William Marsh Rice University

Honglie Dai

Richard E Smalley

Andreas Thess

Andrew Gabriel Rinzler

Daniel T Colbert

Ting Guo

Jason H Hafner

Jie Liu

Pavel Nikolaev

Kenneth A Smith

This invention relates generally to cutting single-wall carbon nanotubes (SWNT). In one embodiment, the present invention provides for preparations of homogeneous populations of short carbon nanotube molecules by cutting and annealing (reclosing) the nanotube pieces followed by fractionation. The cutting and annealing processes may be carried out on a purified nanotube bucky paper, on felts prior to purification of nanotubes or on any material that contains single-wall nanotubes. In one embodiment, oxidative etching with concentrated nitric acid is employed to cut SWNTs into shorter lengths. The annealed nanotubes may be disbursed in an aqueous detergent solution or an organic solvent for the fractionation. Closed tubes can also be derivatized to facilitate fractionation, for example, by adding solubilizing moieties to the end caps.

Macroscopically manipulable nanoscale devices made from nanotube assemblies

Growing community of inventors

Sunnyvale, CA, United States of America

Honglie Dai