Nanoscale domain growth dynamics of ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) thin films

作者：Kim Yunseok^*; Kim Wooyoung; Choi Hyunwoo; Hong Seungbum; Ko Hyungsoo; Lee Heechul; No Kwangsoo

来源：Applied Physics Letters, 2010, 96(1): 012908.

DOI：10.1063/1.3290247

• atomic force microscopy
• dielectric polarisation
• electric domains
• ferroelectric materials
• ferroelectric thin films
• nanofabrication
• nanopatterning
• nanostructured materials
• nucleation
• polymer films
• spin coating

Nanoscale domain growth dynamics of ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) thin films were investigated by piezoresponse force microscopy. A 90 nm thick ferroelectric polymer thin films were fabricated on Au substrate by spin-coating method. The domain size of nanoscale dot pattern was linearly proportional to logarithmic value of the pulse width. However there was a significant asymmetry in nucleation and lateral domain growth depending on the voltage polarity, which implies the existence of the preferred polarization states. The obtained activation field indicates the nucleation-limited domain switching behaviors of ferroelectric polymer thin films.

• 出版日期2010-1-4