Rakesh Voggu et al 2008 J. Phys.: Condens. Matter 20 215211 doi:10.1088/0953-8984/20/21/215211
Semiconductor to metal transition in SWNTs caused by interaction with gold and platinum nanoparticles
Rakesh Voggu1, Shrinwantu Pal1, Swapan K Pati1,2 and C N R Rao1,3
Show affiliationsSingle-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.
- PACS
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64.70.Nd Structural transitions in nanoscale materials
- Subjects
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Condensed matter: electrical, magnetic and optical
- Dates
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Issue 21 (28 May 2008)
Received 12 February 2008, in final form 24 March 2008
Published 18 April 2008
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Semiconductor to metal transition in SWNTs caused by interaction with gold and platinum nanoparticles
Rakesh Voggu et al 2008 J. Phys.: Condens. Matter 20 215211
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