A5034535915- Advanced X-ray Imaging Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Metal and Thin Film Mechanics
- Advanced X-ray and CT Imaging
- Laser-Plasma Interactions and Diagnostics
- Medical Imaging Techniques and Applications
- Advanced Electron Microscopy Techniques and Applications
- Epoxy Resin Curing Processes
- Advancements in Photolithography Techniques
- Thermal properties of materials
- Ion-surface interactions and analysis
- Titanium Alloys Microstructure and Properties
- Enzyme Structure and Function
- Diamond and Carbon-based Materials Research
- Pulsed Power Technology Applications
- Adaptive optics and wavefront sensing
- Optical Systems and Laser Technology
- Flame retardant materials and properties
- Geophysical Methods and Applications
- Boron and Carbon Nanomaterials Research
- Nanofabrication and Lithography Techniques
- Advanced Polymer Synthesis and Characterization
- Shape Memory Alloy Transformations
- Thermography and Photoacoustic Techniques
- Polymer composites and self-healing
Deutsches Elektronen-Synchrotron DESY
2022-2025
Universität Hamburg
2022-2025
Center for Free-Electron Laser Science
2022-2025
Hamburg University of Technology
2024
Hamburg Centre for Ultrafast Imaging
2023-2024
Karlsruhe Institute of Technology
2018-2024
National Research Tomsk State University
2015-2016
Tomsk Polytechnic University
2015-2016
Lomonosov Moscow State University
1993
Sub-ångström spatial resolution of electron density coupled with sub-femtosecond to few-femtosecond temporal is required directly observe the dynamics electronic structure a molecule after photoinitiation or some other ultrafast perturbation, such as by soft X-rays. Meeting this challenge, pushing field quantum crystallography attosecond timescales, would bring insights into how and nuclear degrees freedom couple, enable study coherences involved in molecular dynamics, ultimately these be...
Multilayer Laue lenses are volume diffractive optical elements for hard X-rays with the potential to focus beams sizes as small 1 nm. This ability is limited by precision of manufacturing process, whereby systematic errors that arise during fabrication contribute wavefront aberrations even after calibration deposition process based on metrology. Such can be compensated using a phase plate. However, current high numerical aperture nanometer resolution exhibit exceed those corrected single To...
High-resolution X-ray imaging of noncrystalline objects is often achieved through the approach scanning coherent diffractive known as ptychography. The resolution usually limited by scattering properties sample, where weak diffraction signals at highest angles compete with parasitic scattering. Here, we demonstrate that multilayer Laue lenses a high numerical aperture (NA) can be used to create strong reference beam holographically boosts from sample over large range angles, enabling...
Different approaches of 2D lens arrays as Shack–Hartmann sensors for hard X-rays are compared. For the first time, a combination (SHSX) with super-resolution imaging approach to perform multi-contrast is demonstrated. A diamond employed well known test object. The interleaving has great potential overcome array limitation given by two-photon polymerization lithography. Finally, radiation damage induced continuous exposure an SHSX prototype white beam was studied showing good performance...
Single-shot grating-based phase-contrast imaging techniques offer additional contrast modalities based on the refraction and scattering of X-rays in a robust versatile configuration. The utilization single optical element is possible such methods, allowing shortening acquisition time increasing flux efficiency. One ways to upgrade single-shot utilize customized components, as two-dimensional (2D) X-ray gratings. In this contribution, we present achievements development 2D gratings with UV...
One of the types negative tone photoresists is composed at least a catalyst, solvent, and epoxy resin. This primary raw material for lithography technology. To ensure high-quality pattern transfer in process, it crucial to control properties photoresist. In this work, set resins based on Bisphenol-A were synthesized. The obtained have been characterized regarding chain size its derivative products. As second step, an epoxidation reaction was performed groups quantified. profile resins, by...
In this Letter, we present the application of inverted Hartmann mask for time-resolved single-shot phase-contrast x-ray imaging. The is a periodic array free-standing gold pillars. manufactured by UV lithography and electroplating. Time-resolved measurements are performed imaging pulsed laser ablation in liquids using white-beam synchrotron radiation. combination with technique provides sufficient differential phase contrast even at very short exposure times. It can be effectively used fast...
High time resolution in scattering analysis of thin films allows for determination thermal conductivity by transient pump-probe detection dissipation laser-induced heating, TDXTS. We describe an approach that analyses the picosecond-resolved lattice parameter reaction a gold transducer layer on pulsed laser heating to determine layered structures below transducer. A detailed modeling cooling kinetics Laplace-domain discerning effects and interface resistance as well basic depth information....
The quality of high aspect ratio microstructures fabricated by deep X-ray lithography is highly dependent on the photoresist material used and process parameters applied. Even with photoresists more suitable to this process, it common face defects in final optical components, such as case gratings. gratings need be critical dimensions a sub-micrometer micrometer scale, periods few micrometers heights hundreds imaging techniques Talbot–Lau Interferometry. During fabrication these features...
The evolution of the structural phase states in Tantalum coatings formed on NiTi substrate and their change before after low energy high current pulsed electron beam treatment has been investigated by using X-ray diffraction technique. It was found that coating reflections cubic α-Ta β-Ta tetragonal phases, with a predominance (∼ 65 vol.%) were observed. layer between composed bcc structure based Ta-O an oxygen concentration CO ≈ 13 atm.%. After LEHCPEB at E = 15 J/cm2 coated samples...
