Article
Physics, Multidisciplinary
Jiecheng Yang, Peiping Zhu, Dong Liang, Hairong Zheng, Yongshuai Ge
Summary: A general theoretical framework is presented to explain the formation of the phase signal in an x-ray microscope integrated with a grating interferometer. This theory can predict key parameters of phase contrast imaging and has been validated through numerical simulations.
Article
Physics, Multidisciplinary
Zhi-Li Wang, Rui-Cheng Zhou, Li-Ming Zhao, Kun Ren, Wen Xu, Bo Liu, Heng Chen
Summary: This study conducts a coherence analysis to investigate the influence of the source grating on fringe visibility in dual phase grating interferometry. The results can serve as general guidelines for designing and optimizing dual phase grating x-ray interferometers.
Article
Multidisciplinary Sciences
Matteo Busi, Jiazhou Shen, Michael Bacak, Marie Christine Zdora, Jan Capek, Jacopo Valsecchi, Markus Strobl
Summary: This study introduces a novel multi-directional neutron dark-field imaging approach that utilizes a single absorption grating to simultaneously probe multiple scattering directions. The method successfully resolves the microstructural properties of materials and overcomes limitations of conventional neutron dark-field imaging in assessing complex heterogeneous anisotropic microstructures.
SCIENTIFIC REPORTS
(2023)
Review
Chemistry, Multidisciplinary
Akio Yoneyama, Daiko Takamatsu, Thet-Thet Lwin, Shigehito Yamada, Tetsuya Takakuwa, Kazuyuki Hyodo, Keiichi Hirano, Satoshi Takeya
Summary: Crystal-based X-ray interferometry (CXI) detects X-ray phase shifts with the highest sensitivity among the X-ray phase-detecting methods. Phase-contrast X-ray imaging (PCXI) using CXI has the highest density resolution and has been widely applied in various fields. Novel imaging methods have also been developed to take advantage of CXI's high sensitivity, such as visualization of the effective atomic number and the three-dimensional temperature. This article reviews the principles, history, and potential applications of PCXI and CXI systems.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Xin Liu, Lang Liu, Jianheng Huang, Yaohu Lei, Ji Li
Summary: In this paper, a single grating imaging system is proposed for X-ray phase-contrast imaging. The system uses a single-shot algorithm to retrieve attenuation and phase gradient distribution, achieving time-saving and detail preservation. By using a large-size X-ray detector, the system can be configured for both microscopic and large field-of-view imaging.
Article
Physics, Applied
Alessandra Patera, Carolina Arboleda, Veronica Ferrero, Elisa Fiorina, Konstantins Jefimovs, Alessandro Lo Giudice, Felix Mas Milian, Paolo Mereu, Stefania Pallotta, Luciano Ramello, Alessandro Re, Lorenzo Visca, Piergiorgio Cerello
Summary: The 4D GRAPH-X project aims to develop a prototype of an x-ray grating-based phase-contrast imaging scanner in a laboratory setting, optimized for analyzing moving objects and potential biomedical applications. Wave field simulations are used to optimize the setup specifications and construct a high-resolution and high-sensitivity imaging system.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Review
Radiology, Nuclear Medicine & Medical Imaging
Lorenz Birnbacher, Eva-Maria Braig, Daniela Pfeiffer, Franz Pfeiffer, Julia Herzen
Summary: Quantitative nature of biomedical imaging data is becoming increasingly important with the advancements in data science. Grating-based phase contrast computed tomography (GBPC-CT) is a phase contrast micro-CT imaging technique that offers high soft tissue contrast and high spatial resolution, and allows for quantitative determination of electron density and effective atomic number using laboratory X-ray sources. This review article focuses on the application of quantitative GBPC-CT in biomedical field.
EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING
(2021)
Article
Multidisciplinary Sciences
Hongchang Wang, Kawal Sawhney
Summary: Researchers have successfully generated omnidirectional differential phase images using X-ray differential phase contrast imaging, providing more information for studying complex samples and enabling simultaneous extraction of omnidirectional dark-field images to study ordered scattering structures.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Multidisciplinary Sciences
Hongchang Wang, Kawal Sawhney
Summary: This article introduces a method for generating omnidirectional differential phase images by scanning a randomly structured modulator, which provides more information than traditional imaging methods and allows the simultaneous extraction of omnidirectional dark-field images for studying strongly ordered scattering structures.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Applied
Zhijun Chi
Summary: A compact imaging configuration using X-ray polycapillary lens instead of a source grating is proposed and its feasibility is examined through Monte Carlo simulation. With a typical X-ray spectrum for diagnostic mammography, an accurate phase image of the phantom is successfully reconstructed.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Siwei Tao, Zonghan Tian, Ling Bai, Yueshu Xu, Xiang Hao, Cuifang Kuang, Yang Michael Yang, Xu Liu
Summary: X-ray phase contrast imaging is an emerging imaging modality for industrial inspections and biomedical applications. In this study, a polycapillary semilens was used to improve the contrast-to-noise ratio of the reconstructed images and reduce unnecessary radiation in other areas.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2022)
Article
Physics, Multidisciplinary
Siwei Tao, Congxiao He, Xiang Hao, Cuifang Kuang, Xu Liu
Summary: This paper simulates factors affecting spatial resolution in a typical 2D grating-based phase contrast imaging system, based on scalar diffraction theory and operator theory of imaging. It discusses methods to improve image quality and the limitation of the grating-to-detector distance in the spatial harmonic method.
FRONTIERS IN PHYSICS
(2021)
Article
Optics
Zhi Qiao, Xianbo Shi, Yudong Yao, Michael J. Wojcik, Luca Rebuffi, Mathew J. Cherukara, Lahsen Assoufid
Summary: By utilizing deep learning, the speckle-based phase-contrast imaging neural network (SPINNet) significantly enhances imaging quality and retrieval speed compared to existing methods. It enables high-resolution and fast data acquisition and processing for various applications.
Article
Physics, Multidisciplinary
Yao Chun-Xia, He Qi-Li, Zhang Jin, Fu Tian-Yu, Wu Zhao, Wang Shan-Feng, Huang Wan-Xia, Yuan Qing-Xi, Liu Peng, Wang Yan, Zhang Kai
Summary: X-ray differential phase contrast imaging technology has potential applications in fields such as medical science and material science, but traditional systems have limitations. A new algorithm based on single-shot grating differential phase contrast imaging system without analyzer grating has been proposed to improve accuracy and reliability of information extraction, reducing radiation damage to samples and making it highly compatible with future clinical applications of X-ray phase contrast imaging.
ACTA PHYSICA SINICA
(2021)
Article
Physics, Applied
L. Brombal, F. Arfelli, F. Brun, F. Longo, N. Poles, L. Rigon
Summary: Accurate simulation tools are important for the design and optimization of x-ray phase-contrast imaging setups. This study presents a practical implementation of x-ray phase-contrast in Geant4 and validates the simulation results against theoretical predictions.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Neda Iranpour Anaraki, Marianne Liebi, Quy Ong, Clement Blanchet, Anjani K. Maurya, Francesco Stellacci, Stefan Salentinig, Peter Wick, Antonia Neels
Summary: This study investigates the influence of nanoparticles properties on colloidal stability in NaCl and protein solutions, revealing that PEG coating provides high stability for nanoparticles. Different mechanisms are observed for citrate-capped nanoparticles, with proteins attaching to the nanoparticle surfaces. Findings pave the way for designing and synthesizing nanoparticles with controlled behaviors in biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Crystallography
Jan Bajer, Stefan Zaunschirm, Bernhard Plank, Michaela Slapakova, Lucia Bajtosova, Miroslav Cieslar, Johann Kastner
Summary: Inhomogeneous structure with central segregation occurs in commercial twin-roll cast AA 3003 aluminum alloy, where segregations form as manganese, iron, and silicon-rich channels spread in the rolling direction. Diffusion of silicon during annealing leads to the formation and growth of voids due to the Kirkendall effect.
Article
Materials Science, Characterization & Testing
Bernhard Plank, Markus G. R. Sause, Johann Kastner
Summary: The fast and accurate determination of porosity in polymeric materials using X-ray computed tomography (CT) is important. A CT simulation study showed that the ratio of void surface area to void volume can describe and differentiate different porosity samples. It was found that this ratio can be used to estimate the minimal voxel size for proper porosity segmentation.
