Selenide


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selenide

[′sel·ə‚nīd]
(inorganic chemistry)
M2Se A binary compound of divalent selenium, such as Ag2Se, silver selenide.
(organic chemistry)
An organic compound containing divalent selenium, such as (C2H5)2Se, ethyl selenide.

Selenide

 

any of the chemical compounds formed with selenium and metals. Selenides are analogues of sulfides and tellu-rides. They are obtained by, for example, the direct reactions of elements, the reactions of metals and corresponding oxides with H2Se, and the action of H2Se on solutions of metal salts. Normal selenides and polyselenides are known, the former being more stable. Selenides of the transition elements of groups IV-VIII and of the lanthanides and actinides form chemically stable, refractory (melting points 2000°–2500°C) compounds.

Selenides of metals belonging to the zinc subgroup are primarily used in resistors and photoelectric cells. Gallium selenides are used in laser technology and nonlinear optics. The selenides of transition metals can be used in high-temperature semiconductor devices; diselenides of molybdenum and tungsten serve as solid lubricants in the friction points of machines. Organic selenides are also known.

REFERENCES

Chizhikov, D. M., and V. P. Schastlivyi. Selen i selenidy. Moscow, 1964.
Obolonchik, V. A. Selenidy. Moscow, 1972.
Medvedeva, Z. S. Khal’kogenidy elementov III B podgruppy periodicheskoi sistemy. Moscow, 1968.
References in periodicals archive ?
This extremely large thermoelectric effect is related to a phase transition or re-arrangement of the crystal structure of tin selenide. The crystal structure of tin selenide consists of many layers, similar to filo or puff pastry.
Khan, "Preparation and properties of indium selenide (InSe) thin films for selective surface applications," Journal of Physical Science and Application, vol.
Sanyal, "Solvothermal synthesis of bismuth selenide nanotubes," Materials Letters, vol.
The team then restricted blood flow to one of the animals' hind limbs and observed a significant increase in selenide in the injured limb after blood flow was restored in comparison with the untreated hind limb.
In the early 2000s, a series of papers showed how quantum dots made with cadmium selenide could actually kill cells in a petri dish.
QD technology based materials cover cadmium selenide, cadmium sulphide, cadmium telluride, indium arsenide, graphene, and silicon.
[23] used a nucleophilic substitution reaction of pure sodium selenide with chloro-derivative 2 to prepare the selenoether in 55% yield.
The topics include structural and thermal properties of copper-doped nanocrystalline tin selenide, fabricating and applying thin film semiconductor sensors for detecting volatile organic compounds, temperature dependence in the electron-impurity scattering rate in doped bilayer graphene, an optical adsorption study of molybdenum diselenide and polyaniline and their use in hybrid solar cells, and preparing and characterizing polymer blends of ethyl cellulose and its composites.
The biggest name in solar shingles is Dow's Powerhouse line, which uses cutting edge Copper Indium Gallium Selenide solar cells (aka "thin-film" solar) to turn sunlight into electricity via a supplied inverter box.
4:15 SIZE DEPENDENT STUDY OF CADMIUM SELENIDE QUANTUM DOTS FABRICATED BY PHOTOLITHOGRAPHY **, Volker Beutner *, Raghuveer R Gadipalli.
Brutchey and David Webber, a postdoctoral researcher at the university, developed a surface coating for the nanocrystals, which are made of the semiconductor cadmium selenide. In the past, organic molecules were attached to the nanocrys tals to keep them stable and to prevent them from sticking together.
Cadmium selenide quantum dots are among the most studied, with potential applications not only in medicine, but as components of solar cells, quantum computers, light-emitting diodes and more.