Using XRD method it was revealed that in the stress-strain state of Al nanopowder lattice a non-significant amount energy stored (~0.385 J/g). Nevertheless, according to data obtained by differential thermal analysis (DTA) total 348 J/g. The estimated value might be caused significant contribution nanoparticles surface energy, which cannot detected means method. However, proposed paper can applied estimate changes structural and states for or another micro-and nanopowders.
Abstract This work combines non‐destructive X‐ray micro‐computed tomography (µCT) and scanning electron microscopy (SEM) to study the self‐healing triggering mechanism in a system consisting of an epoxy resin, based on diglycidyl ether bisphenol A, with embedded poly(urea‐formaldehyde) (PUF) microcapsules filled amino‐functional polysiloxane (PDMS‐a) as healing agent. µCT SEM analyses proved that PDMS‐a was effective filling microcrack areas, providing efficient process, confirmed main...
This paper reports on the fabrication and characterization of an inverted Hartmann mask its application for multi-contrast X-ray imaging polymer composite material in a laboratory setup. masks open new possibilities high-speed imaging, obtaining orientation-independent information internal structures without rotating object. The was manufactured with deep lithography gold electroplating low-absorbing polyimide substrate. Such approach allows us to produce gratings small period high aspect...
Three-dimensional insights into the microstructure of composite materials are vital for enhancing their performance under operational conditions. Phase-sensitive methods can offer supplementary data, especially with low absorption, compared to standard absorption-based techniques. This work presents correlative X-ray imaging and computed tomography results polymer composites reinforced glass fibers using an inverted Hartmann mask. method identified areas enhanced refraction scattering due...
<title>Abstract</title> High-resolution X-ray imaging of non-crystalline objects is often achieved through the approach scanning coherent diffractive known as ptychography. The resolution usually limited by scattering properties sample, where weak diffraction signals at highest angles compete with background noise and parasitic scattering. Here we demonstrate that multilayer Laue lenses high numerical aperture (NA) can be used to create a strong reference beam holographically boosts from...
High-intensity X-ray free electron laser (XFEL) beams require optics made of materials with minimal radiation absorption, high diffraction efficiency, and hardness. Multilayer Laue lenses (MLLs) are diffraction-based that can focus XFEL beams, as already demonstrated tungsten carbide/silicon carbide (WC/SiC)-based MLLs. However, atomic number such strongly absorb X-rays, resulting in heat loads. Numerical simulations predict much lower loads MLLs consisting low Z materials, although have...
A noise-robust sub-10 nanometer imaging resolution from a Siemens star sample was achieved, by ptychographically reconstructing projection holograms recorded at an effective magnification of more than 11,800 in the regime hard X-rays.
Sub-angstrom spatial resolution of electron density coupled with sub-femtosecond temporal is required to directly observe the dynamics electronic structure a molecule after photoinitiation or some other ultrafast perturbation. Meeting this challenge, pushing field quantum crystallography attosecond timescales, would bring insights into how and nuclear degrees freedom couple, enable study coherences involved in molecular dynamics, ultimately these be controlled. Here we propose reach realm by...
In this contribution, we compare the performance of Hartmann masks and inverted different periods for phase-sensitive X-ray imaging. The were gold meshes arrays pillars, both manufactured by UV lithography electroforming on low-absorbing graphite substrates. We asses comparing visibility homogeneity periodic patterns. Manufactured customized exhibit clear patterns demonstrate values from 30 % to 50 depending setup configuration. Finally, show phase contrast imaging with an angular resolution...
Photoresists (or photo-resins) are the main and most important raw material used for lithography techniques such as deep X-ray (DXRL), ultraviolet (UVL), deep-UV (DUVL), extreme UV (EUVL). In previous work, we showed how complicated could be synthesis of resins to produce photoresist. this study, follow up on strategy tuning macro levels properties formulate photo-resins. They were developed from a primary basis, using epoxy resins, solvent, photoinitiator in several concentrations. The...
We present the application of single-shot multicontrast X-ray imaging with an inverted Hartmann mask to time-resolved in situ visualization chemical reaction products. The real-time monitoring illustrative indicated formation precipitate by absorption, differential phase, and scattering contrast images obtained from a single projection. Through these channels, along mixing line reagents, border between solid solution, presence structures 100-200 nm sizes were observed. measurements performed...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Marina G. Ostapenko, Ludmila L. Meisner, Aleksandr I. Lotkov, Margarita A. Zakharova, Ekaterina Y. Gudimova; In-situ X-ray diffraction studies of the phase transformations structural states B2, R B19′ phases in Ti49.5Ni50.5 alloy. AIP Conf. Proc. 27 October 2015; 1683 (1): 020170....
Currently microheterogeneous titanium catalyst is widely used to produce stereoregular polyisoprene, which one of the largeproducts of modern manufacture synthetic rubber. In work the regularity formation at temperatures of (–10)÷(–15) °C and polymerization isoprene in medium aliphatic solvent (isopentane) changes suspension motion hydrodynamic regime catalytically active particles are considered. For this purpose, mixing enhanced due to the turbulence flow external recirculation loop during...