Nano Archive

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

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.

Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.

Abstract

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.

Item Type:Article
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
ID Code:2924
Deposited By:JNCASR
Deposited On:20 Jan 2009 11:10
Last Modified:20 Jan 2009 11:10

Repository Staff Only: item control page