Document Detail

Measuring the work function of carbon nanotubes with thermionic method.
MedLine Citation:
PMID:  18225940     Owner:  NLM     Status:  MEDLINE    
The work function of carbon nanotubes might depend on their diameters and the number of walls, and be different for their tips and sidewalls. Here we report the work function measurement of single-walled, double-walled, and multiwalled carbon nanotubes by investigating the thermionic emission from the middle of their bundles. It is found that the sidewall work functions of the three kinds of carbon nanotubes are all around 4.7-4.9 eV; the diameter and the numbers of walls have no obvious influence on their work functions. For the carbon nanotube bundle with some tips appearing in the middle, the measured work function is smaller than without tips, indicating that the work function of tips is smaller than that of the sidewalls. This tip effect also results in a difference in the thermionic emission characteristic, implying non-uniform work function distribution along the bundle.
Peng Liu; Qin Sun; Feng Zhu; Kai Liu; Kaili Jiang; Liang Liu; Qunqing Li; Shoushan Fan
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-01-29
Journal Detail:
Title:  Nano letters     Volume:  8     ISSN:  1530-6984     ISO Abbreviation:  Nano Lett.     Publication Date:  2008 Feb 
Date Detail:
Created Date:  2008-02-14     Completed Date:  2008-04-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088070     Medline TA:  Nano Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  647-51     Citation Subset:  IM    
Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing 100084, China.
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MeSH Terms
Computer Simulation
Electric Conductivity
Materials Testing / methods*
Models, Chemical*
Models, Molecular*
Nanotubes, Carbon / chemistry*
Reg. No./Substance:
0/Nanotubes, Carbon

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