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Electrical control of excitonic oscillator strength and spatial distribution in a monolayer semiconductor

Nano Research 2024年第9期17卷 8424-8430页

作者： Yanming Wang Junrong Zhang Tianhua Ren Meng Xia Long Fang Xiangyi Wang Xingwang Zhang Kai Zhang Junyong Wang School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026China CAS Key Laboratory of Nanophotonic Materials and Devices&Key Laboratory of Nanodevices and Applications i-LabSuzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou 215123China Institute of Applied Physics and Materials Engineering University of MacaoTaipaMacao 999078China College of New Energy Inner Mongolia University of TechnologyHohhot 010051China

Electrical modulation of luminescence is significant to modern light-emitting *** transition metal dichalcogenides are emerging direct-bandgap luminescent materials with unique excitonic properties,and the multiple exciton complexes provide new opportunities to modulate the property of luminescence in atomically thin ***,we report an electrical control of exciton emission in the oscillator strength and spatial distribution of excitons in a monolayer *** modulation of excitonic emission intensity with a degree of modulation of~92%has been demonstrated by an electric field at room *** spatial carrier redistribution tuned by a lateral electric field results in distinct excitonic emission patterns by *** modulation approach to exciton oscillator strength and distribution provides an efficient way to investigate the exciton diffusion dynamics and to construct electrically tunable optoelectronic devices.

关键词： monolayer semiconductor exciton electrical modulation spatial distribution

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Seed-assisted growth for high-performance perovskite solar cells:A review

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Journal of Energy Chemistry 2024年第9期96卷 588-610页

作者： Zhimin Fang Ting Nie Jianning Ding Shengzhong(Frank)Liu Institute of Technology for Carbon Neutralization Yangzhou UniversityYangzhou 225127JiangsuChina Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an 710119ShaanxiChina

The rapid increase in the power conversion efficiency(PCE)of perovskite solar cells(PSCs)is closely related to the development of deposition techinique for perovskite *** high-quality perovskite film enables efficient charge transportation and less trap states,which are eventually translated into enhanced device ***-assisted growth(SAG)is a potential technique for depositing highly-crystallized perovskite films with preferential crystal orientation among the numerous approaches related to crystallization *** this review,we summarize the recent advances in the SAG technique for both one-step and two-step processed perovskite ***,seeding at the buried interface and on the top surface are also *** present different seeds and their corresponding seeding mechanism in detail,such as inorganic nanomaterials,organic ammoniums,alkali metal halides,and perovskite ***,challenges and perspectives are proposed to investigate the potential expansion of seeding engineering in high-performance PSCs,particularly large-area devices.

关键词： Perovskite solar cell Seed Crystallization Efficiency

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A Non-conventional Patch-Based Shared Aperture Antenna with Parasitic Element for L/S Band 2nd

A Non-conventional Patch-Based Shared Aperture Antenna with ...

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Emergent Converging Technologies and Biomedical Systems Select Proceedings of the 2nd International Conference, ETBS 2022

作者： Dhiman, Jonny Khah, Sunil Kumar Electromagnetic Analysis Lab Department of Physics and Materials Science Jaypee University of Information Technology Distt. Waknaghat HP Solan173234 India

ISBN: (纸本)9789819922703

Advanced communication systems require antennas utilising the common aperture to provide multi-functions in different frequency band. We report design of antenna elements using shared aperture for L and S bands with a frequency ratio of 1.6:3.9. The performance of the design is enhanced by length optimised parasitic strip of L shape etched on the corner of the antenna surface. The antenna configuration shows good corroboration between the simulated and measured results. The designed antennas exhibit a return loss of less than −25 dB and VSWR less than 1.1 for respective resonant frequencies. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Microstrip antennas

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Nano-plasmonic graphene-quantum dots integrated photoelectronic biosensor

Nano-plasmonic graphene-quantum dots integrated photoelectro...

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2023 Opto-Electronics and Communications Conference, OECC 2023

作者： Sun, Jiaxing Zhou, Lin Mao, Hongju Zhao, Jianlong Chen, Xianfeng Nottingham Trent University School of Science and Technology Department of Physics Nottingham United Kingdom Shanghai Institute of Microsystem and Information Technology State Key Lab of Transducer Tech Chinese Academy of Sciences China

ISBN: (纸本)9781665462136

We report a nano-plasmonic biosensor with integrated optoelectronic architecture developed on a miniaturized chip. With simple means, the nano-plasmonic sensor demonstrated the capability to record the selective and specific binding of proteins to the bioreceptors immobilized on gold nanoparticles arrays placed directly on a photoconductive graphene-Perovskite quantum dots hybrid channel. The distinct combination of the nano-plasmonic structure, proteins and hybrid two-dimensional materials endowed the photoelectronic detection of biotin with advantages of label-free, ultrahigh sensitivity and rapid speed. © 2023 IEEE.

