Solidified Fillings of Nanopores

Details Solidified Fillings of Nanopores Solidified Fillings of Nanopores

2005-08-29

arxiv.org/abs/cond-mat/0508683v1

Mater. Res. Soc. Symp. Proc. 876E, R3.1 (2005)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Invited Talk at the MRS Spring Meeting, San Francisco (CA, U.S.A), 2005

Scientific paper

We present a selection of x-ray and neutron 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. He, 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 chain-like 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.

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