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介绍了一种新的功能陶瓷薄膜制备方法———仿生法。该方法不同于传统的湿化学方 法,如水热合成法、熔胶凝胶法、电化学法等,其突出特点是无外加电场,不需要调制熔胶或者 凝胶,可以在常温常压下合成。该方法涉及两个关键点:基板表面的修饰和溶液条件的控制。 我们在基板(单晶硅,玻璃等)的表面通过化学吸附的方式生长了一层自组织单分子层,然后将 这层单分子层部分暴露在紫外光下,使暴露部分发生光化学反应,从而生成与未暴露部分不同 的新的官能团。以此为模板,在适合的溶液条件下(溶液的过饱和度等),通过溶液与模板表面 官能团之间的选择性的物理化学作用,实现了从溶液中直接制备位置、形貌、结晶形态等可控 的功能陶瓷薄膜。作者以SrTiO3为例简单介绍了这种新的合成方法。
A new method of preparation of functional ceramic film is introduced - bionic method. The method is different from the traditional wet chemical methods, such as hydrothermal synthesis, melt gel method, electrochemical method, the outstanding feature is no external electric field, do not need to adjust the melt or gel, can be synthesized at room temperature and pressure . The method involves two key points: the modification of the surface of the substrate and the control of the solution conditions. We have grown a layer of self-assembled monolayer on the surface of the substrate (single crystal silicon, glass, etc.) by chemisorption and then exposing the monolayer partially to UV light to photochemically react the exposed part A new functional group is generated that is different from the unexposed part. Using this as a template, the selective physicochemical interaction between the solution and the functional groups on the surface of the template, under suitable solution conditions (supersaturation of the solution, etc.), enables the direct preparation of the position, morphology, crystalline morphology from the solution Controllable functional ceramic film. The author of SrTiO3 as an example of a simple introduction of this new synthesis.