Effect of Substrate Temperature on Molecular Orientation in Evaporated Thin Films of Vinylidene Fluoride Oligomer
Effect of Substrate Temperature on Molecular Orientation in Evaporated Thin Films of Vinylidene Fluoride Oligomer
复制标题
基材温度对偏二氟乙烯低聚物蒸发薄膜分子取向的影响
DOI：
10.1143/jjap.36.7389
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发表时间：
1997
影响因子：
1.5
通讯作者：
K. Matsushige
中科院分区：
文献类型：
--
作者：
Y. Yoshida;K. Ishida;K. Ishizaki;T. Horiuchi;K. Matsushige
一种新合成的偏二氟乙烯低聚物（OVDF），其电偶极子与分子都对齐时，预期的铁电性能，被用作一种有前景的蒸发材料。特别地，通过全反射X射线衍射仪和反射吸收红外光谱仪检查蒸发薄膜中的晶体结构和分子取向。因此，揭示了蒸发膜的晶体结构类似于聚（偏二氟乙烯）的II型晶体，聚（偏二氟乙烯）是OVDF的聚合物样品，并且分子取向垂直于基板。此外，观察到在-30 ° C和-50° C之间的衬底温度下，分子取向从垂直于衬底变为平行于衬底，并且稳定的晶体结构是II型。
A newly synthesized vinylidene fluoride oligomer (OVDF), for which ferroelectric properties are expected when the electric dipoles with the molecules are all aligned, was employed as a prospective evaporation material. Particularly, the crystal structure and molecular orientation in evaporated thin films were examined by a total reflection X-ray diffractometer and reflection absorption infrared spectroscopy. Consequently, it was revealed that the crystal structure of the evaporated films was similar to the form II crystals of poly(vinylidene fluoride) which is a polymeric sample of OVDF, and that the molecular orientations are perpendicular to the substrate. Moreover, it was observed that the molecular orientation changed from perpendicular to parallel to the substrate at the substrate temperature between -30 and -50° C and the stable crystal structure was form II.