Li Lei, Kohler Felix, Dziadkowiec Joanna, Røyne Anja, Espinosa Marzal Rosa M, Bresme Fernando, Jettestuen Espen, Dysthe Dag Kristian
Physics of Geological Processes (PGP), The NJORD Centre, Department of Physics, University of Oslo, PO box 1048 Blindern, 0316 Oslo, Norway.
Environmental Engineering and Science, Department of Civil and Environmental Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States.
Langmuir. 2022 Sep 20;38(37):11265-11273. doi: 10.1021/acs.langmuir.2c01325. Epub 2022 Sep 9.
Crystallization pressure drives deformation and damage in monuments, buildings, and the Earth's crust. Even though the phenomenon has been known for 170 years, there is no agreement between theoretical calculations of the maximum attainable pressure and experimentally measured pressures. We have therefore developed a novel experimental technique to image the nanoconfined crystallization process while controlling the pressure and applied it to calcite. The results show that displacement by crystallization pressure is arrested at pressures well below the thermodynamic limit. We use existing molecular dynamics simulations and atomic force microscopy data to construct a robust model of the disjoining pressure in this system and thereby calculate the absolute distance between the surfaces. On the basis of the high-resolution experiments and modeling, we formulate a novel mechanism for the transition between damage and adhesion by crystallization that may find application in Earth and materials sciences and in conservation of cultural heritage.
结晶压力驱动古迹、建筑物和地壳中的变形与损伤。尽管这一现象已为人所知达170年之久，但在理论计算的最大可达到压力与实验测量压力之间尚无定论。因此，我们开发了一种新颖的实验技术，在控制压力的同时对纳米受限结晶过程进行成像，并将其应用于方解石。结果表明，结晶压力引起的位移在远低于热力学极限的压力下就会停止。我们利用现有的分子动力学模拟和原子力显微镜数据构建了该系统中分离压力的稳健模型，从而计算出表面之间的绝对距离。基于高分辨率实验和建模，我们提出了一种由结晶导致的损伤与粘附之间转变的新机制，该机制可能在地球科学、材料科学以及文化遗产保护中得到应用。
