Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary.
Department of Physical Chemistry and Materials Science, Interdisciplinary Excellence Centre, University of Szeged, Aradi sq. 1, Szeged 6720, Hungary.
Langmuir. 2023 Apr 11;39(14):5078-5083. doi: 10.1021/acs.langmuir.3c00079. Epub 2023 Mar 27.
We have studied the calcium phosphate precipitation reaction by producing chemical gardens in a controlled manner using a three-dimensional flow-driven technique. The injection of the phosphate containing solution into the calcium ion reservoir has resulted in structures varying from membranes to crystals. Dynamical phase diagrams are constructed by varying chemical composition and flow rates from which three different growth mechanisms have been revealed. The microstructural analysis by scanning electron microscopy and powder X-ray diffraction confirmed the morphological transition from membrane tubes to crystalline branches upon decreasing pH.
我们通过使用三维流动驱动技术以可控的方式产生化学花园来研究磷酸钙沉淀反应。将含磷酸盐的溶液注入钙离子储层中，导致结构从膜状到晶体状变化。通过改变化学成分和流速来构建动力学相图，揭示了三种不同的生长机制。通过扫描电子显微镜和粉末 X 射线衍射的微观结构分析证实了在 pH 值降低时从膜管到晶状分支的形态转变。
