| 학회 | 한국재료학회 |
| 학술대회 | 2012년 가을 (11/07 ~ 11/09, 라카이샌드파인 리조트) |
| 권호 | 18권 2호 |
| 발표분야 | B. 나노재료(Nanomaterials) |
| 제목 | Morphology and ferroelectric property of P(VDF-TrFE) thin and ultrathin filmscrystallized at high temperatures |
| 초록 | It is now well-known that the ferroelectric property, remanent polarization (Pr) for example, of ferroelectric poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)] copolymer thin films are critically dependent on the crystallization temperature. That is, the ellipsoidal grain-like crystalline morphology that is obtained from annealing (135℃~137℃)just below the melting point (Tm) of the material shows the best ferroelectric performance. On the other hand, fiber-like morphology generated by crystallization at higher (T＞Tm) temperatures has been implicitly believed to be the reason for the reduction in Pr. Various techniques such as atomic force microscopy (AFM), FT-IR, ferroelectric measurement, and piezoelectric force microscopy (PFM) have been used to find out the correlation between crystalline morphology and ferroelectric property of samples as a function of film thickness and annealing temperature. Especially, the difference in ferroelectric property depending on crystallite shape, ellipsoidal grain, long fiber, or chain of broken fiber segment, will be discussed based on the nanoscale ferroelectric characterization results from PFM. |
| 저자 | Ju-Han Kim1, Dahl-Young Khang2 |
| 소속 | 1Department of Materials Science and Engineering, 2Yonsei Univ. |
| 키워드 | P(VDF-TrFE) copolymer; ferroelectric property; crystalline morphology |
