A5071483644- Molecular Junctions and Nanostructures
- Quantum Dots Synthesis And Properties
- Electrocatalysts for Energy Conversion
- Graphene research and applications
- 2D Materials and Applications
- Surface and Thin Film Phenomena
- Topological Materials and Phenomena
- Electrochemical Analysis and Applications
- Material Dynamics and Properties
- Electronic and Structural Properties of Oxides
- Catalysts for Methane Reforming
- MXene and MAX Phase Materials
- Sensor Technology and Measurement Systems
- Advanced Chemical Physics Studies
- Catalytic Processes in Materials Science
- Quantum and electron transport phenomena
- Surface Chemistry and Catalysis
- Fuel Cells and Related Materials
- Theoretical and Computational Physics
- Cold Atom Physics and Bose-Einstein Condensates
- High Entropy Alloys Studies
- Advanced Thermodynamics and Statistical Mechanics
- Photonic Crystals and Applications
University of Twente
2019-2024
Interface (United States)
2022
Chan Heart Rhythm Institute
2022
High-entropy materials are an emerging pathway in the development of high-activity (electro)catalysts because inherent tunability and coexistence multiple potential active sites, which may lead to earth-abundant catalyst for energy-efficient electrochemical energy storage. In this report, we identify how multication composition high-entropy perovskite oxides (HEO) contributes high catalytic activity oxygen evolution reaction (OER), i.e., key kinetically limiting half-reaction several...
Abstract We have measured the two-dimensional image potential states (IPS) of a germanene layer synthesized on Ge 2 Pt crystal using scanning tunnelling microscopy and spectroscopy. The IPS spectrum exhibits several differences as compared to pristine Ge(001). First, n = 1 peak Rydberg series has two contributions, labelled - + , respectively. at lower energy side is weaker associated mirror-symmetric state with opposite parity. appearance this indicates that interaction between substrate...
We have studied the dynamic behavior of decanethiol and air-oxidized self-assembled monolayers (SAMs) on Au(111) using time-resolved scanning tunneling microscopy at room temperature. The decanethiols arrange in a lamellae-like structure leaving herringbone reconstruction surface intact, indicating rather weak interaction between molecules surface. Successive STM images show that are structurally more stable as compared to nonoxidized molecules. This is further confirmed by performing...
In this paper, we obtain maps of the spatial tunnel barrier variations in self-assembled monolayers organosulfurs on Au(111). Maps down to sub-nanometer scale are obtained by combining topographic scanning tunneling microscopy images with dI/dz spectroscopy. The square root height is directly proportional local work function and signal. We use ratios barriers study contrast various decanethiol phases: lying-down striped β phase, dense standing-up φ oxidized decanesulfonate λ phase. compare...
The strong metal–support interaction (SMSI) is a phenomenon observed in supported metal catalyst systems which reducible oxide supports can form overlayers over the surface of active nanoparticles (NPs) under hydrogen (H 2 ) environment at elevated temperatures. SMSI has been shown to affect performance many reactions by changing type and number sites on surface. Laboratory methods for analysis nanoparticle-ensemble level are lacking mostly based indirect evidence, such as gas chemisorption....
The ionic component of the strong bond in hexagonal boron nitride (hBN) has been grossly disregarded literature.Precisely this quantity is demonstrated to govern shape monolayer hBN islands grown at high temperatures.HBN zigzag edges are charged and energetically less favorable than neutral armchair edges, contrast those purely covalent graphene.Nucleation occurs exclusively on either inner or outer corners substrate steps.Taking into account charge offers a powerful framework understand...
We present a scanning tunneling microscopy study of decanethiol on Au(001) in the low coverage regime. As expected, hex reconstruction is lifted, however, no ordered phases form. observe large areas free Au islands and covered with disordered phase. I(t) spectroscopy measurements suggest that this phase dynamic most likely comprises diffusing adatoms, molecules, and/or Au-adatom-decanethiol molecule complexes. have performed density functional theory calculations show activation barrier for...
We have studied decanethiolate self-assembled monolayers on the Au(001) surface. Planar and striped phases, as well disordered regions, formed after exposing Au surface to a decanethiol solution. The planar phases that we observe hexagonal symmetry not been previously reported for thiols lower coverage compared of other known thiol such square α phase. are similar β phase but still feature unit cells cannot be modeled archetype, is also somewhat lower. regions more dynamic ordered confirmed...
We have derived exact expressions for the domain wall free energy along three high-symmetry directions of a triangular lattice with anisotropic nearest-neighbor interactions. The undergoes an order-disorder phase transition at temperature T_{c} given by e^{-(ε_{1}+ε_{2})/2kT_{c}}+e^{-(ε_{2}+ε_{3})/2kT_{c}}+e^{-(ε_{3}+ε_{1})/2kT_{c}}=1, where ε_{1}, ε_{2}, ε_{3} are interaction energies, and ε_{1}+ε_{2}>0, ε_{2}+ε_{3}>0, ε_{3}+ε_{1}>0. Finally, we thermally induced meandering walls...
Intrinsic magnetic topological insulators (IMTIs) have a non-trivial band topology in combination with order. This potentially leads to fascinating states of matter, such as quantum anomalous Hall (QAH) and axion insulators. One the theoretically predicted IMTIs is VBi2Te4, but experimental evidence this material lacking so far. Here, we report on our attempts synthesise VBi2Te4 by molecular beam epitaxy (MBE). X-ray diffraction reveals that thermodynamic phase space reachable MBE, there no...
High-entropy materials are an emerging pathway in the development of high-activity (electro)catalysts because inherent tunability and coexistence multiple potential active sites, which may lead to earth-abundant catalyst for energy-efficient electrochemical energy storage. In this report, we identify how multication composition high-entropy perovskite oxides (HEO) contributes high catalytic activity oxygen evolution reaction (OER), i.e., key kinetically limiting half-reaction several...