Variable-temperature Scanning Probe Microscope for Ultra-High Vacuum

用于超高真空的变温扫描探针显微镜

• 批准号: 531220212
• 金额: --
• 依托单位: Technische Universität München (TUM)
• 依托单位国家: 德国
• 项目类别: Major Research Instrumentation
• 财政年份: 2023
• 资助国家: 德国
• 起止时间: 2022-12-31 至 无数据
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/531220212?language=en
• 关键词: Variable; temperature; Scanning; Probe; Microscope

The research of the group focusses on molecular nanoscience and surface physics of interfaces. The controlled environment of ultra-high vacuum enables the application of highly accurate characterisation methods, which comes at the cost of limitations posed by vacuum sample preparation. Over the last decade, a sophisticated experimental set-up named electrospray controlled ion beam deposition system (ES-CIBD) was developed in-house, which became fully operational recently. With this instrument, one of a small number existing internationally, we could expand the class of molecular systems studied to macromolecular species, which opens previously inaccessible playgrounds in the chemistry and physics of adsorbed functional molecules and their nanoscale assemblies on surfaces. To enable the further development of this novel, highly promising research direction, a dedicated and versatile characterisation tool is requested, namely a variable temperature scanning probe microscope integrating both tunnelling and atomic force (STM and AFM) measurement modes. The main purpose of the requested instrumentation is to be able to provide an optimised work flow for acquisition of (i) high-resolution topographic maps of soft-landed macromolecules (ii) characterisation of the molecular conformation, environment and molecular self-assembly, (iii) electronic maps featuring local contact potential difference or surface density of states and (iv) characterisation of nanomechanical properties and exploration of molecular manipulation protocols. This will be achieved by a combined scanning tunnelling and atomic force microscope. Additionally, the data acquisition at variable temperatures enables to capture dynamic effects, determine the thermal stability of nanoscale organisations, and activation barriers of surface reactions and processes. In this respect, an operational temperature regime of ~ 100 to 400 K is expected to provide adequate versatility to investigate the dynamics of the relevant nanoscale phenomena. Importantly, the AFM capabilities are decisive to explore (ultra-)thin films of macromolecular species and study ES-CIBD preparations on nonconductive substrates, which are frequently of scientific and technological interest or relevance.

该小组的研究集中在界面的分子纳米科学和表面物理上。超高真空的受控环境可以应用高度准确的表征方法，这是以真空样品制备构成的限制成本的应用。在过去的十年中，内部开发了一个名为电喷雾控制离子束沉积系统（ES-CIBD）的复杂实验设置，该设置最近已完全运行。借助该仪器，我们可以将研究的分子系统范围扩展到大分子物种，从而将吸附功能分子的化学和物理物理学及其在表面上的纳米级组件的化学和物理学中开放。为了进一步发展这一新型，高度有希望的研究方向，请求一种专用且多功能的特征工具，即可变的温度扫描探针显微镜既整合了隧道和原子力（STM和AFM）测量模式。请求仪器的主要目的是能够提供优化的工作流程，以获取（i）（i）软地面大分子的高分辨率地形图（II）表征分子构象，环境和分子自组装的分子构象，（iii）的分子构象，（iii）电子图，具有局部接触电位差异和摩尔型摩尔（IIV）的特性（IV）的特性（IV）的特性（iv）的特性（IV）。协议。这将通过组合的扫描隧道和原子力显微镜来实现。此外，可变温度下的数据采集可以捕获动态效应，确定纳米级组织的热稳定性以及表面反应和过程的激活障碍。在这方面，预计约100至400 K的操作温度状态将提供足够的多功能性来研究相关的纳米级现象的动力学。重要的是，AFM能力是探索大分子物种的（超）薄膜的决定性作用，并研究了经常具有科学和技术意义或相关性的非导导底物上的ES-CIBD制剂。