Article
Materials Science, Multidisciplinary
In-Young Jeong, Minhyuk Choi, Jeongtae Kim, Young Heon Kim, Jae Cheol Shin, Eun Kyu Kim, Chang-Soo Kim, Seungwoo Song
Summary: Despite the flexibility of ternary semiconducting nanowires in bandgap tuning, phase mixing during growth is inevitable. Utilizing a modified reciprocal space mapping method, we were able to successfully separate diffraction overlapping and analyze the lattice constants, composition, and strain effects in one-dimensionally grown nanowire arrays. Adjusting the composition and diameter can tune the phase fraction of different phases in the nanowire arrays.
ELECTRONIC MATERIALS LETTERS
(2022)
Article
Engineering, Manufacturing
Steve Gaudez, Kouider Abdellah Abdesselam, Hakim Gharbi, Zoltan Hegedus, Ulrich Lienert, Wolfgang Pantleon, Manas Vijay Upadhyay
Summary: Dislocation structures, formed during rapid solidification in 3D printed alloys, undergo significant evolution during subsequent solid-state thermal cycling, particularly during the addition of the first few layers above the layer of interest. This finding is crucial for designing alloy microstructures with desired mechanical responses.
ADDITIVE MANUFACTURING
(2023)
Article
Chemistry, Physical
A. Mukherjee, A. Momeni, A. R. Allouche, E. M. Staicu Casagrande, T. Minea, H. Khemliche
Summary: Grazing Incidence Fast Atom Diffraction (GIFAD) is a recent technique used for characterizing surface structures and real-time monitoring of thin film growth. It has typically been used in Ultra-High-Vacuum conditions, but our study shows that it can operate at pressures as high as 10-2 mbar, allowing for new research opportunities in various deposition methods.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Christopher R. Greve, Meike Kuhn, Fabian Eller, Michael A. Buchhorn, Alexander Hexemer, Guillaume Freychet, Lutz Wiegart, Eva M. Herzig
Summary: X-ray photon correlation spectroscopy (XPCS) is a versatile tool for measuring dynamics in bulk samples on the nanometer to micrometer scale. This paper investigates the impact of reflection and refraction effects on the correlation analysis in grazing incidence (GI) scattering experiments. By measuring both grazing incidence transmission XPCS (GT-XPCS) and grazing incidence XPCS (GI-XPCS), the main contributions of the detected signal and the limitations for data interpretation are identified.
Article
Chemistry, Physical
Shuvam Sarkar, Sajal Barman, Mohammad Balal, Sudipta Roy Barman
Summary: A clean and ordered Ru(0001) surface was obtained at 973K by nearly-grazing-incidence-high-temperature sputtering, with sharp LEED spots, dispersing bands in angle-resolved photoemission spectroscopy, and I-V curves similar to existing data. This method is advantageous due to lower temperature requirements and no need for oxygen exposure. Experimental and Monte Carlo calculations both demonstrate the effectiveness of a nearly-grazing incidence angle of sputtering (70 degrees).
APPLIED SURFACE SCIENCE
(2021)
Review
Crystallography
Josef Simbrunner, Ingo Salzmann, Roland Resel
Summary: Grazing Incidence X-ray Diffraction (GIXD) is a powerful tool for characterizing thin film structures. However, indexing the observed diffraction peaks without prior knowledge of the crystal lattices has been challenging. Different indexing methods have been developed for static GIXD measurements and rotated GIXD measurements, allowing indexing of thin film crystals with low symmetry and multiple alignments.
