Growth And Properties Studies Of Organic Molecular Ferroelectric Thin Films

In such an information age and era of science and technology,intelligent hardware has been an indispensable part of our social life.Due to its important attributes of dielectricity,piezoelectricity,pyroelectric property,ferroelectricity,electrooptic effect,photorefractive effect and nonlinear optical effect,ferroelectric material has become a kind of significant functional material.The wide application of ferroelectric material,which possesses crucial application value in fields like information storage,micro-electronics and remote sensing,impels the rapid development of electronic information industry,implying a promising application future of it.Nowadays,the major application of ferroelectric material is inorganic ferroelectric,such as BaTiO3,PbTi03 and PbZrxTil-x03,while the expensive preparation technology and those hypertoxic waste produced during the preparation process impose restrictions on its application in new intelligent devices.Molecular ferroelectric thin film can effectively solve this problem.It not only has more outstanding attributes,but also owns its unique advantages in miniature devices.DIPAB crystals and pyridine-4-ylmethanaminium crystals have extraordinary ferroelectric property,hence this article attempts to adjust its performance and lay the foundation for miniaturization of devices by using these two kinds of crystals to produce new type thin films through simple devices and convenient preparation techniques.The new thin films produced are relatively rough,about hundreds of nanometers in size,which makes them hard to be widely applied in industrial manufacture.By using this preparation method,we can acquire single-orientation DIPAB thin film,and change its growth direction by controlling the external electric field.The pyridine-4-ylmethanaminium thin film can form continuous and highly flat ferroelectric thin film in certain areas.The unique advantage of this preparation method lies in its adoption of simple preparation technology and the fact that there are no toxic waste produced in this process,meantime,the thin film sample,to some extent,can rival its single crystal sample.