This title appears in the Scientific Report :
2005
Please use the identifier:
http://dx.doi.org/10.1016/j.molliq.2004.07.070 in citations.
Liquid-gas critical phenomena under confinement: small-angle neutron scattering studis of CO2 in aerogel
Liquid-gas critical phenomena under confinement: small-angle neutron scattering studis of CO2 in aerogel
Small angle neutron scattering (SANS) is a well-established technique for investigating the behavior of confined binary liquid solutions, as it can probe the correlation length and susceptibility in pores on length scales similar to 1-100 nm. We applied SANS to explore the influence of confinement o...
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Personal Name(s): | Melnichenko, Y. B. |
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Wignall, G. D. / Cole, D. R. / Frielinghaus, H. / Bulavin, L. A. | |
Contributing Institute: |
Neutronenstreuung; IFF-INS |
Published in: | Journal of molecular liquids, 120 (2005) S. 7 |
Imprint: |
New York, NY [u.a.]
Elsevier
2005
|
Physical Description: |
7 |
DOI: |
10.1016/j.molliq.2004.07.070 |
Document Type: |
Journal Article |
Research Program: |
Kondensierte Materie |
Series Title: |
Journal of Molecular Liquids
120 |
Subject (ZB): | |
Publikationsportal JuSER |
Small angle neutron scattering (SANS) is a well-established technique for investigating the behavior of confined binary liquid solutions, as it can probe the correlation length and susceptibility in pores on length scales similar to 1-100 nm. We applied SANS to explore the influence of confinement on critical behavior of an individual fluid carbon dioxide (CO2) in a highly porous aerogel. The results demonstrate that quenched disorder induced by aerogel significantly depresses density fluctuations. Despite the negligible volume occupied by aerogel (< 4%), the macroscopic phase separation of confined CO2 into coexisting liquid and gaseous phases is suppressed and below the critical temperature of the bulk fluid frozen methastable microdomains are formed. Experimental data show that critical absorption is as important as the effect of confinement in defining the behavior of confined fluids. (c) 2004 Elsevier B.V. All rights reserved. |