Uta Schlickum

Uta Schlickum
Max Planck Institute for Solid State Research | FKF · Department of Nanoscale Science (Kern)

About

39
Publications
4,384
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1,853
Citations
Citations since 2016
9 Research Items
874 Citations
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140
2016201720182019202020212022020406080100120140

Publications

Publications (39)
Article
Full-text available
2D materials such as graphene, hexagonal boron nitride (h‐BN), or transition metal dichalcogenides, and their heterostacks are gaining increasing interest because of their extraordinary properties, which can range from superconductivity to large charge carrier mobilities. In this paper, the electronic and structural modifications of h‐BN on Rh(111)...
Article
Full-text available
Using electrospray ion beam deposition, we collide the complex molecule Reichardt's dye (C41H30NO) at low, hyperthermal translational energy (2-50 eV) with a Cu(100) surface and image the outcome at single-molecule level by scanning tunneling microscopy. We observe bond-selective reaction induced by the translational kinetic energy. The collision i...
Article
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An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Preprint
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Elucidating mechanisms of a selective chemical reaction is fundamental towards control over its outcome. For molecules colliding on a surface, accelerating the molecule towards the surface has not been considered as a means to attain a selective reaction. Here we show bond-selective reaction of a molecule induced by its translational kinetic energy...
Article
Full-text available
Imaging of biomolecules guides our understanding of their diverse structures and functions1,2. Real-space imaging at sub-nanometre resolution using cryo-electron microscopy has provided key insights into proteins and their assemblies3,4. Direct molecular imaging of glycans—the predominant biopolymers on Earth, with a plethora of structural and biol...
Article
Full-text available
Among the prerequisites for the progress of single‐molecule‐based electronic devices are a better understanding of the electronic properties at the individual molecular level and the development of methods to tune the charge transport through molecular junctions. Scanning Tunneling Microscopy (STM) is an ideal tool not only for the characterization...
Article
Among all transition metals, palladium (Pd) has the highest density of states at the Fermi energy at low temperatures yet does not fulfill the Stoner criterion for ferromagnetism. However, close proximity to magnetism renders it a nearly ferromagnetic metal, which hosts paramagnons, strongly damped spin fluctuations. Here we compare the total and t...
Article
Full-text available
With the increasing use of thin dielectric decoupling layers to study the electronic properties of organic molecules on metal surfaces, comparative studies are needed in order to generalize findings and formulate practical rules. In this paper we study the adsorption and electronic properties of pentacene deposited onto h-BN/Rh(111) and compare the...
Article
The ability to elucidate the elementary steps of a chemical reaction at the atomic scale is important for the detailed understanding of the processes involved which is key to uncover avenues for improved reaction paths. Here, we track the chemical pathway of an irreversible direct desulfurization reaction of tetracenothiophene adsorbed on the Cu(11...
Article
Non-local switching - the "remote control"- of molecules promises more efficient processing for information technology, where fast speed of switching is vital. The surface state of the (111) facets of noble metals, a confined two-dimensional electron gas, provides a medium that enables transport of signals over large distances and hence can be used...
Article
Single molecular switches are basic device elements in organic electronics. The pentacene analog anthradithiophene (ADT) shows a fully reversible binary switching between different adsorption conformations on a metallic surface induced by a charge transfer. These transitions are activated locally in single molecules in a low temperature Scanning Tu...
Article
Magnetochemistry recently emerged as a promising approach to control addressable spin arrays on surfaces. Here we report on the binding, spatial ordering, and magnetic properties of Fe on a highly regular Co-tetraphenylporphyrin (Co-TPP) template and highlight how the Fe controls the magnetism of the Co centers. As evidenced by scanning tunneling m...
