Markus Heyde
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View article: Low‐ Temperature Transformations in Amorphous Silica Bilayers on Ru(0001) After Crystal‐Glass Transition: Closer Look
Low‐ Temperature Transformations in Amorphous Silica Bilayers on Ru(0001) After Crystal‐Glass Transition: Closer Look Open
The crystal‐glass transition concerning silicon dioxide has been a topic of intense research. It has been possible to prepare a bilayer silica film on a metal substrate and study the corresponding transition in real space using scanning tu…
View article: Writing with Molecules: Tip-Induced Local Chemisorption of N-Heterocyclic Olefins on Cu(111)
Writing with Molecules: Tip-Induced Local Chemisorption of N-Heterocyclic Olefins on Cu(111) Open
N-Heterocyclic olefins (NHOs), possessing highly polarizable electron-rich double bonds, have recently received increased attention as promising ligands to modify the properties of various surfaces such as Cu, Au, and Si. This work demonst…
View article: Structure Sensitivity and Catalyst Restructuring for CO<sub>2</sub> Electro-Reduction on Copper
Structure Sensitivity and Catalyst Restructuring for CO<sub>2</sub> Electro-Reduction on Copper Open
Cu is the most promising metal catalyst for CO 2 electroreduction (CO 2 RR) to multi-carbon products, but the structure sensitivity of the reaction and the stability versus restructuring of the catalyst surface under reaction conditions ar…
View article: N‐Heterocyclic Olefins on a Metallic Surface – Adsorption, Orientation, and Electronic Influence
N‐Heterocyclic Olefins on a Metallic Surface – Adsorption, Orientation, and Electronic Influence Open
N‐Heterocyclic olefins (NHOs), possessing highly polarizable and remarkably electron‐rich double bonds, have been effectively utilized as exceptional anchors for surface modifications. Herein, the adsorption, orientation, and electronic pr…
View article: Structure Sensitivity and Catalyst Restructuring for CO2 Electro-reduction on Copper
Structure Sensitivity and Catalyst Restructuring for CO2 Electro-reduction on Copper Open
Cu is the most promising metal catalyst for CO2 electroreduction (CO2RR) to multi-carbon products, but the structure sensitivity of the reaction and the stability versus restructuring of the catalyst surface under reaction conditions are s…
View article: The Influence of Mesoscopic Surface Structure on the Electrocatalytic Selectivity of CO<sub>2</sub> Reduction with UHV-Prepared Cu(111) Single Crystals
The Influence of Mesoscopic Surface Structure on the Electrocatalytic Selectivity of CO<sub>2</sub> Reduction with UHV-Prepared Cu(111) Single Crystals Open
The key role of morphological defects (e.g., irregular steps and dislocations) on the selectivity of model Cu catalysts for the electrocatalytic reduction of CO2 (CO2RR) is illustrated here. Cu(111) single-crystal surfaces prepared under u…
View article: The real honeycomb structure—From the macroscopic down to the atomic scale
The real honeycomb structure—From the macroscopic down to the atomic scale Open
The honeycomb’s eponymous structure is omnipresent in our every day lives. We want to provide some inspiration to perform structural analyses of these structures and to draw comparisons between them. In the present study, we detect honeyco…
View article: Promoted Thermal Reduction of Copper Oxide Surfaces by N-Heterocyclic Carbenes
Promoted Thermal Reduction of Copper Oxide Surfaces by N-Heterocyclic Carbenes Open
The influence of metallic and oxide phases coexisting on surfaces is of fundamental importance in heterogeneous catalysis. Many reactions lead to the reduction of the oxidized areas, but the elucidation of the mechanisms driving these proc…
View article: Covalent Adsorption of N-Heterocyclic Carbenes on a Copper Oxide Surface
Covalent Adsorption of N-Heterocyclic Carbenes on a Copper Oxide Surface Open
Tuning the properties of oxide surfaces through the adsorption of designed ligands is highly desirable for several applications, such as catalysis. N-Heterocyclic carbenes (NHCs) have been successfully employed as ligands for the modificat…