NONDESTRUCTIVE TESTING AND EVALUATION
(2022)
Article
Multidisciplinary Sciences
Sarah Heub, Fatemeh Navaee, Daniel Migliozzi, Diane Ledroit, Stephanie Boder-Pasche, Jonas Goldowsky, Emilie Vuille-Dit-Bille, Joelle Hofer, Carine Gaiser, Vincent Revol, Laura Suter-Dick, Gilles Weder
Summary: This study proposes a new approach called HistoBrick that facilitates the processing of 3D cell models and minimizes sample material loss. HistoBrick's features are compatible with automation standards, allowing for high-throughput micro-histology.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Multidisciplinary
Huanyu Zhang, Faruk Okur, Claudia Cancellieri, Lars P. H. Jeurgens, Annapaola Parrilli, Dogan Tarik Karabay, Martin Nesvadba, Sunhyun Hwang, Antonia Neels, Maksym V. Kovalenko, Kostiantyn V. Kravchyk
Summary: Li dendrites form in Li7La3Zr2O12 (LLZO) solid electrolytes due to volume changes and voids at the Li metal/LLZO interface. Dense-porous LLZO membranes provide a solution by storing lithium in the pores, avoiding volume changes and void formation. The reported method of sequential tape-casting allows for the production of bilayer membranes with high performance.
Article
Nanoscience & Nanotechnology
Neda Iranpour Anaraki, Marianne Liebi, Kamran Iranshahi, Clement Blanchet, Peter Wick, Antonia Neels
Summary: The combination of microfluidic approach and SAXS measurements allows for the evaluation of nanoparticle systems in nanomedicine. The study shows that 5nm PEGylated gold nanoparticles can self-assemble into 3D ordered domains in different media and maintain this ordering in the presence of human serum albumin molecules.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tiezhu Guo, Di Zhou, Shungui Deng, Mohammad Jafarpour, Jonathan Avaro, Antonia Neels, Jakob Heier, Chuanfang Zhang
Summary: Transparent conductive electrodes (TCEs) are crucial for transparent electronic devices, and MXene-based TCEs have high potential due to their excellent properties. By using large-sized MXene flakes and constructing compact microstructures, high performance TCEs with a DC conductivity of 19,325 S cm(-1) at 83.4% transmittance were achieved. The blade-coated MXene films also showed outstanding performance in transparent Joule heaters and supercapacitors.
Article
Chemistry, Multidisciplinary
Tiezhu Guo, Di Zhou, Min Gao, Shungui Deng, Mohammad Jafarpour, Jonathan Avaro, Antonia Neels, Erwin Hack, Jing Wang, Jakob Heier, Chuanfang (John) Zhang
Summary: Large-area uniform transparent conductive electrodes (TCEs) with excellent optoelectronic performance have been achieved for the first time using solution-processed Ti3C2Tx MXene aqueous inks. The conductive MXene nanosheets are forced to orientate horizontally during the slot-die coating process, resulting in highly aligned MXene TCEs without percolation issues.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Ruikai Wu, Lucas Stieglitz, Sandro Lehner, Milijana Jovic, Daniel Rentsch, Antonia Neels, Sabyasachi Gaan, Bernhard Rieger, Manfred Heuberger
Summary: A series of new tailored a-diimine Ni (II) complexes with bulky ortho-N-aryl groups were successfully synthesized and applied in ethylene polymerization. These complexes exhibited high catalytic activity and yielded high molecular weight PE. The catalytic activity was optimized by varying the polymerization conditions and incorporating other co-catalysts. PEs with tunable branches and high melting points were obtained, and the fluorine atoms on N-aryl groups and terminal hydroxyl group in these complexes had positive effects on the catalytic activity.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Materials Science, Characterization & Testing
Holger Plasser, Guenther Mayr, Gernot Mayr, Philipp Zallinger, Bernhard Plank, Guenther Hendorfer, Zoltan Major
Summary: High strength and low density make epoxy-based CFRP a highly interesting construction material for the aerospace manufacturing industry. Porosity is an unavoidable defect that significantly weakens the strength values dominated by the matrix. This study demonstrates the quantitative estimation of porosity by pulsed thermography on a multi-axial laminate fabricated from unidirectional Prepregs for the first time.
