| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Bunk, Oliver
Humboldt-Universität zu Berlin
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2020 Between V2 and V3: Processing non-canonical sentence structures in L2 German
- 2018Small-angle X-ray scattering tensor tomography : Model of the three-dimensional reciprocal-space map, reconstruction algorithm and angular sampling requirementscitations
- 2016Ultrastructure Organization of Human Trabeculae Assessed by 3D sSAXS and Relation to Bone Microarchitecturecitations
- 20153D scanning SAXS: A novel method for the assessment of bone ultrastructure orientationcitations
- 2015Nanostructure surveys of macroscopic specimens by small-angle scattering tensor tomographycitations
- 2013Density mapping of hardened cement paste using ptychographic X-ray computed tomographycitations
- 2010Comparison of quasistatic to impact mechanical properties of multiwall carbon nanotube/polycarbonate compositescitations
- 2005Structure of zone-cast HBC-C 1 2 H 2 5 filmscitations
- 2005Structure of zone-cast HBC-C12H25 filmscitations
- 2003Induced alignment of a solution-cast discotic hexabenzocoronene derivative for electronic devices investigated by surface X-ray diffractioncitations
Places of action
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article
Structure of zone-cast HBC-C12H25 films
Abstract
The structure of a thin zone-cast film of the hexa-n-dodecyl-substituted hexa-peri-benzocoronene (HBC) has been investigated using grazing incidence X-ray diffraction. A model with an orthorhombic unit cell containing two molecules accounts well for the observations. The molecules are arranged in a "herringbone" structure resembling the packing observed for unsubstituted HBC. The molecular disk planes are oriented perpendicularly to the substrate, rotated by approximately 39 degrees about the film normal. The relatively long side chains of dodecyl were found to be in an ordered interdigitated state. The aliphatic side chains and the aromatic HBC-cores segregate to form regular vertical domains spanning the film thickness. For in-plane rocking scans a discrete orientation distribution is observed with peaks at regular angle intervals. We interpret this as a grain boundary effect induced by alkyl chain stacking faults.