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首页> 外文期刊>Crystal growth & design >BaSO_4 Crystals Grown at an Expanding Liquid-Liquid Interface in a Radial Hele-Shaw Cell Show Spontaneous Large-scale Assembly into Filaments
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BaSO_4 Crystals Grown at an Expanding Liquid-Liquid Interface in a Radial Hele-Shaw Cell Show Spontaneous Large-scale Assembly into Filaments

机译：在径向Hele-Shaw池中扩展的液界面处生长的BaSO_4晶体自发地大规模组装成细丝。

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Control over the crystallography, morphology, and spontaneous organization of ceramic crystals are important goals in advanced materials engineering with important application potential. Most studies hitherto have concentrated on static charged interfaces as templates for the controlled nucleation and growth of ceramic crystals. In this communication, we show that BaSO_4 crystals grown at a steadily expanding liquid-liquid interface populated by fatty acid molecules spontaneously organize themselves into highly linear superstructures over large length-scales. This experiment is realized in a radial Hele-Shaw cell where the liquid-liquid interfacial growth rate and consequently time scales such as arrival of surfactant molecules to the interface etc. may be readily modulated. Possible reasons for the regular assembly of barite crystals are discussed.
机译：控制陶瓷晶体的晶体学，形态和自发组织是具有重大应用潜力的高级材料工程的重要目标。迄今为止，大多数研究都集中在静电荷界面上，作为控制陶瓷晶体成核和生长的模板。在这种交流中，我们表明，在由脂肪酸分子组成的稳定扩展的液-液界面上生长的BaSO_4晶体自发地在较大的长度范围内组织成高度线性的超结构。该实验是在径向Hele-Shaw池中实现的，在该池中液-液界面的生长速率以及时间尺度（例如表面活性剂分子到达界面等）可以很容易地进行调节。讨论了重晶石晶体常规组装的可能原因。

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