Article
Nanoscience & Nanotechnology
Jing-Yang Chung, Li Zhang, Govindo J. J. Syaranamual, Silvija Gradecak, Stephen J. J. Pennycook, Michel Bosman
Summary: We provide an overview of the atomic structure of extended defects in wurtzite III-nitrides, specifically focusing on GaN heterostructures applicable to optoelectronic devices and power electronics. We present experimental methods to visualize and recognize these defects using aberration-corrected scanning transmission electron microscopy (STEM). Line, planar, and volume defects are imaged, with examples taken from InGaN multi quantum well heterostructures. The classification of defects and visualization methods established in this work will be valuable for researchers in this field.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Brenton Cook, Philipp Reineck, Thomas Shiell, Jodie Bradby, Bryan D. Esser, Joanne Etheridge, Bianca Haberl, Reinhard Boehler, David R. Mckenzie, Dougal G. McCulloch
Summary: Diamond is a crucial material for biosensors, quantum computing, and space components due to its unique properties at the nanoscale. Researchers have successfully synthesized oriented, faceted diamond particles by flash laser heating of glassy carbon, and observed their microstructure and periodicity.
Article
Materials Science, Ceramics
Lingfeng He, Tiankai Yao, Kaustubh Bawane, Miaomiao Jin, Chao Jiang, Xiang Liu, Wei-Ying Chen, J. Matthew Mann, David H. Hurley, Jian Gan, Marat Khafizov
Summary: The early stage of microstructural evolution of ThO2 under krypton irradiation was studied using in situ transmission electron microscopy (TEM). The growth rate and density of dislocation loops were investigated with changing irradiation temperature and ion dose. Different types of dislocation loops were determined using various TEM techniques, and diffusion coefficients of different defects were extracted using a rate theory model.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Steve Johns, Timothy Yoder, Karthik Chinnathambi, Rick Ubic, William E. Windes
Summary: This study found that thermal annealing of nuclear graphite at 2500 degrees C can lead to the formation of fullerene-like defects, which may directly contribute to the non-recoverable physical property changes observed in irradiated nuclear graphites.
MATERIALS CHARACTERIZATION
(2022)
Article
Chemistry, Physical
Jin-Hu Dou, Maxx Q. Arguilla, Yi Luo, Jian Li, Weizhe Zhang, Lei Sun, Jenna L. Mancuso, Luming Yang, Tianyang Chen, Lucas R. Parent, Grigorii Skorupskii, Nicole J. Libretto, Chenyue Sun, Min Chieh Yang, Phat Vinh Dip, Edward J. Brignole, Jeffrey T. Miller, Jing Kong, Christopher H. Hendon, Junliang Sun, Mircea Dinca
Summary: Researchers have successfully grown single crystals of 2D metal-organic frameworks up to 200 µm in size by balancing in-plane and out-of-plane interactions, revealing anisotropic transport and a clear correlation between conductivity and the nature of the metal cation in the sheets.
Article
Chemistry, Physical
P. Zhao, L. Feng, K. Nielsch, T. G. Woodcock
Summary: The study conducted detailed microstructural characterization in both as-transformed and hot deformed samples of tau-MnAl-C using transmission electron microscopy. After hot deformation, main defects in recrystallized grains include true twins, dislocations, intrinsic stacking faults, and Mn3AlC precipitates. The presence of significant non-recrystallized grains with microstructures based on combinations of true twins, dislocations, and deformation bands was also observed.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Fenfa Yao, Yongqing Cai, Zhangru Xiao, Gang Zhang, Rong-Jun Xie, Chuanhong Jin
Summary: Structural defects, including di-vacancies, vacancy clusters, and vacancy lines, were investigated in atomically thin black phosphorus (BP) using in situ high-resolution transmission electron microscopy. The study revealed the formation and dynamic behaviors of vacancy defects and their effects on the electronic structure of the host BP monolayers, providing insights for the design and fabrication of BP-based devices.