Article
Controlling light on the nanoscale in a similar way as electric currents has the potential to revolutionize the exchange and processing of information. Although light can be guided on this scale by coupling it to plasmons, that is, collective electron oscillations in metals, their local electronic control remains a challenge. Here, we demonstrate t...
Article
Full-text available
The Kondo effect arises due to the interaction between a localized spin and the electrons of a surrounding host. Studies of individual magnetic impurities by scanning tunneling spectroscopy have renewed interest in Kondo physics; however, a quantitative comparison with theoretical predictions remained challenging. Here we show that the zero-bias an...
Data
Full-text available
Supplementary Figures S1-S4, Supplementary Notes 1-3 and Supplementary References
Article
Future combinations of plasmonics with nanometer-sized electronic circuits require strategies to control the electrical excitation of plasmons at the length scale of individual molecules. A unique tool to study the electrical plasmon excitation with ultimate resolution is scanning tunneling microscopy (STM). Inelastic tunnel processes generate plas...
Article
We report on the self-assembly of Fe adatoms on a Cu(111) surface that is patterned by a metal-organic honeycomb network, formed by coordination of dicarbonitrile pentaphenyl molecules with Cu adatoms. Fe atoms landing on the metal surface are mobile and steered by the quantum confinement of the surface state electrons towards the center of the net...
Article
This Feature Article reports on the controlled formation and structure-functionality aspects of vacuum-deposited self-assembled organic and metal-organic networks at metal surfaces using ditopic linear and nonlinear molecular bricks, namely di-carbonitrile polyphenyls. Surface confined supramolecular organization of linear aromatic molecules leads...
Article
This Feature Article reports on the controlled formation and structure– functionality aspects of vacuum-deposited self-assembled organic and metal-organic networks at metal surfaces using ditopic linear and nonlinear molecular bricks, namely di-carbonitrile polyphenyls. Surface confi ned supramolecular organization of linear aromatic molecules lead...
Article
A detailed structural analysis of the surface supported self-assembly of terphenyl-4,4′′-dicarbonitrile molecules (NC−Ph3−CN) linked by Co adatoms on Ag(111) reveals different surface patterns depending on the constraints applied to the system. Without constraints, i.e., sufficient mobility and absence of space limitations at the surface, extended...
Article
The self-assembly of sexiphenyl-dicarbonitrile molecules on the Ag(111) surface is investigated using low-temperature scanning tunneling microscopy (STM) in ultrahigh vacuum. Several nanoporous networks with varying symmetry and pore size coexist on the surface after submonolayer deposition at room temperature. The different rectangular, rhombic, a...
Article
A surface-supported open metal-organic nanomesh featuring a 24 nm(2) cavity size and extending to mum domains was fabricated by Co-directed assembly of para-hexaphenyl-dicarbonitrile linker molecules in two dimensions. The metallosupramolecular lattice is thermally robust and resides fully commensurate on the employed Ag(111) substrate as directly...
Article
Full-text available
Regularly sized Fe and Co nanostructures are created using two-dimensional metal-organic honeycomb lattices as templates. They consist of dicarbonitrile-polyphenyl molecules coordinated to Co centers on Ag(111). Subsequently deposited Fe or Co atoms nucleate clusters at specific sites on top of the metal-organic lattices while leaving their hexagon...
Article
We report on a multi-technique investigation of the supramolecular organisation of N,N-diphenyl oxalic amide under differently dimensioned environments, namely three-dimensional (3D) in the bulk crystal, and in two dimensions on the Ag(111) surface as well as on the reconstructed Au(111) surface. With the help of X-ray structure analysis and scanni...
Article
Self-assembly techniques allow for the fabrication of highly organized architectures with atomic-level precision. Here, we report on molecular-level scanning tunneling microscopy observations demonstrating the supramolecular engineering of complex, regular, and long-range ordered periodic networks on a surface atomic lattice using simple linear mol...
Article
