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Growth inhibition of sodium chloride crystals by anticaking agents: In situ observation of step pinning

机译:防结块剂抑制氯化钠晶体的生长:步骤固定的原位观察

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We have determined how the growth of sodium chloride crystals is inhibited by the anticaking agents ferrocyanide and iron(III) meso-tartaric acid. Using in situ atomic force microscopy, we show how steps flow on clean crystals and how the step flow is inhibited by the anticaking agents. At submonolayer coverages, steps are temporarily pinned, whereas at higher coverages, no step movement is observed at all. Finally, we found that the two anticaking agents influence the surface morphologies of treated crystals differently, providing a possible explanation for the observation that powders treated with ferrocyanide flow freely whereas those treated with iron meso-tartaric acid show slip-stick behavior.
机译:我们已经确定了抗结块剂亚铁氰化物和铁(III)中酒石酸如何抑制氯化钠晶体的生长。使用原位原子力显微镜,我们展示了台阶如何在干净的晶体上流动以及台阶如何被抗结块剂抑制。在亚单层覆盖范围内,临时固定了台阶,而在较高覆盖范围下,根本没有观察到台阶运动。最后,我们发现这两种抗结块剂对处理过的晶体的表面形态有不同的影响,这为亚铁氰化物处理过的粉末自由流动而铁中-酒石酸处理过的粉末表现出粘滑行为提供了可能的解释。

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