Controlled alignment of individual single-wall carbon nanotubes at high concentrations in polymer matrices Auteur(s): Zamora-Ledezma C., Blanc C., Anglaret E. (Article) Publié: The Journal Of Physical Chemistry C, vol. 116 p.13760 (2012) Ref HAL: hal-00713317_v1 DOI: 10.1021/jp212113b WoS: 000305769900036 Exporter : BibTex | endNote 16 Citations Résumé: 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. |