Topic:   Doping strategy of carbon nanotubes

Speaker: Prof. Yong Hee Lee

                  Department of Physics, Center for Nanotubes and Nanostructured Composites,

                  Sungkyunkwan Advanced Institute of nanotechnology,

                  Sungkyunkwan University, Suwon 440-746, Korea

Time:  14:-16:30, 1 Dec. 2008

Location: Rm 403, R & D Building, IMR CAS

Welcome to attend!

Abstract:

The electronic structures of carbon nanotubes are governed strongly on the diameter and chirality. Since the nanotubes are exposed to the surface, electronic structures are expected to be severely modified by environment such as solvent and adsorbates. Various dispersants and solvents have been utilized to disperse carbon nanotubes. Yet, the effect of solvent and adsorbates to the electronic structures of carbon nanotubes has been rarely investigated. In general, a charge transfer between adsorbates and carbon nanotubes occurs, therefore modifying the electronic structures of carbon nanotubes. By precisely understanding the charge transfer mechanism, one may engineer carbon nanotubes to be suitable for many applications in electronic devices such as transistors and transparent conducting films. We will discuss the effect of solvent and a method of precisely engineering p- and n-type doping. These will be discussed in two-hour lectures.