Article
Nanoscience & Nanotechnology
Zu Li, Meng Zhang, Tao Zhang
Summary: This study investigates the mechanisms of vibration-facilitated plastic deformation in metallic materials through tensile tests on copper single crystal foils under low-frequency vibrational loading. The experimental results show that increasing vibration frequency enhances the plastic deformability of the copper foils, which can be explained by the formation of equiaxial dislocation cells.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Mechanics
Zhuang Chen, Qingbing Dong, Xueyu Bai, Kun Zhou
Summary: In this study, the distributed dislocation technique is used to investigate the stick-slip friction of shear cracks in mechanical transmission components. The model is capable of simulating rolling contact problems and provides comparable results to the finite element method. The effects of friction coefficient, crack alignment, and locations of crack faces are discussed in detail, and the model paves the way for further studies on crack propagation and frictional fracture of materials under contact loading.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Chen-Yin Ni, Jin-Chao Lv, Yue-Ying Zhang, Hai-Yan He, Xi-Feng Xia, Zhong-Hua Shen, Vitalyi Gusev
Summary: The study focused on the responses of laser-generated acoustic waves to localized reversible/irreversible modifications of microscopic asperities on crack surfaces during crack closure. Reversible/irreversible modifications of asperities were achieved through non-contact photothermal loading of the crack. Significant differences in the peak-to-peak amplitude of the surface skimming longitudinal acoustic wave were revealed during the first cycle of photothermal loading, indicating partial irreversibility of mechanical processes.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Bin Chen, Wen-Ping Wu
Summary: This study used molecular dynamics simulations to investigate the dynamic mechanical response and microstructural evolution of Ni-based single crystal superalloys under different shock velocities. The results revealed that the shock effects at different velocities have varying impacts on the microstructure of the alloys.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
Chi Xu, Wentuo Han, Wenbin Xue, Yongliang Li, Song Li, Bingsheng Li, Farong Wan
Summary: The study observed in-situ dislocation motions in a single-crystalline gold thinfoil specimen driven by electron-beam illumination. Two types of dislocation motions were identified, with one leaving clear traces and the other leaving passage traces. The motions exhibit jerky behaviors and accelerate with increased beam intensity, leaving immobile trace structures identified as twin structures along the <111> crystal directions.
MATERIALS CHARACTERIZATION
(2022)
Article
Engineering, Mechanical
Jianwei Liang, Yan Peng, Wei Zhang, Jiapo Wang
Summary: The study on gradient loading creep behavior of nickel-based single crystal revealed that load and holding time significantly affect creep properties, with load changes causing instantaneous jumps in creep deformation and strain rate, while holding time mainly influencing the evolution of internal microstructure.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Engineering, Mechanical
Songlin Yao, Xiaoyang Pei, Jidong Yu, Qiang Wu
Summary: In this study, a method combining qualitative and quantitative analysis is proposed to establish a dislocation-based plasticity model and assess the time-dependent behavior of dislocation multiplication under shock loading. By applying dimensional analysis, ten potential governing equations for dislocation multiplication rate are derived, with only three equations found to predict the appropriate scaling coefficient of the plastic front. The newly derived stress-dependent governing equation is concluded to be more suitable for shock-loading process than commonly used equations by previous constitutive models.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Materials Science, Multidisciplinary
Caihong Hou, Wenjun Zhu, Jianbo Hu, Xiaoping Ouyang
Summary: In this paper, the anisotropic response mechanism and microscopic deformation mechanism of nanotwinned Cu with [111] texture under shock loading are investigated using molecular dynamics simulations. The results show that the textured nanotwinned Cu exhibits obvious anisotropy at lower impact velocities and the loading direction significantly influences the deformation behavior.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Qian-Qian Deng, Ying-Jun Gao, Zong-Ji Huang, Xiao-Ai Yi, Kun Liao, Zhi-rong Luo
Summary: This study simulates the evolution of grain boundary dislocation structure under biaxial tension-compression loading using the phase field crystal (PFC) method for small angle symmetric tilt grain boundary (STGB) of body center cubic (BCC) bi-crystal. The extension and increasing width of the STGB dislocation core under strain are studied. It is found that the dislocation core decomposes into three cores when it reaches maximum critical width, with two cores in a non-extended state and one core in an extended state.
