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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Walden, D. Chakraborty, D. Cheng, J. Straksys, A. Stirke, A. Melo, W.C.M.A. Jukna, A. Komissarov, I. Sobolewski, Roman Department of Physics and Astronomy University of Rochester RochesterNY14627 United States Laboratory for Laser Energetics University of Rochester RochesterNY14623-1299 United States Materials Science Graduate Program University of Rochester RochesterNY14627 United States State Research Institute Center for Physical Sciences & Technology Vilnius Lithuania Department of Physics Vilnius Gediminas Technical University Vilnius Lithuania Department of Electrical and Computer Engineering University of Rochester RochesterNY14627 United States

A novel method has been developed to evaluate the water diffusion dynamics in gelatin-based gels, based on transient terahertz time-domain spectroscopy measurements. Such gels are widely used models for human skin. &#... 详细信息

关键词： Terahertz spectroscopy

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Assembly of an Elastic & Sticky Interfacial Layer for Sulfide-Based All-solid-state Batteries

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SSRN 2023年

作者： Su, Yu Liu, Xiangsi Yan, Hao Zhao, Jun Cheng, Yong Luo, Yu Gu, Jiabao Zhong, Haoyue Fu, Ang Wang, Kangjun Wang, Mingsheng Huang, Jianyu Yan, Jiawei Yang, Yong State Key Laboratory for Physical Chemistry of Solid Surface Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China Pen-Tung Sah Institute of Micro-Nano Science and Technology College of Materials Xiamen University Xiamen361005 China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao066004 China

All-solid-state lithium-ion batteries (ASSLBs) have recently attracted significant attention, however, two major degradation processes at the composite cathode interface in ASSLBs, including side electro-chemical reactions and morphological/structural degradation, still hinder their development seriously. To overcome the above two challenges simultaneously, we propose and demonstrate a successful assembly of an elastic & sticky interfacial layer for ASSLBs by using advanced molecular layer deposition (MLD) technique. Our spectroscopic and mechanical characterization results show that the elastic and sticky Al-GL coating layer (Young’s modulus = 0.17GPa, k = 3.300 N m-1) not only suppresses interfacial side reactions, but also enables single-crystal NCM811 particles to be in close contact with the sulfide electrolyte tightly during repeated cycles. Compared to the irreversible interfacial resistance (51.74 Ω cm-2) formed between bare NCM811 and solid electrolyte during the initial charge progress, the irreversible resistance becomes much less (11.77 Ω cm-2) after Al-GL modification. Therefore, it not only shows a capacity retention of 88.0 % of the composite electrode, which is nearly 30 % higher than bare NCM811 (59.9 %) for 100 cycles at 0.2C (1C =180 mA g-1) with a mass loading of 10.2 mg cm-2 at 30 °C. Furthermore, even with a mass loading of 20.4 mg cm-2 at 60 °C, the capacity retention of 80.0 % is obtained after 1000 cycles at 1C. This work highlights the critical role of elastic and sticky coatings in maintaining the electrochemical-mechanical integrity of composite cathode materials and provides a promising avenue for developing mechanically reliable cathode materials for ASSLBs. © 2023, The Authors. All rights reserved.

关键词： solid electrolytes

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Fast Growth of Cspbbr3 Single Crystal with High Quality by a Modified Solvent-Evaporation Method

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SSRN 2023年

作者： Yu, Changzhi Zhang, Tianqi Zhou, Quan Chen, Guolong Fan, Xiaotong Wang, Shuli Zhong, Chenming Chen, Yihang Wu, Tingzhu Chen, Zhong Xiao, Jiawen Lin, Yue Department of Electronic Science Fujian Engineering Research Center for Solid-State Lighting Xiamen University Xiamen361005 Fujian China Beijing Key Lab of Microstructure and Property of Advanced Materials Faculty of Materials and Manufacturing Beijing University of Technology Beijing100124 China Xiamen361005 Fujian China

Metal halide perovskite single crystal (SC) has attracted wide attention in the field of photoelectric detection. All-inorganic perovskite SCs are much more stable than the hybrid counterparts, but its rapid fabrications usually end up low quality. We proposed a modified solvent-evaporation method that can rapidly obtain smooth and transparent high-quality CsPbBr3 single crystal with a surface roughness of only 5 nm in a few hours. In this method, the lattice phase of the SC and the growth rate is precisely controlled by the solution temperature, which is raised to the narrow range above the cubic-to-tetragonal phase transition temperature. This precisely controlled solvent temperature allows the CsPbBr3 SC growing immediately into cubic phase, and limits the volatilization rate of solvent, thus inhibiting the defect density. The SCs grown this way are of high crystallinity, as the half-height width of the (100) and (200) peaks of XRD rocking curve is 0.0154° and 0.0176°, respectively. Characterization of photoelectric properties shows great potential for applications in X-ray detection and photo detection. © 2023, The Authors. All rights reserved.

