Modeling Electronic Properties of Multiwall Carbon Nanotubes Zoheir Kordrostami, 1,2 Mohammad Hossein Sheikhi, 1,2 and Reza Mohammadzadegan 2 1 School of Engineering, Shiraz University, Shiraz, Iran 2 Shiraz Nanotechnology Research Institute, Shiraz, Iran Abstract: Reviewing experimental results and based on the physical reasoning, we present a basic circuit model for Multiwall carbon nanotubes (MWCNTs), which can simulate different experimental results. Investigation of different results confirms the severe effects of fabrication process (nanotube and contacts) on electronic proper- ties of the MWCNTs. The circuit model has been developed to show the performance improvements of a CNT interconnect when the single-wall carbon nanotube (SWCNT) is replaced by an MWCNT. To calculate the current-voltage characteristic and the switching delay of MWCNTs, we have simulated their DC and AC properties, respect- ively, using the developed transmission line models. Based on the physical models, the elements of the circuit model can be changed so that the simulation and the practical measurements for an MWCNT can correspond. Switching Delays of the MWCNTs and SWCNTs are calculated and compared for different cases. Keywords: Multiwall carbon nanotubes, circuit model, conducting channels, switching delay 1 INTRODUCTION Metallic carbon nanotubes have been identified as possible interconnect materials for future integrated circuit technology generations. The major Received 31 July 2007, Accepted 2 November 2007 Address correspondence to Zoheir Kordrostami, Department of Electrical Engineer- ing, School of Engineering, Shiraz University, Shiraz, Iran. E-mail: zkrostami@ shirazu.ac.ir Fullerenes, Nanotubes, and Carbon Nanostructures, 16: 66–77, 2008 Copyright # Taylor & Francis Group, LLC ISSN 1536-383X print/1536-4046 online DOI: 10.1080/15363830701783713 66