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β -Phase Morphology in Ordered Poly(9,9-dioctylfluorene) Nanopillars by Template Wetting Method

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ABSTRACT

An efficient method based in template wetting is applied for fabrication of ordered Poly(9,9-dioctylfluorene) (PFO) nanopillars with β-phase morphology. In this process, nanoporous alumina obtained by anodization process is used as template. PFO nanostructures are prepared under ambient conditions via infiltration of the polymeric solution into the pores of the alumina with an average pore diameter of 225 nm and a pore depth of 500 nm. The geometric features of the resulting structures are characterized with environmental scanning electron microscopy (ESEM), luminescence fluorimeter (PL) and micro μ-X-ray diffractometer (μ-XRD). The characterization demonstrates the β-phase of the PFO in the nanopillars fabricated. Furthermore, the PFO nanopillars are characterized by Raman spectroscopy to study the polymer conformation. These ordered nanostructures can be used in optoelectronic applications such as polymer light-emitting diodes, sensors and organic solar cells.

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ESEM images of a top view of the self-ordered alumina template (Inset: cross section of the template), b PFO nanopillars after removing the template. c The chemical structure of a segment of a PFO chain in the β-phase conformation. The rotational angle between monomer units is fixed at 180°.
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Figure 1: ESEM images of a top view of the self-ordered alumina template (Inset: cross section of the template), b PFO nanopillars after removing the template. c The chemical structure of a segment of a PFO chain in the β-phase conformation. The rotational angle between monomer units is fixed at 180°.

Mentions: Ordered poly(9,9-dioctylfluorene) nanopillars with β-phase morphology were obtained by replicating from nanoporous alumina via template wetting at room temperature. As explained in the experimental section, the template were fabricated by two-step anodization process in phosphoric acid, yielding templates with an average pore depth of 500 nm and pore diameter of 225 nm (Figure 1a). A scanning electron microscopy (ESEM) image of a PFO nanopillar array acquired after the template dissolution is shown in Figure 1b.


β -Phase Morphology in Ordered Poly(9,9-dioctylfluorene) Nanopillars by Template Wetting Method
ESEM images of a top view of the self-ordered alumina template (Inset: cross section of the template), b PFO nanopillars after removing the template. c The chemical structure of a segment of a PFO chain in the β-phase conformation. The rotational angle between monomer units is fixed at 180°.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211439&req=5

Figure 1: ESEM images of a top view of the self-ordered alumina template (Inset: cross section of the template), b PFO nanopillars after removing the template. c The chemical structure of a segment of a PFO chain in the β-phase conformation. The rotational angle between monomer units is fixed at 180°.
Mentions: Ordered poly(9,9-dioctylfluorene) nanopillars with β-phase morphology were obtained by replicating from nanoporous alumina via template wetting at room temperature. As explained in the experimental section, the template were fabricated by two-step anodization process in phosphoric acid, yielding templates with an average pore depth of 500 nm and pore diameter of 225 nm (Figure 1a). A scanning electron microscopy (ESEM) image of a PFO nanopillar array acquired after the template dissolution is shown in Figure 1b.

View Article: PubMed Central - HTML - PubMed

ABSTRACT

An efficient method based in template wetting is applied for fabrication of ordered Poly(9,9-dioctylfluorene) (PFO) nanopillars with β-phase morphology. In this process, nanoporous alumina obtained by anodization process is used as template. PFO nanostructures are prepared under ambient conditions via infiltration of the polymeric solution into the pores of the alumina with an average pore diameter of 225 nm and a pore depth of 500 nm. The geometric features of the resulting structures are characterized with environmental scanning electron microscopy (ESEM), luminescence fluorimeter (PL) and micro μ-X-ray diffractometer (μ-XRD). The characterization demonstrates the β-phase of the PFO in the nanopillars fabricated. Furthermore, the PFO nanopillars are characterized by Raman spectroscopy to study the polymer conformation. These ordered nanostructures can be used in optoelectronic applications such as polymer light-emitting diodes, sensors and organic solar cells.

No MeSH data available.


Related in: MedlinePlus