摘要
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。
The so-called bio-inspired ceramics processing is usually a solution-based process that mimicks the nature′s template-mediated mineralization method, and has been developed to produce ceramic thin films, to create specific microstructures, to fabricate patterns through site-selective deposition, to control the crystallization, or to achieve intelligent functions such as self-healing and self-cleaning. This benign, low-temperature process is carried out in (aqueous) solution, and can be easily applied to many surfaces, from ceramics, glass, fibers, to flexible organic membranes, some of which may be incapable to be used at high temperatures. Two key points are involved in this process: surface modification and solution conditions. In this review, surface modification with self-assembled monolayers, and control of solution conditions such as nucleation/growth in aqueous solutions, are described for SrTiO_3 as an example.
出处
《陕西科技大学学报（自然科学版）》
2004年第5期48-59,共12页
Journal of Shaanxi University of Science & Technology
