Nonfaceted Growth of (111)-Oriented Epitaxial Alkali-Halide Crystals via an Ionic Liquid Flux in a Vacuum
Nonfaceted Growth of (111)-Oriented Epitaxial Alkali-Halide Crystals via an Ionic Liquid Flux in a Vacuum
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DOI：
10.1021/cg100493t
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发表时间：
2010-08-01
影响因子：
3.8
通讯作者：
Matsumoto, Yuji
中科院分区：
文献类型：
--
作者：
Kato, Shun;Takeyama, Yoko;Matsumoto, Yuji
采用一种新型的助熔剂介导外延真空沉积方法，以离子液体为助熔剂，在蓝宝石单晶衬底上实现了（111）取向KBr晶体的无刻面外延生长。结果表明，在较高的生长温度下，离子液体可以作为助熔剂促进KBr晶体的生长，并稳定其不稳定的极性（111）面，而不会造成晶体表面的小面化。即使在蒸发剩余的离子液体以将其从KBr晶体中除去之后，原子级平坦的（111）表面也可以被保留而没有重新刻面。
Nonfaceted growth of (111)-oriented epitaxial KBr crystals on sapphire single crystal substrates has been achieved using a novel vacuum deposition method of flux-mediated epitaxy, involving the use of ionic liquids as a flux. It was found that the ionic liquid could act as a flux to promote the growth of KBr at higher growth temperatures and to stabilize its unstable polar (111) face with no faceting of the crystal surface. Even after evaporation of the remaining ionic liquid to remove it from the KBr crystals, the atomically flat (111) surface could be preserved without refaceting.