Article
Multidisciplinary Sciences
Cong He, Zhiqiao Li, Houwen Chen, Nick Wilson, Jian-Feng Nie
Summary: The authors report an unusual solute segregation phenomenon in a group of Mg alloys driven by chemical bonding, where solute atoms larger than Mg segregate to compression sites of specific fully coherent twin boundary.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Chaoqiang Liu, Zongyu Xie, Lin Qi, Houwen Chen, Min Song
Summary: In this study, aberration-corrected scanning transmission electron microscope was used to characterize alpha-alpha precipitates boundaries. The formation mechanism of (10 (1) over bar1)(α) and (10 (1) over bar3)(α) coherent twin boundaries (CTBs) was reported, along with the resulting lattice distortion and introduced dislocations.
Article
Nanoscience & Nanotechnology
Zhiqiao Li, Houwen Chen, Jian-Feng Nie
Summary: In this work, the migrations of (1011) and (1013) coherent twin boundaries (CTB) in pure magnesium are studied using first-principles methods. The process of migration is divided into nucleation and gliding of twinning disconnection (TD), with TD nucleation approximated by rigid-shifting of CTB. Energetic maps obtained from this analysis reveal the necessity of applying shear strains simultaneously along the twinning direction η1 and along k1, which is normal to η1, to activate the migration of 2-layer CTB in these two different twinning modes. The energetic map identifies the most efficient external shear strain direction for initiating CTB migration, which lies between the Burgers vectors bTD-2 of the 2-layer-height TD and η1. The shear strain required to initiate TD gliding is smaller than that needed for TD nucleation, implying that the migrations of (1011) and (1013) CTBs are primarily governed by the TD nucleation.
SCRIPTA MATERIALIA
(2023)
Article
Materials Science, Multidisciplinary
Guangya Li, Yang Yang, Boyuan Gou, Jinyu Zhang, Jiao Li, Yaqiang Wang, Lingfei Cao, Gang Liu, Xiangdong Ding, Jun Sun
Summary: By controlling the defects of coherent twin boundaries (CTBs) through Cr segregation at kinks and grain boundaries (GBs), high strength and excellent structural-mechanical stability can be achieved, providing a new perspective for the design of purified Cu alloys.
Article
Engineering, Mechanical
Xiaoxian Zhang, Fionn P. E. Dunne
Summary: Short crack propagation near a coherent twin boundary in polycrystal nickel alloy is investigated using 3D crystal plasticity extended finite element modelling (CP-XFEM), with experimentally characterised microstructures and crack path observations. The results show that short 3D cracks at coherent twin boundaries grow on parallel (111) slip planes at a very high rate, serving as an intrinsic part of the nucleation process. This is mainly due to the stress states established by twin/parent constraint driven by local elastic anisotropy. Elastic isotropy modelling leads to non-planar and inclined crack growth towards the twin boundary, and the twist angle between the twin and parent phase influences the local stress state, crack morphology, and growth rate deviation from 60 degrees.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Jann-Erik Brandenburg, Luis A. Barrales-Mora, Sadahiro Tsurekawa, Dmitri A. Molodov
Summary: The migration behavior of grain boundaries with misorientations close to the & sigma;3 CSL orientation relationship in high purity Al bicrystals was investigated. It was found that the ability of some boundaries to move under capillary driving force depends on the initial boundary inclination. The measured migration activation enthalpy for one specific boundary was found to be the lowest among previous experiments in Al bicrystals of the same purity.
Article
Chemistry, Multidisciplinary
Hong-Kai Liu, Yong-Li Ma, Li-Jun Ren, Christian Kuebel, Wei Wang
Summary: Heteroclusters formed by tethering dissimilar nanoclusters using organic linkers, resembling lipids and self-assembling into cubosomes, were studied for their unique nanochannel lattice structure and internal crystal porous structure characterized using transmission electron microscopy. Clear distinctions in conformation of skeletal units between normal and twin boundary units were observed, leading to changes in channel direction and slight elongation at the twin boundary while maintaining overall topology. The study concluded that the two distinct channel systems within cubosomes with different twin boundaries remain continuous, indicating potential for the development of soft crystals with defined shapes and special nanostructures for advanced applications.
