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The effect of Cr and Zr content on the microstructure and properties of the Cu-Cr-Zr system alloy

IOP Conference Series: Materials science and engineering 2018年第1期447卷

作者： E A Sarkeeva V D Sitdikov G I Raab W Wei I V Alexandrov Ufa State Aviation Technical University 12 K. Marx 450000 Ufa Russia School of Materials Science and Engineering Changzhou University 1 Gehu Road Changzhou 213164 P.R. China Jiangsu Key Laboratory of Materials Surface Science and Technology Changzhou University Changzhou 213164 P.R. China Joint Laboratory of Functional Nanostructured Metals Changzhou University Changzhou 213164 P.R. China

This article investigates the effect of various contents of Cr and Zr on the microstructure and properties of the alloy of the Cu-Cr-Zr system. It has been defined that an increase in the content of Zr leads to a decrease in the grain size both in the initial state and after severe plastic deformation. The increase in the content of Zr significantly enhances the strength of the alloy.

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Micro-Supercapacitors: Aqueous MXene/PH1000 Hybrid Inks for Inkjet-Printing Micro-Supercapacitors with Unprecedented Volumetric Capacitance and Modular Self-Powered Microelectronics (Adv. Energy Mater. 23/2021)

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advanced Energy Materials 2021年第23期11卷

作者： Jiaxin Ma Shuanghao Zheng Yuexian Cao Yuanyuan Zhu Pratteek Das Hui Wang Yu Liu Jiemin Wang Liping Chi Shengzhong (Frank) Liu Zhong-Shuai Wu State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China University of Chinese Academy of Sciences 19 A Yuquan Road Shijingshan District Beijing 100049 China Dalian National Laboratory for Clean Energy Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China College of Materials Science and Engineering Dalian Jiaotong University 794 Huanghe Road Dalian 116028 China Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology School of Materials Science and Engineering Shaanxi Normal University 620 West Chang'an Street Xi'an 710119 China

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Evidences for the random singlet phase in a new honeycomb iridate SrIr2O6−δ

arXiv

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arXiv 2021年

作者： Song, Pengbo Zhu, Kejia Yang, Fan Wei, Yuan Zhang, Lu Yang, Huaixin Sheng, Xian-Lei Qi, Yang Ni, Jiamin Li, Shiyan Li, Yanchun Cao, Guanghan Meng, Zi Yang Li, Wei Shi, Youguo Li, Shiliang Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China School of Physical Sciences University of Chinese Academy of Sciences Beijing100190 China School of Physics and Materials Science Anhui University Anhui Hefei230601 China School of Physics Beihang University Beijing100191 China Yangtze River Delta Physics Research Center Co. Ltd. Jiangsu Liyang213300 China Center for Field Theory and Particle Physics Department of Physics Fudan University Shanghai200433 China State Key Laboratory of Surface Physics Department of Physics Fudan University Shanghai200438 China Multidiscipline Research Center Institute of High Energy Physics Chinese Academy of Science Beijing100049 China Department of Physics Zhejiang University Hangzhou310027 China Zhejiang Province Key Laboratory of Quantum Technology and Devices Interdisciplinary Center for Quantum Information State Key Lab of Silicon Materials Zhejiang University Hangzhou310027 China Collaborative Innovation Centre of Advanced Microstructures Nanjing University Nanjing210093 China Department of Physics HKU-UCAS Joint Institute of Theoretical and Computational Physics University of Hong Kong Pokfulam Road Hong Kong International Research Institute of Multidisciplinary Science Beihang University Being100191 China Songshan Lake Materials Laboratory Guangdong Dongguan523808 China

Strong spin-orbital-coupling magnetic systems with the honeycomb structure can provide bond-directional interactions which may result in Kitaev quantum spin liquids and exotic anyonic excitations. However, one of the key ingredients in real materials–disorders–has been much less studied in Kitaev systems. Here we synthesized a trigonal SrIr2O6−δwith δ ≈ 0.25, which consists of two-dimensional honeycomb Ir planes with edge-sharing IrO6 octahedra. First-principles computation and experimental measurements suggest that the electronic system is gapped, and there should be no magnetic moment as the Ir5+ ion has no unpaired electrons. However, significant magnetism has been observed in the material, and it can be attributed to disorders that are most likely from oxygen vacancies. No magnetic order is found down to 0.05 K, and the low-temperature magnetic properties exhibit power-law behaviors in magnetic susceptibility and zero-field specific heat, and a single-parameter scaling of the specific heat under magnetic fields. These results provide strong evidence for the existence of the random singlet phase in SrIr2O6−δ, which offers a different member to the family of spin-orbital entangled iridates and Kitaev materials. Copyright © 2021, The Authors. All rights reserved.