COMPUTATIONAL MATERIALS SCIENCE
(2023)
Article
Automation & Control Systems
Ping Zhang, Songting Zhang, Zhenyong Lin, Shunxiang Wang, Xiujie Yue, Yeran Gao, Youqiang Wang
Summary: This study investigates the effect of different crystal orientations on the microstructure evolution of single-crystal copper during nanocutting process through simulation. The results show that crystal orientation has a significant impact on chip morphology, cutting surface, shear stress, dislocation formation, and dislocation density.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Hongquan Lu, Bin Dong, Junqian Zhang, Chaofeng Lu, Haifei Zhan
Summary: This study investigated the deformation behavior of copper nanowire under coupled tension-torsion loading using atomistic simulations. The results showed that the yielding pattern and dislocation pattern of the nanowire varied with different torsion/tension strain ratios. Additionally, the deformation behavior of the nanowire differed under tension-dominated loading and torsion-dominated loading. These findings have important implications for engineering applications.
Article
Materials Science, Multidisciplinary
Xiangru Guo, Ningdong Mao, Chaoyang Sun, Chunhui Wang, Yinan Cui, Zhiping Xiong
Summary: In this study, the tension-compression asymmetry and orientation effect of dislocation-twin boundary interactions in twinned TWIP steel were investigated using discrete dislocation dynamics simulations and Schmid's law. The research advances the understanding of the asymmetric behavior of twinning and its influence on the macro hardening in plastic deformation of TWIP steels.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Zhiwei Yan, Lin Wang, Zixuan Ning, Yanxing Li, Anjin Liu, Xingwang Cheng
Summary: TEM is used to study the microstructural evolution of the Ti6321 titanium alloy during contact explosion. Dislocations and deformation twins are observed after the explosion. {10-11} twins are generated to accommodate deformation when the slips of dislocations are blocked. The twin boundary deviates from the twin plane and is parallel to the (0001) plane of the matrix. Both dislocation slips and twinning contribute to the deformation resulting from the explosion.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Li Junye, Song Juncheng, Zang Xiang, Zhao Weihong, Zhang Xinming, Yan Wenduan
Summary: By utilizing molecular dynamics method, we applied tensile loads in various directions to an α-Ti model with preset microcracks. Observing changes in pores and dislocations, we unveiled the mechanisms of pore growth and potential energy distribution. Under different load directions, different phenomena such as cluster filling, lattice transformations, and dislocation generation were observed, affecting the material's plasticity and ductility.
RARE METAL MATERIALS AND ENGINEERING
(2021)
Review
Chemistry, Inorganic & Nuclear
Estefania Fernandez-Bartolome, Ana Martinez-Martinez, Esther Resines-Urien, Lucia Pineiro-Lopez, Jose Sanchez Costa
Summary: Recent literature has highlighted the reversibility in crystalline Coordination Compounds with a focus on Coordination Polymers, showing potential applications in sensors, molecular machines, selective compound storage, among others.
COORDINATION CHEMISTRY REVIEWS
(2022)
Article
Chemistry, Physical
Jiacheng Fan, Mengmeng Yuan, Libo Wang, Qixun Xia, Haiwu Zheng, Aiguo Zhou
Summary: In this study, a novel tribo-electric nanogenerator (TENG) was constructed using Ti3C2 MXene supported by cotton fabric as the electrode layer for self-powered flexible sensors. The electrode layer was made by immersing cotton fabric in a mixing suspension of Ti3C2 MXene and cellulose nanofibers (CNFs). The TENG showed excellent flexibility and sensing performance, with the ability to produce high voltage signals and sense the mass of touched objects. It has the potential to be used for self-powered monitoring of various physiological movements of the human body.