Article
Materials Science, Multidisciplinary
Peng Wang, Fei Xu, Yiding Wang, Jun Song, Cheng Chen
Summary: This study investigates the interplay of super-screw dislocations and coherent twin boundary (CTB) in Ni3Al using molecular dynamics simulations and dislocation continuum theory. Various interaction mechanisms are observed depending on the stress and dislocation gliding pathways. A continuum model framework is developed to evaluate the critical shear stress required for CTB to accommodate dislocations along different pathways, considering the effects of anti-phase boundary (APB) and Complex Stacking Fault (CSF). The study suggests that the resistant force of CTB against all gliding dislocations is a more appropriate metric for quantifying its strength.
MECHANICS OF MATERIALS
(2024)
Article
Chemistry, Multidisciplinary
Deping Huang, Yinwu Duan, Leining Zhang, Xin li, Yongna Zhang, Feng Ding, Jing Guo, Xiaoxu Huang, Zhancheng Li, Haofei Shi
Summary: This article investigates the effects of twin boundaries on graphene growth. The results show that after crossing twin boundaries, graphene islands experience different compressive strains but do not form linear defects. Additionally, the formation of graphene doping can be manipulated with the type and location of twin boundaries.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Wandong Xing, Yang Zhang, Jizhe Cui, Shiyou Liang, Fanyan Meng, Jing Zhu, Rong Yu
Summary: In this study, it was discovered that the twinning plane of rock-salt-type CoO is the (112) plane, which was unexpected given its proximity to Ni in the periodic table. Through various techniques, the atomic and electronic structures of the CoO(112) twin boundary were investigated, revealing a specific pattern and greater stability compared to the (111) twin boundary.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Li Li, Lijun Liu, Yoji Shibutani
Summary: The atomistic interactions between screw dislocations and coherent twin boundaries in face-centered metals were investigated using molecular dynamics and nudged elastic band method. The interaction mechanism was found to be influenced by the stacking fault energies predicted by different potentials. The critical interaction stress and energy barrier decreased as the reciprocal of the difference between unstable and stable stacking fault energies increased.
MATERIALS TRANSACTIONS
(2022)
Article
Materials Science, Multidisciplinary
Huhu Su, Xinzhe Zhou, Shijian Zheng, Hengqiang Ye, Zhiqing Yang
Summary: The study investigated the reactions between basal dislocations and CTBs in a Mg alloy, showing that these reactions can facilitate TB migration and change the grain boundary structure. The loss of local coherency induced by dislocation-TB reactions does not inherently impede TB migration, providing a new strategy to improve the ductility of Mg alloys.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Ke Ran, Juri Barthel, Lei Jin, Daesung Park, Annika Buchheit, Kerstin Neuhaus, Stefan Baumann, Wilhelm A. Meulenberg, Joachim Mayer
Summary: With the help of advanced transmission electron microscopy, the researchers have investigated the structure of the (110)-type twin boundary in Ce-doped GdFeO3 (C-GFO) with picometer precision. They have found that the Gd off-centering at the twin boundary is highly localized and can reach up to 30 pm. Furthermore, the analysis using electron energy loss spectroscopy has revealed the presence of oxygen vacancies, self-balanced behavior of Ce, and mixed occupation of Fe2+ and Fe3+ at the twin boundary. This study provides valuable atomic-level information about the twin boundary in C-GFO, which is crucial for further exploration of grain boundary engineering.
Article
Chemistry, Multidisciplinary
Yingbin Chen, Qishan Huang, Shuchun Zhao, Haofei Zhou, Jiangwei Wang
Summary: This study demonstrates the deformation behavior of penta-twinned nanomaterials under high shear stress, showing structural destruction and core reconstruction of the penta-twins. The intrinsic deformation behaviors enable the possibility of controlling the morphology of penta-twinned nanomaterials with unique properties.
Article
Chemistry, Multidisciplinary
H. Nguyen, R. Silverstein, A. Zaveri, W. Cui, P. Kurzhals, S. Sicolo, M. Bianchini, K. Seidel, R. J. Clement
Summary: It has been found that planar defects in the Li1-yNi1+yO2 cathode can significantly affect its electrochemical performance, particularly causing irreversible capacity during the first discharge cycle. Advanced structure probes have been used to identify and quantify point and planar defects in the synthesized cathode, and a characteristic Li-7 NMR signature near twin boundaries has been identified. These findings provide new guidelines for designing more efficient Li1-yNi1+yO2 cathodes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Applied
Yu Ren Zhou, Surya Effendy, Juner Zhu, Michael T. Petr, Colin D. Cwalina, Martin Z. Bazant, Bilge Yildiz, Ju Li, Michael P. Short
Summary: Water-based anti-corrosion coatings, as environmentally-friendly alternatives to solvent-based coatings, have limitations in challenging corrosion environments. This study investigates the coupled effects of water absorption and ion transport in hydrated latex films and proposes mechanisms to explain these effects. The findings of this study provide useful insights for designing high-corrosion resistance water-based coatings.
JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH
(2023)
Article
Multidisciplinary Sciences
Yuhao Qiang, Abdoulaye Sissoko, Zixiang L. Liu, Ting Dong, Fuyin Zheng, Fang Kong, John M. Higgins, George E. Karniadakis, Pierre A. Buffet, Subra Suresh, Ming Dao
Summary: This article introduces the clearance of altered red blood cells by the spleen and the mechanisms underlying these processes. By studying sickle cell disease, it is found that the retention and adhesion of red blood cells are faster in blood samples from patients with sickle cell disease compared to healthy individuals. Additionally, under hypoxic conditions, the phagocytosis process of sickled red blood cells is different from non-sickled red blood cells. It is also observed that reoxygenation significantly alleviates RBC retention and leads to rapid unsickling of ingested sickled red blood cells. These findings provide insights into the maintenance of homeostatic balance in the spleen and the potential clinical manifestations in hematologic diseases.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Engineering, Mechanical
Yongchao Chen, Qing-Jie Li, Alexander D. O'Brien, Yang Yang, Qi He, David A. Bloore, Joost J. Vlassak, Ju Li
Summary: Ion beam plays a crucial role in ion implantation and nanostructure fabrication. However, the quantitative model for describing the residual stresses induced by ion-beam radiation is lacking. In this study, molecular dynamics simulations are used to demonstrate that the material response to irradiation is generally anisotropic and should be described using tensorial quantities. We show that accelerator-based ion beam irradiation, combined with intrinsic and externally induced anisotropy, causes shear transformation strains in addition to hydrostatic expansion, and we propose that this tensorial response model should be considered for accurate nanoscale fabrication using ion-beam irradiation.
EXTREME MECHANICS LETTERS
(2023)
Article
Chemistry, Physical
So Takamoto, Daisuke Okanohara, Qing-Jie Li, Ju Li
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Multidisciplinary
Huanhuan Tian, Ju Li, Martin Z. Bazant
Summary: Ion concentration polarization (CP) has been extensively studied in single-phase mixed conductors, but not in multiphase systems. In our recent publication, we proposed and demonstrated the phenomenon of multiphase polarization (MP) in ion-intercalation nanofilms. We also showed that MP can lead to nonvolatile interfacial resistive switching (RS) and improved switching performance. A comprehensive 2D phase-field model was developed to study ion-electron transport in ion-intercalation materials, and the model was used to analyze the time evolution and switching characteristics of MP.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Thi Xuyen Nguyen, Jagabandhu Patra, Chia-Chien Tsai, Wen-Ye Xuan, Hsin-Yi Tiffany Chen, Matthew S. S. Dyer, Oliver Clemens, Ju Li, Subhasish Basu Majumder, Jeng-Kuei Chang, Jyh-Ming Ting
Summary: High entropy oxide (HEO) is a new type of anode material for Li-ion batteries that allows for customized charge-discharge properties. However, the impact of a secondary phase has been overlooked. In this study, two types of Co-free HEOs were prepared, one with a plain cubic structure and the other with an additional tetragonal spinel oxide phase. It was found that the secondary phase improved the redox kinetics and reversibility of the electrodes. The cycling stability of the electrodes was also validated using density functional theory calculations. This study demonstrates for the first time the enhanced rate capability and cyclability of HEO electrodes induced by a secondary phase.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jaekyung Sung, So Yeon Kim, Avetik Harutyunyan, Maedeh Amirmaleki, Yoonkwang Lee, Yeonguk Son, Ju Li
Summary: All-solid-state batteries with metallic lithium (Li-BCC) anode and solid electrolyte (SE) are facing challenges due to the unstable SE/Li-BCC interface. This study demonstrates the use of an ultra-thin nanoporous mixed ionic and electronic conductor (MIEC) interlayer to regulate Li-BCC deposition and stripping and improve the stability of the interface. The full-cell with this design shows high specific capacity, initial Coulombic efficiency, capacity retention, and rate capability.
