Publication: Capillary Filling of Anodized Alumina Nanopore Arrays
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Date
2006
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American Physical Society
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Alvine, Kyle J., Oleg G. Shpyrko, Peter S. Pershan, Kyusoon Shin, and Thomas P. Russell. 2006. Capillary filling of anodized alumina nanopore arrays. Physical Review Letters 97(175503).
Abstract
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, ΔT. 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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