关键词： Single crystals

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Gate-tuned ambipolar superconductivity with strong pairing interaction in intrinsic gapped monolayer 1T'-MoTe2

arXiv

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arXiv 2023年

作者： Tang, Fangdong Wang, Peipei Gan, Yuan Lyu, Jian Wang, Qixing Mi, Xinrun He, Mingquan Zhang, Liyuan Smet, Jurgen H. Max Planck Institute for Solid State Research Stuttgart70569 Germany Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Shenzhen518055 China Low Temperature Physics Laboratory College of Physics Center of Quantum Materials and Devices Chongqing University Chongqing401331 China

Gate tunable two-dimensional (2D) superconductors offer significant advantages when studying superconducting phase transitions. Here, we address superconductivity in exfoliated 1T’-MoTe2 monolayers with an intrinsic band gap of ~7.3 meV using electrostatic doping. Despite large differences in the dispersion of the conduction and the valence bands, superconductivity can be achieved easily for both electrons and holes. The onset of superconductivity occurs near 7-8K for both charge carrier types. This temperature is much higher than in bulk samples. Also the in-plane upper critical field is strongly enhanced and exceeds the BCS Pauli limit in both cases. Gap information is extracted using point-contact spectroscopy. The gap ratio exceeds multiple times the value expected for BCS weak-coupling. All these observations suggest a strong enhancement of the pairing interaction. Copyright © 2023, The Authors. All rights reserved.

关键词： Monolayers

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Atomic Layer Deposited Sno2/Zno Composite Thin Film Sensors with Enhanced Hydrogen Sensing Performance

SSRN

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SSRN 2023年

作者： Zhang, Xin-Yue Ren, Qiang Zhu, Lin Ding, Wen-Juan Cao, Yan-Qiang Li, Wei-Ming Wu, Di Li, Ai-Dong National Laboratory of Solid State Microstructures Materials Science and Engineering Department College of Engineering and Applied Sciences Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing210093 China Jiangsu Leadmicro Nano-Technology Co. Ltd. Jiangsu Wuxi China Institute of Micro-nano Photonic & Beam Steering School of Science Nanjing University of Science and Technology Nanjing210094 China

Hydrogen has long been regarded as a clean and renewable energy carrier alternative to the fossil fuel, the development of highly sensitive and reliable hydrogen sensor is imperative for the large-scale implementation of green energy hydrogen. In this work, SnO2, ZnO and SnO2/ZnO composite thin film H2 sensors were fabricated on SiO2/Si substrates by atomic layer deposition. The effect of ALD cycles and heat treatment temperatures on the sensing properties of the thin film sensors was investigated deeply. It is found that the 100-cycle SnO2/150-cycle ZnO composite film shows the best H2-sensing performance such as large response of 93 to 30 ppm H2 at 200 °C, fast response/recovery time of 50 s/29 s, and low detection limit of 250 ppb. The response of SnO2/ZnO composite film sensor is 10 times and 2 times higher than that of the pure ZnO and SnO2 thin film ones at working temperature of 200°C, respectively. A possible mechanism for performance improvement of the SnO2/ZnO composite film H2 sensor is proposed, attributed to the synergistic effect of the SnO2-ZnO heterojunction and the oxygen vacancies in the SnO2 film. ALD may be a feasible strategy to construct Si-based highly sensitive hydrogen sensors for micro-electromechanical system application. © 2023, The Authors. All rights reserved.

