Experimental Evidence for the Pore Size Dependence of Elastic Properties in a Liquid Adsorbate Confined to Nanopores
Abstract
High Resolution Image Download MS PowerPoint Slide The elasticity of adsorbates is relevant for many applications of porous materials. Theoretical studies predict a pronounced increase of elastic moduli for adsorbates under nanoconfinement, but an experimental confirmation is still missing. Here we present an ultrasonic study on the longitudinal modulus β Ar, ads of liquid argon in porous glass samples with different pore radii between 1.8 and 12.8 nm. The analysis of the measured moduli of empty, β 0, and filled samples, β, reveals that the modulus of the adsorbate, β Ar, ads, increases linearly with the inverse pore radius, 1/ r P, as predicted by theory.
Fields of Study & Subjects
Mesoporous Materials and Catalysis
Nanopore and Nanochannel Transport Studies
Aerogels and thermal insulation
Publication details
- Journal / source
- The Journal of Physical Chemistry Letters
- Publisher
- American Chemical Society (ACS)
- Volume
- 17
- Issue
- 6
- Pages
- 1640–1646
- Publication date
- 28 January 2026
- Language
- EN