Contact metallization of carbon nanotubes

摘要

In one embodiment, SWNTs are synthesized from an embedded catalyst in a modified porous anodic alumina (PAA) template. Pd is electrodeposited into the template to form nanowires that grow from an underlying conductive layer beneath the PAA and extend to the initiation sites of the SWNTs within each pore. Individual vertical channels of SWNTs are created, each with a vertical Pd nanowire back contact. Further Pd deposition results in annular Pd nanoparticles that form on portions of SWNTs extending onto the PAA surface. Two-terminal electrical characteristics produce linear I-V relationships, indicating ohmic contact in the devices.

主权项

1. A method of metallizing an array of carbon nanotubes, comprising:
fabricating a template including a base conducting layer, a first layer of a material on top of the conductive layer, a second layer of catalytic material on top of the first layer, and a third layer of the material on top of the second layer; forming a plurality of pores in the first, second, and third layers; synthesizing at least one carbon nanotube from the catalytic layer in each of a plurality of pores; placing the porous template in a solution containing metallic ions after said synthesizing; and electrodepositing a quantity of metal in each of the plurality of pores sufficient to establish electrical contact from the nanotube to the conductive material.