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Modulation of Electronic Properties of Single Wall Carbon Nanotubes by the Presence of an Ionic Shell

Published online by Cambridge University Press:  01 February 2011

Vladimir Dobrokhotov  and
Chris Berven
Vladimir Dobrokhotov
Affiliation:
[email protected] of IdahoDepartment of PhysicsMoscow ID83844-0903United States
Chris Berven
Affiliation:
[email protected], University of Idaho, Department of Physics, Moscow, ID, 83844-0903, United States
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Abstract

We report the change to the band structure of two types of carbon nanotubes due to the presence of an isolated, non-conducting, uniformly charged shell held at a fixed distance above their surfaces. We find that, depending on the chirality of the nanotube, the strain on the lattice causes the dispersion relationships to change. This change can result in a modification of the band structure which can induce a metal-semiconductor transition. We consider these effects as a possible mechanism for heavy-metal ion sensing by functionalized carbon-nanotubes.

Keywords

nanoscalesensorelectrical properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 915: Symposium R – Nanostructured Materials and Hybrid Composites for Gas Sensors and Biomedical Applications , 2006 , 0915-R03-30
Copyright
Copyright © Materials Research Society 2006

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