title: Humidity effect of domain wall roughening behavior in ferroelectric copolymer thin films.
abstract: We have demonstrated that domain switching in ferroelectric copolymer films can be significantly affected by humidity. With increasing relative humidity (RH), we observed larger domains with highly irregular boundaries as a result of lateral spreading of the tip-induced electric field that originates from water adsorption. Fractal dimension study of irregular domains reveals that the fractal dimension is higher in cases where the RH is higher. The results show that the RH is one of the major switching parameters in ferroelectric copolymers, and therefore could allow clear understanding with regard to domain switching behavior in the ferroelectric copolymer films under ambient conditions.
authors.affiliation: Department of Chemistry, Chung-Ang University, Seoul 156-756, Republic of Korea.
authors.forename: Kwang-Won
authors.initials: KW
authors.lastname: Park
authors.forename: Hosung
authors.initials: H
authors.lastname: Seo
authors.forename: Jiyoon
authors.initials: J
authors.lastname: Kim
authors.forename: Daehee
authors.initials: D
authors.lastname: Seol
authors.forename: Jongin
authors.initials: J
authors.lastname: Hong
authors.forename: Yunseok
authors.initials: Y
authors.lastname: Kim