Fabrication of composite thin films with microstructures of honeycomb, foam, and nanosphere arrays through adsorption and self-assembly of block copolymers at the liquid/liquid interface

- Composite films with different structures were formed at the liquid/liquid interface.
- These films are composed of diblock or triblock copolymers and inorganic species.
- PS-b-P4VP/Au and PS-b-P4VP/Ag have honeycomb and foam structure, respectively.
- P4VP-b-PS-b-P4VP/Au forms a free-standing film with a nanosphere array structure.
- Co-adsorption and self-assembly of polymer and the ions lead to the film formation.