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Cover Picture: Nanoporous Glass as a Model System for a Consistency Check of the Different Techniques of Diffusion Measurement (ChemPhysChem 6/2011)
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 - Reports
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201190028
Subject(s) - nanoporous , diffusion , yield (engineering) , brownian motion , materials science , cover (algebra) , consistency (knowledge bases) , chemical physics , nanotechnology , thermodynamics , statistical physics , chemistry , physics , composite material , mathematics , geometry , mechanical engineering , quantum mechanics , engineering
Diffusion, that is, the Brownian motion of guest molecules, is often decisive in the performance of nanoporous host materials in their technological applications. In general, different techniques with differing length scales of observation yield notably differing diffusivities as a consequence of the existence of additional transport resistances acting in addition to the diffusional resistance of the pore space. These resistances are avoided in specially prepared nanoporous glasses, yielding coinciding diffusivities in macroscopic and microscopic measurements, as shown by J. Kärger et al. on p. 1130 .