Physical Review Letters 2006-10-27

Capillary filling of anodized alumina nanopore arrays.

Kyle J Alvine, Oleg G Shpyrko, Peter S Pershan, Kyusoon Shin, Thomas P Russell

文献索引：Phys. Rev. Lett. 97(17) , 175503, (2006)

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摘要

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, DeltaT. 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.