关键词： Biosensors

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Two-dimensional Parameter Relationships for W UMa-type Systems Revisited

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Research in Astronomy and Astrophysics 2024年第1期24卷 51-58页

作者： Atila Poro Ehsan Paki Ailar Alizadehsabegh Mehdi Khodadadilori Selda Ranjbar Salehian Mahya Hedayatjoo Fatemeh Hashemi Yasaman Dashti Fatemeh Mohammadizadeh Astronomy Department of the Raderon AI Lab. BurnabyBCCanada Faculty of Electrical and Computer Engineering Department of PhotonicsUniversity of TabrizTabriz 51664Iran Department of Electrical Engineering Amirkabir University of TechnologyTehranIran Astronomy Students'Scientific Association University of TabrizTabriz 51664Iran Department of Physics Iran University of Science and TechnologyTehranIran Institute for the Intellectual Development(Kanoon) Astronomy GroupBojnordIran Department of Mechanical Engineering Amirkabir University of TechnologyTehranIran Aerospace Engineering Department Science and Research Branch of Islamic Azad UniversityTehranIran

Reviewing the empirical and theoretical parameter relationships between various parameters is a good way to understand more about contact binary *** this investigation,two-dimensional(2D)relationships for P–MV(system),P–L1,2,M1,2–L1,2,and q–Lratiowere *** sample used is related to 118 contact binary systems with an orbital period shorter than 0.6 days whose absolute parameters were estimated based on the Gaia Data Release 3 *** reviewed previous studies on 2D relationships and updated six parameter ***,Markov chain Monte Carlo and Machine Learning methods were used,and the outcomes were *** selected 22 contact binary systems from eight previous studies for comparison,which had light curve solutions using spectroscopic *** results show that the systems are in good agreement with the results of this study.

关键词： (stars:)binaries(including multiple):close stars:fundamental parameters methods:data analysis

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High Mixing Entropy Enhanced Energy States in Metallic Glasses

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Chinese physics Letters 2022年第4期39卷 36-40页

作者： Juntao Huo Kangyuan Li Bowen Zang Meng Gao Li-Min Wang Baoan Sun Maozhi Li Lijian Song Jun-Qiang Wang Wei-Hua Wang CAS Key Laboratory of Magnetic Materials and Devices and Zhejiang Province Key Laboratory of Magnetic Materials and Application TechnologyNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Department of Physics Renmin University of ChinaBeijing 100872China State Key Lab of Metastable Materials Science and Technology and College of Materials Science and EngineeringYanshan UniversityQinhuangdao 066004China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Owing to the nonequilibrium nature,the energy state of metallic glasses(MGs)can vary a lot and has a critical influence on the physical *** new methods to modulate the energy state of glasses and studying its relationship with properties have attracted great ***,we systematically investigate the energy state,mixing entropy and physical properties of Zr–Ti–Cu–Ni–Be multicomponent high entropy MGs by experiments and *** find that the energy state increases along with the increase of mixing *** yield strength and thermal stability of MGs are also enhanced by high mixing *** results may open a new door on regulation of energy states and thus physical properties of MGs.

关键词： properties glasses mixing

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Zero sample image anomaly detection guided by multi-modal prompts 9

Zero sample image anomaly detection guided by multi-modal pr...

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9th International Conference on Intelligent Informatics and BioMedical sciences, ICIIBMS 2024

作者： Wang, Jinhong Xu, Xinying Xie, Gang Wang, Kai Yuan, Xiaohu Taiyuan University of Technology College of Electrical and Power Engineering Taiyuan China Taiyuan University of Science and Technology School of Electronic Information Engineering Taiyuan China YanTai University School of Physics and Electronic Information Yantai China Qiyuan Lab Beijing China

ISBN: (纸本)9798350363043

Large visual language models such as CLIP show strong zero sample recognition capability in anomaly detection tasks. It learns object-independent prompts through the guidance of prompt engineering, fine-tunes CLIP to anomaly detection tasks, and shows good generalization ability. However, prompt engineering usually needs to design hundreds of prompts, which increases the difficulty of designing prompts, and can not be used well for multi-class anomaly detection. To solve these problems, this paper proposes a zero sample anomaly detection method guided by multi-modal prompt learning. By introducing multimodal prompts for text branches and visual branches, the consistency of text and visual branch representations is improved, ensuring that the two modes learn cooperatively from each other. In addition, a uniform domain-aware contrast state template is designed for fine-grained visual language matching. For imagelevel and pixel-level anomaly detection, this method achieves better performance than non-prompt learning in zero-sample anomaly detection. © 2024 IEEE.

