Skip to main content
SpringerLink
Log in

Colloidal copper in aqueous solutions: radiation-chemical reduction, mechanism of formation, and properties

  • Published:
Russian Chemical Bulletin Aims and scope

Abstract

Colloidal copper has been obtained by γ-irradiation of aqueous solutions of copper (II) perchlorate in the presence of alcohol and polyethyleneimine (PEI). The sols are spherical particles about 4 nm in diameter, which are quickly oxidized by oxygen or other oxidants. When CuII is not entirely incorporated into the complex with PEI, disproportionation of CuI aqua complexes formed affords the metal, along with Cu2O. Reduction of the PEI complex of CuI by hydrated electrons gives only colloidal copper. The copper ions can be reduced on the surface of silver sols. Optical parameters of the resulting bimetallic particles have been studied. The presence of copper ions leads to broadening of the absorption band associated with the silver sols and shifts it to the UV region, which is due to the transfer of electrons from copper to silver. Three copper monolayers are enough to cause plasmon absorption of colloidal copper.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. B. G. Ershov,Usp. Khim., 1981,50, 2137 [Russ. Chem. Rews., 1981,50 (Engl. Transl.)].

    Google Scholar 

  2. B. G. Ershov, N. L. Sukhov, and M. A. Akinshin,Khim. vysok. energii, 1986,20, 392 [High Energy Chem., 1986,20 (Engl. Transl.)].

    Google Scholar 

  3. B. G. Ershov, E. Janata, M. Michaelis, and A. Henglein,J. Phys. Chem., 1991,95, 8996.

    Google Scholar 

  4. B. G. Ershov, E. Janata, and A. Henglein,Radiat. Phys. Chem., 1992,39, 123.

    Google Scholar 

  5. V. M. Latimer,Okislitel'nye sostoyaniya elementov i ikh potentsialy v vodnykh rastvorakh [Oxidation States of Elements and their Potentials in Aqueous Solutions], In. Lit., Moscow, 1954, 400 (Rus. Transl.).

    Google Scholar 

  6. G. Khyulst,Rasseyanie sveta malymi chastitsami [Light Scattering by Small Particles], In. Lit., Moscow, 1961, 536 (Rus. Transl.).

    Google Scholar 

  7. J. H. Weaver, C. Krafka, D. W. Lynch, and E. E. Koch,Optical Properties of Metals, Karlsruhe, 1981,1, 2.

    Google Scholar 

  8. J. A. Creighton and D. G. Eadon,J. Chem. Soc., Faraday Trans., 1991,87, 3881.

    Google Scholar 

  9. W. T. Doyle,Phys. Rev., 1958,111, 1067.

    Google Scholar 

  10. R. H. Doremus,J. Chem. Phys., 1965,42, 414.

    Google Scholar 

  11. A. Henglein, P. Mulvaney, T. Linnert, and A. Holzwarth,J. Phys. Chem., 1992,96, 2411.

    Google Scholar 

  12. A. Henglein, P. Mulvaney, A. Holzwarth, T. E. Socebee, and A. Fojtic,J. Phys. Chem., 1992,97, 21.

    Google Scholar 

  13. A. Henglein, M. Gutierrez, E. Janata. and B. G. Ershov,J. Phys. Chem., 1992,96, 4598.

    Google Scholar 

  14. B. G. Ershov and A. Henglein,J. Phys. Chem., 1993,97, 3434.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute of Physical Chemistry, Russian Academy of Sciences, 31 Leninsky prosp., 117915, Moscow, Russian Federation

    B. G. Ershov

Authors
  1. B. G. Ershov
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 25–30, January, 1994.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Ershov, B.G. Colloidal copper in aqueous solutions: radiation-chemical reduction, mechanism of formation, and properties. Russ Chem Bull 43, 16–21 (1994). https://doi.org/10.1007/BF00699128

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF00699128

Key words

Search

Navigation