Can every substance exist as an amorphous solid?
Can every substance exist as an amorphous solid?
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每种物质都可以以无定形固体形式存在吗？
DOI：
10.1016/j.jnoncrysol.2021.121254
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发表时间：
2022
影响因子：
3.5
通讯作者：
Lu A.K.A.
中科院分区：
文献类型：
--
作者：
Nishio Kengo;Lu A.K.A.
许多物质可以以无定形固体形式存在，但是否所有物质都可以以无定形形式存在是一个悬而未决的问题。有人提出，纯非晶态氩的演示是非晶态普遍性最有说服力的证据。然而，理论研究表明，通过液氩淬火形成的非晶结构并不是固体，因为它会立即结晶。在这里，我们证明了包含三壳二十面体团簇的非晶态氩模型可以在低于 7 K 的温度下存在超过一天，支持了非晶态的普遍性。我们的研究结果不仅为制造尚未转化为非晶态的纯惰性气体和面心立方金属等物质的非晶态固体开辟了新的视角，而且还为增强现有非晶态固体的稳定性开辟了新的前景。
Many substances can exist as amorphous solids, but it is an open question whether or not all substances can be put into the amorphous form. It has been proposed that the demonstration of pure amorphous argon is the most convincing evidence for the universality of the amorphous state. However, theoretical studies have shown that a non-crystalline structure made by quenching liquid argon is not a solid, for it crystallizes immediately. Here, we demonstrate that amorphous argon model containing triple-shell icosahedral clusters can exist for more than one day below 7 K, supporting the universality of the amorphous state. Our findings open new perspectives not only for making amorphous solids of substances such as pure noble gases and fcc metals which have not yet been put into the amorphous form but also for enhancing the stability of existing amorphous solids.