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Physical and Electronic Isolation of Carbon Nanotube ConductorsMulti-walled nanotubes are proposed as a method to electrically and physically isolate nanoscale conductors from their surroundings. We use tight binding (TB) and density functional theory (DFT) to simulate the effects of an external electric field on multi-wall nanotubes. Two categories of multi-wall nanotube are investigated, those with metallic and semiconducting outer shells. In the metallic case, simulations show that the outer wall effectively screens the inner core from an applied electric field. This offers the ability to reduce crosstalk between nanotube conductors. A semiconducting outer shell is found not to perturb an electric field incident on the inner core, thereby providing physical isolation while allowing the tube to remain electrically coupled to its surroundings.
Document ID
20020048275
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
OKeeffe, James
(NASA Ames Research Center Moffett Field, CA United States)
Biegel, Bryan
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Solid-State Physics
Meeting Information
Meeting: Semiconductor Research Corporation Graduate Fellowship Program Conference
Location: Dallas, TX
Country: United States
Start Date: September 12, 2001
End Date: September 14, 2001
Sponsors: Semiconductor Research Corp.
Funding Number(s)
PROJECT: RTOP 704-40-32
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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