For
Online Viewing (1.5 Mb)
191. Abstract -
Extremely large carbon tubes, some exceeding 5 m in diameter, were
produced with both laser and electric arc techniques using graphite, a
transition metal catalyst, and a reactive third-body gas. We have named
these structures carbon megatubes. They are the first carbonaceous tubes
large enough to observe using optical microscopy. We also report the synthesis
of what we believe to be the first self-assembled branched nanotubes. In
addition to their extreme diameters and unique morphologies, X-ray photoelectron
spectroscopy has shown that these tubes also contain a significant amount
of nitrogen atom incorporation into the graphite lattice. Subsequently,
these nitrogen functionalities were shown to interact with rhenium pentacarbonyl
bromide and serve as anchor points to tether molecules to the surface of
the tubules.
Up
to the 2001 Publications Page
Up
to Publication Listing Page
Last modified April 29, 2008
This document is maintained by R.
Malcolm Brown, Jr.