Existence of two-dimensional physical gels even at zero surface pressure at the air/water interface: rheology of self-assembled domains of small molecules
Films of mesoscopic domains self-assembled from fluorocarbon/hydrocarbon diblock copolymers (FnHm) at the air/water interface were found to display highly elastic behavior. We determined the interfacial viscoelasticity of domain-patterned FnHm Langmuir monolayers by applying periodic shear stresses....
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
14 August 2017
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| In: |
Angewandte Chemie. International edition
Year: 2017, Jahrgang: 56, Heft: 41, Pages: 12603-12607 |
| ISSN: | 1521-3773 |
| DOI: | 10.1002/anie.201707009 |
| Online-Zugang: | Verlag, Volltext: http://dx.doi.org/10.1002/anie.201707009 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201707009 
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| Verfasserangaben: | Mariam Veschgini, Taichi Habe, Salomé Mielke, Shigeto Inoue, Xianhe Liu, Marie Pierre Krafft, Motomu Tanaka |
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| 245 | 1 | 0 | |a Existence of two-dimensional physical gels even at zero surface pressure at the air/water interface |b rheology of self-assembled domains of small molecules |c Mariam Veschgini, Taichi Habe, Salomé Mielke, Shigeto Inoue, Xianhe Liu, Marie Pierre Krafft, Motomu Tanaka |
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| 520 | |a Films of mesoscopic domains self-assembled from fluorocarbon/hydrocarbon diblock copolymers (FnHm) at the air/water interface were found to display highly elastic behavior. We determined the interfacial viscoelasticity of domain-patterned FnHm Langmuir monolayers by applying periodic shear stresses. Remarkably, we found the formation of two-dimensional gels even at zero surface pressure. These monolayers are predominantly elastic, which is unprecedented for surfactants, exhibiting gelation only at high surface pressures. Systematic variation of the hydrocarbon (n=8; m=14, 16, 18, 20) and fluorocarbon (n=8, 10, 12; m=16) block lengths demonstrated that subtle changes in the block length ratio significantly alter the mechanics of two-dimensional gels across one order of magnitude. These findings open perspectives for the fabrication of two-dimensional gels with tuneable viscoelasticity via self-assembly of mesoscale, low-molecular-weight materials. | ||
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