A5043165199- Supramolecular Self-Assembly in Materials
- Advanced Photocatalysis Techniques
- Advanced Electron Microscopy Techniques and Applications
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Nanomaterials for catalytic reactions
- Electrocatalysts for Energy Conversion
- Covalent Organic Framework Applications
- Phosphorus and nutrient management
- Advanced Polymer Synthesis and Characterization
- Bacteriophages and microbial interactions
- Gold and Silver Nanoparticles Synthesis and Applications
- Advanced battery technologies research
- Metal-Organic Frameworks: Synthesis and Applications
- Ionic liquids properties and applications
- Lipid Membrane Structure and Behavior
- Chemical Synthesis and Analysis
- Glycosylation and Glycoproteins Research
- Catalytic Processes in Materials Science
- Crystallization and Solubility Studies
- Luminescence and Fluorescent Materials
- Calcium Carbonate Crystallization and Inhibition
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Photosynthetic Processes and Mechanisms
Helmholtz-Zentrum Berlin für Materialien und Energie
2016-2025
University of Potsdam
2022
Max Planck Institute of Biochemistry
2010-2021
Berliner Energieagentur (Germany)
2020
Humboldt-Universität zu Berlin
2016-2017
Max Planck Society
2010-2011
Abstract Covalent organic frameworks (COFs) have emerged as an important class of semiconductors and photocatalysts for the hydrogen evolution reaction (HER)from water. To optimize their photocatalytic activity, typically moieties constituting are considered most suitable combinations them searched for. However, effect covalent linkage between these on performance has rarely been studied. Herein, we demonstrate that donor‐acceptor (D‐A) type imine‐linked COFs can produce with a rate high...
Abstract In recent years, due to its great promise in boosting the energy density of lithium batteries for future storage, research on Li metal anode, as an alternative graphite anode Li‐ion batteries, has gained significant momentum. However, practical use anodes been plagued by unstable (re)deposition and poor cyclability. Although tremendous efforts have devoted stabilization anodes, mechanisms electrochemical (re‐)deposition/dissolution solid‐electrolyte‐interphase (SEI) formation remain...
Synaptic vesicles are embedded in a complex filamentous network at the presynaptic terminal. Before fusion, linked to active zone (AZ) by short filaments (tethers). The identity of molecules that form and regulate tethers remains unknown, but Rab3-interacting molecule (RIM) is prominent candidate, given its central role AZ organization. In this paper, we analyzed architecture RIM1α knockout (KO) mice cryo-electron tomography. stark contrast previous work on dehydrated, chemically fixed...
The ability to synthesize a broad spectrum of metal clusters (MCs) with their size controllable on subnanometer scale presents an enticing prospect for exploring nanosize-dependent properties. Here we report innovative design capping agent from polytriazolium poly(ionic liquid) (PIL) in vesicular form solution that allows crafting variety MCs including transition metals, noble and bimetallic alloy precisely controlled sizes (∼1 nm) record-high catalytic performance. ultrastrong stabilization...
Understanding the nanoscale structure and dynamics of supramolecular hydrogels is essential for exploiting their self-healing mechanisms. We describe here nanostructural evolution mechanism formed from in situ generated hydrophobically modified hydrophilic polymers wormlike sodium dodecyl sulfate (SDS) micelles. observe a conformational transition SDS micelles upon addition hydrophobic as well monomers. Several hundred nanometer long completely disappear after monomer addition, favor...
Protein microtubule is a significant self-assembled architecture found in nature with crucial biological functions. However, mimicking protein microtubules precise structure and controllable self-assembly behavior remains highly challenging. In this work, we demonstrate that by using dual supramolecular interactions from series of well-designed ligands, i.e., protein–sugar interaction π–π stacking, homogeneous microtubes were achieved tetrameric soybean agglutinin without any chemical or...
Limited understanding of the lithium (Li) nucleation and growth mechanism has hampered implementation Li-metal batteries. Herein, we unravel evolution morphology inner structure Li deposits using focused ion beam scanning electron microscopy (FIB/SEM). Ball-shaped are found to be widespread stack up at a low current density. When density exceeds diffusion-limiting current, bush-shaped deposition appears that consists Li-balls, Li-whiskers, bulky Li. Cryogenic transmission (cryo-TEM) further...
Despite their inherent instability, 4n π systems have recently received significant attention due to unique optical and electronic properties. In dibenzopentalene (DBP), benzanellation stabilizes the highly antiaromatic pentalene core, without compromising its amphoteric redox behavior or small HOMO-LUMO energy gap. However, incorporating such molecules in organic devices as discrete amorphous polymers can limit performance (e.g., solubility battery electrolyte solution low internal surface...
Glyconanoparticles made by self-assembled glycopolymers currently are practical and efficient mimics of the glycocalyx on cell surfaces. Considering complexity glycocalyx, glyconanoparticles with different sugars their coronas, i.e., mixed-shell glycomicelles, could be more valuable compared to homoshell micelles. In this paper, we explore architectural effect glyconanoparticle corona macrophage endocytosis lectin-binding ability. A series composed a biodegradable polyester backbone...
Precise control of the interior and outer shapes polymer nanoparticles has found broad interest in nanosciences, for example, fundamental studies their physical properties, colloidal behavior, corresponding applications. Realizing such below 50 nm scale (i.e., a size close to individual chains) requires accurate manipulation polymerization techniques judicious choice chemical structure monomers and/or polymers. Here, we constructed series well-defined sub-50 homopolymer with controllable...
