Guan Yebin, Wang Xiaohong, Cao Weicheng, Zhou Gentao
Anhui Key Laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing 246011, China.
CAS Key Laboratory of Crust-Mantle Materials and Environments, School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China.
Materials (Basel). 2018 Nov 16;11(11):2300. doi: 10.3390/ma11112300.
Developing a simple morphology-controlled synthesis of metastable vaterite is a goal in the field of materials research. In this paper, we successfully synthesized flower-like dendritic vaterite crystals using a microwave method with 2-naphthaleneacetic acid (2-NAA) and ethylene glycol (EG) as the regulating additives. The results show that the morphology of vaterite could be regulated by inducing a monolayer or multilayer flower-like structure with the appropriate choice of regulators. Interestingly, the microstructure analysis showed that such flower-like vaterite dendrites host two different kinds of crystal cells. The negative carbonate 2-NAA effectively neutralized the charge of the vaterite (001) plane, resulting in the crystalline growth along the direction parallel to it and inducing a flower-like morphology. This experiment reveals an alternative approach to controlling hierarchical structures during the synthesis of similar classes of minerals.
开发一种简单的、可控制亚稳态球霰石形态的合成方法是材料研究领域的一个目标。在本文中，我们以2-萘乙酸（2-NAA）和乙二醇（EG）作为调控添加剂，采用微波法成功合成了花状树枝状球霰石晶体。结果表明，通过适当选择调节剂诱导形成单层或多层花状结构，可以调控球霰石的形态。有趣的是，微观结构分析表明，这种花状球霰石树枝晶包含两种不同的晶胞。带负电荷的碳酸根2-NAA有效地中和了球霰石（001）面的电荷，导致晶体沿与其平行的方向生长，并诱导出花状形态。该实验揭示了一种在合成类似矿物时控制分级结构的替代方法。
