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Controlling CaCO3 nucleation with halogen-terminated self-assembled monolayers
Applied Surface Science ( IF 6.3 ) Pub Date : 2023-08-09 , DOI: 10.1016/j.apsusc.2023.158223
Luyu Shang , Guoying Bai

Although understanding and controlling CaCO3 nucleation is crucial for both biological and artificial mineralization, there are some fundamental issues, including the impact of surface free energy on CaCO3 nucleation remains unclear. Furthermore, as the abundant elements in nature, halogens can incorporate into organic matrices and participate in the nucleation process. However, their specific influences on CaCO3 nucleation are poorly understood. Here, we investigate how halogen chemistry surfaces control CaCO3 nucleation through constructing halogen (F3, Cl, Br, I)-terminated self-assembled monolayers as model surfaces and measuring the nucleation kinetic/thermodynamic parameters of CaCO3 on them for the first time. The results demonstrate that the abilities of halogen chemistry surfaces to promote CaCO3 nucleation are determined by either thermodynamic or kinetic control, depending on the supersaturation range. Under thermodynamic control, the CaCO3 nucleation efficiency on various halogen chemistry surfaces decreases in the order of F3, Cl, Br and I, which is consistent with the increasing order of surface free energy. Our work sheds new lights on the correlation between materials’ abilities to control CaCO3 nucleation and their surface free energies, and provides a simple strategy for controlling CaCO3 nucleation.



中文翻译:

用卤素封端的自组装单分子层控制 CaCO3 成核

尽管理解和控制CaCO 3成核对于生物和人工矿化都至关重要,但仍存在一些基本问题,包括表面自由能对CaCO 3成核的影响仍不清楚。此外,作为自然界中丰富的元素,卤素可以结合到有机基体中并参与成核过程。然而,它们对CaCO 3成核的具体影响却知之甚少。在这里,我们通过构建卤素(F 3,Cl,Br,I)封端的自组装单分子层作为模型表面并测量CaCO 3 的成核动力学/热力学参数,研究卤素化学表面如何控制CaCO 3成核。第一次接触他们。结果表明,卤素化学表面促进CaCO 3成核的能力由热力学或动力学控制决定,具体取决于过饱和范围。在热力学控制下,各种卤素化学表面上的CaCO 3成核效率按F 3、Cl、Br和I的顺序降低,这与表面自由能的增加顺序一致。我们的工作为材料控制CaCO 3成核的能力与其表面自由能之间的相关性提供了新的线索,并提供了控制CaCO 3成核的简单策略。

更新日期:2023-08-09
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