发表机构
University of Kassel; Aarhus University; Mahindra University Hyderabad; Sorbonne Université; Indian Institute of Technology Madras; Synchrotron SOLEIL; Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel（卡塞尔大学; 奥胡斯大学; 海德拉巴马欣德拉大学; 索邦大学; 金奈印度理工学院; SOLEIL同步辐射中心; 卡塞尔大学跨学科纳米结构科学与技术中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究首次利用软X射线光电子能谱对氦纳米液滴中形成的氩、氪团簇进行测量，结合模拟证实其为近裸团簇，确立氦纳米液滴可作为分子复合物与纳米结构XPS研究的平台。
AI 中文摘要
我们报道了对超流氦纳米液滴（HNDs）内通过连续拾取掺杂原子形成的氩（Ar）和氪（Kr）团簇开展的首次软X射线光电子能谱（XPS）测量。利用单色软X射线同步辐射对Ar和Kr原子及团簇进行选择性内壳层电离（Ar 2p、Kr 3d）。在强掺杂 regime 下，电子光谱呈现出游离Ar、Kr原子及其团簇的特征。Kr团簇光谱与文献中裸Kr团簇的数据吻合良好。结合拾取过程的详细模拟，该吻合表明观测到的光谱源自几乎裸露的Ar和Kr团簇，这些团簇在聚集过程中已蒸发了大部分或全部氦。这些结果确立了HNDs作为各类分子复合物和纳米结构XPS研究的平台。
英文摘要
We report the first soft x-ray photoelectron spectroscopy (XPS) measurements of Ar and Kr clusters formed inside superfluid helium nanodroplets (HNDs) through consecutive pickup of dopant atoms. Ar and Kr atoms and clusters are selectively inner-shell ionized (Ar 2p, Kr 3d) using monochromatic soft x-ray synchrotron radiation. In the regime of strong doping, the electron spectra exhibit features characteristic of free Ar and Kr atoms as well as their clusters. The Kr cluster spectra agree well with literature data for bare Kr clusters. Backed by detailed simulations of the pickup process, this agreement indicates that the observed spectra originate from nearly bare Ar and Kr clusters, from which most or all He has evaporated in the course of cluster aggregation. These results establish HNDs as a platform for XPS of various types of molecular complexes and nanostructures.
CommentsSupplementary material included
