Article
Chemistry, Physical
Joao Paulo de Campos da Costa, Vinicius Teodoro, Marcelo Assis, Jefferson Bettini, Juan Andres, Joao Paulo Pereira do Carmo, Elson Longo
Summary: The paper presents a progress in the development of a scalable electron beam irradiation platform for obtaining innovative materials for technological and industrial applications. Carbon allotropic transformation can be achieved through portable EBI, resulting in nanomaterials with excellent properties.
Article
Chemistry, Multidisciplinary
Kevin M. Roccapriore, Shin-Hum Cho, Andrew R. Lupini, Delia J. Milliron, Sergei Kalinin
Summary: The spatial confinement of matter in functional nanostructures has positioned them at the forefront of nanoscience, serving as playgrounds for exotic physics and quantum phenomena as well as finding applications in various fields. Through modern synthesis processes and precise sculpting, the plasmonic response of nanoparticles can be effectively modified, offering a wide range of possibilities for nanophotonic design.
Article
Chemistry, Physical
Ali Yadegari, Uwe Gohs, Hossein-Ali Khonakdar, Udo Wagenknecht
Summary: The prevalence of oxidation reactions in microporous polyethylene membranes under different treatments was investigated. It was found that treatment under vacuum or nitrogen gas can effectively reduce oxidation reactions and improve thermal stability. DSC analysis showed that crystallization reactions are more affected than melting reactions.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Lixun Cheng, Yaoling Shen, Pengfei Nan, Chuanqiang Wu, Yilin Tai, Xiaonan Luo, Yongsheng Zhang, Binghui Ge
Summary: In this study, the microstructure evolution of Na2Ti3O7 anode material was observed at the atomic scale using advanced electron microscopy techniques. Anisotropic amorphization was successfully observed, and a phase transition pathway involving a new phase, Na2Ti24O49, was proposed. It was also found that the amorphization is influenced by surface energy and electron dose rate.
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, Physical
Yuting Shen, Hailin Yu, Tao Xu, Qiubo Zhang, Kuibo Yin, Shan Cong, Yushen Liu, Litao Sun
Summary: Two types of edge structures, semiconducting flat edges and metallic zigzag edges, are found in single-layer Bi2Te3, and the proportions of these edges can be controlled by electron beam irradiation.
Article
Materials Science, Multidisciplinary
X. L. Lu, J. Wang, Q. Y. Huang, J. S. Chen, B. Z. Sun
Summary: This study investigates a phase transition from ss S' to ss 1 in a Mg-Y-Ce alloy caused by electron beam irradiation through atomic scale scanning transmission electron microscopy. It is found that the structural evolution from ss S' to ss 1 precipitates can be completed within two minutes for a nanosized particle, mainly due to the increased heat and vacancy concentration generated by the electron beam irradiation accelerating atomic diffusion, particularly along the c-axis direction.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Sung Bo Lee, Seung Jo Yoo, Jinwook Jung, Heung Nam Han
Summary: This study used electron-beam irradiation to observe surface structural transitions on thin Au (1 0 0) and (1 1 0) specimens at different current densities. It was found that at low current densities, nanometer polygonal holes were formed with atomically sharp facets on both surfaces, while at higher current densities, the holes became filled and some facet surfaces were roughened.
Article
Chemistry, Multidisciplinary
Jong Hyeok Seo, Ji-Hwan Kwon
Summary: In this study, the electronic structure of Co(OH)2 was investigated using low current electron energy loss spectroscopy. The results showed that electron beam irradiation caused a transformation in the electronic structure of Co(OH)2 and led to the formation of Co3O4.
Article
Chemistry, Multidisciplinary
Xu Zhang, Xiang Zhang, Pulickel M. Ajayan, Jianguo Wen, Horacio D. Espinosa
Summary: The annihilation of vacancy clusters in monolayer molybdenum diselenide (MoSe2) under electron beam irradiation is achieved by diffusion of vacancies towards the free edge. It is shown that electron beam irradiation and pre-stress in the suspended MoSe2 monolayer are necessary for vacancies to overcome energy barriers for diffusion. This new mechanism of vacancy healing in 2D materials expands the capability of electron beam in defect engineering and tuning the properties of 2D materials for applications.
Article
Materials Science, Multidisciplinary
Sung Bo Lee, Sung-Gyu Kang, Jinwook Jung, Simoon Sung, Seung Jo Yoo, Heung Nam Han
Summary: The structural evolution of Au nanoparticles on amorphous carbon under electron-beam irradiation was investigated using in situ high-resolution transmission electron microscopy. Some nanoparticles experienced lattice shear and fluctuation, while others rotated. These phenomena were related to electron-beam-induced heating and momentum transfer.
