| Issue |
Europhys. Lett.
Volume 35, Number 9, September III 1996
|
|
|---|---|---|
| Page(s) | 719 - 724 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1996-00175-8 | |
| Published online | 01 September 2002 | |
Dynamics of H-bonded liquids confined to nanopores
Universität Leipzig, Fakultät für Physik - 04103 Leipzig, Germany
Received:
24
April
1996
Accepted:
1
August
1996
Broad-band dielectric spectroscopy (
–
) is employed to
study the molecular dynamics of three low-molecular-weight glass-forming
H-bonded liquids being confined in (dielectrically inactive) porous glasses
with pore sizes of 2.5 nm, 5.0 nm and 7.5 nm. From the relaxation time
distribution of the dielectric spectra, a three-layer model is deduced,
consisting of molecules having solid-like, interfacial and bulk-like
dynamics, respectively.
The quantitative analysis of the different contributions shows
that the bulk-like fraction scales with the pore size, the interfacial
and solid-like layers remaining relatively unchanged.
Our results restrict the possible existence of cooperatively rearranging
clusters in the system below nanometer scale.
PACS: 77.22.Gm – Dielectric loss and relaxation / 64.70.Pf – Glass transitions / 61.25.Em – Molecular liquids
© EDP Sciences, 1996
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