Hysteresis during isothermal scanning through the gas-liquid transition of carbon dioxide confined in nanometer pores

Scanning hysteresis behaviour at the gas-liquid transition of CO 2 confined in pores of average diameter ∼ 40 Å has been studied by positronium annihilation spectroscopy. Closer inspection of positron 2γ annihilation reveals a significant difference on increasing and decreasing the pressure through...

Full description

Saved in:
Bibliographic Details
Published in:Physics letters. A 1995-08, Vol.204 (3), p.285-290
Main Authors: Wilkinson, N.J., Duffy, J.A., Fretwell, H.M., Alam, M.A.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Scanning hysteresis behaviour at the gas-liquid transition of CO 2 confined in pores of average diameter ∼ 40 Å has been studied by positronium annihilation spectroscopy. Closer inspection of positron 2γ annihilation reveals a significant difference on increasing and decreasing the pressure through the transition, which is explained in terms of a larger liquid-gas interface on pore filling. The results favour the network model as the origin of the observed hysteresis.
ISSN:0375-9601
1873-2429
DOI:10.1016/0375-9601(95)00475-I