Figure 2.

Morphology of 1-GLFD nanofoils. (a) AFM color-mapped height image of a typical 1-GLFD assembly on a Si(100) wafer substrate (for details, see the Supporting Information and Figure S5). (b) TEM image of the obtained nanofoils, with normal, overlapping, and partially wrapped-up assemblies, indicating significant flexibility for these systems (for size distribution analysis, see Figure S2 and Table S1). (c) Cross-sectional height profile of the overlapping foils along the red line displayed in panel (a). The height profiles obtained provide an ∼6.2 nm average thickness per layer, which likely includes a hydration shell with sodium ions between the negatively charged foils (for further details, see the Supporting Information). (d) Schematic description of the flexible foils observed in panel (b). (e) Schematic description of the SP-to-MC conversion depicted within a small section of a nanofoil based on NMR and CD investigations.