Apparatus, methods, systems and devices for fabricating individual CNT
collimators. Micron size fiber coated CNT samples are synthesized with
chemical vapor deposition method and then the individual CNT collimators
are fabricated with focused ion beam technique. Unfocused electron beams
are successfully propagated through the CNT collimators. The CNT
nano-collimators are used for applications including single ion
implantation and in high-energy physics, and allow rapid, reliable
testing of the transmission of CNT arrays for transport of molecules.