Patent ID: 9517938
Filing Date: 2016-12-13
CPC Classification: B03C,B82Y,C01B,Y10S

Claim Text:
1. A process of sorting metallic single wall carbon nanotubes (SWNTs) from semiconducting SWNTs, comprising: A. disposing the metallic SWNTs and the semiconducting SWNTs in a dilute fluid; B. applying a varying dipole-inducing magnetic field to the metallic SWNTs and the semiconducting SWNTs in the dilute fluid, including varying the dipole-inducing magnetic field with time so as alternately increase the dipole-inducing magnetic field with time and decrease the dipole-inducing magnetic field with time, and in which the applying a varying dipole-inducing magnetic field includes: C. applying a spatial gradient magnetic field to the metallic SWNTs and the semiconducting SWNTs in the dilute fluid, including: i. providing an upper gradient electromagnetic coil and a lower gradient magnetic coil; ii. applying to the upper gradient electromagnetic coil a current with a sinusoidal profile waveform; and iii. applying to the lower gradient electromagnetic coil a current with a sinusoidal profile waveform that is opposite the sinusoidal profile waveform of the current in the upper gradient electromagnetic coil.