关键词： Iridium compounds

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Modulation on Electrostatic Potential of Passivator for Highly Efficient and Stable Perovskite Solar Cells

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advanced Functional Materials 2023年第34期33卷

作者： Hang Su Jing Zhang Yingjie Hu Yuying Yao Xinxin Zheng Yutong She Binxia Jia Lili Gao Shengzhong (Frank) Liu Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Adv. Energy Mater. School of Materials Science and Engineering Shaanxi Normal University Xi'an Shaanxi 710119 China Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences 457 Zhongshan Road Dalian 116023 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences No.19(A) Yuquan Road Shijingshan District Beijing 100049 China

The perovskite layer contains a large number of charged defects that seriously impair the efficiency and stability of perovskite solar cells (PSCs), thus it is essential to develop an effective passivation strategy to heal them. Based on theoretical calculations, it is found that enhancing the electrostatic potential of passivators can improve passivation effect and adsorption energy between charged defects and passivators. Herein, an electrostatic potential modulation (EPM) strategy is developed to design passivators for highly efficient and stable PSCs. With the EPM strategy, 1-phenylethylbiguanide (PEBG) and 1-phenylbiguanide (PBG) are designed. It is found that the charge distribution and electrostatic potential of phenyl- and phenylethyl- substituent on the biguanide are significantly enhanced. The N atom directly bonding to the phenyl group shows larger positive charge than that bonding to the phenylethyl group. The modulated electrostatic potential makes PBG bind stronger with the defects on perovskite surface. Based on the effective passivation of EPM, a champion efficiency of 24.67% is realized and the device retain 91.5% of its initial PCE after ≈1300 h. The promising EPM strategy, which provides a principle of passivator design and allows passivation to be controllable, may advance further optimization and application of perovskite solar cells toward commercialization.

关键词： defects electrostatic potential passivation perovskites solar cells

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Transparent 0D Antimony Halides Glassy Wafer with Near-Unity Photoluminescence Quantum Yield for High Spatial Resolution X-Ray Imaging

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advanced Optical Materials 2023年第3期12卷

作者： Ziwei Xu Nan Li Xiangyang Yan Xi Wang Tong He Zhou Yang Shengzhong(Frank) Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China School of Chemistry and Chemical Engineering Shaanxi Normal University Xi'an Shaanxi 710062 P. R. China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China University of the Chinese Academy of Sciences Beijing 100039 P. R. China

Large-sized transparent scintillators with a high photoluminescent quantum yield (PLQY) and self-absorption-free properties are highly desired to achieve high spatial resolution X-ray imaging. In this research, a transparent 0D organic–inorganic (ETP) 2 SbCl 5 (ETP = Ethyl triphenylphosphine) amorphous wafer is developed by melting the ETPCl and SbCl 3 mixture and then undergoing a quenching process. The obtained amorphous wafer exhibits a high light transmittance of 86% in the range of 450–800 nm. It also shows a light emission peak at 624 nm, a Stokes shift of 259 nm, and PLQY approaching unity (99.3%). These properties enable it to produce X-ray images with a high spatial resolution of 19.0 lp mm −1 at a modulation transfer function (MTF) value of 0.2, among the best values reported. Additionally, it also shows remarkable stability under continuous X-ray illumination. Its unique optical properties and ability to be processed in large sizes make the organic–inorganic metal halide transparent wafer a promising scintillator. This also demonstrates the potential application of the melt-quenching method in fabricating highly luminescent, low-electronic-dimensional metal halide wafers.

关键词： melt-quenching method metal halides scintillators spatial resolution

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Erratum: “Simulation of chiral motion of excitation within the ground-state manifolds of neutral atoms” [APL Quantum 1, 036109 (2024)]

APL Quantum

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APL Quantum 2024年第3期1卷

作者： Hao-Yuan Tang Xiao-Xuan Li Jia-Bin You Xiao-Qiang Shao Center for Quantum Sciences and School of Physics Northeast Normal University Changchun 130024 China Sino-European Institute of Aviation Engineering Civil Aviation University of China Tianjin 300300 China Institute of High Performance Computing A*STAR (Agency for Science Technology and Research) 1 Fusionopolis Way Connexis Singapore 138632 Center for Advanced Optoelectronic Functional Materials Research and Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education Northeast Normal University Changchun 130024 China

In the original version of this article initially published,1 there were still some typographical errors that should be corrected.

