期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 116, 期 25, 页码 13760-13766出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp212113b
关键词
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资金
- ANR P-NANO program
- bilateral France-Venezuela PCP (Programa de Cooperacion de Postgrados)
- PICS (Programa Internacional de Cooperacion Cientifica)
We show that single-wall carbon nanotubes (SWCNT) can be dispersed as individuals in poly(vinyl alcohol) matrix composites up to concentrations of 1 wt %, as indicated by their strong photoluminescence (PL) signal in the near-infrared all along the processing steps. The alignment of the SWCNT is controlled by hot-stretching of the composite films. We show that orientational order can be described accurately from polarized Raman and PL spectroscopies, in good agreement with a simple affine model, providing their anisotropic absorption is properly taken into account. Similar results are obtained from different excitation laser lines (in the visible and near-infrared), confirming that all nanotubes orient the same way.
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