缓慢的高电荷离子在独立的二维材料表面上的电荷交换

IF 8.2 1区 化学 Q1 CHEMISTRY, PHYSICAL
Richard A. Wilhelm
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引用次数: 3

摘要

可变电荷状态的特性使得离子对于材料表面可以暴露的其他类型的辐射是独一无二的。由于离子和表面之间的电荷交换,能量被转移到表面,并可能引发材料损坏。此外,离子电荷状态的变化改变了其在固体中的减速过程,并且在为材料分析目的测量背散射离子时具有重要意义。在过去的几十年里,广泛的研究致力于理解离子与固体的电荷交换。本文综述了这一领域的最新进展,重点介绍了高电荷态慢离子的研究进展。这类离子允许在实验中详细分析电荷交换,也使用超薄固体目标,因此可以在飞秒时间尺度上进行电子过程的实验。本文将讨论电荷交换的一般性质,并提出典型的实验技术。我还将讨论离子表面相互作用的建模和模拟的最新进展。讨论了使用独立二维材料的最新发现以及发射二次粒子的光谱结果。本文总结了表面离子电荷交换的统一图景,并基于对潜在物理的理解提出了可能的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The charge exchange of slow highly charged ions at surfaces unraveled with freestanding 2D materials

The property of a variable charge state makes ions unique to other types of radiation a material surface can be exposed to. As a consequence of charge exchange between ions and surfaces, energy is transferred to the surface and material damage may be triggered. Furthermore, a changing charge state of the ion alters its slowing down process in solids and has important implications when back-scattered ions are to be measured for material analysis purposes. Over the last decades extensive research was devoted to the understanding of ion charge exchange with solids. Here I review recent progress in this field with special emphasize on slow ions in high charge states. This class of ions allows a detailed analysis of charge exchange in experiments, which employ also ultra-thin solid targets and therefore give experimental access to electronic processes on the femtosecond timescale. In this review I will discuss general properties of charge exchange and present typical experimental techniques. I will also discuss current developments in the modelling and simulation of ion-surface interaction. Recent findings using freestanding 2D materials are discussed as well as results from spectroscopy of emitted secondary particles. The paper concludes with a unified picture of ion charge exchange at surfaces and presents possible applications based on the understanding of the underlying physics.

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来源期刊
Surface Science Reports
Surface Science Reports 化学-物理:凝聚态物理
CiteScore
15.90
自引率
2.00%
发文量
9
审稿时长
178 days
期刊介绍: Surface Science Reports is a journal that specializes in invited review papers on experimental and theoretical studies in the physics, chemistry, and pioneering applications of surfaces, interfaces, and nanostructures. The topics covered in the journal aim to contribute to a better understanding of the fundamental phenomena that occur on surfaces and interfaces, as well as the application of this knowledge to the development of materials, processes, and devices. In this journal, the term "surfaces" encompasses all interfaces between solids, liquids, polymers, biomaterials, nanostructures, soft matter, gases, and vacuum. Additionally, the journal includes reviews of experimental techniques and methods used to characterize surfaces and surface processes, such as those based on the interactions of photons, electrons, and ions with surfaces.
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