Surface-controlled spatially heterogeneous physical properties of a supramolecular gel with homogeneous chemical composition.
Angelereou, Maria Galini Faidra
Royal Society of Chemistry (RSC)
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Yang, B., Lledos, M., Akhtar, R., Ciccone, G., Jiang, L., Russo, E., Rajput, S., et al. (2021). Surface-controlled spatially heterogeneous physical properties of a supramolecular gel with homogeneous chemical composition.. Chem Sci, 12 (42), 14260-14269. https://doi.org/10.1039/d1sc04671c
Controlling supramolecular self-assembly across multiple length scales to prepare gels with localised properties is challenging. Most strategies concentrate on fabricating gels with heterogeneous components, where localised properties are generated by the stimuli-responsive component. Here, as an alternative approach, we use a spiropyran-modified surface that can be patterned with light. We show that light-induced differences in surface chemistry can direct the bulk assembly of a low molecular weight gelator, 2-NapAV, meaning that mechanical gel properties can be controlled by the surface on which the gel is grown. Using grazing incidence X-ray diffraction and grazing incidence small angle X-ray scattering, we demonstrate that the origin of the different gel properties relates to differences in the architectures of the gels. This provides a new method to prepare a single domain (i.e., chemically homogeneous) hydrogel with locally controlled (i.e., mechanically heterogeneous) properties.
External DOI: https://doi.org/10.1039/d1sc04671c
This record's URL: https://www.repository.cam.ac.uk/handle/1810/332291
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/