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Article: Findings from C. Zamoraledezma and co-authors broaden understanding of physics.
- Article from:
- Nanotechnology Weekly
- Article date:
- November 2, 2009
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"We study the alignment of single-wall carbon nanotubes in polyvinylalcohol composites using polarized Raman and photoluminescence spectroscopies. Nanotubes are well dispersed down to the individual scale in the composites as revealed by the strong photoluminescence signal," scientists in Caracas, Venezuela report.
"Alignment can be continuously adjusted by hot stretching the composites. We propose a simple relation to measure the order parameter based on the assumption that only one single component of the Raman polarizability tensor is nonzero. The similar profiles of spectra measured in different polarization configurations validate this assumption," wrote C. ...