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Theory of Transport of Long Polymer Molecules through Carbon Nanotube ChannelsA theory of transport of long chain polymer molecules through carbon nanotube (CNT) channels is developed using Fokker-Planck equation and direct molecular dynamics (MD) simulations. The mean transport or translocation time tau is found to depend on the chemical potential energy, entropy and diffusion coefficient. A power law dependence tau approx. N(sup 2)is found where N is number of monomers in a molecule. For 10(exp 5)-unit long polyethylene molecules, tau is estimated to be approx. 1micro-s. The diffusion coefficient of long polymer molecules inside CNTs, like that of short ones, are found to be few orders of magnitude larger than in ordinary silicate based zeolite systems.
Document ID
20030066215
Acquisition Source
Ames Research Center
Document Type
Other
Authors
Wei, Chenyu
(NASA Ames Research Center Moffett Field, CA, United States)
Srivastava, Deepak
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 21, 2013
Publication Date
August 19, 2003
Subject Category
Atomic And Molecular Physics
Funding Number(s)
CONTRACT_GRANT: AS-03
CONTRACT_GRANT: DTT559-99-D-00437
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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