ORGN 348 |
| Here we report a new family of discrete nanotubular graphite by self-assembly of an amphiphilic hexa-peri-hexabenzocoronene (HBC) derivative. In sharp contrast with multi-walled carbon nanotubes, our nanotube consists of a graphitic wall formed from a great number of molecular graphene sheets stacked parallel to the longer axis of the tube. The tubular object is characterized by an aspect ratio greater than 1000 and has a uniform, 14 nanometers wide, open-ended hollow space, which is an order of magnitude larger than those of carbon nanotubes. The wall is 3 nanometers thick, consisting of helical arrays of the pi-stacked graphene molecule, whose surfaces are covered by hydrophilic TEG chains. The graphitic nanotube is redox active and electrical conductive. We also succeeded in the fabrication of novel graphitic nanotubes such as those having one-handed helical chirality, crosslinked surfaces by chemical, electrochemical, and photochemical processes, and photoconductivity. |
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Organic Approaches to Nanotechnology
8:00 AM-12:00 PM, Tuesday, 12 September 2006 Moscone Center -- Room 135, Oral
Division of Organic Chemistry |