Article
Materials Science, Multidisciplinary
Yizhong Guo, Jiao Teng, Guo Yang, Ang Li, Yao Deng, Chengpeng Yang, Lihua Wang, Xin Yan, Ze Zhang, Xiaoyan Li, En Ma, Xiaodong Han
Summary: Detailed monitoring of atomic-scale processes is crucial for understanding grain rotation in nanocrystalline metals. In this study, in situ atomic-resolution evidence reveals that the type of grain boundary plays a role in the atomic processes involved in grain rotation in nanocrystalline Pt. General GBs exhibit a combination of dislocation activities and atomic rearrangements, while tilt GBs mostly rely on dislocation activities. GB dislocation climb, glide, and reaction are often associated with Lomer-like dislocation formation and destruction.
Article
Materials Science, Multidisciplinary
Kartik Venkatraman, Jordan A. Hachtel, Miaofang Chi
Summary: In the recent work of Kohno et al., magnetic spin orientation changes were measured at the atomic scale for the first time using the differential phase contrast technique in scanning transmission electron microscopy with a novel magnetic-field-free objective lens system.
Article
Materials Science, Multidisciplinary
Marion Borde, Michel Freyss, Emeric Bourasseau, Bruno Michel, David Rodney, Jonathan Amodeo
Summary: In this study, the core structure and mobility of the 12 (110){001} edge dislocation in UO2 were investigated using atomistic simulations and ab initio calculations. A new dislocation core structure, called "zigzag," was discovered to be prevalent at high temperatures. The velocity of the dislocation was determined through simulations, and a dislocation mobility law was adjusted for the multi-scale modeling of UO2 nuclear fuel mechanical properties.
JOURNAL OF NUCLEAR MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Di Qiu, Pengyang Zhao, Dallas R. Trinkle, Yunzhi Wang
Summary: The study predicts the effect of stress on the dislocation core structure using a microscopic phase-field model with subatomic resolution, revealing non-Schmid behavior and significant impact on the Peierls stress.
MATERIALS RESEARCH LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Takahiko Ikarashi, Kyosuke Nakayama, Naoki Nakajima, Kazuki Miyata, Keisuke Miyazawa, Takeshi Fukuma
Summary: In this study, the three-dimensional adsorption structures of anti-freezing surfactants on sapphire surfaces were directly visualized using 3D scanning force microscopy. The observed adsorption configurations at different concentrations provide important insights into the anti-freezing mechanism.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Christopher Delre, Yufeng Jiang, Philjun Kang, Junpyo Kwon, Aaron Hall, Ivan Jayapurna, Zhiyuan Ruan, Le Ma, Kyle Zolkin, Tim Li, Corinne D. Scown, Robert O. Ritchie, Thomas P. Russell, Ting Xu
Summary: Using inspiration from origami, rigid-walled deployable structures that are multistable and inflatable have been designed. A library of bistable origami shapes created and then combined to build meter-scale functional structures.
Article
Multidisciplinary Sciences
David Melancon, Benjamin Gorissen, Carlos J. Garcia-Mora, Chuck Hoberman, Katia Bertoldi
Summary: This passage discusses the design of large-scale structures with deployability, presenting two main strategies historically used and their limitations. Drawing inspiration from the Japanese art of paper folding, a novel design approach is proposed to construct large-scale inflatable systems that can lock in place after deployment.
Article
Engineering, Mechanical
Can Cui, Xiaoguo Gong, Lijia Chen, Weiwei Xu, Lijie Chen
Summary: The interaction between dislocations and precipitates is crucial in the strengthening mechanisms of Ni-based superalloys, while voids as unavoidable defects can significantly affect the mechanical performances of materials. The strength improvement mainly comes from the formation of misfit networks, stair-rod dislocations, and Frank dislocations, revealing atomic-scale details of experimentally observed dislocation-precipitate interaction mechanisms. Additionally, the computational results suggest that voids can weaken the resistance of precipitates to dislocation slip, thus reducing the mechanical strength.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Nilgoon Irani, Yaswanth Murugesan, Can Ayas, Lucia Nicola
Summary: Discrete dislocation plasticity is a modeling technique that treats plasticity as the collective motion of dislocations, with the core fields affecting edge dislocation interactions. Simulation results show that the influence of core fields is negligible compared to Volterra fields or external loads.
