Scanning tunneling microscopy‐based tip‐enhanced Raman spectroscopy (TERS) is a powerful analytical technique for surface characterization, providing both topological and chemical information with sub‐nm spatial resolution, well below the diffraction limit of light. In order to take advantage of plasmonic activity, it is necessary to use silver (Ag) probes due to their plasmonic range in the visible region. However, the Ag probe fabrication process remains challenging and is not yet standardized in practice, leading to inconsistent enhancements even for two similar types of tips prepared consecutively. In this work, we demonstrate an alternative way to reuse and recycle a plasmonic tip for distinct molecular systems inside an ultrahigh vacuum (UHV). We provide evidence of the ability to recycle tips without compromising the TERS experimental results. A long‐term preservation (>2 months) of plasmonically active probes inside UHV is demonstrated.

中文翻译：

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基于超高真空扫描隧道显微镜的尖端增强拉曼光谱的等离激子探针的制造和回收方法

基于扫描隧道显微镜的尖端增强拉曼光谱（TERS）是一种强大的表面表征分析技术，可提供亚纳米级空间分辨率的拓扑和化学信息，远低于光的衍射极限。为了利用等离子体活性，由于其在可见光区域的等离子体范围，必须使用银（Ag）探针。然而，Ag探针的制造过程仍然具有挑战性，并且在实践中尚未标准化，即使对于连续制备的两种相似类型的尖端，也导致不一致的增强。在这项工作中，我们演示了在超高真空（UHV）内针对不同分子系统重用和回收等离子体尖端的替代方法。我们提供了在不影响TERS实验结果的情况下回收吸头的能力的证据。证明了UHV内可以长期保存（> 2个月）纤溶酶活性探针。