Observation of the fcc-to-hcp transition in ensembles of argon nanoclusters.
Observation of the fcc-to-hcp transition in ensembles of argon nanoclusters.
复制标题
观察氩纳米团簇中 fcc 到 hcp 的转变。
DOI：
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发表时间：
2012
影响因子：
8.6
通讯作者：
V. Kiryukhin
中科院分区：
文献类型：
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作者：
N. Krainyukova;R. Boltnev;E. Bernard;V. Khmelenko;D. M. Lee;V. Kiryukhin
在低真空下使用 X 射线衍射研究了弱相互作用的氩纳米团簇的宏观系综。随着温度升高，团簇通过聚变生长，当团簇尺寸接近约 10(5) 个原子时，它们的结构从本质上的面心立方 (fcc) 转变为六方密堆积。该转变涉及中间正交相。这些数据证实了现有的理论预测。他们还表明，生长动力学和空间限制可能在散装稀有气体固体的面心立方结构的形成中发挥重要作用，这仍然令人费解。
Macroscopic ensembles of weakly interacting argon nanoclusters are studied using x-ray diffraction in low vacuum. As the clusters grow by fusion with increasing temperature, their structure transforms from essentially face-centered cubic (fcc) to hexagonal close packed as the cluster size approaches ~10(5) atoms. The transformation involves intermediate orthorhombic phases. These data confirm extant theoretical predictions. They also indicate that growth kinetics and spatial constraints might play an important role in the formation of the fcc structure of bulk rare-gas solids, which still remains puzzling.