Article
Chemistry, Multidisciplinary
Yaqin Zhang, Yuhang Wang, Ninggui Ma, Bochun Liang, Yu Xiong, Jun Fan
Summary: This study reports the enhanced catalytic performance of Ti2CO2 MXene with biaxial tensile strain engineering. The strain modifies the electronic structure and formation energy of oxygen vacancy, resulting in improved intermediate adsorption and superior nitrogen electrocatalytic reduction. Additionally, the different response speeds of intermediates to strain and the diverse adsorption behaviors are observed, providing insights into the catalytic mechanisms.
Article
Chemistry, Multidisciplinary
David M. Mahler, Valentin L. Mueller, Cornelius Thienel, Jonas Wiedenmann, Wouter Beugeling, Hartmut Buhmann, Laurens W. Molenkamp
Summary: Magneto-transport measurements on gated high-mobility heterostructures containing a 60 nm layer of tensile-strained HgTe reveal the presence of well-developed Hall quantization from surface states in both n- and p-type regimes. While the n-type behavior is attributed to transport in the topological surface state, the p-type transport is shown to result from massive Volkov-Pankratov states, preventing the observation of the p-conducting topological surface state in transport experiments.
Article
Chemistry, Multidisciplinary
Shuhe Han, Changhong Wang, Yuting Wang, Yifu Yu, Bin Zhang
Summary: Nitrate is an essential raw material in agriculture and industry, but the electrochemical nitrogen oxidation reaction (NOR) shows potential to replace traditional nitrate synthesis with high energy consumption and greenhouse gas emissions. Tensile-strained palladium porous nanosheets (Pd-s PNSs) were found to have enhanced activity for electrochemical NOR, outperforming Pd nanosheets. Experiments with N-15 isotope labeling confirmed that nitrate originates from nitrogen oxidation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Yingzheng Zhang, Haeseong Jang, Xin Ge, Wei Zhang, Zijian Li, Liqiang Hou, Li Zhai, Xiaoqian Wei, Zhe Wang, Min Gyu Kim, Shangguo Liu, Qing Qin, Xien Liu, Jaephil Cho
Summary: This study demonstrates that atomically dispersed Sn on strained ZnO nanosheets (Sn SA/ZnO) shows significantly improved activity and selectivity for formate production. Compared to commercial ZnO, Sn SA/ZnO exhibits a 205-fold mass activity enhancement over a wide potential window and enhances catalytic selectivity by strengthening the adsorption of intermediates for the electrochemical reduction of CO2 to formate.
ADVANCED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Jie Chen, Hang Li, Tengyu Guo, Peng Chen, Dongfeng Zheng, Guoqiang Yu, Yong-Chang Lau, Xuekui Xi, Wenhong Wang
Summary: We report an unusual change in the anomalous anisotropic magnetoresistance (AMR) effect in HoPtBi, where the AMR transitions from quasi-twofold to fourfold symmetry and forms a stable rotated fourfold symmetry with increasing magnetic fields. The 3D mapping experiments confirm that it is an intrinsic 3D effect. Fourier transformation analysis indicates that the superposition of C-2, C-4, and C-6 signals with phase angle transitions leads to the novel AMR. By combining the band structures and AMR features, we evaluate the possible origin of the symmetry rotation and attribute it to the topological band change. This work provides insight into the anomalous AMR effect of topological materials and has implications for understanding the evolution of topological bands in a magnetic field. We propose that other rare-earth half-Heusler alloys can potentially exhibit similar phenomena.
NPG ASIA MATERIALS
(2023)
Article
Physics, Condensed Matter
Francisco J. Pena, Oscar Negrete, Ning Ma, Patricio Vargas, M. Reis, Leandro R. F. Lima
Summary: In this study, we theoretically investigate the thermoelectric transport properties of strained HgTe in the topological insulator phase. By developing a model that takes into account the effect of strain induced by the interface between HgTe and the CdTe substrate, we explore the conductivity and thermopower effects and compare them with other two-dimensional Dirac materials.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Materials Science, Multidisciplinary
Veronika C. Stangier, Erez Berg, Joerg Schmalian
Summary: By strain tuning Sr2RuO4, the temperature dependence of the electrical resistivity can be changed, consistent with experimental results. The thermal resistivity is governed by distinct processes involving compressive modes.
