N -type carbon nanotube by alkaline-earth metal Sr doping

Alkaline-earth metal, Sr, was doped on multiwalled carbon nanotubes (MWNTs) by vapor phase reaction method. The tunneling electron microscopy, energy dispersive x ray, and Raman spectroscopy were studied for verifying the Sr doping on MWNT. The temperature-dependent resistivity [ ρ ( T ) ] and therm...

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Bibliographic Details
Published in:Journal of applied physics 2008-05, Vol.103 (9), p.096103-096103-3
Main Authors: Kim, Byung Hoon, Park, Tae Hoi, Baek, Seung Jae, Lee, Dong Su, Park, Seung Joo, Kim, Jun Sung, Park, Yung Woo
Format: Article
Language:English
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Summary:Alkaline-earth metal, Sr, was doped on multiwalled carbon nanotubes (MWNTs) by vapor phase reaction method. The tunneling electron microscopy, energy dispersive x ray, and Raman spectroscopy were studied for verifying the Sr doping on MWNT. The temperature-dependent resistivity [ ρ ( T ) ] and thermoelectric power [ S ( T ) ] were also performed for both pristine MWNT and Sr-doped MWNT (Sr-MWNT). ρ ( T ) of Sr-MWNT did not significantly change compared to pristine MWNT. However, S ( T ) of Sr-MWNT considerably changes, i.e., it shows n -type behavior in contrast to pristine MWNT.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.2913170