| Issue |
EPL
Volume 79, Number 3, August 2007
|
|
|---|---|---|
| Article Number | 36003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/79/36003 | |
| Published online | 18 July 2007 | |
Heterogeneous relaxation dynamics of nano-confined salol probed by DMA
1
Nonlinear Physics Group, Faculty of Physics of the University of Vienna - Boltzmanngasse 5, A-1090 Wien, Austria
2
Institute for Computer Science, Technical University of Czestochowa - Armii Krajowej 17, PL 42-200 Czestochowa, Poland
Received:
7
December
2006
Accepted:
19
June
2007
We present novel low-frequency (0.1 Hz
50 Hz) measurements of the complex elastic susceptibility of the glass-forming liquid salol confined to nanoporous Vycor glass. Our data can be perfectly interpreted with the assumption of a radial distribution of Vogel-Fulcher temperatures 
inside the pores, resulting from an increase of the molecular relaxation time with decreasing distance from the rough pore surface as recently found by computer simulations (Scheidler et al., Europhys. Lett. 59, 701 (2002)). The results show for the first time, that the dynamic elastic response is extremely sensitive for separating confinement-induced acceleration effects of the molecular dynamics and surface-induced slowing-down due to rough pore interfaces.
PACS: 64.70.Pf – Glass transitions / 61.20.Lc – Time dependent properties; relaxation / 62.25.+g – Mechanical properties of nanoscale materials
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.