TITLE

Fermi electron wave packet interference images on carbon nanotubes at room temperature

AUTHOR(S)
Hassanien, A.; Tokumoto, M.; Umek, P.; Mihailovic, D.; Mrzel, A.
PUB. DATE
February 2001
SOURCE
Applied Physics Letters;2/5/2001, Vol. 78 Issue 6, p808
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We report on the structure and electronic properties of single wall carbon nanotubes tips with atomically spatial resolution. Scanning tunneling microscopy shows topographic images of closed tips with a variety of geometrical structure; these include round, conical, as well as tips with a messy shape. Standing wave pattern of the charge density is observed at the tube cap which is formed due to constructive interference between the electronic states and its reflection on the nanotube tips. Atomically resolved images show asymmetry in the charge density that decay out within 6 nm away from the cap. These distinctive tip states do not exist elsewhere on the tube and are related to the presence of topological defects at tube ends. © 2001 American Institute of Physics.
ACCESSION #
4710289

 

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