A5060960004- Copper-based nanomaterials and applications
- Advanced X-ray Imaging Techniques
- Advanced Electron Microscopy Techniques and Applications
- X-ray Diffraction in Crystallography
- ZnO doping and properties
- Quantum Dots Synthesis And Properties
- Electronic and Structural Properties of Oxides
- Nuclear Physics and Applications
- Machine Learning in Materials Science
- Catalysis and Oxidation Reactions
- Hydrocarbon exploration and reservoir analysis
- nanoparticles nucleation surface interactions
- Nanomaterials and Printing Technologies
- Nanocluster Synthesis and Applications
- Material Dynamics and Properties
- Conducting polymers and applications
- Iron oxide chemistry and applications
- Advanced Sensor and Energy Harvesting Materials
- Advanced X-ray and CT Imaging
- Proteins in Food Systems
- X-ray Spectroscopy and Fluorescence Analysis
- Crystallography and Radiation Phenomena
- Gold and Silver Nanoparticles Synthesis and Applications
Universität Hamburg
2019-2024
Hamburg Institut (Germany)
2021-2022
Deutsches Elektronen-Synchrotron DESY
2021
Center for Free-Electron Laser Science
2019
Understanding morphological changes of nanoparticles in solution is essential to tailor the functionality devices used energy generation and storage. However, we lack experimental methods that can visualize these processes solution, or electrolyte, provide three-dimensional information. Here, show how X-ray ptychography enables situ nano-imaging formation hollowing at 155 °C. We simultaneously image growth about 100 nanocubes with a spatial resolution 66 nm. The quantitative phase images...
We investigated the fabrication and functional behaviour of conductive silver-nanowire-polymer composites for prospective use in printing applications. Silver-nanowires with an aspect ratio up to 1000 were synthesized using polyol route embedded a UV-curable printable polymer matrix. Sheet resistances down 13 Ω/sq at optical transmission about 90% accomplished. The silver-nanowire composite morphology network structure was by electron microscopy, atomic force profilometry, ellipsometry as...
Abstract Nanocrystal self‐assembly into supercrystals provides a versatile platform for creating novel materials and devices with tailored properties. While common strategies imply the use of purified nanoparticles after synthesis, conversion chemical precursors directly nanocrystals then in simple procedures has been rarely reported. Here, nucleation growth CuPd icosahedra their consecutive assembly large closed‐packed face‐centered cubic (fcc) are studied. To this end, study simultaneously...
Abstract The key to fabricating complex, hierarchical materials is the control of chemical reactions at various length scales. To this end, classical model nucleation and growth fails provide sufficient information. Here, we illustrate how modern X-ray spectroscopic scattering in situ studies bridge molecular- macro- scales for assemblies polyhedrally shaped CoO nanocrystals. Utilizing high energy-resolution fluorescence-detected absorption spectroscopy, directly access molecular level...
Being able to observe the formation of multi-material nanostructures in situ, simultaneously from a morphological and crystallographic perspective, is challenging task. Yet, this essential for fabrication nanomaterials with well-controlled composition exposing most active surfaces, as required highly catalysts energy applications. To demonstrate how X-ray ptychography can be combined scanning nanoprobe diffraction realize multimodal imaging, we study growing Cu2O nanocubes their...
Abstract Ptychographic X-ray microscopy is an ideal tool to observe chemical processes under in situ conditions. Chemical reactors, however, are often thicker than the depth of field, limiting lateral spatial resolution projection images. To overcome this limit and reach higher resolution, wave propagation within sample environment has be taken into account. Here, we demonstrate effect recording a ptychographic copper(I) oxide nanocubes grown on two sides polyimide foil. Reconstructing using...
The X-ray scanning microscope PtyNAMi at beamline P06 of PETRA III DESY in Hamburg, Germany, is designed for high-spatial-resolution 3D imaging with high sensitivity. Besides optimizing the coherent ux density on sample and precision mechanics scanner, special care has been taken to reduce background signals detector. optical path behind evacuated up until sensor a four-megapixel detector that placed into vacuum. In this way, parasitic scattering from air windows close avoided. instrument...
Nanocrystal self-assembly into supercrystals provides a versatile platform for creating novel materials and devices with tailored properties. While common strategies imply the use of purified nanoparticles after synthesis, conversion chemical precursors directly nanocrystals then in simple procedures has been rarely reported. Here we study nucleation growth CuPd icosahedra their consecutive assembly extended closed-packed face-centered cubic (fcc) supercrystals. To this end, simultaneously...