Freezing and melting transitions of liquids in mesopores with ink-bottle geometry

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dc.identifier.uri Khokhlov, Alexey Valiullin, Rustem Kaerger, Joerg Steinbach, Frank Feldhoff, Armin 2017-04-06T07:29:17Z 2017-04-06T07:29:17Z 2007
dc.identifier.citation Khokhlov, Alexey; Valiullin, Rustem; Kaerger, Joerg; Steinbach, Frank; Feldhoff, Armin: Freezing and melting transitions of liquids in mesopores with ink-bottle geometry. In: New Journal of Physics 9 (2007), 272. DOI:
dc.description.abstract Freezing and melting behavior of nitrobenzene in mesoporous silicon with different pore size and with different porous structure have been studied using H-1 NMR cryoporometry. With the bulk phase surrounding the porous monoliths, in materials with uniform channel-like pores distinct pore-size-dependent freezing and melting transitions have been measured. These data were further used for the analysis of the fluid behavior in samples with modulated porous structure, namely linear pores with alternating cross-section. We have, in particular, considered two materials consisting of channel sections, which were separated by almost identical channel `necks' but notably differed in the respective channel diameters. In the smaller channel segments, the observed shift in the freezing temperature provides direct evidence of the relevance of a pore-blocking mechanism, i.e. of the retardation in the propagation of a solid front by the channel necks. In the channel segments with larger diameter, on the other hand, freezing is found to be initiated by homogeneous nucleation. eng
dc.description.sponsorship DFG
dc.language.iso eng
dc.publisher Bristol : IOP Publishing Ltd.
dc.relation.ispartofseries New Journal of Physics 9 (2007)
dc.rights CC BY-NC-SA 3.0 Unported
dc.subject nuclear-magnetic-resonance eng
dc.subject density-functional theory eng
dc.subject monte-carlo-simulation eng
dc.subject cage-like pores eng
dc.subject porous silicon eng
dc.subject phase-transitions eng
dc.subject molecular-dynamics eng
dc.subject cylindrical pore eng
dc.subject water eng
dc.subject blocking eng
dc.subject.ddc 530 | Physik ger
dc.title Freezing and melting transitions of liquids in mesopores with ink-bottle geometry
dc.type article
dc.type Text
dc.relation.essn 1367-2630
dc.bibliographicCitation.volume 9
dc.bibliographicCitation.firstPage 272
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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