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Chemical vapor deposition. DC plasma (violet) enhances the growth of carbon nanotubes in a laboratory-scale PECVD (plasma-enhanced chemical vapor deposition) apparatus. Chemical vapor deposition (CVD) is a vacuum deposition method used to produce high-quality, and high-performance, solid materials. The process is often used in the semiconductor ...
Nanocrystalline diamond produced through CVD diamond growth can have a hardness ranging from 30% to 75% of that of single crystal diamond, and the hardness can be controlled for specific applications. Some synthetic single-crystal diamonds and HPHT nanocrystalline diamonds (see hyperdiamond) are harder than any known natural diamond. [70] [72] [73]
Material properties of diamond. Burns above 700 °C in air. Diamond is the allotrope of carbon in which the carbon atoms are arranged in the specific type of cubic lattice called diamond cubic. It is a crystal that is transparent to opaque and which is generally isotropic (no or very weak birefringence).
In diamond, only defects of the following symmetries have been observed thus far: tetrahedral (T d), tetragonal (D 2d), trigonal (D 3d, C 3v), rhombic (C 2v), monoclinic (C 2h, C 1h, C 2) and triclinic (C 1 or C S). [2][4] The defect symmetry allows predicting many optical properties. For example, one-phonon (infrared) absorption in pure ...
Diamond is a solid form of the element carbon with its atoms arranged in a crystal structure called diamond cubic. Diamond as a form of carbon is a tasteless, odourless, strong, brittle solid, colourless in pure form, a poor conductor of electricity, and insoluble in water. Another solid form of carbon known as graphite is the chemically stable ...
WD Lab Grown Diamonds Logo. WD Lab Grown Diamonds is a manufacturer of synthetic chemical vapor deposition (CVD) diamonds, headquartered in the Washington, D.C. area. Founded in 2008, WD produces lab-grown diamonds for distribution under the brands, in addition to creating diamonds for high-tech Advanced Materials applications.
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