Abstract In nature, proteins self‐assemble into various structures with different dimensions. To construct these nanostructures in laboratories, normally symmetries are selected. However, most of approaches engineering‐intensive and highly dependent on the accuracy protein design. Herein, we report that a simple native LecA assembles one‐dimensional nanoribbons nanowires, two‐dimensional nanosheets, three‐dimensional layered controlled mainly by small‐molecule assembly‐inducing ligands RnG (...
Synaptic transmission is characterized by fast, tightly coupled processes and complex signaling pathways that require a precise protein organization, such as the previously reported nanodomain colocalization of pre- postsynaptic proteins. Here, we used cryo-electron tomography to visualize synaptic complexes together with their native environment comprising interacting proteins lipids on 2- 4-nm scale. Using template-free detection classification, showed tripartite trans-synaptic assemblies...
Poly(ionic liquid)s (PIL) are common precursors for heteroatom-doped carbon materials. Despite a relatively higher carbonization yield, the PIL-to-carbon conversion process faces challenges in preserving morphological and structural motifs on nanoscale. Assisted by thin polydopamine coating route ion exchange, imidazolium-based PIL nanovesicles were successfully applied morphology-maintaining to prepare composite nanocapsules. Extending this strategy further their composites, we demonstrate...
Here, we show that calcium sulfate dihydrate (gypsum) can be directly, rapidly and reversibly converted to hemihydrate (bassanite) in high salinity solutions (brines). The optimum conditions for the efficient production of bassanite a short time (<5 min) involve use brines with c(NaCl) > 4 M maintaining temperature, T 80 °C. When solution containing crystals is cooled down around room eventually gypsum formed. temperature raised again °C, re-precipitated. This contrasts better-known...
Exploration of metal clusters (MCs) adaptive to both aqueous and oil phases without disturbing their size is promising for a broad scope applications. The state-of-the-art approach via ligand-binding may perturb MCs' due varied metal-ligand binding strength when shuttling between solvents different polarity. Herein, we applied physical confinement series small noble MCs (<1 nm) inside ionic organic cages (I-Cages), which by means anion exchange enables reversible transfer hydrophobic...
We report a facile and novel method for the fabrication of Cu2O@PNIPAM core-shell nanoreactors using Cu2O nanocubes as core. The PNIPAM shell not only effectively protects from oxidation, but also improves colloidal stability system. microgels can work efficiently photocatalyst decomposition methyl orange under visible light. A significant enhancement in catalytic activity has been observed compared with pure nanocubes. Most importantly, photocatalytic be further tuned by thermosensitive...
We proposed the deprotection-induced block copolymer self-assembly (DISA); that is, deprotection of hydroxyl groups resulted in situ glycopolymers. In previous studies, copolymers soluble common organic solvents were employed as starting material. this paper, by using protected glyco-block containing preassembled glycovesicles water material, we moved forward and made two exceeding achievements. First, have observed a morphology transition triggered alkali water. The...
Polymorphism has been the subject of investigation across different research disciplines. In biology, polymorphism could be interpreted in such a way that discrete biomacromolecules can adopt diversiform specific conformations/packing arrangement, and this polymorph-dependent property is essential for many biochemical processes. For example, bacterial flagellar filament, composed flagellin, switches between supercoiled state allowing bacteria to swim tumble. However, artificial...
Poly(triazine imide) (PTI) is a highly crystalline semiconductor, and though no techniques exist that enable synthesis of macroscopic monolayers PTI, it possible to study in thin layer device applications are compatible with its polycrystalline, nanoscale morphology. We find the by-product conventional PTI C-C carbon-rich phase detrimental for charge transport photoluminescence. An optimized synthetic protocol yields material an increased quantum yield, enabled photocurrent...
Abstract Numerous nanostructured materials have been reported as efficient sulfur hosts to suppress the problematic “shuttling” of lithium polysulfides (LiPSs) in lithium‐sulfur (Li−S) batteries. However, direct comparison these their efficiency suppressing LiPSs shuttling is challenging, owing structural and morphological differences between individual materials. This study introduces a simple route synthesize series host with same yolk‐shell nanospindle morphology but tunable compositions...
Abstract Semiconducting carbon nitride polymers are used in metal‐free photocatalysts and opto‐electronic devices. Conventionally, they obtained using thermal ionothermal syntheses inscrutable, closed systems therefore, their condensation behavior is poorly understood. Here, the synthetic protocols properties compared for two types of materials – 2D layered poly(triazine imide) (PTI) hydrogen‐bonded melem hydrate from three low‐melting salt eutectics taken systematic series alkali metal...
Herein, we report a straightforward, scalable synthetic route towards poly(ionic liquid) (PIL) homopolymer nanovesicles (NVs) with tunable particle size of 50 to 120 nm and shell thickness 15 60 via one-step free radical polymerization induced self-assembly. By increasing monomer concentration for polymerization, their nanoscopic morphology can evolve from hollow NVs dense spheres, finally directional worms, in which multilamellar packing PIL chains occurred all samples. The transformation...
The synthesis of homochiral two-dimensional Covalent Organic Frameworks (2D COFs) from chiral pi-conjugated building blocks is challenging, as units often lead to misaligned stacking interactions. In this work, we introduce helical chirality into 2D COFs using configurationally stable enantiopure and racemic [5]helicenes linkers in the backbone [5]HeliCOFs. Through condensation with 1,3,5-triformylbenzene (TFB) or 1,3,5-triformylphloroglucinol (TFP), our approach enables efficient formation...
Summary Cryo‐electron tomography allows three‐dimensional visualization of frozen‐hydrated, vitrified biological material at molecular resolution. Here, we summarize the most important sample preparation methods and technical aspects relevant for cryo‐electron tomography, as well its recent applications from isolated macromolecular complexes to entire cells tissues.