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Nanoporous Glass as a Model System for a Consistency Check of the Different Techniques of Diffusion Measurement
Author(s) -
Chmelik Christian,
Enke Dirk,
Galvosas Petrik,
Gobin Oliver,
Jentys Andreas,
Jobic Hervé,
Kärger Jörg,
Krause Cordula B.,
Kullmann Jens,
Lercher Johannes,
Naumov Sergej,
Ruthven Douglas M.,
Titze Tobias
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100072
Subject(s) - nanoporous , diffusion , nanometre , materials science , chemical physics , consistency (knowledge bases) , nanotechnology , thermodynamics , chemistry , physics , composite material , computer science , artificial intelligence
The remarkable differences in the guest diffusivities in nanoporous materials commonly found with the application of different measuring techniques are usually ascribed to the existence of a hierarchy of transport resistances in addition to the diffusional resistance of the pore system and their differing influence due to the differing diffusion path lengths covered by the different measuring techniques. We report diffusion measurements with nanoporous glasses where the existence of such resistances could be avoided. Molecular propagation over diffusion path lengths from hundreds of nanometers up to millimeters was thus found to be controlled by a uniform mechanism, appearing in coinciding results of microscopic and macroscopic diffusion measurement.