MECHANICS OF MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Wenfan Yang, Mingyu Gong, Jiahao Yao, Jiangwei Wang, Shijian Zheng, Xiuliang Ma
Summary: The study shows that introducing a disordered interface in Cu/Nb multilayers can significantly enhance their hardness by relaxing the Burgers vectors of dislocations. These findings are expected to provide new insights for the development of novel materials with ultrahigh hardness.
SCRIPTA MATERIALIA
(2021)
Article
Multidisciplinary Sciences
Joel Martis, Sandhya Susarla, Archith Rayabharam, Cong Su, Timothy Paule, Philipp Pelz, Cassandra Huff, Xintong Xu, Hao-Kun Li, Marc Jaikissoon, Victoria Chen, Eric Pop, Krishna Saraswat, Alex Zettl, Narayana R. Aluru, Ramamoorthy Ramesh, Peter Ercius, Arun Majumdar
Summary: Four-dimensional scanning transmission electron microscopy (4D-STEM) was used to determine the electron charge density in monolayer MoS2 by combining center of mass (CoM) images and annular dark field (ADF) images. The contribution of core electrons and valence electrons to the charge density was evaluated, with the core electrons mainly responsible for the spatial modulation and the valence electrons forming a featureless background. This study highlights the importance of probe shape in interpreting charge densities derived from 4D-STEM and suggests the need for smaller electron probes.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Minsu Choi, Hyunwoo Jeon, Kitae Eom, Jinsol Seo, Seulki Roh, Ilwan Seo, Sang Ho Oh, Jungseek Hwang, Yunsang Lee, Warren E. Pickett, Christos Panagopoulos, Chang-Beom Eom, Jaichan Lee
Summary: Chemical dopants, traditionally treated as randomly and uniformly distributed, play a critical role in device performance, especially in nanostructured architectures where their position relative to interfaces or boundaries greatly influences the properties. Geometrical control of dopants at the atomic scale, known as geometrical doping, provides a new way to tune emergent electronic states and advance the understanding of solid-state properties.
Article
Physics, Applied
Qichang An, Zhe Xu, Zhenzhen Wang, Meng Meng, Mengxue Guan, Sheng Meng, Xuetao Zhu, Haizhong Guo, Fang Yang, Jiandong Guo
Summary: By controlling reversible phase transitions between perovskite LaCoO3 and brownmillerite LaCoO2.5, the concentration and spatial distribution of oxygen vacancies (Vo) in PV-LCO can be tuned to enhance its ferromagnetism.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Xiangming Xu, Chenghui Zhang, Jun Yin, Jasmin Smajic, Mohammed Bahabri, Yongjiu Lei, Mohamed Nejib Hedhili, Mrinal K. Hota, Lin Shi, Tianchao Guo, Dongxing Zheng, Jehad K. El-Demellawi, Mario Lanza, Pedro M. F. J. Costa, Osman M. Bakr, Omar F. Mohammed, Xixiang Zhang, Husam N. Alshareef
Summary: Superconductivity has been induced in MXenes at the nano scale through surface modification. An atomic exchange process in NH3 atmosphere was developed to induce superconductivity in single flakes or thin films of Nb2CTx MXene. The exchange process and related structural adjustments were studied using experiments and density functional theory. An anisotropic magnetic response of the 2D superconducting transformation was successfully revealed using single-flake or thin-film devices. The anisotropic superconductivity was further demonstrated using superconducting thin films uniformly deposited over a 4 in. wafer, enabling the possibility of scalable MXene-based superconducting devices.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Yuxin Liu, Wenhua Han, Zeen Hong, Wen Wu Xu, Endong Wang
Summary: The charge states of thiolate-protected gold nanoclusters are found to be correlated with the core structural packing, especially the number of Au-3(2e) elementary blocks. By controlling the number of Au-3(2e) blocks, new AuNCs can be predicted. This study bridges the gap between the charge states, core structures, and ligand detachment of nanoclusters using the grand unified model.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Engineering, Chemical
Xiaojuan Gong, Jiapeng Liu, Jianwei Teng, Xianjue Ye, Zhongchang Wang, Ruilin Lai, Yunping Li
Summary: The Ag precipitation and oxidation behavior of Cu-5wt.%Ag powder with different particle sizes were investigated. It was found that at low temperature, Ag precipitation mainly occurred along grain boundaries on the particle surface and was closely related to particle size. Conversely, at high temperature, the size of the particles did not affect the Ag precipitation. Additionally, the formation of a continuous 3D Ag network on the particle surface significantly improved the oxidation resistance of the powder.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Chemistry, Physical
Zuxin Chen, Quan Chen, Zebing Chai, Bin Wei, Jun Wang, Yanping Liu, Yumeng Shi, Zhongchang Wang, Jingbo Li
Summary: The article introduces a novel ultrafast crystal growth technique, which can obtain high-quality large-sized GaSe crystals in a short period of time and demonstrates its potential application in optoelectronic devices.
