Layered double hydroxides, a rare family of anion-exchangeable functional materials with broad application
prospects, have received much attention both in academic research reports and technological patents. It was recently discovered
that they could be exfoliated into unilamellar nanosheets in different solvents. Especially, well-defined LDH
nanosheets can be obtained through total delamination, in formamide, of large-sized crystallites prepared from homogeneous
precipitation using hydrolysis agents. Bearing a positive charge at a two-dimensional molecular scale, layered double
hydroxide nanosheets can be used as a model system for electrostatic layer-by-layer assembly in combination with polyanionic
counterparts (polymer, DNA, oxide nanosheets, etc.) for various functional nanoarchitectures, such as lamellar
aggregates, multilayer nanofilms and nanoshells.