We present a systematic study of metal-organic honeycomb lattices assembled from simple ditopic molecular bricks and Co atoms on Ag(111). This approach enables us to fabricate size- and shape-controlled open nanomeshes with pore dimensions up to 5.7 nm. The networks are thermally robust while extending over microm2 large areas as single domains. Th...
Article
(Chemical Equation Presented) Intermolecular hydrogen bonding of N,N′-diphenyl oxalic amides deposited on Au(111) drives a rotation of the aromatic substituents (see picture). This low-dimensional supramolecular surface nanosystem, based on conformationally adaptive tectons, is identified by molecular-level scanning tunnelling imaging, X-ray absorp...
Article
Intermolecular hydrogen bonding of N,N′-diphenyl oxalic amides deposited on Au(111) drives a rotation of the aromatic substituents (see picture). This low-dimensional supramolecular surface nanosystem, based on conformationally adaptive tectons, is identified by molecular-level scanning tunnelling imaging, X-ray absorption measurements and first-pr...
Article
Using spin-polarized scanning tunneling microscopy with ring electrodes, the in-plane spin polarization of Mn on Fe(001) was measured. A large (square root 10 x 2 square root 10)R18.4 degrees reconstruction with a noncollinear spin structure was found. By combining maps of the spin polarization for two orthogonal in-plane directions, the vector fie...
Article
For the first time, two 2D-MOCNs expressing hexagonal topologies according to a specific local threefold coordination mode were formed on surfaces. The symmetry of the evolving coordination networks is independent of the symmetry of the substrate, which indicates that the metal–ligand coordination predominates over the substrate influences. Current...
Article
Full-text available
We studied spin-polarized tunneling through a vacuum barrier using spin-polarized scanning tunneling microscopy on Co(0001). By varying the tip-to-sample distance in a controlled way, the tunneling magnetoresistance, i.e., the tunneling current asymmetry for parallel and antiparallel configuration of tip and sample magnetization, was measured as a...
Article
Spin-dependent tunneling between a layer-wise antiferromagnet grown on a ferromagnetic substrate and a ferromagnetic tip electrode was studied using spin-polarized scanning tunneling microscopy (Sp-STM). The systems under investigation consist of thin Mn films deposited on an Fe(001) substrate, a vacuum barrier, and an Fe-coated STM electrode. The...
Chapter
We give an introduction to spin-polarized scanning tunneling microscopy (Sp-STM), a magnetic imaging technique with nanometer lateral resolution. Sp-STM allows to record constant current images which represent the electron density near the sample surface and simultaneously the spin polarization of the electron density which is related to the magnet...
Conference Paper
In this paper, a detailed analysis of the spin polarization of the surface of thin antiferromagnetic Mn films on Fe(001) is presented. Spin-polarized scanning tunneling microscopy (STM) measurements allows the study of the spin dependent tunneling current through a well defined barrier, a vacuum gap, as a function of the bias voltage. This offers t...
Article
The high lateral resolution of spin-polarized scanning tunneling microscopy allows new insights into the spin structure of antiferromagnets on the nanometer range. We demonstrate the capability to image a well-defined in-plane component of the sample spin polarization and discuss the spin structure of antiferromagnetic bct Mn in contact with the fe...
Article
We studied the spin arrangement in ultrathin antiferromagnetic Mn films in contact with a ferromagnetic Fe(001) substrate using spin-polarized scanning tunneling microscopy. Mn shows a layerwise antiferromagnetic order on Fe(001). In regions where Mn overgrows Fe steps, a frustration of the antiferromagnetic order occurs which is similar to a 180 d...
Article
We present a spin-polarized scanning tunneling microscope (Sp–STM) for imaging the magnetic in-plane component of magnetic surfaces. Magnetic in-plane sensitivity is obtained by using a ferromagnetic ring as a Sp–STM tip. By periodically switching the magnetization of the ring, the spin-dependent tunneling current between the ring and a spin-polari...
Article
In many magnetic devices, antiferromagnets in direct contact to ferromagnets play an es-sential role. Such combined systems allow the creation of artificial structures in which the magnetic properties can be tuned to technolog-ical needs. Fundamental properties concern-ing the interplay between ferromagnets and antiferromagnets are, however, not fu...

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