] ] Researchers from the Japanese National Institute of ] Advanced Industrial Science and Technology (AIST) have ] added water to the standard method of manufacturing ] carbon nanotubes to produce tall, dense, ] vertically-aligned stands of pure nanotubes. The ] researchers' demonstrations have yielded stands of ] single-wall carbon nanotubes as tall as 2.5 millimeters ] and 99.98 percent pure. Individual nanotubes range from ] one to three nanometers in diameter. ] ] The purity of the nanotubes makes the usual post-growth ] purification process unnecessary. This makes the method ] quicker, less expensive and less likely to damage the ] nanotubes than existing processes, said Kenji Hata, a ] senior researcher at the Japan National Institute of ] Advanced Industrial Science and Technology. Nanotubes ] produced using the method are orderly and pure enough for ] use in many fields, including biology, medical implants, ] chemistry, electronics and magnetics research, he said. For pure nanotubes add water TRN 120104 |