Article
Nanoscience & Nanotechnology
David Curie, Jaron T. Krogel, Lukas Cavar, Abhishek Solanki, Pramey Upadhyaya, Tongcang Li, Yun-Yi Pai, Michael Chilcote, Vasudevan Iyer, Alexander Puretzky, Ilia Ivanov, Mao-Hua Du, Fernando Reboredo, Benjamin Lawrie
Summary: This study reveals the effect of strain on the negatively charged boron vacancy color center (VB-) in hexagonal boron nitride (hBN) through correlative cathodoluminescence and photoluminescence microscopies. The results show that strong localized enhancement and redshifting of the VB- luminescence can be observed at creases, consistent with density functional theory calculations.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jinsol Bok, Si Young Lee, Byoung-Hoon Lee, Cheonghee Kim, Dang Le Tri Nguyen, Ji Won Kim, Euiyeon Jung, Chan Woo Lee, Yoon Jung, Hyeon Seok Lee, Jiheon Kim, Kangjae Lee, Wonjae Ko, Young Seong Kim, Sung-Pyo Cho, Jong Suk Yoo, Taeghwan Hyeon, Yun Jeong Hwang
Summary: The interaction between metals and metal-organic frameworks can significantly enhance the activity, selectivity, and stability of atomically dispersed Au on tensile-strained Pd nanoparticles, leading to improved formate production with high CO tolerance.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Food Science & Technology
Chen Li, Xiaoyong Wang, De Zhang, Yuqiong Chen, Xinfeng Jiang, Dejiang Ni
Summary: This study examined the variation in the main mechanical properties of fresh tea leaves during the processing of Longjing tea. The plasticity and elasticity of the leaves showed opposite tendencies, with plasticity initially increasing and then decreasing, while elasticity initially decreasing and then increasing. The flexibility reached its maximum during the fixing stage and gradually declined afterward. The main mechanical properties of different tender materials changed differently during the processing, and their optimization can be guided by these findings.
Article
Physics, Multidisciplinary
Christopher Broyles, David Graf, Haitao Yang, Xiaoli Dong, Hongjun Gao, Sheng Ran
Summary: This study found that the complex structural distortion of CsV3Sb5 has a significant impact on the Fermi surface properties, and provided strong evidence for interlayer ordering.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Jun Yong Khoo, Falko Pientka, Inti Sodemann
Summary: Metallic Fermi liquids and U(1) spin liquids exhibit the same universal transverse conductivity under specific conditions, behaving as metals in a certain regime despite appearing insulating in standard transport experiments. Fluctuations in transverse current result in a directly probed low-frequency magnetic noise, controlled purely by the geometry of the Fermi surface and independent of kinematic details of quasi-particles.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Physical
Hao Liu, Jiyu Fan, Fengjiao Qian, Yanda Ji, Azizur Rahman, Rujun Tang, Lei Zhang, Langsheng Ling, Yan Zhu, Hao Yang
Summary: High-quality epitaxial LaCoO3 thin films deposited on SrTiO3 substrates exhibit a ferromagnetic-paramagnetic phase transition near 80 K. Critical exponents of beta = 0.754(1) and gamma = 1.52(2) were determined, confirming the two-dimensional long-range magnetic interaction within the films. Further analysis suggests a decay in magnetic exchange distance as J(r) ∼ r^(-3.46).
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Chandra S. Perugu, Krishna Kamlesh Verma, H. C. Madhu, Padaikathan Pambannan
Summary: By employing squeeze casting and hot rolling processes, followed by annealing, a Mg-3Sn-2Al alloy with high strength and good ductility can be achieved. The excellent properties of this alloy are attributed to the synergistic effects of grain refinement, solid-solution strengthening, and uniform distribution of fine particles.
Article
Chemistry, Physical
Philippe Guyot-Sionnest, John C. Peterson, Christopher Melnychuk
Summary: This study analyzes a simple photoconductor structure based on a HgTe colloidal quantum dot film and provides quantitative information on its properties. The carrier lifetime mechanism for this film is determined to be geminate recombination. This research is a step towards understanding the relationship between the individual properties of CQDs and their distribution in a film and the simpler macroscopic optical and electrical properties of a homogeneous semiconductor.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)