Janus Mesoporous Nanodisc from Gelable Triblock Copolymer.

The polymer/inorganic composite trilayered Janus mesoporous nanodiscs are synthesized by coassembly of gelable poly(ethylene oxide)- block -poly(3-triethoxysilylpropyl methacrylate)- block -polystyrene (PEO- b -PTEPM- b -PS) and PEO- b -PS via a sol-gel process at an emulsion interface. Bimodal phase separations are responsible for the formation of isolated nanodiscs and mesopores within the discs. The Janus mesoporous nanodiscs are amphiphilic to form superstructures in dispersions. They can serve as a solid surfactant to stabilize emulsions.