Journal
APPLIED PHYSICS LETTERS
Volume 87, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2144280
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To selectively absorb impact energy, the profiles of sorption isotherms of protection systems must be adjusted in a broad spectrum. In this article, a N-Lauroylsarcosine sodium salt (sarcosyl) of intermediate molecular size is used to control the pressure induced infiltration of a nanoporous silica. The experimental result shows that the infiltration plateau of this system is two-staged; that is, not only the activation pressure but also the infiltration volume can be modified. It is noticed that the sarcosyl molecule demands a free volume to enter a nanopore. The free volume size decreases nearly linearly as the sarcosyl concentration increases. (c) 2005 American Institute of Physics.
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