Formation of extraordinarily large nanosheets from K4Nb6O17 crystalsElectronic supplementary information (ESI) available: powder XRD patterns of the slurries, AFM image of the sample in the supernatant, image of K4Nb6O17 crystals. See http://www.rsc.org/suppdata/cc/b2/b206998a/

Exfoliated K4Nb6O17 bilayer nanosheets in extraordinarily large size (ca. 100 microns) were prepared by the direct reaction of K4Nb6O17.3H2O crystals with an aqueous solution of propylamine; the size was extremely larger than that of exfoliated nanosheets (several microns) reported previously.