Article
Chemistry, Multidisciplinary
Ryo Ishikawa, Yujiro Ueno, Yuichi Ikuhara, Naoya Shibata
Summary: This study reveals the formation of chemically ordered intermetallic nanoparticles and impregnation of nanoparticles into the oxide substrate at high temperatures. Negative charge transfer from the intermetallic nanoparticles to the oxide surface is observed and found to strongly affect the catalytic activities.
Review
Chemistry, Multidisciplinary
Haofei Zhao, Yuchen Zhu, Huanyu Ye, Yang He, Hao Li, Yifei Sun, Feng Yang, Rongming Wang
Summary: Nanocrystals play a crucial role in material sciences and industry. Designing nanocrystals with desired structures and properties is a major challenge that requires a deep understanding of atomic-scale dynamics. In situ transmission electron microscopy (TEM), especially environmental TEM, has provided valuable insights into nanocrystals. This comprehensive review highlights the progress in the understanding of nanocrystal dynamics, including nucleation and growth, structure evolution, and dynamics in reaction conditions.
ADVANCED MATERIALS
(2023)
Article
Biochemical Research Methods
Tiqing Zhao, Youhong Jiang, Shiwen Luo, Yifan Ying, Qian Zhang, Shi Tang, Linzhi Chen, Jing Xia, Peng Xue, Jia-Jun Zhang, Shi-Gang Sun, Hong-Gang Liao
Summary: The study focuses on the catalysis reaction mechanism at the nano/atomic scale and the limitations of current in situ characterization technologies. By combining in situ transmission electron microscopy (TEM) holder system with MEMS chips, an ultra-stable heating chip is developed to achieve atomic resolution imaging during the heating process at high temperature. The developed gas reaction cells with ultra-low drift enable the identification of nanoparticle's structure evolution at the atomic scale.
Article
Chemistry, Multidisciplinary
Mei Wang, Asher C. Leff, Yue Li, Taylor J. Woehl
Summary: This study successfully demonstrated the in situ controlled synthesis of alloyed AuCu nanocrystals under LP-TEM, while maintaining the molecular structure of metal thiolate complexes. The research revealed that polymer capping ligands not only have known functions during LP-TEM synthesis, but also prevent copper oxidation and facilitate the formation of prenucleation cluster intermediates.
Article
Chemistry, Multidisciplinary
Hoduk Cho, Ivan A. Moreno-Hernandez, Vida Jamali, Myoung Hwan Oh, A. Paul Alivisatos
Summary: The study uses liquid-phase transmission electron microscopy and electron beam lithography to investigate interactions between nanorods in a predefined potential energy landscape. By changing starting spatial arrangements, the self-assembly behavior of nanorods following lift-off can be tuned.
Article
Chemistry, Multidisciplinary
Hui Zhang, Tao Xu, Yatong Zhu, Wen Wang, Hao Zhang, Dundong Yuan, Litao Sun
Summary: The study revealed oscillatory growth during the oxidation process of silver, influenced by both thermodynamic and kinetic factors. These findings enhance the fundamental understanding of oxidation processes and offer a promising method for the fabrication of desired nanostructures.
Article
Chemistry, Multidisciplinary
Penghui Li, Yeqiang Bu, Linyan Wang, Chong Wang, Junquan Huang, Ke Tong, Yujun Chen, Julong He, Zhisheng Zhao, Bo Xu, Zhongyuan Liu, Guoying Gao, Anmin Nie, Hongtao Wang, Yongjun Tian
Summary: Fracture behaviors in perfect and twinned B4C crystals were studied via in situ TEM mechanical testing. It was found that cracks preferentially initiated at the twin boundaries (TBs) and propagated along them, resulting in the fracture of B4C. The theoretical calculations also showed a softening effect of TBs on B4C, with amorphous bands preferentially nucleated at the TBs. These findings clarify the atomic arrangement and the role of planar defects in the failure of B4C.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Mengyu Gao, Yoonjae Park, Jianbo Jin, Peng-Cheng Chen, Hannah Devyldere, Yao Yang, Chengyu Song, Zhenni Lin, Qiuchen Zhao, Martin Siron, Mary C. Scott, David T. Limmer, Peidong Yang
Summary: Halide perovskite is a unique dynamical system with complex structural and chemical processes, but its intrinsic instability makes real-time investigation challenging. However, our research reveals that atomically thin carbon materials can stabilize ultrathin halide perovskite nanostructures and enable atomic-level visualization of their movement. Protected by carbon shells, these structures maintain their integrity under high electron dose rate and exhibit unusual dynamical behaviors. Our work provides a new method to protect beam-sensitive materials and study structure dynamics of nanomaterials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Wei-Hao Hsu, Tzu-Chieh Yen, Chien-Chun Chen, Chih-Wen Yang, Chung-Kai Fang, Ing-Shouh Hwang
Summary: This study examines ethanol-water mixtures using various techniques and discovers the presence of mesoscopic crystalline structures, which helps to explain some puzzles regarding water-alcohol mixtures.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Multidisciplinary
Fang Liu, Jiashen Meng, Hong Wang, Shulin Chen, Ruohan Yu, Peng Gao, Jinsong Wu
Summary: This study reveals the phase transformations and electrochemical mechanism of tellurium (Te) in potassium-ion batteries (PIBs) using in situ high-resolution transmission electron microscopy and electron diffraction. The results show that the potassium storage in Te is highly reversible, providing implications for the future design of high-performance nanostructured cathodes for PIBs.
