Fig. 3: Versatility in geometries and structures.
From: Controlled filamentation instability as a scalable fabrication approach to flexible metamaterials
a SEM picture of long-range ordered filaments in a fiber cross-section. b Optical micrographs of cross-sections of the ChG films after deposition onto polymer substrate with different template periods. c SEM pictures of the corresponding NW array geometry. d Period/diameter ratio for some fibers tested, compared to the flat film case (solid line), plotted against deposited film thickness. In the latter case, only one period/diameter ratio is accessible for a given film thickness. e Filaments can be accessed individually when dissolving the cladding. f Small satellite NWs can be seen for each larger NW, demonstrating the possibility to achieve sub-period dewetting. g Layers can be stacked to make three-dimensional architectures. Scale bars are respectively: a 10 μm, b 20 μm, c 200 μm (top), 100 μm (middle), 50 μm (bottom), e 1 μm, f 2 μm, g 1.5 μm.