JOURNAL OF NONDESTRUCTIVE EVALUATION
(2023)
Article
Chemistry, Physical
Faruk Okur, Huanyu Zhang, Dogan Tarik Karabay, Konrad Muench, Annapaola Parrilli, Antonia Neels, Walid Dachraoui, Marta D. Rossell, Claudia Cancellieri, Lars P. H. Jeurgens, Kostiantyn V. Kravchyk, Maksym V. Kovalenko
Summary: The formation of cavities at the LLZO/Li interface hinders the further development of Li-garnet solid-state batteries. To address this issue, a method of fabricating porous LLZO membranes is proposed, which not only reduces cavity formation but also increases energy densities. The fabricated porous LLZO membranes exhibit long cycling stability.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Lars Lueder, Peter Niraj Nirmalraj, Antonia Neels, Rene Michel Rossi, Michel Calame
Summary: Wearable sensors can provide important insight into a patient's health status by monitoring the concentration of specific biomarkers in body fluids. The integration of nanoporous metal-organic framework (MOF) particles with nitrocellulose (NC) fibrous layers using an electrospinning approach has been demonstrated, showing the efficiency of the MOF@NC structure as biosensors. The sensitivity and selectivity of this approach make it a promising platform for versatile and adaptable sensing of biomarkers.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Ruikai Wu, Tim M. Lenz, Lucas Stieglitz, Raphael Galois, Ruohan Zhao, Patrick Rupper, Sandro Lehner, Milijana Jovic, Antonia Neels, Sabyasachi Gaan, Bernhard Rieger, Manfred Heuberger
Summary: This study demonstrates the crucial role of heterogeneous surface support in determining polymer microstructure, and explores a novel variant of Ni-catalyst from the family of late-transition metal complexes, which expands the toolbox for novel catalytic solutions in industrial processes.
JOURNAL OF CATALYSIS
(2023)
Article
Materials Science, Multidisciplinary
Simone Dolabella, Alexandre Reinhardt, Ausrine Bartasyte, Samuel Margueron, Amit Sharma, Xavier Maeder, Alex Dommann, Antonia Neels, Aurelio Borzi
Summary: This study aims to understand the physics of the recrystallization process of CIS-damaged LNO crystal upon thermal annealing. The recovery of the crystallinity from the CIS-induced lattice strain and stress, as well as the progressive reduction of the defects clusters dimension, were studied using high-resolution X-ray diffraction, micro-Raman backscattering spectroscopy, and Transmission Electron Microscopy (TEM).
MATERIALS & DESIGN
(2023)
Article
Biochemistry & Molecular Biology
Khalifah A. Salmeia, Akef T. Afaneh, Reem R. Habash, Antonia Neels
Summary: Organophosphorus chemicals play versatile and important roles in the industry, with Trivinylphosphine oxide (TVPO) being a promising flame-retardant additive. Density functional theory (DFT) simulations were conducted to investigate the kinetic and thermodynamic processes of TVPO's nucleophilic addition reactions for a better understanding of its polymerization mechanisms. Experimental X-ray single-crystal study of TVPO supported the computed findings. TVPO was synthesized by a temperature-dependent reaction using POCl3 and VMB, with the thermodynamically favorable product being preferentially formed at low temperatures. The anionic addition polymerization of TVPO and VMB occurs when the reaction temperature rises, following a pseudo-Michael addition reaction mechanism.
Article
Materials Science, Characterization & Testing
Bin Ma, Qingzhao Kong, Yewei Ding, Lin Chen, Weihang Gao
Summary: This study proposes an end-to-end damage detection framework that integrates emphasized channel attention, propagation, and aggregation-time-delay neural network (ECAPA-TDNN) with percussion techniques. The framework effectively detects internal damage within timber structures and distinguishes between different sizes of damage.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Zhiyuan Zhao, Lishuai Liu, Wen Liu, Da Teng, Yanxun Xiang, Fu-Zhen Xuan
Summary: The total focusing method (TFM) is a standard technique in ultrasonic phased array imaging and plays a crucial role in industrial non-destructive testing (NDT). This paper presents an improved TFM approach by formulating its imaging principle as a Boolean matrix and establishing a discretized tensor-based model. By employing sparse regularization strategy and a non-negative constraint solution algorithm, the proposed approach demonstrates superior capabilities in defect characterization and noise suppression compared to the traditional TFM.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Dongsoo Lee, Jung-Doung Yu, Seokgyu Jeong, Geunwoo Park, Jong-Sub Lee
Summary: This study suggests a more accurate method for evaluating the integrity of drilled shafts using electromagnetic waves propagating through transmission lines. The experimental results show that the location and size of sound and defect segments can be more clearly identified with the use of connectors on the transmission line.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Lu-Nan Dai, Chen-Yin Ni, Kai-Ning Ying, Ling Yuan, Zhi Yang, Wei-Wei Kan, Zhong-Hua Shen
