期刊
MACROMOLECULES
卷 42, 期 12, 页码 4148-4154出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma900422n
关键词
-
资金
- Korea Science and Engineering Foundation (KOSEF)
- Korea government (MOST) [R11-2007-050-03001-0]
We present a robust route for fabricating a thin ferroelectric poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) film with both molecular and microstructural crystal ordering over the area of I x I cm. The method is based on the static mechanical shearing of the Film under appropriate thermal conditions. The apparatus designed particularly for ultrathin PVDF-TrFE films with thickness of 200 nm or less allowed us to fabricate a thin film with ca. 25 nm thick crystalline lamellae globally ordered perpendicular to the shear direction. Grazing incident X-ray diffraction and polarized near edge X-ray absorption fine structure further revealed the molecular orientation of the crystals with c and a axes of the PVDF-TrFE crystals preferentially oriented parallel to shear direction and film surface normal, respectively. The shearing of a thin film at 135 degrees C gave rise to the best crystal orientation directly correlated with approximately 50% enhanced ferroelectric polarization observed in a metal/sheared PVDF-TrFE/metal capacitor.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据