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首页> 外文期刊>Annual Review of Analytical Chemistry >Mass Spectrometry as a Preparative Tool for the Surface Science of Large Molecules
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Mass Spectrometry as a Preparative Tool for the Surface Science of Large Molecules

机译：质谱作为大分子表面科学的制备工具

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摘要

Measuring and understanding the complexity that arises when nanostructures interact with their environment are one of the major current challenges of nanoscale science and technology. High-resolution microscopy methods such as scanning probe microscopy have the capacity to investigate nanoscale systems with ultimate precision, for which, however, atomic scale precise preparation methods of surface science are a necessity. Preparative mass spectrometry (pMS), defined as the controlled deposition of m/z filtered ion beams, with soft ionization sources links the world of large, biological molecules and surface science, enabling atomic scale chemical control of molecular deposition in ultrahigh vacuum (UHV). Here we explore the application of high-resolution scanning probe microscopy and spectroscopy to the characterization of structure and properties of large molecules. We introduce the fundamental principles of the combined experiments electrospray ion beam deposition and scanning tunneling microscopy. Examples for the deposition and investigation of single particles, for layer and film growth, and for the investigation of electronic properties of individual nonvolatile molecules show that state-of-the-art pMS technology provides a platform analog to thermal evaporation in conventional molecular beam epitaxy. Additionally, it offers additional, unique features due to the use of charged polyatomic particles. This new field is an enormous sandbox for novel molecular materials research and demands the development of advanced molecular ion beam technology.
机译：衡量和理解纳米结构与其环境相互作用时出现的复杂性是纳米科学技术当前面临的主要挑战之一。高分辨率显微镜方法（例如扫描探针显微镜）具有以极高的精度研究纳米级系统的能力，但是为此，必须进行表面科学的原子级精确制备方法。制备质谱（pMS），定义为m / z过滤后的离子束的受控沉积，具有软电离源，可连接大型生物分子和表面科学领域，从而能够在超高真空（UHV）中进行原子级化学控制分子沉积。在这里，我们探索高分辨率扫描探针显微镜和光谱学在表征大分子的结构和性质中的应用。我们介绍了结合实验电喷雾离子束沉积和扫描隧道显微镜的基本原理。单个粒子的沉积和研究，层和膜的生长以及单个非易失性分子的电子性质的研究示例表明，最新的pMS技术提供了类似于常规分子束外延中热蒸发的平台。此外，由于使用带电的多原子颗粒，它还提供了其他独特的功能。这个新领域是用于新型分子材料研究的巨大沙箱，需要先进的分子离子束技术的发展。

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