Alkyne-based Carbon Nanomaterials: On-surface Synthesis and Complementary Characterization.

该项目旨在用炔基前体在表面受限的条件下构建先进的共价纳米材料，并在单分子水平上表征其结构、化学和电子性质。通过结合提供互补信息的实验方法，将获得在超高真空条件下制备的定义良好的样品的性能所需的全面见解。更具体地说，低温（5 K）扫描探针显微镜产生的具有亚分子特征的真实空间图像将通过基于同步加速器的高能量分辨率x射线光谱技术进行修正。通过系统地研究样品制备过程中涉及的各个方面，我们计划深入了解前驱体设计、表面模板效应和反应激发类型对所得纳米材料质量的影响。此外，还将研究其他耦合方案和制造方法，例如原子隧穿和催化adatom介导反应或炔-卤素结合光子或电子激发的方案。积累的知识将为原子精确制造新型碳基纳米材料提供基础，这些材料具有令人印象深刻的、可调的特性和功能，非常适合未来的纳米技术应用，如高机械强度和柔韧性、极端载流子迁移率和化学通用性。

This project aims at the surface-confined construction of advanced covalent nanomaterials from alkyne-based precursors and the characterization of their structural, chemical, and electronic properties at the single-molecule level. The desired comprehensive insight in the properties of the well-defined samples prepared under ultra-high vacuum conditions will be obtained by combining experimental methods providing complementary information. More specifically, low-temperature (5 K) scanning probe microscopy yielding real space images with submolecular features will be amended by synchrotron-based X-ray spectroscopic techniques with high energy resolution. By systemically investigating the involved aspects of the sample preparation process, we plan to achieve a profound understanding of the influence of the precursor design, the surface templating effect, and the reaction excitation type on the quality of the resulting nanomaterials. Furthermore, alternative coupling schemes and fabrication approaches will be investigated, such as atom tunneling- and catalytic adatom-mediated reactions or alkyne-halogen protocols combined with photon or electron excitation. The accumulated knowledge will provide the foundation for the atom-precise fabrication of novel carbon-based nanomaterials with impressive, tunable characteristics and functionalities highly desirable for future nanotechnology applications like high mechanical strength and flexibility, extreme charge carrier mobilities, and chemical versatility.