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Observation of filamentous nanostructures in organic-inorganic composite thin films deposited by co-evaporation

Nanostructures are important for a wide area of applications, but are very often difficult to fabricate. A novel and basic approach for controlled nanofilament growth in an organic/inorganic composite material is demonstrated. Thin films of MoO3-doped 4′-bis(N-carbazolyl)-1,1′-biphenyl are grown via...

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Main Authors: Donhauser, Daniela (Author) , Pfannmöller, Martin (Author) , Dieterle, Levin (Author) , Schultheiß, Katrin (Author) , Schröder, Rasmus R. (Author) , Kowalsky, Wolfgang (Author) , Kröger, Michael (Author)
Format: Article (Journal)
Language:English
Published: November 21, 2013
In: Advanced functional materials
Year: 2013, Volume: 23, Issue: 17, Pages: 2130-2136
ISSN:1616-3028
DOI:https://doi.org/10.1002/adfm.201202089
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/https://doi.org/10.1002/adfm.201202089
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201202089
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Author Notes:Daniela Donhauser, Martin Pfannmöller, Levin Dieterle, Katrin Schultheiß, Rasmus R. Schröder, Wolfgang Kowalsky, and Michael Kröger
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Summary:Nanostructures are important for a wide area of applications, but are very often difficult to fabricate. A novel and basic approach for controlled nanofilament growth in an organic/inorganic composite material is demonstrated. Thin films of MoO3-doped 4′-bis(N-carbazolyl)-1,1′-biphenyl are grown via vacuum sublimation and analyzed using advanced electron microscopy and spectroscopy techniques. Using electron spectroscopic imaging in the core-loss and low-loss regime, MoO3 agglomerations are identified for different doping concentrations. A 3D reconstruction of the thin film yielded by electron tomography reveals a filamentous structure of MoO3 within the organic matrix. These filaments are preferentially oriented along the growth direction and are only a few nanometers in diameter. Furthermore, control of the filament growth is possible by changing the substrate temperature because for composites grown on substrates cooled to 120 K MoO3 agglomeration cannot be detected.
Item Description:Gesehen am 18.12.2020
Physical Description:Online Resource
ISSN:1616-3028
DOI:https://doi.org/10.1002/adfm.201202089

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