Department of Physics, Tokyo Metropolitan University, 1-1 Minamioosawa, Hachiouji, Tokyo, 192-0397, Japan.
Sci Rep. 2022 Jun 15;12(1):9946. doi: 10.1038/s41598-022-13851-5.
Filamentous crystals such as whisker crystals are often seen not only in metallic liquids, but also in organic liquids and solutions. They are interesting as reinforce materials. However, it remains challenging to induce filamentous crystals due to an incomplete understanding of the mechanisms behind their formation. In this paper, we investigate filamentous crystal growth in viscous organic liquids. It is found that filamentous crystals grow via an extraordinary dynamical path, where the molecules locally evaporate to bubbles and then redeposite to the tip of growing crystalline filaments. We also succeeded in controlling whether filamentous or faceted crystal growth is selected by inducing or suppressing the bubbles.
纤维状晶体（如晶须）不仅常见于金属熔体中，也常见于有机液体和溶液中。它们作为增强材料很有趣。然而，由于对其形成机制的认识不完整，诱导纤维状晶体仍然具有挑战性。在本文中，我们研究了粘性有机液体中纤维状晶体的生长。研究发现，纤维状晶体通过一条特殊的动力学路径生长，其中分子局部蒸发成气泡，然后再沉积到生长的晶须尖端。我们还通过诱导或抑制气泡成功地控制了纤维状或面状晶体生长的选择。
