Ferroelectric polymer nano-flake crystal: Effect of counter charge

Recently, we have shown that crystalline two monolayer thick free standing film, ldquonano-flakerdquo, of polar phase of poly(vinylidene fluoride) grows intrinsically off substrate in vacuum under depolarization field neutralizing condition by use of a molecular dynamics simulation method [1]. The nucleation and growth of the ldquonano-flakerdquo crystal is achieved only for the depolarization field neutralizing condition. Here, we discuss the effect of counter charge in comparison with the case of the electrostatic condition corresponding to that without counter charge. This work opens a new way to fabricate new materials for applications.