CRYSTALLOGRAPHY REVIEWS
(2023)
Article
Engineering, Electrical & Electronic
Ya Eliovich, V Akkuratov, A. Targonskii, A. Blagov, Yu Pisarevsky, I Petrov, M. Kovalchuk
Summary: A new approach for fast recording Reciprocal Space Maps (RSM) of crystals is proposed in this study, which eliminates the use of mechanical systems. This approach utilizes two Adaptive Bending X-ray Optics (ABXO) elements made of lithium niobate crystals, placed at the positions of the monochromator and analyzer on a laboratory X-ray diffractometer. The experimental results demonstrate that the proposed technique enables fast and precise measurements of RSM, achieving significant improvements in both speed (up to 30 times) and accuracy (up to 3 times) of the obtained data. It opens up opportunities for studying the evolution of the defective structure of various prospective crystalline materials under external loading.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Ya. Eliovich, V. Akkuratov, A. Targonskii, A. Blagov, Yu. Pisarevsky, I. Petrov, M. Kovalchuk
Summary: A new approach for fast recording Reciprocal Space Maps (RSM) of crystals without using mechanical systems has been proposed, showing significant progress in terms of speed and accuracy of data obtained. This technique opens up opportunities for studying the evolution of the defective structure of various prospective crystalline materials under external loading.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Physics, Applied
Ravi Raj Purohit Purushottam Raj Purohit, Daniel Pepin Fowan, Elsa Thune, Stephan Arnaud, Gilbert Chahine, Nils Blanc, Olivier Castelnau, Rene Guinebretiere
Summary: This paper focuses on the continuous measurement of the crystallographic evolution in polycrystalline materials using high-resolution x-ray diffraction. Through observing the structure changes at high temperatures, the characteristics of reciprocal space node splitting and scattering signal evolution during phase transitions are explored.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Mojmir Meduna, Fabio Isa, Franco Bressan, Hans von Kaenel
Summary: This work presents a new method suitable for mapping reciprocal space in three dimensions using standard laboratory equipment. The method utilizes high-resolution X-ray diffraction and 2D X-ray pixel detectors, and the experimental data is processed using Radon transform. It is demonstrated that this technique can be applied for diffraction mapping in reciprocal space even without a highly collimated beam.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Engineering, Electrical & Electronic
Kazutoshi Yoshioka, Ichiro Hirosawa, Takeshi Watanabe, Ryo Yokogawa, Atsushi Ogura
Summary: Carbon-doped silicon (Si:C) nanowires with C concentrations of 0.60% and 0.83% were studied using x-ray reciprocal lattice space mapping (RSM) measurements. The lattice strain relaxation was found to progress from the nanowire/substrate interfaces to the nanowire top surfaces, and the strain relaxation increased with decreasing nanowire width. The largest strain relaxation was observed at a nanowire width of 200 nm, occurring approximately 100 nm from the edge of the nanowires. Additionally, Si:C nanowires fabricated along the [100] direction showed less lattice strain relaxation compared to those along the [110] direction.
JOURNAL OF ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Aleksandra Chumakova, Tristan Steegemans, Igor A. Baburin, Alexander Mistonov, Ilya S. Dubitskiy, Julian Schlotheuber, Felizitas Kirner, Sebastian Sturm, Axel Lubk, Knut Muller-Caspary, Ilona Wimmer, Mikhail Fonin, Elena Sturm, Alexei Bosak
Summary: This study investigates the X-ray diffraction and electron microscopy analysis of magnetite mesocrystals with different particle sizes and shapes, providing insights into the growth models and structural motif choices, as well as their impact on magnetic properties.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Adrien Perrichon, Anton Devishvili, Kristina Komander, Gunnar K. Palsson, Alexei Vorobiev, Rasmus Laven, Maths Karlsson, Max Wolff
Summary: Signal enhancement in a quantum resonator is used to characterize a thin layer of vanadium hydride using neutron reflectometry. Pressure-concentration isotherms and expansion coefficients can be extracted from totally externally reflected neutrons, and off-specular and small angle scattering can be detected and quantified through consistent data analysis of the attenuation cross section. The experiments are effective direct beam measurements, combined with resonant signal enhancement, resulting in reduced counting times and overcoming challenges related to the low brilliance of neutron beams for grazing incidence scattering experiments. Resonant enhancement shows potential to increase any scattering, particularly for grazing incidence small angle neutron scattering and spectroscopy.
Article
Medicine, Legal
P. Saez-Martinez, J. Garate-Lagos, S. Camargo, F. Torres-Roquer, I Queralt, U. Salazar-Kuri
Summary: Capillary diffraction or microdiffraction are standard techniques for characterizing small samples, while grazing incidence X-ray micro-diffraction showed optimal results with a fixed incident beam of 3-5 degrees, allowing for analysis of samples with extremely low quantities without the need for transporting to external facilities.
FORENSIC SCIENCE INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Lert Chayanun, Johan Gustafson, Jesper Wallentin
Summary: Crystallography is a crucial tool in materials science, solid state physics, and protein science. This study demonstrates a simple yet insightful experiment using a laser pointer and Au microdisc arrays to explore and illustrate Bragg diffraction and reciprocal space. The Au microdisc arrays were fabricated using standard semiconductor fabrication techniques. The flexibility of the array design allows for the demonstration of basic concepts such as lattice and atomic form factor, as well as more advanced concepts like quasicrystal and shape function.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Optics
Zhitian Shi, Daniel Josell, Konstantins Jefimovs, Lucia Romano, Thomas P. Moffat, Marco Stampanoni, Christian M. Schleputz
Summary: This study proposes a device with a fractal pattern for precise automatic focusing in high-resolution X-ray tomography. The device generates X-ray transmission images with globally homogeneous macroscopic visibility and high local contrast, and can be used for different pixel sizes and X-ray energies.