Article
Food Science & Technology
Qi Zheng, Zhijun Chen, Weiqiang Yan, Haihong Wang, Wenhui Tian, Dongsheng Feng, Ling Yue, Wenyuan Qi, Xiaohua He, Qiulian Kong
Summary: Electron beam irradiation is an efficient technique for cold sterilization in food preservation. This study investigated the biological and morphological changes in Staphylococcus aureus induced by electron beam irradiation, and found that electron beam prolongs the lag phase of bacterial growth and affects protein expression. These findings provide valuable insights into the effects of electron beam irradiation on food pathogens.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Sung-Dae Kim, Young-Woon Kim
Summary: Real-time observation and experimental confirmation were conducted in this study to investigate the structural changes and spinel block formation in Na-beta ''-alumina, which are associated with the conduction of Na+ ions.
Article
Nanoscience & Nanotechnology
Sung Bo Lee, Seung Jo Yoo, Jinwook Jung, Heung Nam Han
Summary: The irradiation of high-energy particles can affect the grain-boundary structure of polycrystalline nuclear materials, with different reactions observed for different grain-boundary characteristics. By examining different types of grain boundaries in a model system, it was found that tilt boundaries became roughened while twist boundaries became faceted under the same irradiation conditions.
SCRIPTA MATERIALIA
(2021)
Article
Chemistry, Multidisciplinary
Matthew G. Boebinger, Courtney Brea, Li-Ping Ding, Sudhajit Misra, Olugbenga Olunloyo, Yiling Yu, Kai Xiao, Andrew R. Lupini, Feng Ding, Guoxiang Hu, Panchapakesan Ganesh, Stephen Jesse, Raymond R. Unocic
Summary: An automated and feedback-controlled atomic fabrication method is developed to create 1D-2D heterostructures in MoS2 with atomic precision. The shape and symmetry of the scanning pathway can be controlled using an aberration-corrected scanning transmission electron microscope. Density functional theory calculations and ab initio molecular dynamic simulations are used to study the energetic barriers for atomic edge structures and transformation pathways. This work provides an automated method for understanding atomic-scale transformations and enables more precise atomic-scale engineering of materials.
ADVANCED MATERIALS
(2023)
Article
Biophysics
Daichi Fukushima, Ugir Hossain Sk, Yasuhiro Sakamoto, Ikuhiko Nakase, Chie Kojima
COLLOIDS AND SURFACES B-BIOINTERFACES
(2015)
Article
Materials Science, Multidisciplinary
Satoshi Semboshi, Yasuhiro Sakamoto, Hiroyuki Inoue, Akihiro Iwase, Naoya Masahashi
JOURNAL OF MATERIALS RESEARCH
(2015)
Article
Multidisciplinary Sciences
Cuiling Li, Oemer Dag, Thang Duy Dao, Tadaaki Nagao, Yasuhiro Sakamoto, Tatsuo Kimura, Osamu Terasaki, Yusuke Yamauchi
NATURE COMMUNICATIONS
(2015)
Article
Chemistry, Multidisciplinary
Yoshiyuki Kuroda, Yosuke Shimbo, Yasuhiro Sakamoto, Hiroaki Wada, Kazuyuki Kuroda
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2016)
Article
Physics, Multidisciplinary
Pham Tan Thi, Takehito Nakano, Yasuhiro Sakamoto, Yasuo Nozue
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
(2016)
Article
Chemistry, Applied
Yuichiro Hirota, Mayuka Yamada, Yoshiaki Uchida, Yasuhiro Sakamoto, Toshiyuki Yokoi, Norikazu Nishiyama
MICROPOROUS AND MESOPOROUS MATERIALS
(2016)
Article
Physics, Applied
Yi-Tao Cui, Sven Tougaard, Hiroshi Oji, Jin-Young Son, Yasuhiro Sakamoto, Takuya Matsumoto, Anli Yang, Osami Sakata, Huaping Song, Ichiro Hirosawa
JOURNAL OF APPLIED PHYSICS
(2017)
Article
Physics, Condensed Matter
Yasuhiro Sakamoto
JOURNAL OF PHYSICS-CONDENSED MATTER
(2017)
Article
Chemistry, Multidisciplinary
Misaki Ota, Yuichiro Hirota, Yoshiaki Uchida, Yasuhiro Sakamoto, Norikazu Nishiyama
Article
Chemistry, Multidisciplinary
Kazuchika Ozawa, Yusuke Tanabe, Tetsuya Kodaira, Takao Sekiya
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2019)
Article
Chemistry, Applied
Tetsuya Kodaira, Takuji Ikeda, Chikako Sekiguchi, Kyoko K. Bando, Koji Nishi
Summary: Soaking GaPO4-LTA crystals in water can transform them into an amorphous phase with the same cubic morphology. The resulting am-GaPO particles incorporate water molecules and have a small surface area mainly on the particle surface.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Keito Sawahara, Shinji Tanaka, Tetsuya Kodaira, Ryoichi Kanega, Hajime Kawanami
Summary: Hydrogen plays a critical role in achieving net zero emissions and global environment sustainability as an alternative fuel. In this study, an iridium-immobilized catalyst based on polyethyleneimine (PEI) was developed for continuous hydrogen production via formic acid dehydrogenation (FADH), showing excellent catalytic activity and durability. The obtained hydrogen gas was evaluated for power generation using a standard fuel cell and achieved stable power generation for 5 hours.
