Journal
CHEMICAL PHYSICS
Volume 413, Issue -, Pages 116-122Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chemphys.2012.08.018
Keywords
Carbon nanotubes; Graphene; Casimir and van der Waals interactions
Funding
- Department of Energy [DE-FG02-06ER46297]
- DOE [DE-SC0007117]
- Direct For Education and Human Resources
- Division Of Human Resource Development [0833184] Funding Source: National Science Foundation
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The Casimir interaction between graphitic nanostructures, such as carbon nanotubes and graphene sheets, is investigated at the quantum mechanical limit (T = 0 K) using a quantum electrodynamical approach for absorbing and dispersive media. It is found that the nanotube/nanotube interaction in a double wall carbon nanotube configuration is profoundly affected by the collective low frequency excitations of individual nanotubes. It is shown that pronounced, low frequency peaks in the nanotube electron energy loss spectra are a main factor contributing to the strength of the intertube attraction. The graphene/graphene force is also investigated. It is obtained that the graphene optical transparency is the main reason for the reduced attraction as compared to the one for perfect metals. This study presents a unified approach for electromagnetic interactions in graphitic nanostructures, which is able to account for their unique electronic and response properties and geometry configurations. (C) 2012 Elsevier B.V. All rights reserved.
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