Article
Metallurgy & Metallurgical Engineering
Yu Zhang, Laure Bourgeois, Yu Chen, Zhuoran Zeng, Nick Birbilis, Philip N. H. Nakashima
Summary: Magnesium-lithium alloys with high lithium content are of interest due to their low density, high formability, and corrosion resistance. Mapping the distribution of lithium in the presence of magnesium is challenging. This study demonstrates a ratio spectrum-imaging method using electron energy-loss spectroscopy (EELS) to map lithium. Applied to LAZ941 (Mg-9Li-4Al-1Zn in wt.%), this technique reveals that a key precipitate previously thought to be Mg17Al12 is actually rich in lithium. Structural investigation confirms this phase as Al1-xZnxLi, with x << 1. This work highlights the potential of this technique for lithium mapping in materials.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Materials Science, Multidisciplinary
Ke Ran, Liudmila Fischer, Stefan Baumann, Wilhelm A. Meulenberg, Kerstin Neuhaus, Joachim Mayer
Summary: Dual-phase oxygen transport membranes (DP-OTMs) provide a good alternative for oxygen separation, with the performance of CGO-FCO composite dominated by CGO grain boundaries. However, the atomistic environment of the boundaries remains largely unknown, limiting the optimization of membrane performance. Using advanced transmission electron microscopy techniques, researchers quantified the atomic and chemical structures of CGO boundaries in CGO-FCO membranes, providing insights for optimized membrane processing.
Article
Chemistry, Multidisciplinary
Andrea Konecna, Fadil Iyikanat, F. Javier Garcia de Abajo
Summary: The study demonstrates the possibility of identifying single isotope atom impurities in a nanostructure using transmission electron microscopy and spectroscopy. It shows the superior spatial resolution and ability to probe complete sets of vibrational modes by electron beams compared to conventional far-field spectroscopy.
Article
Mechanics
Meysam Sheykhi
Summary: The vibroacoustic performance of star-shaped honeycomb-core annular cellular structures is investigated and compared with hexagonal honeycomb-core annular structures, showing the superiority of the star-shaped structures. The spectral element method is used to evaluate natural frequencies and dynamic responses accurately, and the mechanical and vibroacoustic characteristics of the structures are analyzed by deriving the in-plane effective shear modulus of star-shaped honeycombs.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Materials Science, Multidisciplinary
N. N. Badr, F. Long, Y. Luo, M. Topping, L. K. Beland, Z. Yao, L. Balogh, M. R. Daymond
Summary: The crystal structure of the interfacial areas of a water-quenched nano-hydride was characterized using electron energy-loss spectroscopy and electron diffraction. Plasmon energy values of 17.4±0.01 eV and 18.3±0.01 eV were observed in the interfacial area, but the existence of the ζ- and γ-phases was ruled out. Simulations suggested that the observed energy values could be attributed to the delocalized nature of plasmon vibration and the effect of the interface on shifting the plasmon vibration frequency.
Article
Biochemistry & Molecular Biology
Charles Coluzzi, Martin Guillemet, Fanny Mazzamurro, Marie Touchon, Maxime Godfroid, Guillaume Achaz, Philippe Glaser, Eduardo P. C. Rocha
Summary: Horizontal gene transfer has a significant impact on the evolution of core genes, with mutations providing resistance to antibiotics and shaping the emergence of adaptive mutations. The rapid accumulation of these mutations increases the acquisition rate of other antibiotic resistances, leading to multidrug resistance.
MOLECULAR BIOLOGY AND EVOLUTION
(2023)
Article
Multidisciplinary Sciences
Sara Marti-Sanchez, Marc Botifoll, Eitan Oksenberg, Christian Koch, Carla Borja, Maria Chiara Spadaro, Valerio Di Giulio, Quentin Ramasse, F. Javier Garcia de Abajo, Ernesto Joselevich, Jordi Arbiol
Summary: The curvature and morphology of the core affect the growth of the shell and induce electronic band modulations in ZnSe@ZnTe nanowires. The relaxation mechanisms of strain during epitaxial growth play a crucial role in determining the morphologies, crystal structures, and properties of core-shell nanostructures. The core morphology influences the formation of the shell involving plane bending and the creation of low-angle polar boundaries.
NATURE COMMUNICATIONS
(2022)
Article
Optics
Ganna Platonova, Dalibor Stys, Pavel Soucek, Kirill Lonhus, Jan Valenta, Renata Rychtarikova
Summary: The most realistic information about a transparent sample such as a live cell can be obtained using bright-field light microscopy. A spectroscopic approach is proposed for the correction of 12-bit-per-channel data, ensuring that the final intensities of the corrected images are proportional to the photon fluxes detected by a camera sensor.
