Product Code: ICAL06_M1104

Raman Mapping of Single-walled Carbon Nanotubes at Nanoscales with Micro-Raman
Authors:
K.J. Yi, University of Nebraska; Lincoln NE USA
J. Shi, University of Nebraska; Lincoln NE USA
Yongfeng Lu, University of Nebraska-Lincoln; Lincoln NE USA
Presented at ICALEO 2006

Single-walled carbon nanotubes (SWCNTs) are ideal systems for studying the transport of electrons in one dimension and have commercial potential as nanoscale wires, transistors and sensors. Raman scattering from SWCNTs provides an effective and non-destructive means to reveal the remarkable structure, the unusual electronic and photonic properties of individual nanotubes. In this study, the SWCNTs were grown between two metallic electrodes with a distance of 2-5 μm using laser-assisted chemical vapor deposition (LCVD). The SWCNTs were precisely located by a motorized XYZ stage with a step resolution of 2 μm. The Raman peaks for the radial breathing mode (RMB) and G mode were measured. From the Raman spectra, the diameter and chirality were analyzed. The RMB mode from these nanotubes is spectroscopically mapped with spatial coordinates of submicron resolution. The results are compared with the observations from scanning electron microscopy.