Article
Materials Science, Multidisciplinary
Hyun Woo Cha, Byeong-Seon An, Cheol-Woong Yang
Summary: Researchers have proposed a methodology utilizing graphene encapsulation to overcome the challenges in observing early stages of spontaneous solid-liquid reactions using a closed-type liquid cell TEM system. By suspending the reaction until the graphene layer is destroyed, solid and liquid are separated, allowing the reaction to proceed.
MICROSCOPY AND MICROANALYSIS
(2022)
Article
Nanoscience & Nanotechnology
Frank Niessen, Azdiar A. Gazder, David R. G. Mitchell, Elena V. Pereloma
Summary: Microstructure evolution during the 3-point bending of a metastable beta Ti-10V-2Fe-3Al alloy containing 5% alpha was dominated by the formation of deformation-induced alpha '' martensite. The nucleation of alpha '' plates from {580}(alpha '') habit planes at alpha-beta interfaces, impingement with high-angle boundaries, and subsequent thickening led to a build-up of strain energy inducing {130} < 310 >(alpha '') twinning. The study also revealed the activation of {130}< 310 >(alpha '') twinning by alpha '' impingement in a metastable beta matrix.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
L. Fu, C. Yang, R. Wei, X. Pei, J. Teng, D. Kong, Y. Lu, Y. Guo, T. Liu, Y. Hu, B. Yin, Z. Zhang, A. Li, L. Wang, X. Han
Summary: This study investigated the atomic-scale deformation process of AuCu nanowires with a size of 16 nm for the first time, revealing superplasticity and high strength at room temperature. The observed superplasticity was found to originate from continuous full dislocation activities and other factors, differing from previous studies on pure metals.
MATERIALS TODAY NANO
(2021)
Article
Materials Science, Ceramics
Binzhi Liu, Ling Li, Shan-Tao Zhang, Lin Zhou, Xiaoli Tan
Summary: A comparative study was conducted on PNZST/ZnO ceramic composites with different ratios, revealing that the lower ratio (x=0.1) composite exhibited a stable ferroelectric phase at room temperature, transitioning to an antiferroelectric phase upon heating, contributing to the pyroelectric effect. In contrast, the higher ratio (x=0.4) composite showed the presence of Zn2SnO4, leading to the decomposition of the ferroelectric matrix phase and consequently lower pyroelectric coefficient.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Ziqiang Qin, Elizabeth Barsotti, Mohammad Piri
Summary: In this study, new insights into wettability were gained through in situ high-resolution observations, including the fluid-solid occupancies and the physics-based interpretation of sub-nanometer-scale contact angles. Experimental findings revealed density differences between adsorbed wetting film and bulk wetting phase, while discussing the differences between apparent and sub-nanometer contact angles.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Chen Wang, Takuro Hosomi, Kazuki Nagashima, Tsunaki Takahashi, Guozhu Zhang, Masaki Kanai, Hideto Yoshida, Takeshi Yanagida
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Physical
Yutaka Ohno, Jianbo Liang, Naoteru Shigekawa, Hideto Yoshida, Seiji Takeda, Reina Miyagawa, Yasuo Shimizu, Yasuyoshi Nagai
APPLIED SURFACE SCIENCE
(2020)
Article
Chemistry, Physical
Takashi Nakamura, Kento Ohta, Yuta Kimura, Kazuki Tsuruta, Yusuke Tamenori, Ryotaro Aso, Hideto Yoshida, Koji Amezawa
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Jianbo Liang, Yuji Nakamura, Tianzhuo Zhan, Yutaka Ohno, Yasuo Shimizu, Kazu Katayama, Takanobu Watanabe, Hideto Yoshida, Yasuyoshi Nagai, Hongxing Wang, Makoto Kasu, Naoteru Shigekawa
Summary: Direct integration of GaAs and diamond was achieved at room temperature via surface activated bonding, forming an ultrathin crystal defect layer. GaAs TLM patterns on diamond substrates demonstrated excellent heat dissipation properties due to the high thermal conductivity of diamond.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Physics, Applied
Yutaka Ohno, Jie Ren, Shingo Tanaka, Masanori Kohyama, Koji Inoue, Yasuo Shimizu, Yasuyoshi Nagai, Hideto Yoshida
Summary: Through the use of atom probe tomography combined with a focused ion beam operated at -150 degrees C, the three-dimensional distribution of oxygen atoms segregated at sigma 9{114} grain boundaries in Czochralski-grown silicon ingots was analyzed with high spatial resolution. The analysis revealed a narrow segregation range of oxygen atoms across the grain boundary plane, with segregation sites existing at bond-centered sites under tensile stresses above 2 GPa, as calculated by ab initio local stress calculations.
