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Russian Chemical Bulletin

, Volume 54, Issue 1, pp 16–30 | Cite as

Condensation route of evolution of nanodispersed substances

  • I. V. Melikhov
  • V. E. Bozhevol’nov
Article

Abstract

Numerous experimental data indicate that nanosystems develop by stages. The evolution route of closed nanosystems includes stages of nanoparticle nucleation, growth, ripening, and agglomeration, and texture and composition ordering. In closed systems, nanodispersed substances occur in the nano-state for a limited period of time, which can be changed by varying the supersaturation of the medium with respect to nanoparticles. Nanoparticles in open systems tend to degrade due to chemical transformations, dissolution, or evaporation and the lifetime of open systems can be estimated. At every stage of development of nanosystems, the rates of variation of the state parameters of nanoparticles fluctuate over a scale much exceeding the molecular scale. The behavior of the set of nanoparticles is described by a Fokker—Planck type equation, which may underlie the formulation of the principal equation of physicochemical evolution of nanosystem.

Key words

nanosystems evolution particle nucleation growth of nanocrystals agglomeration composition and structure ordering Fokker—Planck equation 

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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • I. V. Melikhov
    • 1
  • V. E. Bozhevol’nov
    • 1
  1. 1.Department of ChemistryM. V. Lomonosov Moscow State UniversityMoscowRussian Federation

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