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Ballistic and non-ballistic gas flow through ultrathin nanopores.
MedLine Citation:
PMID:  22433182     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We show that ultrathin porous nanocrystalline silicon membranes exhibit gas permeance that is several orders of magnitude higher than other membranes. Using these membranes, gas flow obeying Knudsen diffusion has been studied in pores with lengths and diameters in the tens of nanometers regime. The components of the flow due to ballistic transport and transport after reflection from the pore walls were separated and quantified as a function of pore diameter. These results were obtained in pores made in silicon. We demonstrate that changing the pore interior to carbon leads to flow enhancement resulting from a change in the nature of molecule-pore wall interactions. This result confirms previously published flow enhancement results obtained in carbon nanotubes.
Authors:
M N Kavalenka; C C Striemer; D Z Fang; T R Gaborski; J L McGrath; P M Fauchet
Publication Detail:
Type:  Journal Article     Date:  2012-03-21
Journal Detail:
Title:  Nanotechnology     Volume:  23     ISSN:  1361-6528     ISO Abbreviation:  Nanotechnology     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-03-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101241272     Medline TA:  Nanotechnology     Country:  England    
Other Details:
Languages:  eng     Pagination:  145706     Citation Subset:  IM    
Affiliation:
Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY 14627, USA.
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