Supramolecular polymerization at the interface: layer-by-layer assembly driven by host-enhanced π-π interaction.

Host-enhanced π-π interaction as a new driving force was used for fabricating layer-by-layer (LbL) films. This kind of LbL assembly can be regarded as a sort of supramolecular polymerization at the interface and its degree of supramolecular polymerization can be controlled efficiently by adjusting layer pairs similar to living polymerization in solution.