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Excitonic channels from bio-inspired templated supramolecular assembly of J-aggregate nanowires

  • Anantharaman, Surendra B. Laboratory for Functional Polymers, Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf, Switzerland - Institut des matériaux, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
  • Messmer, Daniel Laboratory of Polymer Chemistry, Department of Materials, ETH Zurich, Switzerland
  • Sadeghpour, Amin Center for X-ray Analytics, Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf, Switzerland - Laboratory for Biointerfaces, Swiss Federal Laboratories for Materials Science and Technology (Empa), St Gallen, Switzerland - Laboratory for Biomimetic Membranes and Textiles, Swiss Federal Laboratories for Materials Science and Technology (Empa), St Gallen, Switzerland
  • Salentinig, Stefan Department of Chemistry, University of Fribourg, Switzerland
  • Nüescha, Frank Institut des matériaux, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
  • Heier, Jakob Laboratory for Functional Polymers, Swiss Federal Laboratories for Materials Science and Technology (Empa), Dübendorf, Switzerland
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    04.04.2019
Published in:
  • Nanoscale. - 2019, vol. 11, no. 14, p. 6929–6938
English Supramolecular assemblies with controlled morphology are of paramount importance for energy transport in organic semiconductors. Despite considerable freedom in molecular design, the preparation of dyes that form one dimensional J-aggregates is challenging. Here, we demonstrate a simple and effective route to functionalize dendronized polymers (DPs) with J-aggregates to construct tubular DP/J-aggregate nanowires. When J-aggregates are adsorbed onto DPs anchored to glass substrates, they assemble into microcrystalline domains typical for J-aggregates adsorbed on functionalized surfaces. Differently, the complexation between the dendronized polymer and J-aggregates in solution leads to dense packing of J-aggregate strands on the periphery of the DPs. Using a layer-by-layer (LBL) technique, DPs loaded with J-aggregates can also be adsorbed onto a DP monolayer. In this case, the thin film absorption spectra are narrower and indicate higher ratios of J-aggregate to monomer and dimer absorption than bare J-aggregates deposited similarly. The demonstration of J-aggregate adsorption on filamentous polymeric templates is a promising step toward artificial 1D light harvesting antennas, with potential applications in opto- electronic devices.
Faculty
Faculté des sciences et de médecine
Department
Département de Chimie
Language
  • English
Classification
Chemistry
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/307650
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