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arXiv 2023年

作者： Chen, Ziming Hoye, Robert L.Z. Yip, Hin-Lap Fiuza-Maneiro, Nadesh López-Fernández, Iago Otero-Martínez, Clara Polavarapu, Lakshminarayana Mondal, Navendu Mirabelli, Alessandro Anaya, Miguel Stranks, Samuel D. Liu, Hui Shi, Guangyi Xiao, Zhengguo Kim, Nakyung Kim, Yunna Shin, Byungha Shi, Jinquan Liu, Mengxia Zhang, Qianpeng Fan, Zhiyong Loy, James C. Zhao, Lianfeng Rand, Barry P. Arfin, Habibul Saikia, Sajid Nag, Angshuman Zou, Chen Lin, Lih Y. Xiang, Hengyang Zeng, Haibo Liu, Denghui Su, Shi-Jian Wang, Chenhui Zhong, Haizheng Xuan, Tong-Tong Xie, Rong-Jun Bao, Chunxiong Gao, Feng Gao, Xiang Qin, Chuanjiang Kim, Young-Hoon Beard, Matthew C. Department of Chemistry Centre for Processible Electronics Imperial College London LondonW12 0BZ United Kingdom Inorganic Chemistry Laboratory Department of Chemistry University of Oxford South Parks Road OxfordOX1 3QR United Kingdom Department of Materials Imperial College London Exhibition Road LondonSW7 2AZ United Kingdom Department of Materials Science and Engineering City University of Hong Kong Hong Kong Hong Kong School of Energy and Environment City University of Hong Kong Hong Kong Hong Kong CINBIO Universidade de Vigo Materials Chemistry and Physics Group Department of Physical Chemistry Campus Universitario As Lagoas Marcosende Vigo36310 Spain Department of Chemical Engineering and Biotechnology University of Cambridge CambridgeCB3 0AS United Kingdom Department of Physics CAS Key Laboratory of Strongly Coupled Quantum Matter Physics University of Science and Technology of China Anhui Hefei230026 China Daejeon34141 Korea Republic of Department of Electrical Engineering Yale University New HavenCT06511 United States Energy Sciences Institute Yale University West HavenCT06516 United States Department of Electronic & Computer Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong Hong Kong Department of Physics Princeton University PrincetonNJ08544 United States Department of Electrical and Computer Engineering Princeton University PrincetonNJ08544 United States Andlinger Center for Energy and the Environment Princeton University PrincetonNJ08544 United States Pune411008 India Zhejiang University Zhejiang Hangzhou310058 China University of Washington SeattleWA98195 United States MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics & Nanomaterials College of Materials Science and Engineering Nanjing University of Science and Technology Nanjing210094 China State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Opto

In recent years, the field of metal-halide perovskite emitters has rapidly emerged as a new community in solid-state lighting. Their exceptional optoelectronic properties have contributed to the rapid rise in external... 详细信息

关键词： Perovskite

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Optical-Electronic Skin Based on Tea Polyphenol for Dual Signal Wearable Sensing

Biosensors

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Biosensors 2025年第5期15卷 281页

作者： Jia-Li Xu Guangyao Zhao Jiachen Wang An Tang Jun-Tao Liu Zhijie Zhu Qiang Zhang Yu Tian School of Chemistry and Chemical Engineering Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province Zhejiang Sci-Tech University Hangzhou 310018 China. Department of Biomedical Engineering City University of Hong Kong Kowloon Hong Kong 999077 China. Jiangsu Advanced Textile Engineering Technology Center Jiangsu College of Engineering and Technology Nantong 226007 China. Institute of Digital Medicine City University of Hong Kong Kowloon Hong Kong 999077 China.

The rapid development of smart electronic skin has led researchers to design a variety of flexible and stretchable devices that can be used to monitor physiological and environmental signals. In this work, we successfully demonstrate a color-adjustable and conductive wearable optical-electronic skin (OE-skin) based on photonic crystal hydrogel that is capable of delivering both optical and electrical signal responses synchronously. The OE-skin is fabricated by incorporating a structural colored layer, composed of periodically aligned magnetic nanoparticles, into a polyacrylamide hydrogel matrix that contains tea polyphenols and borax. The dynamic boronate ester bonds formed between borax and the catechol groups of tea polyphenols are able to enhance the mechanical properties of the OE-skin, while also conferring excellent electrical conductivity, high sensitivity, and a rapid electrical response. Additionally, the tea polyphenols, which are natural active compounds derived from tea, possess diverse bioactive properties, thereby endowing the OE-skin with excellent antibacterial and biocompatibility characteristics. In addition, the developed electronic skin successfully demonstrates its capability in synergistic electronic and optical sensing during human motion monitoring, indicating broad application prospects in the field of smart wearable sensors.

