago · Samarium is a chemical element; it has symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually has the oxidation state +3. Compounds of samarium (II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as ...
5 days ago · A perovskite solar cell ( PSC) is a type of solar cell that includes a perovskite-structured compound, most commonly a hybrid organic–inorganic lead or tin halide-based material as the light-harvesting active layer. [1] [2] Perovskite materials, such as methylammonium lead halides and all-inorganic cesium lead halide, are cheap to produce and ...
Apr 11, 2024 · Methadone, sold under the brand names Dolophine and Methadose among others, is a synthetic opioid agonist used for chronic pain and also for opioid use disorder. [7] It is used to treat chronic pain, and it is also used to treat addiction to heroin or other opioids. [10] [11] Prescribed for daily use, the medicine relieves cravings and removes ...
5 days ago · Platinum is a member of the platinum group of elements and group 10 of the periodic table of elements. It has six naturally occurring isotopes. It is one of the rarer elements in Earth's crust, with an average abundance of approximately 5 μg /kg. It occurs in some nickel and copper ores along with some native deposits, mostly in South Africa ...
4 days ago · Uranium is a chemical element; it has symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table. A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons. Uranium radioactively decays, usually by emitting an alpha particle.
