Conducting properties of a contact between open-end carbon nanotube and various electrodes

Feng Gao, Jianmin Qu, Matthew Yao

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The carbon nanotube (CNT) is becoming a promising candidate as electrical interconnects in nanoscale electronics. This paper reports the electronic structure and the electrical conducting properties at the interface between an open-end single wall CNT (SWCNT) and various metal electrodes, such as Al, Au, Cu, and Pd. A simulation cell consisting of an SWCNT with each end connected to the metal electrode was constructed. A voltage bias is prescribed between the left- and right-electrodes to compute the electronic conductance. Due to the electronic structure, the electron density and local density of states (LDOS) are calculated to reveal the interaction behavior at the interfaces. The first-principle quantum mechanical density functional and non-equilibrium Green's function (NEGF) approaches are adopted to compute the transport coefficient. After that, the voltage-current relation is calculated using the Landauer-Buttiker formalism. The results show that electrons are conducted through the electrode/CNT/electrode two-probe system. The contact electronic resistance is calculated by averaging the values in the low voltage bias regime (0.0 - 0.1 V), in which the voltage current relationship is found to be linear. And the electrical contact conductance of electrode/CNT/electrode system show the electrode-type dependent, however, the amplitude for different electrodes is of the same order.

Original languageEnglish
Title of host publicationProceedings of the ASME International Mechanical Engineering Congress and Exposition 2009, IMECE 2009
Pages165-169
Number of pages5
DOIs
StatePublished - 2010
Event2009 ASME International Mechanical Engineering Congress and Exposition, IMECE2009 - Lake Buena Vista, FL, United States
Duration: 13 Nov 200919 Nov 2009

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings
Volume5

Conference

Conference2009 ASME International Mechanical Engineering Congress and Exposition, IMECE2009
Country/TerritoryUnited States
CityLake Buena Vista, FL
Period13/11/0919/11/09

Fingerprint

Dive into the research topics of 'Conducting properties of a contact between open-end carbon nanotube and various electrodes'. Together they form a unique fingerprint.

Cite this