关键词： Atomic layer deposition

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Diversity of structural phases in AGeX3 halides

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Physical Review B 2022年第2期106卷 024112-024112页

作者： Yaorong Luo Hao Tian Xu Li Lan Chen Yurong Yang Di Wu National Laboratory of Solid State Microstructures and Collaborative Innovation Center of Advanced Microstructures Department of Materials Science and Engineering Nanjing University Nanjing 210093 China Jiangsu Key Laboratory of Artificial Functional Materials Nanjing University Nanjing 210093 China School of Physics and Electronic Engineering Zhengzhou Normal University Zhengzhou 450044 China

Utilizing first-principles and particle swarm optimization methods, we performed a systematic investigation of crystal structural stability and electrical properties of AGeX3 compounds (A=Li,Na,K,Rb,Cs;X=F,Cl,Br,I). Our work not only found the perovskite phases, but also discovered the post-perovskite, post-post-perovskite, and octahedra face-sharing structure phases, which are usually stable under high pressure, large strain, or exist in the inorganic–organic compound. These diverse structural phases provide abundant and promising properties. One striking phase is the P212121 perovskite in KGeCl3 and KGeBr3, which possesses intrinsic small polar vortices and antivortices that may lead to a gyrotropic phase transition. The ferroelectric phase of R3c (LiGeX3, NaGeX3), R3m (CsGeX3) and Pna21 (KGeX3, RbGeX3) were also found. The new Pna21 phase possesses both proper and hybrid improper polarization, and the latter is evidenced by two original energetic couplings: one coupling polarization with the antipolar distortion from Ge atoms and antipolar distortion from A-site atoms, and another coupling polarization with out-of-phase halide octahedral tilting, in-phase halide octahedral tilting, and antipolar distortion from Ge atoms. The diverse structural phases and electrical properties make Ge-based halide a promising ABX3 structure family in ferroics and piezoelectrics.

关键词： Crystal structure Ferroelectricity Crystal structures Ferroelectrics Perovskites First-principles calculations High-throughput calculations

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LiOH: A "double-edged" effect toward electrochemical oxidation of Li_(2)O_(2)

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Journal of Energy Chemistry 2021年第6期30卷 401-405,I0010页

作者： Qinghua Cui Lipo Ma Peng Zhang Yuliang Cao Jiawei Wang Laboratory of Advanced Spectro-electrochemistry and Lithium-ion Batteries Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022JilinChina Department of Materials Science&Engineering Academy for Advanced Interdisciplinary StudiesShenzhen Key Laboratory of Solid State BatteriesGuangdong Provincial Key Laboratory of Energy Materials for Electric PowerSouthern University of Science and TechnologyShenzhen 518055GuangdongChina College of Chemistry and Molecular Sciences Engineering Research Center of Organosilicon Compounds&Materials of Ministry of EducationWuhan UniversityWuhan 430072HubeiChina Institute of Materials Engineering Beijing Institute of Collaborative InnovationBeijing 100094China

The aprotic lithium-oxygen battery(Li-O_(2) battery) has attracted much attraction for the future advanced battery technologies due to its ultra-high theoretical energy density that can well meet the ever-growing ener... 详细信息

关键词： Lithium-oxygen batteries LiOH-doped Li_(2)O_(2) Li_(2)O_(2)oxidation Differential electrochemical mass spectrometer Isotope-labelling

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Terahertz technology in intraoperative neurodiagnostics:A review

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Opto-Electronic Advances 2023年第5期6卷 41-67页

作者： Nikita V.Chernomyrdin Guzel R.Musina Pavel V.Nikitin Irina N.Dolganova Anna S.Kucheryavenko Anna I.Alekseeva Yuye Wang Degang Xu Qiwu Shi Valery V.Tuchin Kirill I.Zaytsev Prokhorov General Physics Institute of the Russian Academy of Sciences Moscow 119991Russia Bauman Moscow State Technical University Moscow 105005Russia Institute for Regenerative Medicine Sechenov UniversityMoscow 119991Russia Institute of Solid State Physics of the Russian Academy of Sciences Chernogolovka 142432Russia Research Institute of Human Morphology Moscow 117418Russia School of Precision Instrument and Optoelectronic Engineering Tianjin UniversityTianjin 300000China College of Materials Science and Engineering Sichuan UniversityChengdu 610000China Science Medical Center Saratov State UniversitySaratov 410012Russia Institute of Precision Mechanics and Control FRC"Saratov Scientific Centre of the Russian Academy of Sciences"Saratov 410028Russia

Terahertz(THz)technology offers novel opportunities in biology and medicine,thanks to the unique features of THzwave interactions with tissues and *** them,we particularly notice strong sensitivity of THz waves to the tissue water,as a medium for biochemical reactions and a main endogenous marker for THz spectroscopy and *** of the brain have an exceptionally high content of *** factor,along with the features of the structural organization and biochemistry of neuronal and glial tissues,makes the brain an exciting subject to study in the THz *** this paper,progress and prospects of THz technology in neurodiagnostics are overviewed,including diagnosis of neurodegenerative disease,myelin deficit,tumors of the central nervous system(with an emphasis on brain gliomas),and traumatic brain *** and applied challenges in study of the THz-wave–brain tissue interactions and development of the THz biomedical tools and systems for neurodiagnostics are discussed.

