Self-organisation and growth of organic molecules on oxide surfaces

funCOS4旨在深入了解中型有机分子在各种单晶氧化物衬底、金属单晶外延氧化膜或纳米级氧化体系（主要是纳米颗粒）上的膜生长和吸附动力学。这包括各种相互作用的各个方面，特别是分子间相互作用和分子-基质相互作用的相互作用，它们控制着超薄有机薄膜的生长。利用探针，可以提供从原子到介观长度尺度的信息，可以访问从亚单层到多层的吸附有机膜的结构特性。衍射技术（XRD， LEED, SAXS/SANS， GISAXS， XRR）提供的结构信息精度优于0.1 Angström，现场研究将提供薄膜形成动力学的途径。表面敏感电子显微镜工具（PEEM， LEEM， XPEEM）将为氧化物衬底和有机薄膜提供真实空间信息。将遵循两种不同的制备路线，即真空升华制备和湿化学方法沉积薄膜。后者利用强烈的分子-衬底相互作用诱导在平面衬底或纳米颗粒模板结构上形成sam。因此，该项目将弥补在特高压条件下制备的模型系统与溶剂分子沉积之间的差距，从而提供了在没有昂贵硬件的情况下制备高度有序分子系统的潜在途径。具体来说，我们将探索吸附超薄膜的垂直和横向结构、吸附分子的取向、分子-氧化物界面的结构特性、受控的衬底修饰及其对有机薄膜形成、薄膜生长模式、成核和平面氧化衬底和纳米颗粒氧化物的远程相互作用的影响。现场调查将进一步深入了解成膜动力学。为了与其他官能团达到最佳一致性，研究将集中在MgO， Co氧化物和TiO2作为模型系统，包括表面修饰的底物和各自的纳米颗粒系统。

funCOS4 aims at a deeper understanding of film growth and adsorption kinetics of medium-sized organic molecules on various single-crystalline oxide substrates, epitaxial oxide films on metal single crystals or nanoscaled oxidic systems (mainly nanoparticles). This includes aspects of various interactions, in particular the interplay of intermolecular interactions and molecule-substrate interactions, which are governing the growth of ultrathin organic films. Utilizing probes, which offer information ranging from the atomic to the mesoscopic length scales, the structural properties of the adsorbed organic film from the submonolayer to the multilayer regime can be accessed. Diffraction techniques (XRD, LEED, SAXS/SANS, GISAXS, XRR) deliver structural information with accuracies better than 0.1 Angström and in-situ studies will offer access to film formation kinetics. Surface-sensitive electron microscopic tools (PEEM, LEEM, XPEEM) will offer real-space information for both, oxide substrates and organic thin films. Two different preparation routes will be followed, i.e., preparation by vacuum sublimation and film deposition by wet chemical routes. The latter uses strong molecule-substrate-interactions to induce the formation of SAMs on planar substrates or nanoparticulate template structures. Thus, the project will bridge the gap from model systems prepared under UHV conditions to molecular depositions from solvents, thus offering potential pathways to prepare highly ordered molecular systems without costly hardware. Specifically, we will explore the perpendicular and lateral structures of adsorbed ultrathin films, the orientation of adsorbed molecules, the structural properties of the molecule-oxide interface, controlled substrate modifications and their influence on organic film formation, film growth modes, nucleation and long-range interactions on planar oxidic substrates and for nanoparticulate oxides. In-situ investigations will furthermore allow the insight into film formation kinetics. For optimum coherence with the other funCOS groups, the studies will concentrate on MgO, Co oxides and TiO2 as model systems including surface-modified substrates and the respective nanoparticulate systems.