Authors: Y. Maruyama, K. Ikeda, K. Suzuki, T. Yoshikawa, T. Kato and M. Iijima
Affilation: Hosei University, Japan
Pages: 152 - 153
Keywords: STM/STS, carbon nanotube, C60, DNA
The electronic structures of individual carbon nanotubes in a bundle are characterized by STM/STS technique. It is statistically found that the tubes with the same character tend to be assembled in one bundle and its character in different bundles is rather different. Spatially resolved STM/STS measurements on rubidium-doped C60 thin films reveal the origin of the metallic character in this compound. It is found that the new electron density of state emerges around the Fermi-level in the intermolecular sites tunneling spectra. The correlation of the charge-carrier migration and the electron-density of state spectrum in a DNA molecule is studied with spatially resolved STM/STS technique. The observed spectra are consistent with the predictions by bio-chemical methods.