Article
Materials Science, Multidisciplinary
Yizhou Yang, Meikang Han, Christopher E. Shuck, Raj K. Sah, Jay R. Paudel, Alexander X. Gray, Yury Gogotsi, Steven J. May
Summary: High electrical conductivity is desired in MXene films for various applications. A systematic study was conducted to understand the contributions of composition and size to resistivity. The results showed that the Ti content correlated with conductivity and carrier mobility, while flake size and d-spacing had a more prominent impact on low-temperature transport.
Article
Materials Science, Multidisciplinary
Grace Cooksley, Marcus K. Dymond, Nicolas A. Stewart, Giselda Bucca, Andrew Hesketh, Joseph Lacey, Yury Gogotsi, Susan Sandeman
Summary: This study investigates the impact of two-dimensional titanium carbide MXene on pathways related to inflammation and epithelial-mesenchymal transition (EMT) using an in vitro LECs model. The results demonstrate that Ti3C2T(x) can decrease the expression of inflammatory cytokines and does not promote EMT, promoting a positive wound healing response.
Article
Materials Science, Multidisciplinary
Naresh C. Osti, Xiaobo Lin, Wei Zhao, Xuehang Wang, Chaofan Chen, Yu Gao, Takeshi Torita, Alexander Kolesnikov, Peter T. Cummings, Yury Gogotsi, Eugene Mamontov
Summary: In this study, the impact of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide, [EmimTFSI], ionic liquid and acetonitrile (ACN) concentrations on the electrochemical performance and ion dynamics of Ti3C2T (x) MXene supercapacitor was investigated. The results indicate that an optimal ACN concentration allows for more cations to attach to the MXene electrode surface, resulting in improved electrochemical performance. This increased capacitance is also associated with enhanced microscopic dynamics of the cation away from the pore wall. These findings provide guidance for optimizing the performance of MXene-based supercapacitors using organic solvents-ionic liquid-based electrolyte systems.
Editorial Material
Multidisciplinary Sciences
Yury Gogotsi
NATIONAL SCIENCE REVIEW
(2023)
Article
Chemistry, Multidisciplinary
Spencer R. R. Averbeck, Doris Xu, Brendan B. B. Murphy, Kateryna Shevchuk, Sneha Shankar, Mark Anayee, Marcelo Der Torossian Torres, Michael S. S. Beauchamp, Cesar de la Fuente-Nunez, Yury Gogotsi, Flavia Vitale
Summary: This study comprehensively investigates the stability of MXenes under various sterilization protocols and finds that autoclave and ethylene oxide sterilization do not alter the properties of MXenes, while hydrogen peroxide gas plasma sterilization severely degrades MXenes.
Article
Materials Science, Multidisciplinary
Fengling Wang, Sen Jin, Yaqiong Du, Qixun Xia, Libo Wang, Aiguo Zhou
Summary: This article introduces a new method for preparing highly pure MXene by etching with HBr or a mixture of HBr and other salts. The resulting Mo2CTX is terminated by Br/O and shows excellent co-catalytic properties in enhancing the photocatalytic performance of CdS for H2 production.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yitong Guo, Jingyang Du, Meihua Hu, Bin Wei, Taichao Su, Aiguo Zhou
Summary: In this study, the thermoelectric performance of Bi2Te3 was improved by incorporating Mo2C MXene, a two-dimensional material with moderate thermoelectric performance. The properties of Mo2C MXene were characterized, and it was found to be an N-type conductor with a Seebeck coefficient of -9.25 µV/K. The composite powders of Bi2Te3/Mo2C MXene were prepared and the resulting bulk samples showed enhanced thermoelectric properties, with a ZT value of 0.26 at 473 K, 78.6% higher than that of pure Bi2Te3. This is the first report on regulating thermoelectric performance using Mo2C MXene.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Mailis Lounasvuori, Tyler S. Mathis, Yury Gogotsi, Tristan Petit