关键词： dual-signal output dynamic boronate ester bonds optical–electronic skin structural color

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A new heterodyne megasonic piezoresponse force microscopy with high-frequency excitation beyond 100 MHz

arXiv

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arXiv 2020年

作者： Zeng, Qibin Wang, Hongli Huang, Qicheng Fan, Zhen Zeng, Kaiyang Department of Mechanical Engineering National University of Singapore Singapore117576 Singapore Institute for Advanced Materials South China Academy of Advanced Optoelectronics South China Normal University Guangzhou510006 China Guangdong Institute of New Materials National Engineering Laboratory for Modern Materials Surface Engineering Technology The Key Lab of Guangdong for Modern Surface Engineering Guangzhou510651 China

Piezoresponse Force Microscopy (PFM), as a powerful nanoscale characterization technique, has been extensively utilized to elucidate diverse underlying physics of ferroelectricity. However, the intensive study of conventional PFM has revealed a growing number of concerns and limitations which are largely challenging its validity and application. Herein, we developed a new advanced PFM technique, named Heterodyne Megasonic Piezoresponse Force Microscopy (HM-PFM), which uniquely uses 106 to 108 Hz high-frequency excitation and heterodyne method to measure the piezoelectric strain at nanoscale. We report that HM-PFM can unambiguously provide standard ferroelectric domain and hysteresis loop measurements, and an effective domain characterization with excitation frequency up to ~110 MHz has been realized. Most importantly, owing to the high-frequency and heterodyne scheme, the contributions from both electrostatic force and electrochemical strain can be significantly minimized in HM-PFM. Furthermore, a special difference-frequency piezoresponse frequency spectrum (DFPFS) measurement is developed on HM-PFM and a distinct DFPFS characteristic is observed on the materials with piezoelectricity. It is believed that HM-PFM can be an excellent candidate for the piezoelectric or ferroelectric studies where the conventional PFM results are highly controversial. Copyright © 2020, The Authors. All rights reserved.

关键词： Scanning probe microscopy

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Topological phase transition in Sb-doped Mg3Bi2 monocrystalline thin films

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Physical Review B 2021年第12期103卷 125405-125405页

作者： Tong Zhou Mingyu Tong Yun Zhang Xiangnan Xie Zhen-Yu Wang Tian Jiang Xie-Gang Zhu Xin-Chun Lai Science and Technology on Surface Physics and Chemistry Laboratory Jiangyou 621908 Sichuan People's Republic of China State Key Laboratory of High Performance Computing College of Computer National University of Defense Technology Changsha 410073 People's Republic of China Beijing Institute for Advanced Study National University of Defense Technology Beijing 100020 People's Republic of China Institute of Materials China Academy of Engineering Physics Mianyang 621700 Sichuan People's Republic of China College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha 410073 People's Republic of China National Innovation Institute of Defense Technology Academy of Military Sciences PLA China Beijing 100010 People's Republic of China Beijing Academy of Quantum Information Sciences Beijing 100193 People's Republic of China

Mg3Bi2 has been proved to be a semimetal with topological surface states (referred to as a topological semimetal, TSM) in the presence of spin-orbit coupling (SOC), and predicted to be a type-II nodal line semimetal (NSM) in the absence of SOC. It is possible to tune the effective SOC in Mg3Bi2 by substituting the heavy Bi atom with lighter atoms, such as Sb or As, which results in topological phase transitions. Here in our work we investigate the evolution of the transport properties and band structures of Mg3Bi2 by doping different concentrations of Sb through molecular beam epitaxy. Our results demonstrate the existence of phase transitions of TSM to trivial semimetal (SM) and SM to trivial insulator, with Sb concentration x at x1≈0.44–0.64 and x2≈1.39, respectively. Further theoretical calculations give values of x1≈0.523 and x2≈1.10, which agrees well with our experimental results. And all these results are concluded into a Mg3Bi2−xSbx phase diagram. Our work will stimulate more explorations to the possibilities of the realization of type-II NSM in Mg3Bi2 by various elements substitution.

