Abstract
Poly(9,9-dioctylfluorene) conjugated polymer nanowire active waveguides were fabricated by melt-assisted wetting of porous anodic alumina templates. Selected-area electron diffraction studies indicated that the wires were semi-crystalline with a radial orientation of the polymer molecules. Under ultraviolet excitation, the characteristic blue light emission of the polymer was strongly confined within the wires, propagating towards and out-coupling at the nanowire tips. Single wire polarization-resolved photoluminescence data indicated that the nanowire tips essentially acted as sub-wavelength polarized light sources. Detailed optical measurements made on single wires in vacuum and in a polymer host confirmed that the measured emission anisotropy was not an environment-related artefact but was due to radial packing of the polymer molecules within the wires.
Original language | English |
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Pages (from-to) | 2468-2473 |
Number of pages | 6 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 40 |
Issue number | 7 |
DOIs | |
Publication status | Published - May 1 2008 |
Keywords
- Conjugated polymers
- Nanowires
- Polyfluorene
- Waveguides
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics