The inner shell influence on the electronic structure of double-walled carbon nanotubes

Yann Tison (1) , C.E. Giusca , V. Stolojan , Y. Hayashi , S.R.P. Silva

1 IPREM - Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux

Structural and electronic properties of double-walled carbon nanotubes (DWCN) deposited on a gold substrate using both Scanning Tunneling Microscopy (STM) and Scanning Tunneling Spectroscopy (STS) were analyzed. The influence of the inner shell on the electronic structure and the transport properties of DWCNs was also discussed. The structural properties of DWCNs were determined using high resolution transmission electron microscopy (HRTEM) and atomically resolved STM. STS measurements were performed on different locations for more than 10 tubes, and the normalized differential conductance, corresponding to a spectrum of the local density of states was plotted for each tube. Experimental investigations showed that the Van Hove singularities of both the outer and the inner shell could be observed on the normalized differential conductance curves.

Mots clés: Electric conductance; Electronic structure; High resolution transmission electron microscopy; Scanning tunneling microscopy; Differential conductance; Van Hove singularities; Carbon nanotubes

Domaines: Chimie

Yann Tison, C.E. Giusca, V. Stolojan, Y. Hayashi, S.R.P. Silva. The inner shell influence on the electronic structure of double-walled carbon nanotubes. Advanced Materials, 2008, 20 (1), pp.189-194. ⟨10.1002/adma.200700399⟩. ⟨hal-01564405⟩