Aligned single-walled carbon nanotube patterns with nanoscale width, micron-scale length and controllable pitch
Abstract
We have successfully aligned single-walled carbon nanotubes (SWNTs) in patterns with nanoscale width, micron-scale length and controllable pitch on SiO2/Si substrates using a poly(dimethysiloxane) (PDMS) microchannel mold. The microchanneled mold was patterned with a funnel-shaped channel to minimize nanotube jamming during capillary-driven inflow. Two (i.e. pre- and post-capillary) gas blows were employed to improve nanotube alignment. The fluidically pre-aligned carbon nanotubes were 'gas-spun' into a long 20 nm wide pattern, significantly narrower than the fluidic pre-alignment channel. These narrow and long aligned SWNT patterns were successfully transferred to a pair of gold electrodes spaced 15 µm apart. The performance of the carbon nanotube field effect transistor (CNTFET) fabricated by this technique was evaluated.
- Publication:
-
Nanotechnology
- Pub Date:
- November 2007
- DOI:
- 10.1088/0957-4484/18/45/455302
- Bibcode:
- 2007Nanot..18S5302L