Highly charged ion induced nanostructures at surfaces by strong electronic excitations

IF 8.7 2区工程技术 Q1 CHEMISTRY, PHYSICAL

Progress in Surface Science Pub Date : 2015-08-01 DOI:10.1016/j.progsurf.2015.06.001

Richard A. Wilhelm , Ayman S. El-Said , Franciszek Krok , René Heller , Elisabeth Gruber , Friedrich Aumayr , Stefan Facsko

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引用次数: 29

Abstract

Nanostructure formation by single slow highly charged ion impacts can be associated with high density of electronic excitations at the impact points of the ions. Experimental results show that depending on the target material these electronic excitations may lead to very large desorption yields in the order of a few 1000 atoms per ion or the formation of nanohillocks at the impact site. Even in ultra-thin insulating membranes the formation of nanometer sized pores is observed after ion impact. In this paper, we show recent results on nanostructure formation by highly charged ions and compare them to structures and defects observed after intense electron and light ion irradiation of ionic crystals and graphene. Additional data on energy loss, charge exchange and secondary electron emission of highly charged ions clearly show that the ion charge dominates the defect formation at the surface.

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高电荷离子在强电子激发下诱导表面纳米结构

由单个缓慢的高电荷离子撞击形成的纳米结构可能与离子撞击点的高密度电子激发有关。实验结果表明，根据目标材料的不同，这些电子激发可能导致非常大的解吸产率，每个离子大约有1000个原子，或者在撞击部位形成纳米丘。即使在超薄的绝缘膜中，也可以观察到离子撞击后纳米级孔隙的形成。在本文中，我们展示了高电荷离子形成纳米结构的最新结果，并将其与离子晶体和石墨烯在强电子和光离子照射后观察到的结构和缺陷进行了比较。关于高电荷离子的能量损失、电荷交换和二次电子发射的附加数据清楚地表明，离子电荷主导了表面缺陷的形成。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Progress in Surface Science 工程技术-物理：凝聚态物理

CiteScore

11.30

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Progress in Surface Science publishes progress reports and review articles by invited authors of international stature. The papers are aimed at surface scientists and cover various aspects of surface science. Papers in the new section Progress Highlights, are more concise and general at the same time, and are aimed at all scientists. Because of the transdisciplinary nature of surface science, topics are chosen for their timeliness from across the wide spectrum of scientific and engineering subjects. The journal strives to promote the exchange of ideas between surface scientists in the various areas. Authors are encouraged to write articles that are of relevance and interest to both established surface scientists and newcomers in the field.