关键词： surface states Topological materials Topological phase transition Weak antilocalization Angle-resolved photoemission spectroscopy

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Probing disorder-induced time-reversal symmetry breaking in Josephson junctions

arXiv

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arXiv 2024年

作者： Wu, Yu Huang, Daiqiang Zhang, Huanyu Guarino, Anita Fittipaldi, Rosalba Ma, Chao Hu, Wenjie Niu, Chang Wang, Zhen Yu, Weichao Yerin, Yuriy Vecchione, Antonio Liu, Yang Cuoco, Mario Guo, Hangwen Shen, Jian State Key Laboratory of Surface Physics Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai200433 China Department of Physics Fudan University Shanghai200433 China International Center for Quantum Materials Peking University Beijing100871 China FiscianoI-84084 Italy College of Materials Science and Engineering Hunan University Changsha410082 China Department of Physics University of Science and Technology of China Anhui Hefei230026 China Zhangjiang Fudan International Innovation Center Fudan University Shanghai201210 China CNR-SPIN via del Fosso del Cavaliere 100 Roma00133 Italy Shanghai Research Center for Quantum Sciences Shanghai201315 China Collaborative Innovation Center of Advanced Microstructures Nanjing210093 China

The relation between superconductivity and time-reversal symmetry (TRS) is one of the most fascinating problems in condensed matter physics. Although most superconductors inherently possess TRS, nonmagnetic disorder can induce states that demonstrate the breaking of this symmetry. Yet, the identification of experimental signatures of superconductivity with broken TRS remains a challenge. Here, we fabricate vertical Josephson junctions using metallic superconductor (Al) and ion bombarded Sr2RuO4 to study disorder-driven TRS breaking effects. We observe persistent magneto-resistive hysteresis behavior dependent on the disorder deposition time that provides evidence of TRS breaking below the superconducting transition temperature. Field and temperature dependent measurements suggest that the observed effects arise from disorder-induced anomalous flux in Sr2RuO4 surface which can be sensitively detected by superconducting Al. Our experimental results can be accounted within a physical framework of disorder-induced reconstruction of the superconducting order parameter as described within a multiband Ginzburg-Landau approach. © 2024, CC BY-NC-SA.

关键词： Ruthenium compounds

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Experimental preparation of topologically ordered states via adiabatic evolution

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Science China(Physics,Mechanics & Astronomy) 2019年第8期62卷 39-45页

作者： ZhiHuang Luo Jun Li ZhaoKai Li Ling-Yan Hung Yi Dun Wan XinHua Peng JiangFeng Du Beijing Computational Science Research Center CAS Key Laboratory of Microscale Magnetic Resonance and Department of Modern Physics University of Science and Technology of China Department of Physics and Institute for Quantum Science and Engineering Southern University of Science and Technology State Key Laboratory of Surface Physics and Department of Physics Fudan University Department of Physics and Center for Field Theory and Particle Physics Fudan University Collaborative Innovation Center of Advanced Microstructures Nanjing University Perimeter Institute for Theoretical Physics Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of China

Topological orders are a class of exotic states of matter characterized by patterns of long-range entanglement. Certain topologically ordered systems are proposed as potential realization of fault-tolerant quantum computation. Topological orders can arise in two-dimensional spin-lattice models. In this paper, we engineer a time-dependent Hamiltonian to prepare a topologically ordered state through adiabatic evolution. The other sectors in the degenerate ground-state space of the model are obtained by applying nontrivial operations corresponding to closed string operators. Each sector is highly entangled, as shown from the completely reconstructed density matrices. This paves the way towards exploring the properties of topological orders and the application of topological orders in topological quantum memory.

