Single-walled carbon nanotube purification, pelletization, and surfactant-assisted dispersion: a combined TEM and resonant micro-raman spectroscopy study.
Resonant Raman spectroscopy and transmission electron microscopy were used to characterize the structural changes of three single-walled carbon nanotube samples processed with purification, pelletization, and surfactant-assisted dispersion. A two-stage purification process selectively removes metallic tubes as well as small-diameter ones, enriching large-diameter semiconducting tubes. Pelletizing reduces the intertube distance but greatly increases the intensity ratio of the D band to the G band. Single-walled nanotube (SWNT) bundle size decreases during ultrasonication dispersion aided by a surfactant. SWNT bundles composed of large-diameter tubes are prone to debundling.
Shen
Kai
K
Department of Chemistry, New Mexico Tech, Socorro, New Mexico 87801, USA.
Curran
Seamus
S
Xu
Huifang
H
Rogelj
Snezna
S
Jiang
Yingbing
Y
Dewald
James
J
Pietrass
Tanja
T
D002244:Carbon / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission; D036103:Nanotechnology; D043942:Nanotubes / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D013501:Surface-Active Agents
D013501:Surface-Active Agents; D002244:Carbon