X-ray Photon Emission Electron Microscopy (PEEM); Porphyrins and Phthalocyanines; Square Planar Magnetic Molecules; Scanning Tunneling Spectroscopy (STS); X-ray Magnetic Circular Dichroism (XMCD); Scanning Tunneling Microscopy (STM) ; X-ray Absorption Spectroscopy (XAS); Magnetochemistry On Surfaces; Molecular Spintronics; Spectro-Microscopy Correlation
Müller Vivian, Shao Feng, Baljozovic Milos, Moradi Mina, Zhang Yao, Jung Thomas, Thompson William B., King Benjamin T., Zenobi Renato, Schlüter A. Dieter (2017), Structural Characterization of a Covalent Monolayer Sheet Obtained by Two-Dimensional Polymerization at an Air/Water Interface, in Angewandte Chemie International Edition
Moradi Mina, Tulli Ludovico G., Nowakowski Jan, Baljozovic Milos, Jung Thomas A., Shahgaldian Patrick (2017), Two-Dimensional Calixarene-based Metal-Organic Coordination Networks of Tunable Crystallinity, in Angewandte Chemie International Edition
Girovsky Jan, Nowakowski Jan, Ali Md. Ehesan, Baljozovic Milos, Rossmann Harald R., Nijs Thomas, Aeby Elise A., Nowakowska Sylwia, Siewert Dorota, Srivastava Gitika, Wäckerlin Christian, Dreiser Jan, Decurtins Silvio, Liu Shi-Xia, Oppeneer Peter M., Jung Thomas A., Ballav Nirmalya (2017), Long-range ferrimagnetic order in a two-dimensional supramolecular Kondo lattice, in Nature Communications
, 8, 15388-15388.
Nowakowski Jan, Nowakowska Sylwia, Srivastava Gitika, Baljozovic Milos, Girovsky Jan, Ballav Nirmalya, Jung Thomas A. (2016), Probing the Reactivity of Functionalized Surfaces by Porphyrin Metalation, in ChemistrySelect
, 1(5), 891-895.
On-surface magneto-chemistry involves the control of spin-bearing electronic states by the interplay of chemical and physical interactions at organic-inorganic interfaces. This field of research is relevant to organic electronics and spintronics and emerged after the first observation of the ferromagnetic exchange interaction between paramagnetic molecules (Mn-tetraphenylporphyrinchloride) and a ferromagnetic Co substrate at room temperature in a X-ray Magnetic Circular Dichroism (XMCD) experiment. Significant progress has been achieved by careful spectro-microscopy correlation experiments in the sense that external ligands can be also used to control the spin-state of ad-molecules. The numerical modelling of these often reversible processes lead to an in-depth understanding of the underlying mechanisms: The chemical ligand (NO, NH3, etc) and the bottom surface substrate acting different but in competition on the electron and spin states of the ad-molecule. In this follow-up proposal - the group plans to continue to explore magneto-chemical interactions at interfaces by combining XMCD with other photoelectron based surface spectroscopy techniques like X-ray Photoelectron Spectroscopy and Ultra-violet photoelectron Spectroscopy; and scanning tunneling microscopy (STM) at variable temperatures by modifying some more of the important parameters at these organic-inorganic spin-interfaces. Furthermore the group is ready to implement new experimental techniques in collaboration with SLS-SIM staff. This involves space and time resolved combined XMCD-XPEEM (X-ray Photo-Emission Electron Microscopy), as established in successful first experiments (manuscript submitted) which provide a new access to some of the interesting questions at these interfaces like the origin of magnetisation from the interplay of the different materials. These primarily fundamental studies reveal new insight into the magneto-chemistry of model metal-organic interfaces which are relevant for molecular spintronic applications