APPLIED PHYSICS EXPRESS
(2021)
Article
Chemistry, Physical
Angela Strass-Eifert, Lars I. van Der Wal, Carlos Hernandez Mejia, Lennart J. Weber, Hideto Yoshida, Jovana Zecevic, Krijn P. de Jong, Robert Guettel
Summary: This study aims to develop bifunctional catalysts to tailor the product spectrum in Fischer-Tropsch synthesis, combining advanced characterizations and experiments under industrial relevant conditions. The acidity and pore structure are found to have a significant impact on the product distribution in the FT and hydroprocessing reactions.
Article
Multidisciplinary Sciences
Takayoshi Katase, Yudai Takahashi, Xinyi He, Terumasa Tadano, Keisuke Ide, Hideto Yoshida, Shiro Kawachi, Jun-ichi Yamaura, Masato Sasase, Hidenori Hiramatsu, Hideo Hosono, Toshio Kamiya
Summary: This study proposed a design route for a direct three-dimensional to two-dimensional structural phase transition and successfully induced this transition in (Pb1-xSnx)Se alloy epitaxial films. The reversible giant electronic property change occurred during this transition process.
Article
Multidisciplinary Sciences
Kohsuke Mori, Naoki Hashimoto, Naoto Kamiuchi, Hideto Yoshida, Hisayoshi Kobayashi, Hiromi Yamashita
Summary: Fabrication of high-entropy alloys (HEAs) nanoparticles (NPs) on conventional catalyst supports remains challenging, but the authors demonstrate that titanium dioxide (TiO2) is a promising platform for the low-temperature synthesis of supported CoNiCuRuPd HEA NPs with excellent activity and durability in CO2 hydrogenation.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Masatoshi Kimura, Xinyi He, Takayoshi Katase, Terumasa Tadano, Jan M. Tomczak, Makoto Minohara, Ryotaro Aso, Hideto Yoshida, Keisuke Ide, Shigenori Ueda, Hidenori Hiramatsu, Hiroshi Kumigashira, Hideo Hosono, Toshio Kamiya
Summary: A large enhancement in thermopower (S) is observed in thin films of LaNiO3 due to heterostructuring, with a 10 times enhancement over the bulk value. This enhancement is attributed to phonon drag effect and enhanced electron-phonon interaction, showing potential for high-performance thermoelectrics in transition-metal oxide heterostructures.
Article
Physics, Applied
Yutaka Ohno, Jianbo Liang, Hideto Yoshida, Yasuo Shimizu, Yasuyoshi Nagai, Naoteru Shigekawa
Summary: The chemical composition around diamond/silicon heterointerfaces fabricated through surface activated bonding (SAB) at room temperature was examined. Iron impurities were found to segregate at the bonding interfaces, while oxygen impurities were found to segregate off the bonding interfaces in the silicon side. When the bonding interfaces were annealed, the amorphous compound converted to cubic silicon carbide (c-SiC) and nano-voids were formed between silicon and c-SiC. These nano-voids acted as sites for metal impurities to agglomerate and helped to improve the electronic properties of the bonding interfaces through impurity gettering.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Kang Cheng, Luc C. J. Smulders, Lars van der Wal, Jogchum Oenema, Johannes D. Meeldijk, Nienke L. Visser, Glenn Sunley, Tegan Roberts, Zhuoran Xu, Eric Doskocil, Hideto Yoshida, Yanping Zheng, Jovana Zecevic, Petra E. de Jongh, Krijn P. de Jong
Summary: By rational arrangement of functional sites, the minimum loading of platinum can be reduced, enhancing the performance of catalysts. Deposition of trace amounts of platinum nanoparticles on the alumina binder or the outer surface of zeolite crystals increases selectivity and preserves the metal and acid functions.
