Formation of extraordinarily large nanosheets from K4Nb6O17 crystals

Exfoliated K4Nb6O17 bilayer nanosheets in extraordinarily large size (ca. 100 mum) were prepared by the direct reaction of K4Nb6O17.3H(2)O crystals with an aqueous solution of propylamine; the size was extremely larger than that of exfoliated nanosheets (several mum) reported previously.