Multiple-layer conduction and scattering property in multi-walled carbon nanotubes

We present a review of recent fundamental transport research in multi-walled carbon nanotubes (MWNTs). Although carbon nanotubes are showing great promise as nanometre-scale material for advanced device applications, we need a fundamental understanding of the nanotube electrical properties for the conduction mechanism. In particular, MWNT can pass a remarkably high-density current of more than 10⁸Acm^-2 in a few tens of nm order. In the high-density current operation, a current-flow mechanism of the multiple-layer structure in current conduction is not clear. Furthermore, there is an unclear fundamental issue regarding the scattering property of an MWNT. Experimental results related to the basic transport property of the lithographically contacted MWNT are discussed in this paper.