Article
Chemistry, Physical
Takashi Nakamura, Kento Ohta, Xueyan Hou, Yuta Kimura, Kazuki Tsuruta, Yusuke Tamenori, Ryotaro Aso, Hideto Yoshida, Koji Amezawa
Summary: Anion doping is a promising approach to improving battery performance by utilizing anion defects. By quantitatively controlling the oxygen vacancy concentration in Li1.2Ni0.13Co0.13Mn0.54O2-delta, it was found that oxygen vacancies can cause crystal lattice expansion and selective reduction of Ni and Co, resulting in better energy density retention and mitigation of voltage decay in the cathode material. These findings demonstrate the effectiveness of oxygen defect engineering for oxide-based battery materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Physics, Applied
Yutaka Ohno, Takehiro Tamaoka, Hideto Yoshida, Yasuo Shimizu, Kentaro Kutsukake, Yasuyoshi Nagai, Noritaka Usami
Summary: Research shows that non-coherent sigma 3{111} grain boundaries with a positive tilt angle deviation exhibit high recombination activity in high-performance multicrystalline silicon ingots. The presence of edge-type dislocations with a specific Burgers vector arrangement, along with stretched 110 reconstructed bonds to prevent dangling bonds, leads to the generation of large strains around dislocation cores. This strain-induced segregation of oxygen and carbon atoms is believed to be the main cause of the recombination activity.
APPLIED PHYSICS EXPRESS
(2021)
Article
Crystallography
Yutaka Ohno, Yuta Kubouchi, Hideto Yoshida, Toshio Kochiya, Tomio Kajigaya
Article
Chemistry, Multidisciplinary
Guozhu Zhang, Chen Wang, Wataru Mizukami, Takuro Hosomi, Kazuki Nagashima, Hideto Yoshida, Kentaro Nakamura, Tsunaki Takahashi, Masaki Kanai, Takao Yasui, Yuriko Aoki, Yoshinobu Baba, Takeshi Yanagida
Article
Microscopy
Shengli Zhang, Ying Wang, Bowei Wang, Yi Zeng, Jiani Li, Xingyue Wang, Cuihua Hu, Zhankun Weng, Zuobin Wang
Summary: Curcumin was found to have effects on the activity, migration, and mitochondrial membrane potential of malignant hepatocytes and their mitochondria. The findings from both optical microscopy and atomic force microscopy studies confirm these effects on cell morphology and biomechanics.
Article
Microscopy
Rutika Sansaria, Krishanu Dey Das, Alwin Poulose
Summary: This paper presents a method for quantifying Golgi dispersion images and classifying them using machine learning models. By applying automated image processing and segmentation, extracting features, and using different classifiers, accurate classification of Golgi images is achieved.
Article
Microscopy
Marjorie da Silva, Cintia Eleonora Lopes Justino, Fernando Henrique Carnimeo, Fernando Barbosa Noll, Johan Billen
Summary: This article describes the secretory glands in females of two species of Myzinum and discusses their homology with other glands in the Hymenoptera order. The study finds that the three glands, instead of the commonly believed two, are present in Myzinum species. However, the limited research on the structure, function, and evolution of female accessory glands in Hymenoptera prevents conclusive statements.
Article
Microscopy
Ping Hao, Wen Yin, Xi Chen, Shuangshuang Qin, Yue Yu, Yuan Yuan, Xiaoyu Quan, Bing Hu, Shouhai Chen, Yi Wu
Summary: This study confirmed the secretion of nano-scale exosomes-multivesicular bodies and the interaction of high endothelial cells (HECs) with lysosomes and mitochondria in the small intestine of laying birds. Immunohistochemistry and immunofluorescence results showed the strong immunoreactivity of exosome-related proteins and autophagic-related proteins in the lamina propria of the small intestine. These findings reveal an innovative communication method among HECs in the small intestine.
Article
Microscopy
Stefan Talu, Robert S. Matos, Henrique Duarte da Fonseca Filho, Daniela Predoi, Simona Liliana Iconaru, Carmen Steluta Ciobanu, Liliana Ghegoiu
Summary: This study developed composite layers based on magnesium-doped hydroxyapatite and chitosan, and demonstrated their good biocompatibility and antifungal effects against osteosarcoma cells. The attachment and growth of the cells on the composite layers were promoted, while the growth of Candida albicans was inhibited. The morphological analysis revealed complex 3D patterns on the cancer cell surfaces on the magnesium-containing composite layers.
