Assembling semiconducting molecules by covalent attachment to a lamellar crystalline polymer substrate

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2016
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Machatschek, Rainhard
Reiter, Renate
Reiter, Günter
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Beilstein Journal of Nanotechnology. 2016, 7, pp. 784-798. eISSN 2190-4286. Available under: doi: 10.3762/bjnano.7.70
Zusammenfassung

We have investigated the potential of polymers containing precisely spaced side-branches for thin film applications, particularly in the context of organic electronics. Upon crystallization, the side-branches were excluded from the crystalline core of a lamellar crystal. Thus, the surfaces of these crystals were covered by side-branches. By using carboxyl groups as side-branches, which allow for chemical reactions, we could functionalize the crystal with semiconducting molecules. Here, we compare properties of crystals differing in size: small nanocrystals and large single crystals. By assembling nanocrystals on a Langmuir trough, large areas could be covered by monolayers consisting of randomly arranged nanocrystals. Alternatively, we used a method based on local supersaturation to grow large area single crystals of the precisely side-branched polymer from solution. Attachment of the semiconducting molecules to the lamellar surface of large single crystals was possible, however, only after an appropriate annealing procedure. As a function of the duration of the grafting process, the morphology of the resulting layer of semiconducting molecules changed from patchy to compact.

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Fachgebiet (DDC)
540 Chemie
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monolayer; nanocrystals; precision polyethylene; semiconducting molecules; single crystals
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ISO 690MACHATSCHEK, Rainhard, Patrick ORTMANN, Renate REITER, Stefan MECKING, Günter REITER, 2016. Assembling semiconducting molecules by covalent attachment to a lamellar crystalline polymer substrate. In: Beilstein Journal of Nanotechnology. 2016, 7, pp. 784-798. eISSN 2190-4286. Available under: doi: 10.3762/bjnano.7.70
BibTex
@article{Machatschek2016-06-02Assem-35496,
  year={2016},
  doi={10.3762/bjnano.7.70},
  title={Assembling semiconducting molecules by covalent attachment to a lamellar crystalline polymer substrate},
  volume={7},
  journal={Beilstein Journal of Nanotechnology},
  pages={784--798},
  author={Machatschek, Rainhard and Ortmann, Patrick and Reiter, Renate and Mecking, Stefan and Reiter, Günter}
}
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