关键词： topologically ordered state adiabatic evolution nuclear magnetic resonance

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Polarization transport in ferroelectrics

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Physical Review Applied 2023年第5期20卷 050501-050501页

作者： G.E.W. Bauer P. Tang R. Iguchi J. Xiao K. Shen Z. Zhong T. Yu S.M. Rezende J.P. Heremans K. Uchida WPI Advanced Institute for Materials Research and CSIS Tohoku University 2-1-1 Katahira Sendai 980-8577 Japan Institute for Materials Research Tohoku University 2-1-1 Katahira Sendai 980-8577 Japan Kavli Institute for Theoretical Sciences University of the Chinese Academy of Sciences Beijing 10090 China National Institute for Materials Science Tsukuba 305-0047 Japan Department of Physics and State Key Laboratory of Surface Physics Fudan University Shanghai 200433 China Center for Advanced Quantum Studies and Department of Physics Beijing Normal University Beijing 100875 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China China Center of Materials Science and Optoelectronics Engineering University of the Chinese Academy of Sciences Beijing 100049 China School of Physics Huazhong University of Science and Technology Wuhan 430074 China Departamento de Física Universidade Federal de Pernambuco Recife Pernambuco 50670-901 Brazil Department of Materials Science and Engineering The Ohio State University Columbus Ohio 43210 USA Department of Mechanical and Aerospace Engineering The Ohio State University Columbus Ohio 43210 USA Department of Physics The Ohio State University Columbus Ohio 43210 USA

The duality between electric and magnetic dipoles in electromagnetism only partly applies to condensed matter. In particular, the elementary excitations of the magnetic and ferroelectric orders, namely magnons and ferrons, respectively, have received asymmetric attention from the condensed matter community in the past. In this Perspective, we introduce and summarize the current state of the budding field of “ferronics.” We argue that the introduction of dipole-carrying elementary excitations allows the modeling of many observables and potentially leads to applications in thermal, information, and communication technologies.

关键词： Electric polarization Ferroelectricity Magnons Phonons Quasiparticles & collective excitations Transport phenomena Devices Ferroelectrics

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Permafrost‒vegetation controls on water availability over the Qinghai‒Tibet Plateau

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Advances in Climate Change Research 2025年

作者： Fang Ji Lin-Feng Fan Shan-Shui Yuan Xing-Xing Kuang Liu-Jun Zhu Jun-Liang Jin Ying-Ying Yao Jian-Yun Zhang Chun-Miao Zheng The National Key Laboratory of Water Disaster Prevention Hohai University Nanjing 210024 China Yangtze Institute for Conservation and Development Hohai University Nanjing 210024 China Key Laboratory of Mountain Hazards and Engineering Resilience Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610213 China Key Laboratory of Hydrologic-Cycle and Hydrodynamic-System of Ministry of Water Resources Hohai University Nanjing 210024 China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 China Department of Earth and Environmental Science School of Human Settlements and Civil Engineering Xi’an Jiaotong University Xi’an 710049 China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research Institute Nanjing 210029 China Eastern Institute for Advanced Study Eastern Institute of Technology Ningbo 315200 China

Permafrost degradation substantially affects water resources within the cryosphere. It is crucial to elucidate the dynamics of water availability influenced by both permafrost degradation and climate change to fully comprehend the water cycle in cold regions, such as the Qinghai‒Tibet Plateau (QTP). While existing studies have established the hydrological consequences of permafrost degradation through altered soil hydraulics and water storage capacity, the complex interplay between thawing permafrost and vegetation dynamics—particularly their synergistic regulation of precipitation partitioning and runoff generation through root-zone water accessibility—are poorly understood, creating critical knowledge gaps in predicting long-term water availability trajectories. In this study, we explore the influence of permafrost-vegetation interactions on regional water availability on the QTP by integrating the effects of permafrost degradation on vegetation into the Budyko-Fu model. Our results reveal a consistent increase in surface runoff ( R ) of the permafrost regions from 1981 to 2100, predominantly driven by rising precipitation. However, shifts in vegetation patterns, prompted by permafrost degradation, significantly modify hydrological partitioning, leading to non-monotonic variations in the runoff to precipitation ratio ( R/P ). Notably, early-stage permafrost thaw enhances vegetation growth and evapotranspiration, which results in a decrease in R/P . Conversely, deeper permafrost thaw ( e.g ., beyond the root zone of vegetation) can lead to vegetation degradation, which subsequently reduces evapotranspiration and consequently increasing the R/P ratio. These findings underscore the pivotal role of vegetation in regulating the hydrological cycle and affecting water availability in permafrost-affected regions.