Article
Chemistry, Physical
Robert Fischer, Christian M. Schlepuetz, Jianlin Zhao, Pierre Boillat, Dirk Hegemann, Rene M. Rossi, Dominique Derome, Jan Carmeliet
Summary: The wicking dynamics in yarns are not solely determined by inter-fiber pore filling, but are mainly influenced by the transition processes between pores and the structure of the pore network. The yarn pore system consists of a sparse network of long and narrow pores, which leads to step-wise wicking dynamics with fast pore filling events and long waiting times between filling events.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Radiology, Nuclear Medicine & Medical Imaging
Alexandra Migga, Georg Schulz, Griffin Rodgers, Melissa Osterwalder, Christine Tanner, Holger Blank, Iwan Jerjen, Phil Salmon, William Twengstrom, Mario Scheel, Timm Weitkamp, Christian M. Schleputz, Jan S. Bolten, Jorg Huwyler, Gerhard Hotz, Srinivas Madduri, Bert Muller
Summary: By comparing the performance of three cutting-edge laboratory tomography systems, it was found that next-generation laboratory-based microtomography almost reached the quality achieved by synchrotron facilities, allowing successful visualization of medically relevant microanatomical features.
JOURNAL OF MEDICAL IMAGING
(2022)
Article
Chemistry, Multidisciplinary
Mikkel Krell-Jorgensen, Habiburrahman Zulfikri, Magnus Grage Bonnevie, Frederik Simonsen Bro, Asmus Ougaard Dohn, Luca Laraia
Summary: We report bistable indole-containing hemithioindigos (HTIs) with one-way quantitative photoswitching properties. A mechanism involving isomer-specific excited state intramolecular proton transfer (ESIPT) is proposed based on calculations. We also developed a thermally bistable oligomer-inspired bipyrrole-containing HTI that exhibits large band separation and bidirectional near-quantitative photoisomerization in the near-infrared, bio-optical window.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Tetsuo Katayama, Tae-Kyu Choi, Dmitry Khakhulin, Asmus Dohn, Christopher Milne, Gyoergy Vanko, Zoltan Nemeth, Frederico Lima, Jakub Szlachetko, Tokushi Sato, Shunsuke Nozawa, Shin-ichi Adachi, Makina Yabashi, Thomas Penfold, Wojciech Gawelda, Gianluca Levi
Summary: By simultaneously measuring femtosecond X-ray emission and scattering, the intramolecular and solvation structural dynamics following photoexcitation of a solvated copper photosensitizer were tracked. The results reveal that photoinduced solute and solvent motions can be intimately intertwined, explaining the influence of the solvent on the initial steps of light harvesting. This work is a step forward in understanding the microscopic mechanisms of the bidirectional influence between transient solvent reorganization and photoinduced solute structural dynamics.
Article
Physics, Fluids & Plasmas
Claudiu A. Stan, Armin Kalita, Sebastian Marte, Thomas F. Kaldawi, Philip R. Willmott, Sebastien Boutet
Summary: Isolated supercooled water drops were observed to move spontaneously while freezing in vacuum due to the increase of evaporation rate during the early stages of freezing. The self-propulsion velocity was analyzed analytically and modeled numerically, with the model predicting peak velocities on the order of 1 m/s in vacuum and a drop kinematics similar to experimental observations. In air, the self-propulsion velocity is expected to be much smaller but may still be detectable for micron-sized drops.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Chemistry, Multidisciplinary
Isaac Appelquist Loge, Benaiah U. Anabaraonye, Nicolas Bovet, Philip Loldrup Fosbol
Summary: Crystallization fouling poses challenges in heat exchangers, subsurface energy production, and membrane technology; the dominance of growth or nucleation in the precipitation process remains unclear due to lack of experimental evidence; the deposition behavior of BaSO4 changes from growth-dominated to nucleation-dominated regimes with increasing supersaturation, affecting surface resilience and detachment. Sticking factors for BaSO4, CaCO3, and CaSO4 are 1.15%, 0.80%, and 0.11%, respectively, based on published data.
