Article
Materials Science, Multidisciplinary
A. A. Zaitsev, I Konyashin, P. A. Loginov, E. A. Levashov, A. S. Orekhov
Summary: In situ annealing of a FIB lamella obtained from nanostructured WC-Co hardmetal in a transmission electron microscope at 950 degrees C results in the dissolution of some Co interlayers and small Co pools. Significantly, abnormal fast Co diffusion at WC/Co grain boundaries is observed, presumably due to the combined effect of high temperature and electron irradiation by an electron beam in the transmission electron microscope.
Article
Chemistry, Multidisciplinary
Kasper A. Hunnestad, Jan Schultheiss, Anders C. Mathisen, Ivan N. Ushakov, Constantinos Hatzoglou, Antonius T. J. van Helvoort, Dennis Meier
Summary: Polar discontinuities and compositional/structural changes at oxide interfaces can result in various electronic and ionic phenomena. This study investigates the relationship between polar discontinuities and local chemistry at grain boundaries in polycrystalline ferroelectric ErMnO3. It is found that the polycrystalline material develops charged grain boundaries with enhanced electronic conductance. The observed changes in composition are determined by structural phenomena rather than electrostatics, leading to changes in electronic transport behavior.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Kasper A. Hunnestad, Jan Schultheiss, Anders C. Mathisen, Ivan N. Ushakov, Constantinos Hatzoglou, Antonius T. J. van Helvoort, Dennis Meier
Summary: This study investigates the relation between polar discontinuities and the local chemistry at grain boundaries in polycrystalline ferroelectric ErMnO3. The results show that there are compositional changes at grain boundaries that exceed possible polarization-driven effects, indicating that structural phenomena rather than electrostatics determine changes in electronic transport behavior.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
W. Xu, B. Zhang, K. Du, X. Y. Li, K. Lu
Summary: By means of cryogenic plastic deformation, a high proportion of relaxed grain boundaries can be generated in the Al-5Mg alloy, which is essential for stabilizing nanostructured alloys.
Article
Energy & Fuels
Thomas Fiducia, Ashley Howkins, Ali Abbas, Budhika Mendis, Amit Munshi, Kurt Barth, Walajabad Sampath, John Walls
Summary: Cadmium telluride (CdTe) solar cells achieve high efficiencies through passivation of grain boundaries and grain interior defects. The use of selenium alloying in Cd(Se-x,Te1-x) material further improves the passivation effect, providing new possibilities for efficiency improvement and cost reduction in solar electricity.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Review
Chemistry, Multidisciplinary
Maolin Yu, Zhili Hu, Jingzhuo Zhou, Yang Lu, Wanlin Guo, Zhuhua Zhang
Summary: This review article summarizes recent advances in studying the formation mechanism, atomic structures, and functional properties of grain boundaries (GBs) in 2D materials. A complete understanding of the rich GB morphologies, their dependence on lattice misorientations and chemical compositions, is presented by analyzing the growth mechanism and the competition between far-field strain and local chemical energies of dislocation cores. The mechanical, electronic, and chemical properties tied to GBs in different materials are discussed, along with the concept of using GBs as a robust atomic-scale scaffold for realizing tailored functionalities such as magnetism, luminescence, and catalysis. Future opportunities in retrieving GBs for making functional devices and the major challenges in the controlled formation of GB structures for designed applications are also commented.
