STM/STS Studies of SWNTs in Bundles,C60 Thin Films and DNA Molecules
Y.Maruyama, K.Suzuki, K.Ikeda, T.Kato and M.Iijima
Hosei University, JP
Keywords: STM/STS, Carbon Nanotube, C60, DNA
1. 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.
2. 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.
3. 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.
NSTI Nanotech 2003 Conference Technical Program Abstract