Article
Nanoscience & Nanotechnology
Haibo Zhang, Yidi Shen, Simanta Lahkar, Takeshi Fujita, Kevin Hemker, Qi An, Kolan Madhav Reddy
Summary: Experimental findings suggest that the unique distorted structure in T-B-50 is stabilized by large shear strain and lattice rotation near planar faults, while quantum mechanics simulations show that this structure has lower energy and satisfies the electron counting rule for B-12 icosahedral clusters.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Multidisciplinary
Celesta S. Chang, Jiaxin Sun, Seunghyun Khim, Andrew P. Mackenzie, Darrell G. Schlom, David A. Muller
Summary: By studying single crystals and epitaxial thin films, we have found that ribbonlike defects are dominant in single-crystal PdCoO2, while different types of defects arising from substrate termination disrupt the lateral connectivity of the conducting planes in thin films. To enhance the quality of PdCoO2 films, selecting a proper substrate, improving surface quality, and reducing the step density are key factors.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Ivan S. Pavlov, Anna G. Ivanova, Vladimir P. Filonenko, Igor P. Zibrov, Alexei E. Voloshin, Pavel V. Zinin, Alexander L. Vasiliev
Summary: This study investigates the formation of boron carbide superhard particles through a liquid-phase reaction at high pressure and high temperature. The synthesized particles exhibit a rhombic hexecontahedron morphology with twelve five-vertex stars. Electron microscopy and X-ray diffraction were used to analyze the crystal structure of these particles, revealing multiple cycling twinning rather than quasi-crystalline symptoms. The specific shape of the particles is explained by the decrease of surface energy during formation at high pressure and high temperature.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Zonglin Li, Mingxin Xie, Guozheng Nie, Junhui Wang, Lujun Huang
Summary: In this study, we developed an optical biosensor based on an all-dielectric metasurface with broken symmetry. The biosensor exhibited excellent performance, thanks to the high-Q quasi-bound states in the continuum (qBICs) and the efficient field confinement. It has potential applications in extreme biochemical sensing, such as COVID-19 detection at ultralow concentrations.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Carsten Dittmayer, Hans-Hilmar Goebel, Frank L. Heppner, Werner Stenzel, Sebastian Bachmann
Summary: The study introduces a method for automated acquisition of data on all structures in EM sections, significantly improving efficiency. A sample preparation method has been established to ensure the acquisition of complete sections without artifacts. The use of LDS will greatly facilitate access to EM data for various applications.
MICROSCOPY AND MICROANALYSIS
(2021)
Article
Microbiology
Monika Kakol, Ezher Tagliasacchi, Andrzej Borkowski, Miroslaw Slowakiewicz
Summary: The nutritional condition of seed mussels used in New Zealand's Greenshell mussel aquaculture industry shows high variability, which may contribute to the marked variation observed in spat performance. Environmental factors that limit feeding during harvest and transport of spat are likely influencing the quality of spat used by the industry. Measures to improve the quality of wild spat supply, such as testing nutritional condition and developing nursery culture methods and artificial spat feeds, are needed.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Gowtham Sriram Jawaharram, Christopher M. Barr, Khalid Hattar, Shen J. Dillon
Summary: In a series of nanopillar compression tests on tungsten, the effects of surface oxidation on deformation were studied using in situ heating, revealing a mechanism for localized plasticity. The results suggest that the constraint imposed by surface oxidation may lead to the growth of whiskers, similar to the whisker growth mechanism. The study also discussed the similarities between the tungsten fuzz growth mechanism and whisker growth in different conditions.