CRYSTAL GROWTH & DESIGN
(2023)
Correction
Chemistry, Physical
Peter Vester, Katharina Kubicek, Roberto Alonso-Mori, Tadesse Assefa, Elisa Biasin, Morten Christensen, Asmus O. Dohn, Tim B. van Driel, Andreas Galler, Wojciech Gawelda, Tobias C. B. Harlang, Niels E. Henriksen, Kasper S. Kjaer, Thomas S. Kuhlman, Zoltan Nemeth, Zhangatay Nurekeyev, Matyas Papai, Jochen Rittman, Gyoergy Vanko, Hasan Yavas, Diana B. Zederkof, Uwe Bergmann, Martin M. Nielsen, Klaus B. Moller, Kristoffer Haldrup, Christian Bressler
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Amke Nimmrich, Matthijs R. Panman, Oskar Berntsson, Elisa Biasin, Stephan Niebling, Jonas Petersson, Maria Hoernke, Alexander Bjorling, Emil Gustavsson, Tim B. van Driel, Asmus O. Dohn, Mads Laursen, Diana B. Zederkof, Kensuke Tono, Tetsuo Katayama, Shigeki Owada, Martin M. Nielsen, Jan Davidsson, Jens Uhlig, Jochen S. Hub, Kristoffer Haldrup, Sebastian Westenhoff
Summary: In this study, the photodissociation of triiodide in four solvents was investigated using femtosecond time-resolved X-ray solution scattering. The results show the solvent-dependent structural evolution during bond cleavage, rearrangements, solvent-cage escape, and bond reformation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Xiaoyi Jiang, Elhamalsadat Shekarforoush, Musemma Kedir Muhammed, Nico Bovet, Marcel Ceccato, Kathryn A. Whitehead, Nils Arneborg, Jens Risbo
Summary: The surface of Lactobacillus crispatus DSM 20584 and Lactobacillus rhamnosus GG were chemically modified using hexanoic anhydride and octanal, resulting in decreased hydrophilicity and altered aggregation and adhesion behaviors. Principal Component Analysis revealed reduced differences in surface properties after modification. This chemical modification method can be applied to adjust the surface properties of lactic acid bacteria and potentially other microorganisms, influencing bacterial adhesion and biofilm formation.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Anton Kovyakh, Soham Banerjee, Chia-Hao Liu, Christopher J. Wright, Yuguang C. Li, Thomas E. Mallouk, Robert Feidenhans'l, Simon J. L. Billinge
Summary: This article demonstrates the spatial mapping of thin film objects at the local and nanoscale level using spatially resolved pair distribution function (PDF) analysis of synchrotron X-ray diffraction data. The method is applied to a lab-on-chip combinatorial array of sample spots containing interesting nanoparticles deposited from liquid precursors using an ink-jet liquid-handling system. The article presents a software implementation of the entire protocol, including an automated data acquisition and analysis approach using the atomic PDF method.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2023)
Article
Cell Biology
Sanja Blaskovic, Pinelopi Anagnostopoulou, Elena Borisova, Dominik Schittny, Yves Donati, David Haberthur, Zhe Zhou-Suckow, Marcus A. Mall, Christian M. Schleputz, Marco Stampanoni, Constance Barazzone-Argiroffo, Johannes C. Schittny
Summary: This study developed a new pipeline for analyzing all airspaces of the entire lung. The results demonstrated irregular widening of parenchymal airspaces in mice with cystic fibrosis-like lung disease and elastase-induced emphysema. The pipeline showed applicability to different imaging modalities and is suitable for studying structural alterations in chronic obstructive lung diseases.
Article
Materials Science, Multidisciplinary
Malgorzata G. Makowska, Fabrizio Verga, Stefan Pfeiffer, Federica Marone, Cynthia S. T. Chang, Kevin Florio, Christian M. Schleputz, Konrad Wegener, Thomas Graule, Steven Van Petegem
Summary: Laser-based Powder Bed Fusion (LPBF) of oxide ceramics allows for fabrication of complex three-dimensional objects, but the mechanical properties of dense LPBF-manufactured ceramics are poor due to structural defects. In this study, operando tomographic microscopy is used to investigate the effects of laser energy density on surface roughness, powder denudation zone, and porosity formation mechanisms. The findings show that increasing laser power results in wider melt pools without affecting their depth, and that increasing power can both eliminate fusion porosity and enhance the formation of spherical porosity.
COMMUNICATIONS MATERIALS
(2023)
Article
Chemistry, Physical
Ruslan P. Kurta, Tim B. van Driel, Asmus O. Dohn, Tim B. Berberich, Silke Nelson, Ivan A. Zaluzhnyy, Nastasia Mukharamova, Dmitry Lapkin, Diana B. Zederkof, Matthew Seaberg, Kasper S. Pedersen, Kasper S. Kjaer, Geoffery Ian Rippy, Elisa Biasin, Klaus B. Moller, Luca Gelisio, Kristoffer Haldrup, Ivan A. Vartanyants, Martin M. Nielsen
Summary: We track the optically excited structural dynamics of [Ir-2(dimen)(4)](2+) molecules in solution using ultrashort X-ray laser pulses. The angular correlations in the scattered X-rays provide a complex fingerprint of the ultrafast dynamics, and the model-assisted analysis of the correlation data reveals various aspects of the photoinduced changes in the excited molecular ensembles. Our findings identify the orientation of the photoinduced transition dipole moments and the role of the ground state conformer in the formation of the excited state.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Habiburrahman Zulfikri, Matyas Papai, Asmus Ougaard Dohn
Summary: When characterizing transition metal complexes and their functionalities, the importance of including the solvent as an active participant is becoming more apparent. The study reveals that long-range dispersion effects modulate the coordination in solvation and can be accurately captured by density functional theory models including dispersion corrections.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)