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. 2016 May 27;6:26840. doi: 10.1038/srep26840

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Shells with ideal photonic properties can be produced with 20 wt.-% RM-257. After polymerisation these shells sustain strong mechanical pressure ((a) no deformation; (b) shells compressed until the top is in the focal plane; (c) maximum compression during the experiment), as well as shells pressing against each other. After releasing the pressure (d) the photonic cross communication is immediately recovered. The images are obtained in reflection between crossed polarisers and extracted from Movie SI5 in the Supporting Information; scale bar: 100 μm. The continuous distortion of the sample, with consequent variations in location of the reflection plane, renders all photos except (b) somewhat out of focus.