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A Controllable Nanometer‐Sized Valve
Author(s) -
Yu M.,
Falconer J. L.,
Amundsen T. J.,
Hong M.,
Noble R. D.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200602774
Subject(s) - permeation , materials science , hexane , nanometre , membrane , nanostructure , chemical engineering , nanotechnology , analytical chemistry (journal) , chromatography , composite material , chemistry , biochemistry , engineering
The effect of a MFI membrane nanostructure change on n ‐hexane/ 2,2‐dimethylbutane (DMB) permeation is described. The figure shows a) DMB transporting through the defects in an empty membrane, b) DMB permeation is blocked due to the initial defects closing by crystal expansion by n ‐hexane, c) both n ‐hexane and DMB permeation are blocked when the membrane is exposed to DMB first. The pores shrink and trap DMB so that almost all transport is blocked.