View article: Observation of the Boson Peak in a 2D Material
Observation of the Boson Peak in a 2D Material Open
The boson peak is an excess in the phonon density of states relative to the Debye Model, which occurs at frequencies below the Debye limit. It is present in most amorphous materials and, as was recently shown, can sometimes be found also i…
View article: A high-speed variable-temperature ultrahigh vacuum scanning tunneling microscope with spiral scan capabilities
A high-speed variable-temperature ultrahigh vacuum scanning tunneling microscope with spiral scan capabilities Open
We present the design and development of a variable-temperature high-speed scanning tunneling microscope (STM). The setup consists of a two-chamber ultra-high vacuum system, including a preparation and a main chamber. The preparation chamb…
View article: Growth of N‐Heterocyclic Carbene Assemblies on Cu(100) and Cu(111): From Single Molecules to Magic‐Number Islands
Growth of N‐Heterocyclic Carbene Assemblies on Cu(100) and Cu(111): From Single Molecules to Magic‐Number Islands Open
N‐Heterocyclic carbenes (NHCs) have superior properties as building blocks of self‐assembled monolayers (SAMs). Understanding the influence of the substrate in the molecular arrangement is a fundamental step before employing these ligands …
View article: Mesoscopic Structures and Coexisting Phases in Silica Films
Mesoscopic Structures and Coexisting Phases in Silica Films Open
Silica films represent a unique two-dimensional film system, exhibiting both crystalline and vitreous forms. While much scientific work has focused on the atomic-scale features of this film system, mesoscale structures can play an importan…
View article: Dynamics in the O(2 × 1) adlayer on Ru(0001): bridging timescales from milliseconds to minutes by scanning tunneling microscopy
Dynamics in the O(2 × 1) adlayer on Ru(0001): bridging timescales from milliseconds to minutes by scanning tunneling microscopy Open
The dynamics within an O(2 × 1) adlayer on Ru(0001) is studied by density functional theory and high-speed scanning tunneling microscopy.
View article: Variation of bending rigidity with material density: bilayer silica with nanoscale holes
Variation of bending rigidity with material density: bilayer silica with nanoscale holes Open
Helium atom scattering experiments on a “holey” silica bilayer film reveal that the bending rigidity of the material, extracted from phonon dispersion curves, decreases with decreasing material density.
View article: Structure and registry of the silica bilayer film on Ru(0001) as viewed by LEED and DFT
Structure and registry of the silica bilayer film on Ru(0001) as viewed by LEED and DFT Open
Structure and registry of the silica bilayer film with respect to its supporting metal substrate revealed by low energy electron diffraction.
View article: Spiral high-speed scanning tunneling microscopy: Tracking atomic diffusion on the millisecond timescale
Spiral high-speed scanning tunneling microscopy: Tracking atomic diffusion on the millisecond timescale Open
Scanning tunneling microscopy (STM) is one of the most prominent techniques to resolve atomic structures of flat surfaces and thin films. With the scope to answer fundamental questions in physics and chemistry, it was used to elucidate num…
View article: Continuous network structure of two-dimensional silica across a supporting metal step edge: An atomic scale study
Continuous network structure of two-dimensional silica across a supporting metal step edge: An atomic scale study Open
The network structure of a silica bilayer film at a monolayer-bilayer transition and across a supporting metal step edge was studied at the atomic scale by scanning tunneling microscopy. The ring size distribution, ring-ring distances, and…
View article: Erratum: Bending Rigidity of 2D Silica [Phys. Rev. Lett. <b>120</b>, 226101 (2018)]
Erratum: Bending Rigidity of 2D Silica [Phys. Rev. Lett. <b>120</b>, 226101 (2018)] Open
This corrects the article DOI: 10.1103/PhysRevLett.120.226101.
