Voggu, Rakesh and Pal, Shrinwantu and Pati, Swapan K and Rao, C. N. R. (2008) Semiconductor to metal transition in SWNTs caused by interaction with gold and platinum nanoparticles. Journal of Physics: Condensed Matter, 20 . p. 215211.
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Single-walled carbon nanotubes (SWNTs) have been coated with gold and platinum nanoparticles either by microwave treatment or by the click reaction. The Raman spectra of these SWNT–metal nanoparticle composites have been investigated. Analysis of the G bands in the Raman spectra shows an increase in the proportion of metallic SWNTs attached to metal nanoparticles. This conclusion is also supported by the changes observed in the radial breathing mode (RBM) bands. Ab initio calculations reveal that semiconductor–metal transition occurs in SWNTs due to Coulombic charge transfer between the metal nanoparticles and the semiconducting SWNTs.
|Subjects:||Physical Science > Nanophysics|
Material Science > Nanochemistry
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||20 Jan 2009 11:10|
|Last Modified:||20 Jan 2009 11:10|
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