Article
Chemistry, Physical
Shu Wang, Zhican Zhou, Fengyou Yang, Shengyao Chen, Qiaoxuan Zhang, Wenqi Xiong, Yusong Qu, Zhongchang Wang, Cong Wang, Qian Liu
Summary: By studying the band structures and electron transport properties of MoS2 atomristor, researchers have obtained a comprehensive memristive mechanism and successfully realized MoS2 all-atomristor logic gates. This discovery will open up many new opportunities for next-generation logic computing and data processing.
Article
Chemistry, Multidisciplinary
Wenjie Wang, Rong Sun, Wei Shen, Zhiyan Jia, Francis Leonard Deepak, Yujie Zhang, Zhongchang Wang
Summary: We investigated the air-sensitivity, atomic structure, and magnetic anisotropy of VI3 single crystals. Our results showed that VI3 nanocrystals have a large M-R/M-S ratio of about 0.75 and a uniaxial anisotropic constant of approximately 10(5) erg cc(-1) below the Curie temperature. Moreover, density functional theory calculations demonstrated that both monolayer and bulk VI3 exhibit ferromagnetic insulating properties, with the magnetic moment primarily originating from the d orbital of the V atom. These findings provide a feasible approach for fabricating TEM specimens of air-sensitive layered materials and enhance our understanding of the layered ferromagnetic VI3.
Article
Chemistry, Multidisciplinary
Jiale Zheng, Juncheng Wang, Tianqi Guo, Yao Wang, Jianwei Nai, Jianmin Luo, Huadong Yuan, Zhongchang Wang, Xinyong Tao, Yujing Liu
Summary: Controllable solid electrolyte interphase (SEI) nanostructures with excellent thermal stability are established through (trifluoromethyl)trimethylsilane (TMSCF3)-induced interface engineering. The uniform distributed nanocrystals enhance the thermostability of SEI based on density functional theory simulations. The sub-angstrom visualization of SEI through a transmission electron microscope (TEM) demonstrates its ultrahigh thermostability.
Article
Chemistry, Physical
Tianmeng Zhang, Hao Tan, Yao Du, Haimeng Huang, Mingxia Shen, Xing Liu, Zhongchang Wang, Jianfeng Zhang
Summary: The critical demand for zero wastewater discharge and water purification has emphasized the importance of appropriate membrane material design and applications. The design of porous nanopores in films is a promising solution for improving the film's low flux and poor selectivity. Through the design of a porous crystal skeleton-stimulated hard/soft film, abundant graded nanopores and fluid channels were obtained, greatly enhancing the transportation of water molecules across the film.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Analytical
Xiaosen Cui, Zhaorui Lu, Zhongchang Wang, Wen Zeng, Qu Zhou
Summary: Fiber-like p-CuO/n-ZnO heterojunction gas sensing materials were prepared to detect the decomposition byproducts of SF6: H2S and SO2. The sensors showed excellent performance in detecting H2S and SO2 with higher and faster response-recovery time. The sulfuration-desulfuration reaction between H2S and the sensing materials might contribute to the enhanced sensor performances. Furthermore, the sensors exhibited high response to low exposure of H2S and SO2 gas.