Summary: A laser ultrasonics based frequency domain synthetic aperture focusing technology has been developed for imaging internal horizontal hole defects in bimetallic composites with a diameter of approximately 1.0 mm. The results show that this technology can improve imaging quality and locating capability, with a low testing error.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Guillermo Cosarinsky, Jorge F. Cruza, Mario Munoz, Jorge Camacho
Summary: This study develops an ultrasound imaging method for industrial and structural components, which can automatically detect the surface and estimate the probe position and orientation. By fitting the parametric models based on measured surface echoes, the method achieves the measurement of surface echoes and estimation of probe position and orientation. Validation experiments show that this method can accurately detect defects in the component under different probe positions and orientations.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
L. Gahleitner, G. Thummerer, G. Mayr, G. Mayr, P. Burgholzer, U. Cakmak
Summary: This study presents a one-dimensional photothermal method using the virtual wave concept to estimate subsurface interface parameters and demonstrates its application in layered materials. Experimental results validate the accurate estimation of interfacial parameters for the analyzed samples.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Pengxiang Ji, Yiming Jiang, Ruobing Zhao, Jing Zou
Summary: Computed laminography (CL) is a non-destructive imaging technique for plate-like samples that has challenges in exact reconstruction. Fusion laminography (FL) combines Fourier information from CL and CT to achieve precise reconstruction, showing superiority in artifact removal and edge preservation, particularly for irregular sample structures.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Guangzhi Chen, Odile Abraham, Damien Pageot, Olivier Durand, Mathieu Chekroun, Vincent Tournat
Summary: This paper investigates the application of Nonlinear Coda Wave Interferometry (NCWI) method in evaluating the nonlinear interface areas in highly heterogeneous materials. An experimental protocol is proposed and validated through numerical simulation and experimental results. The findings demonstrate that NCWI can be used to quantitatively analyze the nonlinear interface effects in complex media.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Ronghua Xu, Raul Enrique Beltran-Gutierrez, Max Kaeding, Alexander Lange, Steffen Marx, Joern Ostermann
Summary: This study compares the signal response of four different couplant materials in acoustic emission analysis and ultrasonic testing, and analyzes their impact on the signal response of a piezoelectric sensor. The results indicate that acrylic adhesive pads and hot glue demonstrate more reliable signal transmission in certain frequency ranges, while honey and vaseline perform better in other frequency ranges. Acrylic adhesive pads and honey are considered the preferred couplant materials.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Yong-Ho Kim, Jung-Ryul Lee
Summary: An artificial intelligence system for phased-array ultrasonic testing (PAUT) was developed in this study using a newly configured training dataset and neural network. Three experiments were conducted to verify its performance, showing improved classification accuracy of signals and successful data evaluation, benefiting the PAUT experts.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Shaun Mcknight, S. Gareth Pierce, Ehsan Mohseni, Christopher Mackinnon, Charles Macleod, Tom 'Hare, Charalampos Loukas
Summary: This work proposes four synthetic data generation methods to address the issue of limited training data in Non-Destructive Ultrasonic Testing. Experimental results demonstrate that these methods significantly improve the classification performance of real experimental images.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Xintao Xu, Zhixuan Chang, Eryong Wu, Shiwei Wu, Jian Chen, Keji Yang, Haoran Jin
Summary: This paper proposes a novel nozzle-side inspection method based on the data fusion of multi-view plane wave imaging (PWI) for ultrasonic non-destructive testing of nozzle-to-pipe welds. Experiments demonstrate the capability of sensitivity mappings to optimize the inspection configuration and serve as filters to fuse multi-view images. The proposed method enables accurate defect characterization and detection of slag, cracks, and lack of penetration in nozzle specimens.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Kai Wang, Zechen Luo, Shuang Xu, Wenxin Lai, Ruiqi Guan, Qijian Liu, Menglong Liu, Jing Rao, Xinlin Qing
Summary: In this study, an analytical framework is proposed to interpret the formation of defect-induced LDR in multilayered structures. By analyzing the reflections of Lamb waves at defect boundaries and obtaining the phase shift of reflected waves, the relationship between LDR frequency components and defect size is determined. Experimental validations are performed to improve the precision of defect characterization using LDR.
NDT & E INTERNATIONAL
(2024)
Article
Materials Science, Characterization & Testing
Shijie Jin, Chengjun Di, Jiakai Su, Siqi Shi, Zhongbing Luo
Summary: This paper proposes a mirrored composite-mode total focusing method (CTFM) for the quantitative detection and profile characterization of priori unknown irregular planar defects. Multiple views and normalization are used to achieve accurate imaging results.
NDT & E INTERNATIONAL
(2024)
