Mapping the One-Dimensional Electronic States of Nanotube Peapod Structures
D. J. Hornbaker,1
S.-J. Kahng,1*
S. Misra,1
B. W. Smith,2
A. T. Johnson,34
E. J. Mele,34
D. E. Luzzi,24
A. Yazdani1
Arrays of C60 molecules nested inside
single-walled nanotubes represent a class of nanoscale materials having
tunable properties. We report electronic measurements of this system
made with a scanning tunneling microscope and demonstrate that
the encapsulated C60 molecules modify the local
electronic structure of the nanotube. Our measurements and calculations
also show that a periodic array of C60 molecules gives rise
to a hybrid electronic band, which derives its character from both the
nanotube states and the C60 molecular orbitals.
1 Department of Physics and Frederick Seitz
Materials Research Laboratory, University of Illinois at
Urbana-Champaign, Urbana, IL 61801, USA.
2 Department of Materials Science and Engineering,
3 Department of Physics and Astronomy,
4 Laboratory for Research on the Structure of
Matter, University of Pennsylvania, Philadelphia, PA 19104, USA.
*
Present address: Department of Physics, Soongsil University,
Seoul, Korea.
To whom correspondence should be addressed. E-mail:
ayazdani{at}uiuc.edu