Article
Geochemistry & Geophysics
Filippe Ferreira, Lars N. Hansen, Katharina Marquardt
Summary: The study focuses on the plastic deformation and the role of grain boundaries in olivine deformation. Specific types of grain boundaries created by dislocation activity facilitate grain-boundary sliding. With progressive deformation, there is an increase in abundance of apparently slip-transparent boundaries.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Nanoscience & Nanotechnology
L. Morsdorf, A. Kashiwar, C. Kuebel, C. C. Tasan
Summary: Tempering is commonly used in high strength steel microstructures to rearrange carbon atoms, but its nano-scale interaction with crystallographic defects is challenging to observe experimentally. In this study, we investigate the redistribution of carbon atoms along martensite grain boundaries in low carbon steel after quenching and tempering using transmission electron microscopy (TEM) and atom probe tomography (APT). Our findings reveal that the amount of carbon segregation to martensite grain boundaries depends on the boundary type, and the growth behavior of cementite precipitates differs at low- and high-angle grain boundaries due to crystallographic constraints. We also demonstrate the impact of carbon redistribution on the mechanical properties by comparing hardness results from boundary-containing probe volumes to nanoindentation results from pure bulk martensite volumes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Chaoqun Dang, Weitong Lin, Fanling Meng, Hongti Zhang, Sufeng Fan, Xiaocui Li, Ke Cao, Haokun Yang, Wenzhao Zhou, Zhengjie Fan, Ji-jung Kai, Yang Lu
Summary: This study introduces a facile strategy to enhance the ductility and yield strength of tungsten microcomponents, demonstrating potential applications in micro/nanoscale mechanical, electronic, and energy systems.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Optics
Peng You, Guanqi Tang, Jiupeng Cao, Dong Shen, Tsz-Wai Ng, Zafer Hawash, Naixiang Wang, Chun-Ki Liu, Wei Lu, Qidong Tai, Yabing Qi, Chun-Sing Lee, Feng Yan
Summary: A unique approach of modifying the edges of perovskite grain boundaries with high-mobility 2D materials can significantly enhance the performance of PSCs by conducting holes from the grain boundaries to the hole transport layers, forming hole channels in the devices. This cost-effective strategy presents a synergistic effect between the 2D flakes and perovskite grain boundaries for improving the photovoltaic performance of PSCs.
LIGHT-SCIENCE & APPLICATIONS
(2021)
Review
Chemistry, Multidisciplinary
Zheng Gao, Chongqian Leng, Hongquan Zhao, Xingzhan Wei, Haofei Shi, Zeyun Xiao
Summary: This review provides an overview of the electrical properties of grain boundaries in polycrystalline optoelectronic materials and discusses the factors influencing the electrical behaviors of grain boundaries. It also explores how modifying the electrical behaviors of grain boundaries can enhance the performance of optoelectronic devices.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
C. Y. Hung, G. Vetterick, E. Hopkins, J. K. Balwin, P. Baldo, M. A. Kirk, A. Misra, M. L. Taheri
Summary: The design of radiation-tolerant polycrystalline materials has been focused on manipulating grain boundaries to eliminate point defects and defect clusters. The study reveals the dynamics of defect clusters and their annihilation at grain boundaries in nanocrystalline materials.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
W. Xu, Y. C. Xin, B. Zhang, X. Y. Li
Summary: This study successfully addresses the issues of intergranular corrosion and stress corrosion cracking in high Mg-containing Al alloys by fabricating nanostructured Al-5Mg alloy with a high proportion of low angle grain boundaries through dynamic plastic deformation and appropriate annealing. The alloy shows excellent intergranular corrosion resistance and stress corrosion cracking resistance, as well as improved strength and ductility.
Article
Chemistry, Physical
Xin Xu, Connor Carr, Xinqi Chen, Benjamin D. Myers, Ruiyun Huang, Weizi Yuan, Sihyuk Choi, Dezhi Yi, Charudatta Phatak, Sossina M. Haile
