Nano Archive

Surface-enhanced Raman spectroscopy and correlated scanning electron microscopy of individual carbon nanotubes

Kumar, Rajay and Zhou, Hao and Cronin, Stephen B. (2007) Surface-enhanced Raman spectroscopy and correlated scanning electron microscopy of individual carbon nanotubes. APPLIED PHYSICS LETTERS, 91 (22).

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.

Official URL: http://link.aip.org/link/?APPLAB/91/223105/1

Abstract

Raman spectra of individual carbon nanotubes are measured by scanning a focused laser spot (0.5 mu m diameter) over a large area (100 mu m(2)) before and after depositing silver nanoparticles. Local regions exhibiting surface enhanced Raman spectroscopy (SERS) were located with respect to a lithographically patterned grid, allowing subsequent scanning electron microscopy to be performed. The uniquely large aspect ratio of carbon nanotubes enables imaging of the nanoparticle geometry together with the SERS active molecule. By measuring the same individual carbon nanotube before and after metal nanoparticle deposition, the SERS enhancement factor is determined unambiguously. The data reveals SERS enhancement factors up to 134 000, a consistent upshift in the G band Raman frequency and nanoparticle heating in excess of 600 degrees C. (c) 2007 American Institute of Physics.

Item Type:Article
Subjects:Analytical Science > Microscopy and probe methods
Material Science > Functional and hybrid materials
Physical Science > Nano objects
ID Code:541
Deposited By:IoN
Deposited On:20 Jan 2009 11:37
Last Modified:29 Jan 2009 16:41

Repository Staff Only: item control page