Fig. 4
From: Reliable Diameter Control of Carbon Nanotube Nanobundles Using Withdrawal Velocity
Mechanism of individual CNT assembly into a CNT nanobundle on a tungsten tip under an asymmetric alternating current (AC) electric field. a CNTs were are dispersed in a CNT suspension. b The dispersed CNTs migrate to around the tip apex due to the non-uniform electric field generated by a positive dielectrophoresis (DEP) force. c When the tungsten tip is pulled out from the CNT suspension, capillary compression at the liquid–air interface makes thin wires. d The applied forces acting on the CNTs at the liquid–air interface