View article: Development of a single crystal sample holder for interfacing ultrahigh vacuum and electrochemical experimentation
Development of a single crystal sample holder for interfacing ultrahigh vacuum and electrochemical experimentation Open
Electrocatalyst surfaces prepared under ultrahigh vacuum (UHV) conditions can create model surfaces to better connect theoretical calculations with experimental studies. The development of a single crystal sample holder and inert electroch…
View article: Identifying Structure–Selectivity Correlations in the Electrochemical Reduction of CO<sub>2</sub>: A Comparison of Well‐Ordered Atomically Clean and Chemically Etched Copper Single‐Crystal Surfaces
Identifying Structure–Selectivity Correlations in the Electrochemical Reduction of CO<sub>2</sub>: A Comparison of Well‐Ordered Atomically Clean and Chemically Etched Copper Single‐Crystal Surfaces Open
The identification of the active sites for the electrochemical reduction of CO 2 (CO 2 RR) to specific chemical products is elusive, owing in part to insufficient data gathered on clean and atomically well‐ordered electrode surfaces. Here,…
View article: Identifying Structure–Selectivity Correlations in the Electrochemical Reduction of CO<sub>2</sub>: A Comparison of Well‐Ordered Atomically Clean and Chemically Etched Copper Single‐Crystal Surfaces
Identifying Structure–Selectivity Correlations in the Electrochemical Reduction of CO<sub>2</sub>: A Comparison of Well‐Ordered Atomically Clean and Chemically Etched Copper Single‐Crystal Surfaces Open
The identification of the active sites for the electrochemical reduction of CO 2 (CO 2 RR) to specific chemical products is elusive, owing in part to insufficient data gathered on clean and atomically well‐ordered electrode surfaces. Here,…
View article: Frontispiece: Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support
Frontispiece: Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support Open
The thinnest possible films of the glass-forming materials silica and germania were so far investigatd by employing scanning probe microscopy and density functional theory calculations. A more general comprehension of the network structure…
View article: Structure of a Silica Thin Film on Oxidized Cu(111): Conservation of the Honeycomb Lattice and Role of the Interlayer
Structure of a Silica Thin Film on Oxidized Cu(111): Conservation of the Honeycomb Lattice and Role of the Interlayer Open
There is a crucial role of the metal-oxide interface in determining the growth ofsilica thin films. However, only a few metallic substrates have been explored so far.In previous studies, metal substrates exhibiting unreconstructed surfaces…
View article: Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support
Growth and Atomic‐Scale Characterization of Ultrathin Silica and Germania Films: The Crucial Role of the Metal Support Open
The present review reports on the preparation and atomic‐scale characterization of the thinnest possible films of the glass‐forming materials silica and germania. To this end state‐of‐the‐art surface science techniques, in particular scann…
View article: A Silica Bilayer Supported on Ru(0001): Following the Crystalline‐to Vitreous Transformation in Real Time with Spectro‐microscopy
A Silica Bilayer Supported on Ru(0001): Following the Crystalline‐to Vitreous Transformation in Real Time with Spectro‐microscopy Open
The crystalline‐to‐vitreous phase transformation of a SiO 2 bilayer supported on Ru(0001) was studied by time‐dependent LEED, local XPS, and DFT calculations. The silica bilayer system has parallels to 3D silica glass and can be used to un…
View article: A Silica Bilayer Supported on Ru(0001): Following the Crystalline‐to Vitreous Transformation in Real Time with Spectro‐microscopy
A Silica Bilayer Supported on Ru(0001): Following the Crystalline‐to Vitreous Transformation in Real Time with Spectro‐microscopy Open
The crystalline‐to‐vitreous phase transformation of a SiO 2 bilayer supported on Ru(0001) was studied by time‐dependent LEED, local XPS, and DFT calculations. The silica bilayer system has parallels to 3D silica glass and can be used to un…
View article: Chapter model systems in heterogeneous catalysis at the atomic level: a personal view
Chapter model systems in heterogeneous catalysis at the atomic level: a personal view Open
The review presents an overview of studies in the surface science of oxide and related surfaces with an emphasis of the studies performed in the authors’ group. Novel instruments and technique developments, as well as their applications ar…