关键词： THz technology THz spectroscopy and imaging superresolution imaging biophotonics brain neurodiagnosis tumor glioma neurodegenerative diseases brain injury light scattering

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Mitigating Fast Thermal Instability by Engineered Laser Sweep in AIN Soliton Microcomb Generation

Mitigating Fast Thermal Instability by Engineered Laser Swee...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Zihao Wang Kewei Liu Shunyu Yao Yanan Guo Jianchang Yan Junxi Wang Changxi Yang Chengying Bao Department of Precision Instruments State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing China Center for Materials Science and Optoelectronics Engineering University of the Chinese Academy of Sciences Beijing China Research and Development Center for Solid State Lighting Institute of Semiconductors Chinese Academy of Sciences Beijing China

Transient thermal instability represents a significant challenge in generating soliton microcombs. Fast laser sweep can be an efficient method to mitigate thermal instability, but it would require ultrahigh laser sweep rate for crystalline microresonators with fast thermal relaxation. Here, we engineer the laser sweep waveform to generate AIN-on-sapphire soliton microcombs with an intermediate sweep speed $(< 30\text{GHz}/\mu \mathrm{s})$ . Two laser sweep methods with a backward + forward tuning or a two-step backward tuning added after the fast forward laser sweep are demonstrated to stabilize solitons.

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Evidence for Magnetic Fractional Excitations in a Kitaev Quantum-Spin-Liquid Candidate α-RuCl_(3)

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Chinese Physics Letters 2022年第2期39卷 72-77页

作者： Kejing Ran Jinghui Wang Song Bao Zhengwei Cai Yanyan Shangguan Zhen Ma Wei Wang Zhao-Yang Dong P.Cermak A.Schneidewind Siqin Meng Zhilun Lu Shun-Li Yu Jian-Xin Li Jinsheng Wen School of Physical Science and Technology and ShanghaiTech Laboratory for Topological PhysicsShanghaiTech UniversityShanghai 200031China National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityNanjing 210093China Institute for Advanced Materials Hubei Normal UniversityHuangshi 435002China School of Science Nanjing University of Posts and TelecommunicationsNanjing 210023China Department of Applied Physics Nanjing University of Science and TechnologyNanjing 210094China Julich Centre for Neutron Science(JCNS)at Heinz Maier-Leibnitz Zentrum(MLZ) Forschungszentrum Jülich GmbHLichtenbergstr.185748 GarchingGermany Charles University Faculty of Mathematics and PhysicsDepartment of Condensed Matter PhysicsKe Karlovu 512116PrahaCzech Republic Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH Hahn-Meitner-Platz 1D-14109BerlinGermany China Institute of Atomic Energy(CIAE) Beijing 102413China The Henry Royce Institute and Department of Materials Science and Engineering The University of SheffieldSir Robert Hadfield BuildingSheffieldS13JDUnited Kingdom Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

It is known that α-RuCl_(3) has been studied extensively because of its proximity to the Kitaev quantum-spin-liquid(QSL)phase and the possibility of approaching it by tuning the competing *** we present the first polarized inelastic neutron scattering study on α-RuCl_(3) single crystals to explore the scattering continuum around the Γ point at the Brillouin zone center,which was hypothesized to be resulting from the Kitaev QSL state but without concrete *** polarization analyses,we find that,while the spin-wave excitations around the Γ point vanish above the transition temperature T_(N),the pure magnetic continuous excitations around the Γ point are robust against ***,by calculating the dynamical spin-spin correlation function using the cluster perturbation theory,we derive magnetic dispersion spectra based on the K-Γ model,which involves with a ferromagnetic Kitaev interaction of −7.2 meV and an off-diagonal interaction of 5.6 *** find this model can reproduce not only the spin-wave excitation spectra around the Γ point,but also the non-spin-wave continuous magnetic excitations around the Γ *** results provide evidence for the existence of fractional excitations around the Γ point originating from the Kitaev QSL state,and further support the validity of the K-Γ model as the effective minimal spin model to describe α-RuCl_(3).

关键词： temperature excitation diagonal

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