Method, arrangement and use of an arrangement for separating metallic carbon nanotubes from semi-conducting carbon nanotubes
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United States of America Patent
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Jan 9, 2007
Grant Date -
Nov 30, 2006
app pub date -
Apr 2, 2004
filing date -
Apr 8, 2003
priority date (Note) -
Expired
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Abstract
A method for separating metallic carbon nanotubes and semi-conducting carbon nanotubes includes providing a suspension containing a plurality of individual metallic carbon nanotubes and semi-conducting carbon nanotubes in a liquid, for which the dielectric constant .epsilon..sub.L meets the requirement: .epsilon..sub.M>.epsilon..sub.L>.epsilon..sub.H, wherein .epsilon..sub.M is the dieletric constant of the metallic carbon nanotubes and .epsilon..sub.H is the dielectric constant of the semi-conducting carbon nanotubes. A a non-homogeneous electric alternating field is applied to the suspension to create spatially separate species of the metallic carbon nanotubes and the semi-conducting carbon nanotubes. At least one of the separate species is then removed.
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