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Copper(I) selenide

Chemical compound From Wikipedia, the free encyclopedia

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Copper(I) selenide is an inorganic binary compound between copper and selenium, with the chemical formula Cu2Se.[2]

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Properties

Stoichiometric copper selenide is a zero-bandgap material with metal-like behavior.[3] Copper-deficient Cu2−xSe (non-stoichiometric) is an intrinsic p-type semiconductor with direct and indirect bandgap energies in the range of 2.1–2.3 eV and 1.2–1.4 eV respectively.[4] It is frequently grown as nanoparticles or other nanostructures.[5][6][7]

Uses

Copper(I) selenide is produced in situ to form a protective black coating on iron or steel parts in some cold-bluing processes.[8] Bluing solutions that operate in this manner will typically be labeled as containing selenous acid or selenium dioxide.[9][10] It has also been investigated for use in the treatment of colon cancer.[6]

Natural occurrences

Copper selenides are the most common selenium minerals. Cu2Se occurs as two polymorphs: berzelianite[11] (isometric, more common) and bellidoite (tetragonal). There are more natural Cu selenides to date, including umangite, Cu3Se2 and athabascaite, Cu5Se4.[12]

See also

References

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