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Simulation of chiral motion of excitation within the ground-state manifolds of neutral atoms

APL Quantum

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APL Quantum 2024年第3期1卷

Laser-induced gauge fields in neutral atoms serve as a means of mimicking the effects of a magnetic field, providing researchers with a platform to explore behaviors analogous to those observed in condensed matter systems under real magnetic fields. Here, we propose a method to generate chiral motion in atomic excitations within the neutral atomic ground-state manifolds. This is achieved through the application of polychromatic driving fields coupled to the ground–Rydberg transition, along with unconventional Rydberg pumping. The scheme offers the advantage of arbitrary adjustment of the effective magnetic flux by setting the relative phases between different external laser fields. In addition, the effective interaction strength between the atomic ground states can be maintained at 10 kHz, surpassing the capabilities of the previous approach utilizing Floquet modulation. Notably, the proposed method can be readily extended to implement a hexagonal neutral atom lattice, serving as the fundamental unit in realizing the Haldane model.

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Cover Feature: Vertically Aligned Co9S8 Nanotube Arrays onto Graphene Papers as High‐Performance Flexible Electrodes for Supercapacitors (Chem. Eur. J. 10/2018)

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Chemistry – A European Journal 2017年第10期24卷 2294-2294页

作者： Dongbin Xiong Prof. Xifei Li Prof. Zhimin Bai Jianwei Li Dr. Yan Han Prof. Dejun Li Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing 100083 P.R. China Tianjin International Joint Research Centre of Surface Technology for Energy Storage Materials College of Physics and Materials Science Tianjin Normal University Tianjin 300387 P.R. China Institute of Advanced Clean Energy Xi'an University of Technology Xi'an 710048 P.R. China Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Collaborative Innovation Center of Chemical Science and Engineering College of Chemistry Nankai University Tianjin 300071 P.R. China

Vertically aligned Co9S8 nanotube arrays are deposited on conductive graphene paper as a flexible electrode. The Co9S8 nanotubes expose more electrochemical active sites to the electrolyte for effective ion transport (e.g., OH−), while the graphene paper is a robust substrate that effectively accelerates electron transport. The designed flexible electrode may be potentially utilized in portable/wearable electronics. More information can be found in the Communication by X. Li, Z. Bai, D. Li et al. on page 2339.

关键词： Co9S8 Graphene papers Nanotube arrays Supercapacitors Three-dimensional configuration

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Fluorescence: Silk Fluorescence Collimator for Ultrasensitive Humidity Sensing and Light-Harvesting in Semitransparent Dye-Sensitized Solar Cells (Small 13/2019)

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Small 2019年第13期15卷

作者： Fan Hu Wenzhe Liu Weifeng Li Zijie Xu Ying Ying Diao Nai Bo Lin Wenxi Guo Lei Shi Jan H. van Esch Xiang Yang Liu Research Institute for Biomimetics and Soft Matter College of Materials College of Physical Science and Technology Fujian Provincial Key Laboratory for Soft Functional Materials Research Xiamen University Xiamen 361005 China Advanced Soft Matter Group Department of Chemical Engineering Delft University of Technology Van der Maasweg 9 2629 HZ Delft The Netherlands Department of Physics Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of Education) and State Key Laboratory of Surface Physics Fudan University Shanghai 200433 China Department of Physics National University of Singapore 2 Science Drive 3 117542 Singapore Singapore

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Effect of cold rolling on the structure and properties of the UFG Cu-0.5wt%Cr alloy

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IOP Conference Series: Materials science and engineering 2019年第1期672卷

作者： E A Sarkeeva G I Raab W Wei I V Alexandrov Ufa State Aviation Technical University 12 K. Marx St. 450008 Ufa Russia Sino-Russian Joint Laboratory of Functional Nanostructured Materials Changzhou University Changzhou 213164 P.R. China School of Materials Science and Engineering Changzhou University 1 Gehu Road Changzhou 213164 P.R. China Jiangsu Key Laboratory of Materials Surface Science and Technology Changzhou University Changzhou 213164 P.R. China

The results of studying the microstructure, mechanical and electrical properties of the UFG alloy Cu-0.5wt.% Cr, obtained by equal-channel angular pressing (ECAP), followed by cold rolling and subjected to aging, are presented. It was found that, as a result, the average size of the fragmented structure is 160 nm. The results showed that the tensile strength increases with increasing degree of deformation. The maximum strength value of 605 MPa was achieved after a combination of 8 ECAP passes followed by rolling by 95%, while ductility was reduced to 13%. The number of ECAP passes and subsequent rolling practically do not affect the electrical conductivity and is 34-39% of IACS.

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