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Solidified Fillings of Nanopores

Published online by Cambridge University Press:  15 February 2011

Patrick Huber  and
Klaus Knorr
Patrick Huber
Affiliation:
Technische Physik, Universität des Saarlandes, D-66041 Saarbrücken (Germany)
Klaus Knorr
Affiliation:
Technische Physik, Universität des Saarlandes, D-66041 Saarbrücken (Germany)
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Abstract

We present a selection of x-ray diffraction patterns of spherical (He, Ar), dumbbell- (N2, CO), and chain-like molecules (n-C9H20, n-C19H40) solidified in nanopores of silica glass (mean pore diameter 7nm). These patterns allow us to demonstrate how key principles governing crystallization have to be adapted in order to accomplish solidification in restricted geometries. 4He, Ar, and the spherical close packed phases of CO and N2 adjust to the pore geometry by introducing a sizeable amount of stacking faults. For the pore solidified, medium-length chainlike n-C19H40 we observe a close packed structure without lamellar ordering, whereas for the short-chain C9H20 the layering principle survives, albeit in a modified fashion compared to the bulk phase.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 876: Symposium A – Nanoporous and Nanostructured Materials for Catalysis, Sensor and Gas Separation Applications , 2005 , R3.1
Copyright
Copyright © Materials Research Society 2005

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