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Instruments / Technical Area	Publication Details	Published	Actions
I07-Surface & interface diffraction	Surface-controlled spatially heterogeneous physical properties of a supramolecular gel with homogeneous chemical composition Bin Yang , Marina Lledos , Riaz Akhtar , Giuseppe Ciccone , Long Jiang , Emanuele Russo , Sunil Rajput , Chunyu Jin , Maria Angelerou , Thomas Arnold , Jonathan Rawle , Massimo Vassalli , Maria Marlow , Dave J. Adams , Mischa Zelzer Chemical Science DOI: 10.1039/D1SC04671C Diamond Proposal Number(s): [16246] Open Access Show Abstract ▼ Abstract: 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.	Oct 2021
I07-Surface & interface diffraction	Hydrophobicity of surface-immobilised molecules influences architectures formed via interfacial self-assembly of nucleoside-based gelators Maria Galini Faidra Angelerou , Bin Yang , Thomas Arnold , Jonathan Rawle , Maria Marlow , Mischa Zelzer Soft Matter 34 DOI: 10.1039/C8SM01868E Diamond Proposal Number(s): [16246] Open Access Show Abstract ▼ Abstract: Surface-mediated self-assembly has potential in biomaterial development but underlying rules governing surface–gelator interactions are poorly understood. Here, we correlate surface properties with structural characterization data of nucleoside-based gels obtained by GISAXS and GIWAXS and find that hydrophobicity descriptors (log[thin space (1/6-em)]P, polar surface area, aromaticity) are key predictors for the gel structures formed.	Dec 2018

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