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- Title
High-resolution Raman imaging of bundles of single-walled carbon nanotubes by tip-enhanced Raman spectroscopy.
- Authors
Kazemi-Zanjani, Nastaran; Gobbo, Pierangelo; Zhu, Ziyan; Workentin, Mark S.; Lagugné-Labarthet, François
- Abstract
Bundles of single-walled carbon nanotubes (SWCNTs) prepared by plasma torch method and further purified, are deposited over a glass coverslip to estimate the spatial resolution of tip-enhanced Raman spectroscopy measurements. For this purpose, near-field Raman maps and spectra of isolated bundles of carbon nanotubes are collected using optimized experimental conditions such as a tightly focused beam using a 1.4 numerical aperture oil immersion microscope objective and a gold coated atomic force microscope probe illuminated by a radially polarized 632.8 nm wavelength to selectively excite the localized surface plasmon confined at the extremity of the tip. The near-field nature of the collected Raman signals is evaluated through measuring the decay of the Raman signal with respect to the tip-sample separation.
- Subjects
RAMAN spectroscopy; CARBON nanotubes; PLASMA torch; ATOMIC force microscopes; SURFACE plasmons
- Publication
Canadian Journal of Chemistry, 2015, Vol 93, Issue 1, p51
- ISSN
0008-4042
- Publication type
Article
- DOI
10.1139/cjc-2014-0247