Article
Chemistry, Physical
Nobuya Suganuma, I. Tyrone Ghampson, Hiroki Miura, Junichi Murakami, Kyoko K. Bando, Tetsuya Kodaira, Tatsuya Yamasaki, Atsushi Takagaki, Tatsumi Ishihara, Tetsuya Shishido
Summary: Platinum nanoparticles supported on various metal oxides were investigated for the catalytic activation of methane with nitric oxide at low temperatures and atmospheric pressure. The presence of hydrogen cyanide (HCN) was detected only on the (theta + gamma)-Al2O3-supported Pt catalyst. The difference in catalytic behavior for C-N coupling was found to be related to the relative concentrations of adsorbed CHx and NO species.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Risheng Li, Tetsuya Kodaira, Hajime Kawanami
Summary: In this study, a newly developed in situ/operando UV-vis-diffuse-reflectance spectroscopy system was used to continuously monitor catalytic formic acid dehydrogenation. By applying a simple method on the generated gas concentration in the center of a round cell through high-speed stirring, reliable spectra with a high S/N ratio were obtained without any mechanical errors from gas meters.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Yasuhiro Sakamoto, Haishuang Zhao, Hermann Gies, Katsutoshi Yamamoto, Ute Kolb, Takuji Ikeda
DALTON TRANSACTIONS
(2020)
Article
Instruments & Instrumentation
Taisei Hayashi, Kensei Ichiba, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Cr-doped Mg4Ta2O9 single crystals with different doping levels were synthesized using the floating zone method, and their photoluminescence and scintillation properties were evaluated. The results showed that Cr-doped Mg4Ta2O9 single crystals exhibited broad emission bands in the near-infrared region and showed scintillation characteristics within specific wavelength ranges. Additionally, the samples with different Cr doping levels demonstrated different lower detection limits based on the dose rate response function.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. Marouf, A. C. Chami, Y. Boudouma
Summary: This study develops a Monte Carlo simulation approach to describe proton-induced secondary electron emission in solids. Theoretical modeling based on the Mott's elastic scattering cross-section and Lindhard's dielectric function was used to calculate the double differential cross-section (DDCS) of excited electrons and describe electron transport in the medium. The results for aluminum show the angular and energy distributions of backscattered electrons for incident protons with energy below 25 keV at normal incidence, and the total electron emission yield also agrees well with available measurements.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Weipeng Yan, Baojun Duan, Zijian Zhu, Yan Song, Guzhou Song, Jiming Ma, Binkang Li, Yucheng Liu
Summary: This article reports on the scintillation performance of Lithium-doped 2D (PEA)2PbBr4 perovskite single crystals synthesized at room temperature. The crystals exhibit fast decay time, high light yield, and high spatial resolution, making them highly promising for medical diagnostic applications.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
S. B. Vishwakarma, S. K. Dubey, R. L. Dubey, I. Sulania, D. Kanjilal
Summary: Investigations have been conducted on the implanted SiO2 thin film after thermal annealing using various analytical techniques. The results revealed the absence of vacancy defects, variations in vibrational modes and the formation of new structures. The photoluminescence intensity of the annealed SiO2 samples was higher, with a decrease in non-radiative defect centers and an increase in radiative Si:SiO2 interface states. Additionally, the presence of silicon nanoclusters formed after annealing resulted in an additional radiative recombination peak. Furthermore, the formation of new SiOx structures was observed after thermal annealing.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
M. Koshimizu, S. Kurashima, A. Kimura, M. Taguchi
Summary: By observing the scintillation time profiles of CeF3 under irradiations of pulsed beams with different LETs, we found that the initial decay was faster for higher LET, which is consistent with previous studies on other self-activated scintillators. This faster decay at higher LET can be explained by the competition between the scintillation caused by 5d-4f transition of Ce3+ ions and quenching due to the interaction between excited Ce3+ ions close to each other.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Junjie Shi, Jianhong Hao, Fang Zhang, Qiang Zhao, Bixi Xue, Jieqing Fan, Zhiwei Dong
Summary: This study examined the neutralization process and beam quality of a hydrogen beam by emitting negative hydrogen ions to a hydrogen target. The findings showed that the neutralization efficiency was influenced by variables such as the transport distance, energy, and target gas density. However, the maximal neutralization efficiency was not affected by the density of the target gas or the energy of the negative hydrogen ions.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
