Chemistry:Copper selenide

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Copper selenide
Names
IUPAC name
Copper Selenide
Identifiers
3D model (JSmol)
EC Number
  • 243-796-7
UNII
Properties
Cu2Se
Molar mass 206.063 g·mol−1
Appearance Dark blue, black
Density 6.84 g/mL[1]
Hazards
GHS pictograms GHS06: ToxicGHS08: Health hazardGHS09: Environmental hazard
GHS Signal word Danger
H201, H331, H373, H410
P260, P261, P264, P270, P271, P273, P301+310, P304+340, P311, P314, P321, P330, P391, P403+233, P405, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Copper selenide is an inorganic binary compound between copper and selenium. The chemical formula depends on the ratio between the two elements, such as CuSe or Cu2Se.

The crystalline structure and electronic behavior is determined by its elemental composition.[2] 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 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. CuSe is known in mineralogy as klockmannite,[11] while Cu2Se occurs as two polymorphs, berzelianite[12] (isometric, more common) and bellidoite (tetragonal). There are more natural Cu selenides to date, including umangite, Cu3Se2 and athabascaite, Cu5Se4.[13]

See also

References

  1. ↑ "Copper (I) selenide". Sigma-Aldrich. http://www.sigmaaldrich.com/catalog/product/aldrich/481629?lang=en&region=US. 
  2. ↑ Lanling, Zhao; Wang, Xiaolin; F. Yun, Frank (5 February 2015). "The Effects of Te2− and I− Substitutions on the Electronic Structures, Thermoelectric Performance, and Hardness in Melt-Quenched Highly Dense Cu2-xSe". Advanced Electronic Materials 1 (3). doi:10.1002/aelm.201400015. https://onlinelibrary.wiley.com/doi/abs/10.1002/aelm.201400015. Retrieved 28 June 2021. 
  3. ↑ Tyagi, Kriti; Gahtori, Bhasker (June 2015). "Enhanced thermoelectric performance of spark plasma sintered copper-deficient nanostructured copper selenide". Journal of Physics and Chemistry of Solids 81: 100–105. doi:10.1016/j.jpcs.2015.01.018. Bibcode: 2015JPCS...81..100T. https://www.sciencedirect.com/science/article/abs/pii/S0022369715000293. 
  4. ↑ C. Singh, Subhash (September 2018). "Structural and compositional control in copper selenide nanocrystals for light-induced self-repairable electrodes". Nano Energy 51: 774–785. doi:10.1016/j.nanoen.2018.07.020. PMID 30177955. 
  5. ↑ Xiao, Guanjun; Ning, Jiajia; Liu, Zhaoyang; Sui, Yongming; Wang, Yingnan; Dong, Qingfeng; Tian, Wenjing; Liu, Bingbing et al. (2012). "Solution synthesis of copper selenide nanocrystals and their electrical transport properties" (in en). CrystEngComm 14 (6): 2139. doi:10.1039/c2ce06270d. 
  6. ↑ 6.0 6.1 Hessel, Colin M.; Pattani, Varun P.; Rasch, Michael; Panthani, Matthew G.; Koo, Bonil; Tunnell, James W.; Korgel, Brian A. (2011-05-10). "Copper Selenide Nanocrystals for Photothermal Therapy" (in EN). Nano Letters 11 (6): 2560–2566. doi:10.1021/nl201400z. PMID 21553924. Bibcode: 2011NanoL..11.2560H. 
  7. ↑ Patidar, D.; Saxena, N. S. (2012-03-15). "Characterization of single phase copper selenide nanoparticles and their growth mechanism". Journal of Crystal Growth 343 (1): 68–72. doi:10.1016/j.jcrysgro.2012.01.026. Bibcode: 2012JCrGr.343...68P. 
  8. ↑ "Room Temperature Black Oxide". http://www.epi.com/c/black-oxide/steel/room-temperature-black-oxide. 
  9. ↑ "Insta-Blak 333 MSDS". http://mobile.epi.com/doc/black-oxide/Insta-Blak-333-MSDS.pdf. 
  10. ↑ "Oxpho-Blue MSDS". http://www.brownells.com/userdocs/MSDS/082-024-004_OXPHO%20BLUE%20LIQUID,%204%20OZ.%20-%20083_default.pdf. 
  11. ↑ Berry, L. G. (1954). "The crystal structure of covellite, cuse and klockmannite, cuse". American Mineralogist 39 (5–6): 504–509. https://pubs.geoscienceworld.org/msa/ammin/article-abstract/39/5-6/504/539369. 
  12. ↑ Harris, D. C.; Cabri, L. J.; Murray, E. J. (1970). "An occurrence of a sulphur-bearing berzelianite". The Canadian Mineralogist: 737–740. http://rruff.info/uploads/CM10_737.pdf. 
  13. ↑ Harris, D. C.; Cabri, L. J.; Kaiman, S. (1970). "Athabascaite: A New Copper Selenide Mineral from Martin Lake, Saskatchewan". The Canadian Mineralogist 10 (2): 207–215. https://pubs.geoscienceworld.org/canmin/article-abstract/10/2/207/10746/athabascaite-a-new-copper-selenide-mineral-from. 



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