6533b862fe1ef96bd12c7585
RESEARCH PRODUCT
Temperature dependence of the dynamics of ultrafine particles in a polymeric network
G. U. NienhausV. I. GoldanskiiFritz G. ParakA. S. PlachindaI. P. SuzdalevM. FischerV. I. Khromovsubject
Nuclear and High Energy PhysicsSIMPLE (dark matter experiment)Ion exchangeChemistryDiffusionDynamics (mechanics)Analytical chemistryAtmospheric temperature rangeCondensed Matter PhysicsAtomic and Molecular Physics and OpticsCrystallographyBounded functionUltrafine particlePhysical and Theoretical ChemistryLine (formation)description
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 A 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%). Mossbauer 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).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-07-01 | Hyperfine Interactions |