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Effect of first row transition metals on the conductivity of semiconducting single-walled carbon nanotube networks

Authors :
Feihu Wang
Santanu Sarkar
Mikhail E. Itkis
Irina Kalinina
Elena Bekyarova
Matthew L. Moser
Áron Pekker
Xiaojuan Tian
Robert C. Haddon
Source :
Applied Physics Letters. 100:223111
Publication Year :
2012
Publisher :
AIP Publishing, 2012.

Abstract

We demonstrate the ability of first row transition metals to form electrically conducting interconnects between semiconducting single-walled carbon nanotubes (SWNTs) by constructive rehybridization between sidewall benzene rings as a result of the formation of bis-hexahapto-metal-bonds [(η6-SWNT)M(η6-SWNT)], which bridge adjacent SWNTs. Metal deposition on SWNT films enhances the conductivity by three distinct mechanisms: physisorption of gold leads to the formation of a non-interacting gold film and a monotonic conductivity increase; ionic chemisorption of lithium strongly increases the conductivity due to charge transfer to the SWNTs; covalent chemisorption of first row transition metals leads to an abrupt change in conductivity due to formation of (η6-SWNT)M(η6-SWNT) interconnects.

Details

ISSN :
10773118 and 00036951
Volume :
100
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........839eaf453142cbadfaa8b02ff727c137
Full Text :
https://doi.org/10.1063/1.4723717