Semiconductor to metal transition in SWNTs caused by interaction with gold and platinum nanoparticles

Details Semiconductor to metal transition in SWNTs caused by interaction with gold and platinum nanoparticles Semiconductor to metal transition in SWNTs caused by interaction with gold and platinum nanoparticles

2008-03-24

arxiv.org/abs/0803.3368v1

2008 J. Phys.: Condens. Matter 20 215211

Physics

Condensed Matter

Materials Science

16 pages, 5 figures

Scientific paper

10.1088/0953-8984/20/21/215211

Single-walled carbon nanotubes (SWNTs) have been coated with gold and platinum nanoparticles either by microwave treatment or by the click reaction and 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 on attachment with metal nanoparticles. This conclusion is also supported by the changes observed in the RBM bands. Ab-initio calculations reveal that semiconductor-metal transition occurs in SWNTs due to Columbic charge transfer between the metal nanoparticles and the semiconducting SWNTs.

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