Document Detail


Theoretical and experimental studies of carbon nanotube electromechanical coupling.
MedLine Citation:
PMID:  15245185     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
We present an investigation into electromechanical coupling in carbon nanotubes by focusing on phonon frequency shifts as a result of charge injection. A nearest-neighbor, tight-binding theoretical model is accompanied by a computational explication carried out using the Vienna ab initio simulation package density functional theory code. Raman spectroscopic measurements of the electromechanic couplings under varied but controlled charge injection conditions are also carried out, and the close agreement between the model results and the measured Raman peak shifts suggests that geometrical changes of charged carbon nanotubes previously observed or speculated in different experiments can indeed originate from the simple quantum effects described herein.
Authors:
A Z Hartman; M Jouzi; R L Barnett; J M Xu
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Publication Detail:
Type:  Journal Article     Date:  2004-06-11
Journal Detail:
Title:  Physical review letters     Volume:  92     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-07-12     Completed Date:  2004-07-27     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  236804     Citation Subset:  -    
Affiliation:
Division of Engineering and Department of Physics, Brown University, Box D, Providence, Rhode Island 02912, USA.
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