Article
Thermodynamics
Junjie Dong, Rui Deng
Summary: The indoor comprehensive analysis of core saturation of airtight coring wells is crucial for well logging interpretation. This study combines two methods for saturation correction and verifies the feasibility of the comprehensive correction method through comparison with logging interpretation results and adjacent wells.
Article
Materials Science, Multidisciplinary
Misa Hayashida, Marek Malac
Summary: This study utilized energy-filtering analysis and bright-field microscopy to measure the thickness of materials samples, and verified the results through electron tomography. The study reported the relationship between thickness and beam intensity in energy-filtering and bright-field microscopy at different angles, and evaluated the mean free path of several materials. These results can guide the evaluation of thickness and optimize electron tomography experiments in energy-filtering and bright-field microscopy.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Susumu Yamada
Summary: This study utilized a spherical aberration-corrected scanning transmission electron microscope to analyze the electronic structures of dislocations in 9Cr steel, observing that dislocations broaden a zero-loss peak and induce an absorption phenomenon. The use of a spectrum-imaging method allows imaging of dislocations, providing a promising technique for detecting dislocations in high Cr steel.
PHILOSOPHICAL MAGAZINE LETTERS
(2021)
Article
Optics
Li Jia, Tian Boyu, Yu Jiangchuan, Zhang Bin
Summary: Solid-state tube lasers with zigzag beam paths (SSZTLs) combine the advantages of rod and slab lasers, but correcting their beam quality remains a challenge. The proposed self-correction method can significantly improve the distortion of the laser beam, thereby enhancing the output beam quality.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2021)
Article
Optics
Jin Xiaoling, Wang Youwei, Sun Bing, Zhang Zuxing, Chen Mingyang
Summary: OAM beams have gained interest for their applications in optical manipulation, quantum information, imaging, and communication. Using ring-core PCF structures can effectively guide OAM modes, reduce coupling, and enhance communication performance in fiber optic systems.
CHINESE JOURNAL OF LASERS-ZHONGGUO JIGUANG
(2021)
Article
Materials Science, Multidisciplinary
Parivash Moradifar, Austin G. Nixon, Tiva Sharifi, Tim Brandt Driel, Pulickel Ajayan, David J. Masiello, Nasim Alem
Summary: The Bi2Te3/Sb2Te3 in-plane heterostructure is a low-dimensional tunable chalcogenide with promising plasmonic properties in the visible-UV spectral range. Electron-driven plasmon excitations of low-dimensional Bi2Te3/Sb2Te3 are investigated, and singular value decomposition is used to identify the nanoscale spatial distribution of various plasmonic resonances. Defect-plasmon interactions are explored, revealing the tunability of plasmonic response through controlled structural defects. Experimental observations are qualitatively compared and validated with numerical simulations.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Engineering, Chemical
Makarand R. Gogate
Summary: The study focuses on the surface phenomena in heterogeneous catalysis, emphasizing the importance of active sites in surface processes. Examples from HR-TEM studies illustrate the characteristics of surface discontinuities and active sites, highlighting their geometric and electronic properties.
CHEMICAL ENGINEERING COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Ivy M. Asuo, Dawit Gedamu, Ibrahima Ka, Luis Felipe Gerlein, Francois-Xavier Fortier, Alain Pignolet, Sylvain G. Cloutier, Riad Nechache
Article
Instruments & Instrumentation
J. Plathier, A. Pignolet, A. Ruediger
REVIEW OF SCIENTIFIC INSTRUMENTS
(2018)
Article
Chemistry, Multidisciplinary
Ibrahima Ka, Ivy M. Asuo, Suchismita Basu, Paul Fourmont, Dawit M. Gedamu, Alain Pignolet, Sylvain G. Cloutier, Riad Nechache
Article
Chemistry, Multidisciplinary
Ivy M. Asuo, Paul Fourmont, Ibrahima Ka, Dawit Gedamu, Soraya Bouzidi, Alain Pignolet, Riad Nechache, Sylvain G. Cloutier
Article
Energy & Fuels
Ivy M. Asuo, Ibrahima Ka, Dawit Gedamu, Alain Pignolet, Riad Nechache, Sylvain G. Cloutier
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2019)
Article
Multidisciplinary Sciences
Debika Banerjee, Ivy M. Asuo, Alain Pignolet, Sylvain G. Cloutier
SCIENTIFIC REPORTS
(2019)
Article
Energy & Fuels
Ivy M. Asuo, Soraya Bouzidi, Ibrahima Ka, Federico Rosei, Alain Pignolet, Riad Nechache, Sylvain G. Cloutier
Summary: The study presents a new CuSCN layer as an alternative to conventional Spiro-OMeTAD HTM in solar cells. Solar cells made with CuSCN achieve high power conversion efficiency and remarkable ambient stability, while photodetectors with CuSCN exhibit high specific detectivity. Solution-processed devices show impressive performances, representing a significant step towards large-scale fabrication of efficient and stable perovskite-based optoelectronic technologies.
