Highly crystalline and uniaxial oriented PTFE films, nonostructured in one dimension, were used to produce a new kind of fully crystalline, thermo-reversible morphology in the ferroelectric copolymer Poly[Vinylidenefluoride-Trifluoroetnylene]. The resulting state is built up of regularly stacked lamella crystals of about 100 nm thickness and lateral dimensions and about 20 mu m building up a superlattice. Two elastic instabilities have been found in the vicinity of the ferroelectric transition of the single crystal.

Highly crystalline and uniaxial-oriented polytetrafluoroethylene films, nanostructured in one dimension, were used to produce a fully crystalline, thermoreversible morphology in the ferroelectric copolymer poly[vinylidenefluoride-trifluoroethylene]. The resulting state is built up of regularly stacked lamellar crystals of about 100 nm thickness and lateral dimensions of about 6 mu m.