Determination of the Intershell Conductance in Multiwalled Carbon Nanotubes

摘要

We report on the intershell electron transport in multiwalled carbon nanotubes (MWNTs). To do this, local and nonlocal four-point measurements are used to study the current path through the different shells of a MWNT. For short electrode separations approx< 1 μm the current mainly flows through the two outer shells, described by a resistive transmission line with an intershell conductance per length of ～(10 kΩ)~(-1)/μm. The intershell transport is tunnel type and the transmission is consistent with the estimate based on the overlap between π orbitals of neighboring shells.