Bottom‐Up Synthesis of Titanate Nanosheets with Hierarchical Structures and a High Specific Surface Area

Making a stack: Layered titanate nanosheets (see field-emission TEM image) ≈10 nm in thickness and with a specific surface area above 400 m2 g−1 were prepared by stacking TiO6 monolayers and ammonium ions through a bottom-up route in an agar matrix containing TiF4. Higher-order architectures, such as spherical particles and hollow needles, were produced by self-organized growth of the nanosheets.