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Hyperfine Interactions

, Volume 56, Issue 1–4, pp 1471–1476 | Cite as

Temperature dependence of the dynamics of ultrafine particles in a polymeric network

  • G. U. Nienhaus
  • A. S. Plachinda
  • M. Fischer
  • V. I. Khromov
  • F. Parak
  • I. P. Suzdalev
  • V. I. Goldanskii
Relaxation Effects Diffusion

Abstract

Simple model systems with pronounced dynamical features will help to get a deeper insight into the complicated dynamics of large molecular networks. We investigated the bounded diffusion of ultrafine Fe(OH)3 particles (∼30 Å in diameter) in the three-dimensional network of the cation exchanger Dowex 50 W which was solvated with a water solution of sucrose (60 wt%). Mössbauer spectra were recorded in the temperature range from 80 K to 305 K. At temperatures above 250 K broad diffusional lines of different widths appear in the spectrum proving the bounded nature of the diffusion. The line widths strongly increase with temperature to values of several hundred mm/s. Around 300 K a large portion of the area escapes even from the largest window of observation used in our experiments (±550 mm/s).

Keywords

Thin Film Sucrose Simple Model Cation Exchanger Dynamical Feature 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1990

Authors and Affiliations

  • G. U. Nienhaus
    • 1
  • A. S. Plachinda
    • 2
  • M. Fischer
    • 1
  • V. I. Khromov
    • 2
  • F. Parak
    • 1
  • I. P. Suzdalev
    • 2
  • V. I. Goldanskii
    • 2
  1. 1.Institut für Molekulare Biophysik der UniversitätMainzF.R.G.
  2. 2.Institute of Chemical Physics of the USSR Academy of SciencesMoscowUSSR

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