Article
Materials Science, Multidisciplinary
Ivy M. Asuo, Debika Banerjee, Alain Pignolet, Riad Nechache, Sylvain G. Cloutier
Summary: The hybrid photodetector fabricated with a halide perovskite and silicon nanowire heterojunction shows excellent spectral responsivity, high specific detectivity, fast rise/fall times, and good stability under ambient conditions, offering great potential for future integrated optoelectronic devices.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Chemistry, Physical
Wei Zhao, Hongjie Xu, Hengwei Luan, Na Chen, Pan Gong, Kefu Yao, Yang Shen, Yang Shao
Summary: This study elucidates the growth mechanism of NiFe-LDH@IF, optimizes corrosion conditions, and improves electrocatalytic performance, providing guidance for the preparation of self-supported LDH for hydrogen production.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Wei Zhao, Hsiang-Shun Chang, Kefu Yao, Yang Shao
Summary: A novel method is proposed to synthesize B-ZnO NWA by immersing Zn NWA in NaOH solution at room temperature. The growth mechanism of B-ZnO NWA is clarified through systematic investigation of various factors. By adjusting the pore structure of templates, hot-pressing parameters, NaOH concentration, solution temperature, and immersion time, the morphology of B-ZnO NWA is controlled. The prepared B-ZnO NWA with hollow trunks has potential applications in solar energy conversion.
Article
Chemistry, Multidisciplinary
Thameur Hajlaoui, Catalin Harnagea, Alain Pignolet
Summary: Multiferroic thin films are promising materials that integrate multiple functionalities. Novel multiferroic heterostructures, combining good ferroelectric and ferromagnetic properties and a strong coupling between them, have been developed. Ba2EuFeNb4O15/BaFe12O19 multiferroic magnetoelectric bilayers were epitaxially grown on niobium doped SrTiO3 substrates. The heterostructure demonstrated both ferroelectric and magnetic properties at room temperature, and a strong magnetoelectric coupling was observed. The coupling is mediated by elastic strain at the interfaces.
Article
Chemistry, Multidisciplinary
Ifeanyichukwu C. Amaechi, Andreas Ruediger, Alain Pignolet
Summary: We conducted systematic measurements on bismuth titanate powders to study the Raman frequency shift, omega, and full width at half maximum (FWHM) of optical phonons at q = 0. The observed shift and broadening of the ferroelectric soft phonon mode at 42 cm(-1) can be reasonably explained by the effects of particle size and phonon confinement. We found that the lattice parameter varies linearly with particle size, and the size-dependent Raman shift and linewidth broadening follow a power law of omega proportional to x(-0.73) and Gamma proportional to x(-0.38), respectively. Additionally, a single phonon coupling term corresponding to a three-phonon anharmonic process is sufficient to describe the phonon coupling decay resulting from the softening of this strongly overdamped phonon mode.
Article
Engineering, Environmental
Jiajia Si, Xinglong Yang, Hengwei Luan, Hongjie Xu, Chanjuan Xi, Yang Shao, Kefu Yao
Summary: It has been found that high alkalinity has an unexpected promoting effect on the degradation of azo dyes, and the crucial impact of oxygen and the underlying mechanism have been revealed. Removing dissolved oxygen can significantly improve the kinetic degradation rate in alkaline condition.
CHEMICAL ENGINEERING JOURNAL ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
Xuanliang Zhao, Zhongyang Deng, Wei Zhao, Bin Feng, Min Wang, Meirong Huang, Lei Liu, Guisheng Zou, Yang Shao, Hongwei Zhu
Article
Chemistry, Physical
Yilun Huang, Yunkai Shi, Qianming Gong, Mouyi Weng, Yuyao Li, Jianning Gan, Dazhi Wang, Yang Shao, Ming Zhao, Daming Zhuang, Ji Liang, Feng Pan, Hongwei Zhu, Cewen Nan
JOURNAL OF MATERIALS CHEMISTRY A
(2019)