Nanotube network transistors from peptide-wrapped single-waited carbon nanotubes

Nanotube networks configured as the channels of transistors by pin-point microfluidic deposition of peptide-wrapped unbundled single-walled carbon nanotubes was investigated. The practical potential of this approach as multiple nanotube networks with either metallic or transistor characteristics can be deposited in any given arrangement on a substrate. Casting from solution was also used to produce networks of interconnected multi-walled carbon nanotubes. Semiconductor devices by the precise deposition of carbon nanotube networks as patterned arrays using a liquid handling system were also fabricated. Electrical measurements showed that the network behaves as a metal or semiconductor depending on the preparation of the nanotube dispersion. It was observed that networks of different composition can be deposited in a controlled manner at specific positions on substrates, offering great flexibility and allowing characterization of multiple networks in a short period of time.