Separating Metallic and Semiconductor SWNTS with sinusoidal dipole-inducing magnetic fields
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United States of America Patent
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Aug 25, 2015
Grant Date -
Oct 2, 2014
app pub date -
Jun 16, 2014
filing date -
Dec 9, 2009
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Abstract
A process of sorting metallic single wall carbon nanotubes (SWNTs) from semiconducting types by disposing the SWNTs in a dilute fluid, exposing the SWNTs to a dipole-inducing magnetic field which induces magnetic dipoles in the SWNTs so that a strength of a dipole depends on a conductivity of the SWNT containing the dipole, orienting the metallic SWNTs, and exposing the SWNTs to a magnetic field with a spatial gradient so that the oriented metallic SWNTs drift in the magnetic field gradient and thereby becomes spatially separated from the semiconducting SWNTs. An apparatus for the process of sorting SWNTs is disclosed.
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