On November 9, Associate Professor Jiang Yuan from School of Materials Science and Technology, with Prof. Tang Ruikang from Zhejiang University and Prof. Helmut Cölfen from Konstanz University in Germany, published a paper titled 'Total Morphosynthesis of Biomimetic Prismmatic-Type CaCO 3 Thin Films' research papers, for the first time using fully synthetic means obtained imitation shellfish prism layer structure of calcium carbonate film, and to achieve the precise control of the bionic film microstructure, which obtained excellent mechanical properties.
Compared with natural or synthetic minerals, bio-minerals tend to exhibit excellent mechanical and other properties because of the specific morphology of bio-minerals with multi-order micro-nano structure, this type of micro-nano at the same time with macro-scale Structural Consistency The availability of multi-order, ordered mineral structures relies on the synergy of multiple biomass macromolecules in the biomineralization process, clarifying this synergy to better guide material chemists to the composite Controlled preparation for excellent mechanical and other properties, but in situ biomineralization is difficult to observe, and static biomineral microstructural analysis provides relatively limited information. Therefore, controllable biomimetic mineralization is still the area of material synthesis So far, most of the biomineralization studies are based on empirical knowledge, and there are only a few studies on biomimetic mineralization based on controlled route design.
Based on the spatial structure heterogeneity of bio-minerals and taking into account the liquid-phase epitaxy method in the synthesis of traditional crystalline thin film materials, the research team for the first time designed a multi-step biomimetic mineralization route and constructed successfully at room temperature liquid phase The use of polyelectrolyte stable mineral seed layer, and on this basis, the use of epitaxial mineralization method to build a prismatic layer structure of calcium carbonate.The prismatic film prepared in this study not only with the corresponding biominerals have a high degree of similarity in microstructure (Fig. Ac) .The multi-step mineralization route based on the seed layer epitaxial growth proposed in this paper is a universal method to obtain the bionic structure of prismatic layer, which also deepens the understanding of biological mineral Understanding of the mechanism
Biomimetic mineralization in the reaction environment at room temperature to achieve the precise synthesis of thin film materials with specific micro-nano structure, can not do without a variety of soft matter in the molecular and macroscopic scale range of participation and regulation.Therefore, Understanding the synergies of various soft materials in the process of material synthesis is the key to the further development of green chemistry at room temperature by material chemistry. It is also the only way to get the excellent structural and functional materials.
This work is based on the associate professor JIANG Yuan's undergraduate thesis directed by Material College and completed through inter-school and international cooperation.The first author of the dissertation is Xiao Chuanlian (now 2010 Maxma-Planck Institute of Solid State Technology Joachim Maier's Master's thesis group), Li Ming, a graduate student of materials undergraduate 2012, and Wang Bingjun (2013) undergraduates from Material College of Xiamen University (now Donal Bradley Ph.D., Department of Physics, University of Oxford, UK) ) Participated in the work.Material Science Lu Yong, Assistant Professor using theoretical simulation of the film growth mechanism was verified, Associate Professor Li Siwei and Xu Binbin School of Chemistry and Chemical Engineering participated in the transmission electron microscopy test and analysis, associate professor Zhan Da using Raman microscopy Technology to test and analyze the bionic film.The research platform is the bionics and soft matter research institute chaired by Professor Liu Xiangyang, expert of "Thousand Talents Program" of the Central Organization Department.