Summary: Highly concentrated water-in-salt aqueous electrolytes have potential to replace flammable and toxic organic solvents in energy storage devices. By using operando infrared spectroscopy, this study investigates the hydrogen bonding changes of water confined between MXene layers during electrochemical cycling in a water-in-salt electrolyte. The results provide new insights into the structural changes of the electrolyte during Li+ intercalation in the MXene interlayer space.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Yitong Guo, Darong Liu, Bowen Huang, Libo Wang, Qixun Xia, Aiguo Zhou
Summary: Highly pure Mo2CTx MXene was prepared from Mo2Ga2C by hydrothermal method using different etching solutions. Delamination of multi-layer samples increased the interlayer distance and improved electrochemical performance as anode of Li-ion batteries. The Mo2CTx MXene after delamination exhibited higher discharge specific capacity and improved performance due to easily accessible ion active sites between layers and lower resistance. Increasing interlayer distance is crucial for enhancing the performance of Mo2CTx as anode of LIBs.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Biochemistry & Molecular Biology
Qixun Xia, Lijun Si, Keke Liu, Aiguo Zhou, Chen Su, Nanasaheb M. Shinde, Guangxin Fan, Jun Dou
Summary: A one-step sulfurization method was developed to fabricate Ni3S2 nanowires on a Ni foam, serving as a simple and low-cost electrode material for supercapacitors. The Ni3S2 nanowires exhibited high specific capacity and were grown hierarchically on the Ni foam using a hydrothermal method. The Ni3S2/NF electrode showed excellent performance with high specific capacity, good rate capability, and competitive cycling performance. The developed Ni3S2 nanowires electrode is expected to have great potential for supercapacitor applications.
Article
Materials Science, Multidisciplinary
Sen Jin, Yitong Guo, Fengling Wang, Aiguo Zhou
Summary: In this article, different synthesis routes of MXenes are summarized. MXenes are synthesized by selectively etching certain atomic layers from their layered precursors, mainly MAX phases. The commonly used method for MXene synthesis is wet-chemical etching, with hydrofluoric acid being the first etchant used. Environmental factors, such as temperature and pressure, influence the wet-chemical etching process, leading to the development of alternative etching methods, such as hydrothermal etching and electrochemical etching. Molten salt etching is also an important method for producing MXenes with more terminations.
Article
Electrochemistry
Geetha Valurouthu, Rachita Panigrahi, Mohit Saraf, Christopher E. Shuck, Bhabani S. Mallik, Narendra Kurra, Yury Gogotsi
Summary: This study reports the ambipolar electrochemical behavior of 2D Ti3C2Tx MXene in ionic liquid electrolyte. Redox peaks with small potential separation are observed at high negative and high positive potentials. Experimental data and DFT calculations suggest the feasibility of pseudo-intercalation of TFSI anions between Ti3C2Tx flakes. This study provides a pathway for exploring anion intercalation in solvent-free electrolytes, leading to improved performance of MXene-based energy storage devices.
BATTERIES & SUPERCAPS
(2023)
Article
Chemistry, Physical
Kateryna Shevchuk, Asia Sarycheva, Christopher E. Shuck, Yury Gogotsi
Summary: This study is the first systematic experimental Raman spectroscopy investigation of the MXene family. By exploring the vibrational spectra of MXenes with different structures and compositions, it provides the potential for fingerprinting and in situ studies of MXenes.
CHEMISTRY OF MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Marcelo A. Andrade, Timofey Averianov, Christopher E. Shuck, Kateryna Shevchuk, Yury Gogotsi, Ekaterina Pomerantseva
Summary: In this study, we demonstrate the synthesis of solid-solution MXenes through chemical etching to form oxides, which include vanadium oxide and niobium oxide. The results show that the formation of solid solutions facilitates the etching kinetics and accelerates the formation of MXenes. Moreover, the oxide derived from solid-solution MXenes exhibits composite-like behavior and shows good electrochemical cycling performance.
ACS APPLIED NANO MATERIALS
(2023)
