论文部分内容阅读
晶体早期生长的研究揭示,在某些体系中,晶体生长可能并不遵循传统路径.借由某些聚合物或生物分子的帮助,无机晶体的前驱体或纳米晶体在生长初期有可能聚集为无序的大块颗粒.这些聚集体表面晶化形成高结晶度高密度的外壳,随后完成从表面到核心的晶化过程.此逆向晶体生长机理在一些诸如沸石、钙钛矿、金属和金属氧化物等无机化合物体系中均已被发现,在其他材料体系里也将得到验证.认识这一新的晶体生长路径将给予我们更多的自由度来实现晶体形态控制,也有助于我们对于许多天然矿物形成机制的理解.本文简要回顾了最近本领域研究中一些典型逆向晶体生长的例子.
Studies of early growth of crystals reveal that in some systems, crystal growth may not follow the traditional pathways, with the help of certain polymers or biomolecules, inorganic crystal precursors or nanocrystals may aggregate as early as the beginning of growth These aggregate surfaces crystallize to form highly crystalline, high-density shells that subsequently undergo crystallization from the surface to the core.The mechanism of this reverse crystal growth is found in some materials such as zeolites, perovskites, metals and metal oxides And inorganic compounds such as systems have been found in other material systems will also be validated.Anderstanding this new crystal growth path will give us more freedom to achieve crystal morphology control, but also help us to many natural Understanding of Mineral Formation Mechanisms This article reviews briefly some recent examples of reverse crystal growth in this field of study.