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Clay-Based Nanocomposite Coating for Flexible
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Optoelectronics Applying Commercial Polymers
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Daniel A. Kunz,† Jasmin Schmid,† Patrick Feicht,† Johann Erath, ‡ Andreas Fery, ‡ and Josef
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Breu†,* †
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Department of Inorganic Chemistry I, University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany
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Department of Physical Chemistry II, University of Bayreuth, Universitätsstraße 30, D-95440
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Bayreuth, Germany
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* To whom correspondence should be addressed:
[email protected]; josef.breu@uni-
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bayreuth.de
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Supplementary Information
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Supplementary figures
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Figure S1. Number-weighted focused beam reflectance measurements (FBRM) for an aqueous
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Na-hec suspension (black curve) and for an O-hec suspension in acetonitrile (red curve). The
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median values are 25 µm for Na-hec and 24 µm for O-hec, respectively.
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Figure S2. Cross-section polished SEM image of the inclusion of a dust particle. Please note
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that the coating is fanned out in this region which may limit the gas barrier performance.
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Figure S3. Cross-section TEM image of the nanocomposite coating prepared with the ion-
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slicer. Brighter regions in the cross-section denote phase segregated polymer. It seems that phase
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segregation took place upon film drying while the suspension per se was stable. The inset
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underlines the perfect texture of the nanoplateles.
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Figure S4. Visible light transmission as a function of the wavelength for the neat PET foil and
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the nanocomposite coating on PET.
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