Wu, Chun-Guey; Bein, Thomas
Conducting Carbon Wires in Ordered, Nanometer-Sized Channels.
In: Science, Vol. 266: pp. 1013-1015
The encapsulation of graphite-type carbon wires in the regular, 3-nanometer-wide hexagonal
channels of the mesoporous host MCM-41 is reported. Acrylonitrile monomers are
introduced through vapor or solution transfer and polymerized in the channels with
external radical initiators. Pyrolysis of the intrachannel polyacrylonitrile results in filaments
whose microwave conductivity is about 10 times that of bulk carbonized polyacrylonitrile.
The MCM host plays a key role in ordering the carbon structure, most likely through the
parallel alignment of the precursor polymer chains in the channels. The fabrication of
stable carbon filaments in ordered, nanometer-sized channels represents an important
step toward the development of nanometer electronics.