Capillary Filling of Anodized Alumina Nanopore Arrays

Details Capillary Filling of Anodized Alumina Nanopore Arrays Capillary Filling of Anodized Alumina Nanopore Arrays

2006-12-05

arxiv.org/abs/cond-mat/0612119v1

Phys. Rev. Lett. 97, 175503 (2006)

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 figures, pre-proofs

Scientific paper

10.1103/PhysRevLett.97.175503

The filling behavior of a room temperature solvent, perfluoromethylcyclohexane, in approximately 20 nm nanoporous alumina membranes was investigated in situ with small angle x-ray scattering. Adsorption in the pores was controlled reversibly by varying the chemical potential between the sample and a liquid reservoir via a thermal offset, $\Delta$T. The system exhibited a pronounced hysteretic capillary filling transition as liquid was condensed into the nanopores. These results are compared with Kelvin-Cohan theory, with a modified Derjaguin approximation, as well as with predictions by Cole and Saam.

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