Surface modifications of BaF2 and CaF2 single crystals by slow highly charged ions
Surface modifications of BaF2 and CaF2 single crystals by slow highly charged ions
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DOI：
10.1016/j.apsusc.2014.03.083
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发表时间：
2014-08
影响因子：
6.7
通讯作者：
A. S. El-Said;R. Heller;R. Wilhelm;S. Facsko;F. Aumayr
中科院分区：
文献类型：
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作者：
A. S. El-Said;R. Heller;R. Wilhelm;S. Facsko;F. Aumayr
固体表面的离子辐照被认为是材料纳米结构化的有前途和强大的技术之一。最近，慢高电荷态离子（HCI）在各种固体中产生表面纳米结构方面显示出了它们的潜力。本文主要研究了盐酸对BaF_2和CaF_2单晶的表面改性。尽管这两种材料都属于具有相同晶体结构的碱土氟化物，但它们对HCl诱导的纳米结构表现出不同的敏感性。我们讨论了在这两种材料和它们的依赖于潜在的和动能沉积的HCl诱导的nanohillocks和蚀坑的创建的相似性和差异。此外，我们将结果与快速重离子（SHI）诱导的修饰进行比较，以更好地理解离子氟化物单晶中纳米结构的形成机制。
Ion-irradiation of solid surfaces is considered as one of the promising and powerful techniques for material nanostructuring. Recently, slow highly charged ions (HCI) have shown their potential in creating surface nanostructures in various solids. Here, we focus on the surface modifications of BaF2and CaF2single crystals by HCI. Despite the fact that both materials belong to alkaline-earth fluorides with the same crystalline structure, they exhibit different sensitivity for HCI-induced nanostructure. We discuss similarities and differences for the creation of HCI-induced nanohillocks and etch pits in both materials and their dependence on potential and kinetic energy deposition. Furthermore, we compare the results with modifications induced by swift heavy ions (SHI), in order to reach a better understanding of the mechanisms responsible for the creation of nanostructures in ionic fluoride single crystals.