Article
Materials Science, Multidisciplinary
Yong Chen, Hongmei Zhu, Pengbo Zhang, Zhongchang Wang, Meng Wang, Gang Sha, He Lin, Jingyuan Ma, Zhenyuan Zhang, Yong Song, Pengfei Zheng, Lihua Zhou, Sheng Li, Hao Liu, Longzhang Shen, Changjun Qiu
Summary: The effective strategy to enhance impurity tolerance in structural steel is to increase solidification rate. By using laser additive manufacturing, we successfully engineered C, N and O with high contents as interstitial atoms coordinated with Cr in the form of short-range ordered assembly, resulting in the development of an impurity-tolerant supersaturated austenitic stainless steel with high strength, good ductility, enhanced corrosion resistance, and acceptable thermal stability.
Article
Materials Science, Multidisciplinary
Jingpeng Hou, Keliang Qiu, Fengshi Li, Zhenyu Yang, Yonghai Yue, Yongjun Tian, Zhongchang Wang, Lin Guo
Summary: Twin boundary (TB) is a special and fundamental internal interface that alters the mechanical and physical properties of materials. The deformation mechanism of TB and its effect on material strength and plasticity are still under debate. This study discovered that the pseudoelastic strain of a TB can recover with decomposition and escape of pile-up dislocations, which opens up new possibilities for optimizing material properties by manipulating twin boundaries at the nanoscale.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Tianqi Guo, Pengfei Hu, Lidong Li, Zhongchang Wang, Lin Guo
Summary: This article summarizes the important characteristics and applications of amorphous materials in the field of electrochemical energy storage and conversion, with particular emphasis on the significant roles of amorphous nanomaterials in lithium-ion batteries, lithium-metal batteries, and supercapacitors. It also discusses the challenges and future research directions for amorphous materials in various electrochemical techniques.
Article
Chemistry, Multidisciplinary
Tian Zheng, Pengfei Hu, Zhongchang Wang, Tianqi Guo
Summary: A 2D amorphous strategy for sodium ion batteries (SIBs) is proposed using amorphous iron selenide sulfide nanosheets (a-FeSeS NSs) as an anode material, demonstrating remarkable rate capability and long-life cycle performance. This study provides a new approach for structural engineering of other electrode materials.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Binbin Jia, Lidong Li, Chuang Xue, Jianxin Kang, Li-min Liu, Tianqi Guo, Zhongchang Wang, Qizheng Huang, Shaojun Guo
Summary: This study reports a sacrificial protection strategy to stabilize crystalline CuO by embedding active amorphous SnO2, which greatly enhances the electrocatalytic sensitivity, activity, and stability for CO2RR to formate. The hybrid catalyst exhibits superior selectivity and current density, outperforming industrial benchmarks.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Xinzhu Gao, Quan Chen, Qinggang Qin, Liang Li, Meizhuang Liu, Derek Hao, Junjie Li, Jingbo Li, Zhongchang Wang, Zuxin Chen
Summary: By intelligently designing a tri-gate two-dimensional ferroelectric van der Waals heterostructures device using copper indium thiophosphate and few layers tungsten disulfide, the researchers demonstrate its versatile applications in multi-valued data, non-volatile storage, and logic operations. The device can flexibly switch functions at a low supply voltage, offering a high switching ratio and low subthreshold swing.
Article
Chemistry, Physical
Lei Wang, Shu Wang, Xiaofeng Wang, Jianming Zhang, Jianjie Dong, Bin Wei, Haiguang Yang, Zhongchang Wang, Ziyang Zhang, ChuanFei Guo, Qian Liu
Summary: When a laser beam is used to write on a metallic film, it can cause the large grains in the film to melt and break into uniform and ultrafine grains. This method exhibits high control over grain size and uniformity, with a linear relationship between film thickness and grain size. The resulting silver film with ultrafine grains can be used as a surface-enhanced Raman scattering chip with high spatial uniformity and low detection limit.
Article
Chemistry, Inorganic & Nuclear
Lei Wu, Ruixin Zhang, Qun Jing, Hongyu Huang, Xianmeng He, Zhongchang Wang, Zhaohui Chen
Summary: A new UV NLO orthophosphate β-Li2RbBi(PO4)2 with a polar structure and high second harmonic generation response has been successfully synthesized. First-principles calculations reveal that the synergistic effect of P-O and Bi-O groups significantly contributes to the optical properties of this compound.
INORGANIC CHEMISTRY FRONTIERS
(2023)