Summary: This study reveals the variation in grain boundary properties of polycrystalline ionic materials and the correlation between grain boundary resistance and impurity concentration. The findings suggest that the grain boundary resistance may be caused by impurity-generated space charge effects and driven by the energetics of impurity segregation.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Takumi Nakano, Toshihiko Maeda, Takeshi Fujita, Aichi Yamashita
Summary: The substitution effects of 3d transition metal elements (Fe, Co, and Zn) on the Cu site in (Pb,Cu)-1-2-0-1 were investigated, resulting in the successful synthesis of new materials (Pb0.5M0.5)(Sr0.75La0.25)2CuOz (M = Fe and Co) and (Pb0.5Zn0.5)(Sr0.5La0.5)2CuOz. Superconductivity was only observed in the case of M = Zn.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Madhvi, Laxman Singh, Sudhakar Saroj, Youngil Lee, Satya Vir Singh
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2016)
Review
Instruments & Instrumentation
Laxman Singh, Shiv Sunder Yadava, Won Seok Woo, Uma Shanker Rai, K. D. Mandal, Byung Cheol Sin, Youngil Lee
APPLIED SPECTROSCOPY REVIEWS
(2016)
Article
Engineering, Electrical & Electronic
Laxman Singh, Shiva Sundar Yadava, Byung Cheol Sin, Uma Shanker Rai, K. D. Mandal, Youngil Lee
JOURNAL OF ELECTRONIC MATERIALS
(2016)
Article
Chemistry, Physical
Byung Cheol Sin, Laxman Singh, JiEun An, Hansol Lee, Hyung-il Lee, Youngil Lee
JOURNAL OF POWER SOURCES
(2016)
Article
Physics, Multidisciplinary
Li Wang, Qian Yue, KeJun Kang, JianPing Cheng, YuanJing Li, TszKing Henry Wong, ShinTed Lin, JianPing Chang, JingHan Chen, QingHao Chen, YunHua Chen, Zhi Deng, Qiang Du, Hui Gong, Li He, QingJu He, JinWei Hu, HanXiong Huang, TengRui Huang, LiPing Jia, Hao Jiang, HauBin Li, Hong Li, JianMin Li, Jin Li, Jun Li, Xia Li, XueQian Li, YuLan Li, FongKay Lin, ShuKui Liu, Hao Ma, JingLu Ma, XingYu Pan, Jie Ren, XiChao Ruan, ManBin Shen, Vivek Sharma, Lakhwinder Singh, Manoj Kumar Singh, Manoj Kumar Singh, Arun Kumar Soma, ChangJian Tang, WeiYou Tang, ChaoHsiung Tseng, JiMin Wang, Qing Wang, ShiYong Wu, YuCheng Wu, HaoYang Xing, Yin Xu, Tao Xue, LiTao Yang, SongWei Yang, Nan Yi, ChunXu Yu, HaiJun Yu, WeiHe Zeng, XiongHui Zeng, Zhi Zeng, Lan Zhang, YunHua Zhang, MingGang Zhao, Wei Zhao, JiFang Zhou, ZuYing Zhou, JingJun Zhu, WeiBin Zhu, ZhongHua Zhu
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2017)
Article
Chemistry, Analytical
Byung Cheol Sin, Laxman Singh, Jiwon Lee, Youngil Lee
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2018)
Article
Engineering, Electrical & Electronic
Laxman Singh, Muhammad Sheeraz, Mahmudun Nabi Chowdhury, U. S. Rai, Shiva Sunder Yadava, Young Seok Park, Satya Vir Singh, Youngil Lee
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2018)
Article
Engineering, Electrical & Electronic
Shiva Sundar Yadava, Laxman Singh, Minsoo Ji, Atendra Kumar, K. D. Mandal, Youngil Lee
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2018)
Article
Electrochemistry
Laxman Singh, Atendra Kumar, Hansol Lee, Jiwon Lee, Minsoo Ji, Youngil Lee
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Laxman Singh, Jiwon Lee, Geun Wan Kim, Minsoo Ji, Chaewon Moon, Hansol Lee, Ji Won Ha, Youngil Lee
NEW JOURNAL OF CHEMISTRY
(2018)
Article
Multidisciplinary Sciences
Laxman Singh, Uday Pratap Azad, Satendra Pal Singh, Vellaichamy Ganesan, U. S. Rai, Youngil Lee
SCIENTIFIC REPORTS
(2017)
Article
Engineering, Biomedical
Laxman Singh, Zainul Abdin Jaffery
INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING AND TECHNOLOGY
(2018)
Article
Engineering, Biomedical
Laxman Singh, Zainul Abdin Jaffery
INTERNATIONAL JOURNAL OF BIOMEDICAL ENGINEERING AND TECHNOLOGY
(2017)
Article
Engineering, Biomedical
Zainul Abdin Jaffery, Zaheeruddin, Laxman Singh
COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING-IMAGING AND VISUALIZATION
(2017)
Article
Materials Science, Ceramics
Laxman Singh, Byung Cheol Sin, Ill Won Kim, K. D. Mandal, Hoeil Chung, Youngil Lee
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2016)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)