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Published February 2006 | public
Journal Article

Multibranching Carbon Nanotubes via Self-Seeded Catalysts


A novel multibranching carbon nanotube (CNT) structure is synthesized by direct current plasma enhanced chemical vapor deposition. The structure consists of aligned CNTs which have branches of smaller diameters growing aligned along a direction perpendicular to the original CNT. The mechanism of branching is explained in terms of a self-seeding of Ni catalyst which is transferred by sputtering from the original catalyst particles in the backbone CNTs to the walls of those CNTs. It is also shown that the branching induced a large increase in surface area and total nanotube length and can be beneficial in supporting very fine Pt nanoparticles for fuel cell and other catalytic applications. Such an array of Y-junction nanostructures could be useful for the fabrication of a high-density array of nanoelectronics switches and transistors.

Additional Information

© 2006 American Chemical Society. Received October 13, 2005; Revised Manuscript Received December 5, 2005. Publication Date (Web): January 14, 2006. We acknowledge support of the work by NSF NIRTs under Grant Numbers DMI-0210559 and DMI-0303790 and the University of California Discovery Fund under Grant No. ele02-10133/Jin. We thank Anthony Neuberger for assistance with sample preparation.

Additional details

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October 20, 2023