Carbon nanotube-based electronic devices made by electrolytic deposition and applications thereof

A semiconducting device, comprising:

• a substrate;
• at least one pair of electrodes disposed on the substrate, wherein one or more pairs of electrodes are connected to a power source;
• and
• a bundle of carbon nanotubes disposed between the at least one pair of electrodes wherein said bundle consists essentially of semiconductive carbon nanotubes.

A semiconducting device, comprising:

• a substrate;
• at least one pair of electrodes disposed on the substrate, wherein one or more pairs of electrodes are connected to a power source;
• and
• a bundle of carbon nanotubes disposed between the at least one pair of electrodes wherein said bundle consists of one or more semiconductive carbon nanotubes and one or more electrically isolated metallic carbon nanotubes.

A method of forming a semiconductor device, comprising the steps of:

• providing a substrate comprising two electrodes wherein the two electrodes are connected to a power supply;
• providing a solvent comprising a plurality of semiconducting carbon nanotubes and a plurality of metallic carbon nanotubes;
• submersing the substrate in the solvent wherein the plurality of semiconducting carbon nanotubes and plurality of metallic carbon nanotubes form a carbon nanotube bundle disposed between the two electrodes;
• and
• ramping a bias voltage across the two electrodes wherein the ramping of the bias voltage removes the plurality of metallic carbon nanotubes in an amount sufficient to form the semiconducting device.