关键词： Water availability Permafrost degradation Vegetation Climate change Qinghai‒Tibet Plateau

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Modulation of Mo-Fe-C sites over mesoscale diffusion-enhanced hollow sub-micro reactors toward boosted electrochemical water oxidation

Research Square

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Research Square 2021年

作者： Gong, Feilong Liu, Mengmeng Gong, Lihua Ye, Sheng Jiang, Qike Zeng, Guang Zhang, Xiaoli Peng, Zhikun Zhang, Yonghui Fang, Shaoming Liu, Jian Key Laboratory of Surface and Interface Science and Technology of Henan Province College of Material and Chemical Engineering Zhengzhou University of Light Industry Henan Zhengzhou450001 China State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Liaoning Dalian116023 China DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process Engineering Advanced Technology Institute University of Surrey Guildford SurreyGU2 7XH United Kingdom Department of Applied Chemistry Anhui Agricultural University Hefei230036 China Henan Institutes of Advanced Technology State Centre for International Cooperation on Designer Low-Carbon & Environmental Materials School of Materials Science and Engineering Zhengzhou University Zhengzhou450001 China

Simultaneously engineering the mesoscale mass transfer and surface reactions on the electrode can promote the kinetics of oxygen evolution reaction (OER). Herein, we report the simultaneously modulation of the mesoscale diffusion and Mo-Fe-C sites formation over monodispersed hollow Fe@MoS2-C sub-micro reactors for boosted OER performance. According to finite element simulation and analysis, the hollow nanostructured MoS2-C host possessed much better mesoscale diffusion properties than its solid and yolk–shell counterparts. Notably, the sulfur vacancies and intercalated carbon in the sub-micro reactor offered a unique microenvironment for Fe anchoring on Mo-Fe-C sites. The stability and activity of the sites were revealed by theoretical calculations. The resultant Fe@MoS2-C presented an OER overpotential of 194 mV, which is much better than those of the Fe-based single-atom catalysts reported to data. Our monodispersed sub-micro reactor combined the advantage of mesoscale diffusion and single-atom sites, and it may have broad prospects for complex electrocatalytic reactions. © 2021, CC BY.

关键词： Molybdenum compounds

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m-Phenylenediammonium as a New Spacer for Dion-Jacobson Two-Dimensional Perovskites

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Journal of the American Chemical Society 2021年第31期143卷 12063-12073页

作者： Lili Gao Xiaotong Li Boubacar Traoré Yalan Zhang Junjie Fang Yu Han Jacky Even Claudine Katan Kui Zhao Shengzhong Liu Mercouri G Kanatzidis 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 China. Department of Chemistry Northwestern University Evanston Illinois 60208 United States. University of Rennes ENSCR INSA Rennes CNRS Institut des Sciences Chimiques de Rennes (ISCR) UMR 6226 Rennes F-35000 France. University of Rennes INSA Rennes CNRS Institut FOTON UMR 6082 Rennes F-35000 France. Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China. University of the Chinese Academy of Sciences Beijing 100039 China.

Two-dimensional (2D) halide perovskites have several distinct structural classes and exhibit great tunability, stability, and high potential for photovoltaic applications. Here, we report a new series of hybrid 2D perovskites in the Dion-Jacobson (DJ) class based on aromatic -phenylenediammonium (mPDA) dications. The crystal structures of the DJ perovskite materials (mPDA)MAPbI ( = 1-3) were solved and refined using single-crystal X-ray crystallography. The results indicate a short I···I interlayer distance of 4.00-4.04 Å for the (mPDA)MAPbI ( = 2 and 3) structures, which is the shortest among DJ perovskites. However, Pb-I-Pb angles are as small as 158-160°, reflecting the large distortion of the inorganic framework, which results in larger band gaps for these materials than those in other DJ analogues. Density functional theory calculations suggest appreciable dispersion in the stacking direction, unlike the band structures of the Ruddlesden-Popper phases, which exhibit flat bands along the stacking direction. This is a consequence of the short interlayer I···I distances that can lead to interlayer electronic coupling across the layers. The solution-deposited films (nominal (mPDA)MAPbI compositions of = 1-6) reveal improved surface coverage with increasing nominal value with the higher films being composed of a mixture of = 1 and bulk three-dimensional MAPbI perovskites. The films made from solutions of these materials behave differently from those of other 2D iodide perovskites, and their solar cells have a mixture of = 1 DJ and MAPbI as light-absorbing semiconductors.

关键词： Chemical structure Electrical conductivity Layers Cations Perovskites

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