ADVANCED MATERIALS
(2023)
Article
Multidisciplinary Sciences
Jiadong Yu, Ju Li, Shang Zhang, Fan Wei, Yanjun Liu, Jinhui Li
Summary: This study utilizes the waste metal current collectors in spent lithium-ion batteries to promote atom economy and reduce chemical consumption. Through mechanochemical activation, efficient oxidation of current collector fragments and moderate valence reduction of metal oxides are achieved. The regenerated cathode material demonstrates excellent electrochemical performance and improved environmental impact.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Yang Yang, Weiyue Zhou, Sheng Yin, Sarah Y. Wang, Qin Yu, Matthew J. Olszta, Ya-Qian Zhang, Steven E. Zeltmann, Mingda Li, Miaomiao Jin, Daniel K. Schreiber, Jim Ciston, M. C. Scott, John R. Scully, Robert O. Ritchie, Mark Asta, Ju Li, Michael P. Short, Andrew M. Minor
Summary: Corrosion is a common failure mode in materials. The authors report a percolating 1D wormhole corrosion morphology using advanced electron microscopy and theoretical simulations. The work presents a vacancy mapping method with nm-resolution, identifying the incubation sites of the wormholes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yaoshen Niu, Zilin Hu, Bo Zhang, Dongdong Xiao, Huican Mao, Lin Zhou, Feixiang Ding, Yuan Liu, Yang Yang, Juping Xu, Wen Yin, Nian Zhang, Zhiwei Li, Xiqian Yu, Hao Hu, Yaxiang Lu, Xiaohui Rong, Ju Li, Yong-Sheng Hu
Summary: This study successfully utilizes Mg2+ to activate the oxygen redox reaction in abundant Fe/Mn-based layered cathodes, achieving reversible anionic and cationic redox capacities. This leads to lower cost, higher energy density, and improved cycling performance of Na-ion batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shihe Wang, Ganxiong Liu, Wang Wan, Xueyang Li, Ju Li, Chao Wang
Summary: This study demonstrates the use of a deep eutectic co-solvent to reconstruct the hydrogen bonds in the electrolyte of aqueous Zn-ion batteries, effectively suppressing reactivity and improving stability and electrochemical performance.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Clarita Regalado Y. Vera, Hanping Ding, Jagoda Urban-Klaehn, Meng Li, Zeyu Zhao, Frederick Stewart, Hanchen Tian, Xingbo Liu, Yanhao Dong, Ju Li, Meng Zhou, Hongmei Luo, Dong Ding
Summary: The influence of different dopants on the hydration ability of materials is not fully understood. This study reveals the effects of proton trapping and detrapping on material hydration and dehydration, which is important for understanding the hydration ability of proton-conducting oxides.
CHEMISTRY OF MATERIALS
(2023)
Article
Multidisciplinary Sciences
Yu Xie, Xihong Lin, Ju Li, Qian He, Junming Huang
Summary: The US global leadership in science and technology, particularly in the field of immigrants from China, is facing challenges due to the increased pressure from the China Initiative. The return migration of scientists of Chinese descent from the United States to China is on the rise, and many scientists are considering leaving the US or stopping federal grant applications due to fear and anxiety. This could result in a loss of scientific talent from the United States to China and other countries.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Multidisciplinary Sciences
Guoqing Wang, Changhao Li, Hao Tang, Boning Li, Francesca Madonini, Faisal F. Alsallom, Won Kyu Calvin Sun, Pai Peng, Federica Villa, Ju Li, Paola Cappellaro
Summary: Solid-state defects are attractive platforms for quantum sensing and simulation, but changes in density usually result in changes in spin. This study successfully controls the spin concentration while keeping fixed decoherence effects by exploiting charge transport, and characterizes the charge redistribution process using a wide-field imaging system.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Chemistry, Multidisciplinary
Zhen Zhang, Dawei Xi, Zhichu Ren, Ju Li
Summary: Carbon efficiency is a pressing issue in the electroreduction of carbon dioxide. Existing electrolyzer systems suffer from low carbon efficiency. This study identifies the root causes of low carbon efficiency and proposes a solution using a near-neutral-pH cation exchange membrane, a glass fiber intermediate layer, and carbon dioxide partial pressure management. The proposed system achieves a carbon efficiency of over 96% by converting concentrated bicarbonate solution into solid formate fuel.
CELL REPORTS PHYSICAL SCIENCE
(2023)
