A5024210945- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Crystallography and molecular interactions
- Advanced Electron Microscopy Techniques and Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Electron and X-Ray Spectroscopy Techniques
- Cultural Heritage Materials Analysis
- Pigment Synthesis and Properties
- Enzyme Structure and Function
- 2D Materials and Applications
- Semiconductor materials and devices
- Advanced X-ray Imaging Techniques
- High-pressure geophysics and materials
- Chalcogenide Semiconductor Thin Films
- Graphene research and applications
- Crystallography and Radiation Phenomena
- Magnetism in coordination complexes
- Quantum Dots Synthesis And Properties
- Advanced Photocatalysis Techniques
- Diamond and Carbon-based Materials Research
- Silicon Nanostructures and Photoluminescence
- Molecular Junctions and Nanostructures
- Glass properties and applications
- MXene and MAX Phase Materials
- Catalysis and Oxidation Reactions
Helmholtz Centre for Infection Research
2022-2025
Ernst Ruska Centre
2025
Forschungszentrum Jülich
2025
Saarland University
2022-2024
Helmholtz Institute for Pharmaceutical Research Saarland
2022-2024
Universität Ulm
2007-2024
Johannes Gutenberg University Mainz
2009-2018
Goethe University Frankfurt
2017
University of Applied Sciences Mainz
2016
National Institute of Advanced Industrial Science and Technology
2016
CeO2-x nanorods are functional mimics of natural haloperoxidases. They catalyze the oxidative bromination phenol red to bromophenol blue and signaling molecules involved in bacterial quorum sensing. Laboratory field tests with paint formulations containing 2 wt% show a reduction biofouling comparable Cu2 O, most typical biocidal pigment.
Utilizing dynamic self-assembly and self-sorting to obtain large-area, molecularly precise monolayered structures represents a promising approach toward two-dimensional supramolecular organic frameworks (2D SOF) or 2D polymers. So far, related approaches suffer from small domain sizes, fragility weak long-range internal order. Here we report on the of host–guest enhanced donor–acceptor interaction, consisting tris(methoxynaphthyl)-substituted truxene spacer, naphthalene diimide substituted...
Abstract Automated electron Diffraction Tomography (ADT) comprises an upcoming method for “ab intio” structure analysis of nano crystals. ADT allows fine sampling the reciprocal space by sequential collection diffraction patterns while tilting a crystal in fixed tilt steps around arbitrary axis. Electron is collected mode (NED) with semi‐parallel beam diameter down to 50 nm. For tracking micro‐probe STEM imaging used. Full automation acquisition procedure allowed optimisation dose...
Synthesis and studies of graphite oxide started more than 150 years ago turned into a boom by the measurements outstanding physical properties graphene. A series preparation protocols emanated trying to optimize synthesis graphene in order obtain less defective material, as source for However, over-oxidation carbon framework hampered establishing structure-property relationships. Here, fact that two different synthetic methods lead very similar types with preserved lattice is demonstrated....
Engineering materials with specific physical properties have recently focused on the effect of nanoscopic inhomogeneities at 10 nm scale. Such features are expected to scatter medium- and long-wavelength phonons thereby lowering thermal conductivity system. Low is a prerequisite for effective thermoelectric materials, challenge limit transport heat by phonons, without simultaneously decreasing charge transport. A solution-phase technique was devised synthesis "Zn(4)Sb(3)" nanocrystals as...
Abstract In the last decade importance of transmission electron microscopic studies has become increasingly important with respect to characterization organic materials, ranging from small molecules polymers and biological macromolecules. This review will focus on use microscope perform crystallography experiments, detailing approaches in acquiring crystallographic data. The traditional selected area approach recently developed method automated diffraction tomography (ADT) be discussed...
Two-dimensional (2D) polymers hold great promise in the rational materials design tailored for next-generation applications. However, little is known about grain boundaries 2D polymers, not to mention their formation mechanisms and potential influences on material's functionalities. Using aberration-corrected high-resolution transmission electron microscopy, we present a direct observation of layer-stacked polyimine with resolution 2.3 Å, shedding light mechanisms. We found that growth...
Three in one: TiO2 nanoparticles have been functionalized with reactive polymeric ligands that incorporate chelating dopamine anchor groups, a modifying unit to allow the binding of functional molecules such as fluorescent dyes (see picture), well groups tailor solubility inorganic nanocrystals different solvents. Supporting information for this article is available on WWW under http://www.wiley-vch.de/contents/jc_2002/2006/z502517_s.pdf or from author. Please note: The publisher not...
