Nanoscale fibrils and grids : Aggregated structures from rigid-rod conjugated polymers

摘要: Langmuir−Blodgett (LB) molecular processing of conjugated polymers [poly(phenylene ethynylenes)] into highly aligned films has revealed conditions for the formation liquid crystalline monolayer that structurally evolve fibril aggregates. The structural requirements poly(phenylene ethynylene)s to display phases capable or alignment by LB methods were determined. reconstruction monolayers structures was found require a low glass-transition temperature (Tg), weak surface anchoring, and with high energy can be stabilized reorganization. This assembly aggregated produces rigid units analogous naturally occurring fibrous proteins such as collagen elastin. These oriented, shape-persistent nanoscale create new possibilities construction complex supramolecular structures, this capability been demonstrated grid.