Article
Chemistry, Multidisciplinary
Junyan Li, Alvaro Mayoral, Yoshihiro Kubota, Satoshi Inagaki, Jihong Yu, Osamu Terasaki
Summary: Incorporating hetero-metal atoms into zeolite structures can enhance catalytic activity and selectivity in oxidation reactions. However, the rational design of zeolites with specific titanium sites is challenging due to the unclear atomic structure during synthesis. This study successfully synthesized a titanosilicate with predictable titanium distribution by mediating vacancies in a defective MSE-type zeolite precursor.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Materials Science, Multidisciplinary
F. Doering, C. Eberl, S. Schlenkrich, F. Schlenkrich, S. Hoffmann, T. Liese, H. U. Krebs, S. Pisana, T. Santos, H. Schuhmann, M. Seibt, M. Mansurova, H. Ulrichs, V. Zbarsky, M. Muenzenberg
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2015)
Article
Physics, Applied
T. Fricke-Begemann, N. Wang, P. Peretzki, M. Seibt, J. Ihlemann
JOURNAL OF APPLIED PHYSICS
(2015)
Article
Materials Science, Multidisciplinary
Johannes Christian Leutenantsmeyer, Vladyslav Zbarsky, Marvin von der Ehe, Steffen Wittrock, Patrick Peretzki, Henning Schuhmann, Andy Thomas, Karsten Rott, Guneter Reiss, Tae Hee Kim, Michael Seibt, Markus Muenzenberg
MATERIALS TRANSACTIONS
(2015)
Article
Physics, Applied
O. Medvedev, O. Vyvenko, E. Ubyivovk, S. Shapenkov, A. Bondarenko, P. Saring, M. Seibt
JOURNAL OF APPLIED PHYSICS
(2018)
Article
Microscopy
Tobias Meyer, Sergei Lopatin, Michael Seibt, Vladimir Roddatis
Article
Materials Science, Multidisciplinary
Christoph Flathmann, Hendrik Spende, Tobias Meyer, Patrick Peretzki, Michael Seibt
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Lin Tian, Yue-Qing Yang, Tobias Meyer, Dominik Toennies, Vladimir Roddatis, Hendrik Voigt, Xin-Ai Zhao, Zhang-Jie Wang, De-Gang Xie, Michael Seibt, Cynthia A. Volkert, Zhi-Wei Shan
MATERIALS RESEARCH LETTERS
(2020)
Article
Physics, Condensed Matter
Philipp Saring, Michael Seibt
Summary: The study focused on excess carrier recombination and charge collection within NiSi2 platelets, revealing that atomically thin silicide layers embedded in silicon have properties similar to bulk NiSi2. A special preparation protocol consisting of a two-step cooling procedure and in situ EBIC/FIB method was developed.
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
(2021)
Article
Microscopy
Tobias Meyer, Tobias Westphal, Birte Kressdorf, Ulrich Ross, Christian Jooss, Michael Seibt
Summary: Transmission electron microscopy is a major characterization tool with challenges in preparing high-quality electron-transparent lamellae. While plan-view orientation for studying macroscopic specimen surfaces is often required in solid state physics and materials science, existing plan-view lamellae preparation techniques have lower yield compared to cross-sectional methods. Combining mechanical grinding with backside lift-out in focused ion beam can improve the ease of plan-view lamellae preparation.
Article
Chemistry, Physical
Tobias Meyer, Birte Kressdorf, Vladimir Roddatis, Jorg Hoffmann, Christian Jooss, Michael Seibt
Summary: The study investigates the rich phase diagram of Pr1-xCaxMnO3 and the structural transition in epitaxial thin films, highlighting the importance of controlling the environment during heating.
Article
Materials Science, Multidisciplinary
Philipp Saring, Nikolay Abrosimov, Michael Seibt
Summary: Studying the formation of nickel precipitates in silicon and finding that excess vacancies bound into nitrogen-vacancy complexes can enhance the nucleation of nickel precipitates, providing insights into the nucleation process of nickel precipitates.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Crystallography
Tobias Niemeyer, Kevin Meyer, Christoph Flathmann, Tobias Meyer, Daniel M. Schaadt, Michael Seibt
Summary: This study investigated the microstructure of GaN thin films grown on (100) MgF2 substrates at 525 and 650 degrees Celsius using plasma-assisted molecular beam epitaxy. The results showed that predominant cubic (111), (115), and (110) GaN orientations were observed at both growth temperatures, with no preferred nucleation on the substrate and typical grain sizes of 100-200 nm. The higher growth temperature resulted in a significantly higher twin density and surface roughness.
JOURNAL OF CRYSTAL GROWTH
(2023)
Article
Physics, Applied
B. Kressdorf, T. Meyer, A. Belenchuk, O. Shapoval, M. ten Brink, S. Melles, U. Ross, J. Hoffmann, V Moshnyaga, M. Seibt, P. Blochl, C. Jooss
PHYSICAL REVIEW APPLIED
(2020)
Proceedings Paper
Physics, Applied
A. S. Prikhodko, N. I. Borgardt, M. Seibt
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 12, NO 8
(2015)
Proceedings Paper
Physics, Applied
M. V. Lovygin, N. I. Borgardt, I. P. Kazakov, M. Seibt
PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 12, NO 8
(2015)
