Figure 2: Free-standing lamellar vermiculite membrane constructed from exfoliated flakes.
From: Self-assembled two-dimensional nanofluidic proton channels with high thermal stability

(a) A flexible free-standing vermiculite membrane obtained by vacuum filtration (scale bar, 1 cm). The lamellar microstructure is clearly shown in (b) the cross-sectional SEM (scale bar, 1 μm). (c) XRD patterns of unexfoliated vermiculite crystals and the reconstructed vermiculite membranes.