Reversible phase transition and structure memory effect of metastable phase in electron-irradiated poly(vinylidene-fluoride-trifluoroethyline) copolymers

Abstract

Structural evolution and dielectric relaxation behavior of electron-irradiated poly(vinylidene fluoride-trifluoroethylene) 80/20 mol% copolymers J. Appl. Phys. 94, 5566 (2003); 10.1063/1.1606853Dielectric relaxation behavior and its relation to microstructure in relaxor ferroelectric polymers: High-energy electron irradiated poly(vinylidene fluoride-trifluoroethylene) copolymers High electrostrictive strain under high mechanical stress in electron-irradiated poly(vinylidene fluoridetrifluoroethylene) copolymer

Large electrostrictive strain at gigahertz frequencies in a polymer nanoactuator: Computational device design

“…More recently, the discovery of large electrostrictive strain in electron-irradiated poly ͑vinylidene fluoridetrifluoroethylene͒ ͓P͑VDF-TrFE͔͒ copolymer by Zhang and collaborators 1 showed the possibility of using electric-fieldinduced and reversible phase transitions between polar and nonpolar structures of ͓P͑VDF-TrFE͔͒ to achieve large strains ͑ϳ7%͒ at high frequencies ͑up to ϳ10 kHz͒ leading to very good energy densities, similar to those in piezoceramics. 2,3 In this letter, we use atomistic computer simulations to explore the possibility of improving the electromechanical properties of PVDF-based nanoactuators by controlling and optimizing their structure at the molecular level. Nanoscale actuators and motors play a central role in nanotechnology, and atomistic modeling is a powerful tool to design and test nanodevices in a fast and cost-effective manner, postponing issues of fabrication until a promising design is found.…”