Compared to conventional deposition techniques for the epitaxial growth of metal oxide structures on a bulk substrate, wet-chemical synthesis based dispersible template offers advantages such as low cost, high throughput, and capability prepare metal/metal nanostructures with controllable size morphology. However, organized multicomponent architectures is difficult because morphology components are dictated by interplay interfacial strain facet-specific reactivity. Here we show that...
The pair distribution function (PDF) is a versatile tool to describe the structure of disordered and amorphous materials. Electron PDF (ePDF) uses advantage strong scattering electrons, thus allowing small volumes be probed providing unique information on variations at nano-scale. spectrum ePDF applications rather broad: from ceramic metallic glasses mineralogical organic samples. quantitative interpretation relies knowledge how structural instrumental effects contribute experimental data....
Variation of the crystallite size in flexible porous coordination polymers can significantly influence or even drastically change flexibility characteristics. The impact crystal morphology, however, on dynamic properties metal-organic frameworks (MOFs) is poorly investigated so far. In present work, we systematically modulated particle a model gate pressure MOF (DUT-8(Ni), Ni
Abstract Layered bismuth oxyhalides with bilayered (Bi 2 O ) fluorite (FL) slabs are promising visible‐light photocatalysts because of their excellent stability and the ability to adjust band levels depending on layers combined. It is interesting manipulate Bi slab itself, but only trilayered FL blocks (e.g., 3 4 reported so far. Here, a structurally uncharacterized 12 17 Cl , which extensively studied as photocatalyst for variety reactions, has sextuple 6 8.5 block separated by shown....
Abstract Gated adsorption is one of the unique physical properties flexible metal–organic frameworks with high application potential in selective and sensing molecules. Despite recent studies that have provided some guidelines understanding designing structural flexibility for controlling gate opening by chemical modification secondary building units, currently, there no established strategy to design a MOF showing gated specific guest molecule. In present contribution it demonstrated first...
Due to the short de Broglie wavelength of electrons compared with X-rays, curvature their Ewald sphere is low, and individual electron diffraction patterns are nearly flat in reciprocal space. As a result, reliable unit-cell determination from set randomly oriented patterns, an essential step serial diffraction, becomes non-trivial task. Here we describe algorithm for independent as implemented program PIEP (Program Interpreting Electron Patterns), written early 1990s. We evaluate...
Hypoxylon lienhwacheense, a fungal species with an unclear taxonomic placement within the Hypoxylaceae, presented highly rare stromatal secondary metabolite profile. Isolation of its major constituents led to discovery novel tropolone-maleidride hybrid molecule, lienhwalide A 5, in addition known cordyanhydride B 6, new derivative 7, and binaphthalenetetraol 8. Unexpectedly, H. lienhwacheense produced liquid cultures various congeners 9-11. Their structures relative configurations were...
Metal core/carbon sheath nanocables were fabricated by the solid-state pyrolysis of iron phthalocyanine. The (see TEM image) are long and consist a single-crystal carbide core graphitic carbon sheath. By choosing different metal phthalocyanines procedures, bulk nanotubes varying morphologies obtained in controlled fashion from this simple economic method. In addition, unusually shaped produced. Supporting information for article is available on WWW under...
Novel naphthalocyanine (Nc) nanotubes with special wall structures were fabricated by a template method using Nc molecules as building blocks. Thermal stabilization of the ordered columnar tetrakis(tert-butyl)naphthalocyanine (Ni−BNc) molecules, induced from π−π interactions in nanoscale channels an alumina template, resulted walls consisting well-ordered molecular disks. Further thermal treatment Ni−BNc at 600 °C produced carbonized containing columnar, graphitic graphene disks arranged...
An automated synthesis protocol has been developed for the preparation of oligo(p-benzamide)s on solid support using a commercial peptide synthesizer employing variation standard Fmoc chemistry. Bis(trichloromethyl carbonate) in NMP was used to activate aromatic carboxylic acids acylation secondary amines support. N-Protected hepta(p-benzamide) automatically prepared and manually converted supported block co-oligomer by attaching poly(ethylene glycol) chain. Cleavage from could be achieved...