关键词： Contrastive Learning

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Biological Tissue-Inspired Ultrasoft,Ultrathin,and Mechanically Enhanced Microfiber Composite Hydrogel for Flexible Bioelectronics

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Nano-Micro Letters 2023年第9期15卷 175-189页

作者： Qiang Gao Fuqin Sun Yue Li Lianhui Li Mengyuan Liu Shuqi Wang Yongfeng Wang Tie Li Lin Liu Simin Feng Xiaowei Wang Seema Agarwal Ting Zhang i-Lab Nano-X Vacuum Interconnected WorkstationKey Laboratory of Multifunction Nanomaterials and Smart SystemsSuzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)Suzhou 215123JiangsuPeople’s Republic of China Department of Chemistry Bavarian Center for Battery Technology(BayBatt)Bayreuth Center for Colloids and Interfacesand Bavarian Polymer InstituteMacromolecular Chemistry IIUniversity of BayreuthUniversitätsstrasse 3095440 BayreuthGermany School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026AnhuiPeople’s Republic of China Center for Excellence in Brain Science and Intelligence Technology Chinese Academy of ScienceShanghai 200031People’s Republic of China

Hydrogels offer tissue-like softness,stretchability,fracture toughness,ionic conductivity,and compatibility with biological tissues,which make them promising candidates for fabricating flexible bioelectronics.A soft hydrogel film offers an ideal interface to directly bridge thin-film electronics with the soft ***,it remains difficult to fabricate a soft hydrogel film with an ultrathin configuration and excellent mechanical *** we report a biological tissue-inspired ultrasoft microfiber composite ultrathin(<5μm)hydrogel film,which is currently the thinnest hydrogel film as far as we *** embedded microfibers endow the composite hydrogel with prominent mechanical strength(tensile stress~6 MPa)and anti-tearing ***,our microfiber composite hydrogel offers the capability of tunable mechanical properties in a broad range,allowing for matching the modulus of most biological tissues and *** incorporation of glycerol and salt ions imparts the microfiber composite hydrogel with high ionic conductivity and prominent anti-dehydration *** microfiber composite hydrogels are promising for constructing attaching-type flexible bioelectronics to monitor biosignals.

关键词： Fiber Hydrogel Flexible electronics Thin film Electrospinning

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Improving electrical,optical and radiation shielding properties of polyvinyl alcohol yttrium oxide composites

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Journal of Rare Earths 2023年第12期41卷 2002-2009,I0007页

作者： Shams A.M.Issa D.E.Abulyazied Albandari W.Alrowaily H.A.Saudi E.S.Ali A.M.A.Henaish Hesham M.H.Zakaly Department of Physics Faculty of ScienceUniversity of TabukTabukSaudi Arabia Faculty of Science Al-Azhar UniversityAssiut BranchAssiut71524Egypt Polymer Lab Department of PetrochemicalEgyptian Petroleum Research InstituteNasr CityCairoEgypt Department of Physics College of SciencePrincess Nourah Bint Abdulrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Physics Department Faculty of ScienceAl-Azhar University(Girls Branch)Nasr CityCairoEgypt Institute of Physics and Technology Ural Federal UniversityYekaterinburg620002Russia Physics Department Faculty of ScienceTanta UniversityTanta31527Egypt Istinye University Faculty of Engineering and Natural SciencesComputer Engineering DepartmentIstanbul34396Turkey

This research aims to study the impact of yttrium oxide on the radiation protection features of polyvinyl alcohol(PVA) for gamma shielding *** yttrium oxide(Y_(2)O_(3)) was instilled through the PVA matrix by different contents(x=0.1 wt%,0,3 wt%,0,7 wt%,0,9 wt%),The morphology of the prepared PVA/Y_(2)O_(3)composites was characterized using scanning electron microscopy(SEM).The samples were investigated using absorption edge,transmittance spectra and dielectric *** transmittance and the bandgap energy decrease as the Y2O3content increases while there is an increase in ε’ and ε" as well as the ac conductivity with the content increment of Y_(2)O_(3)till 0.7 wt%.The te mperature dependence of the dc conductivity was measured for all samples in the range of 260-460 K,and it increases with the temperature *** correlate the electrical characteristics of the PVA/Y_(2)O_(3)composites with their structure and evaluate electrical properties with the help of equivalent circuit matching with the experimentally electrical response in the impedance spectrum,the radiation protection properties were also investigated to get the radiation shielding performance of these PVA/Y_(2)O_(3)composite films with varying Y_(2)O(3)*** linear attenuation coefficient(μ),half value layer(T_(0.5)),and mass attenuation coefficient(μm) were *** to all obtained data,PVA/Y_(2)O_(3)composite films with various percentages(0.1 wt%,0.3 wt%,0.7 wt%,0.9 wt%) can be used as a radiation shielding material.

关键词： Yttriumoxide/PVA Electrical properties Optical properties Gamma shielding Rare earths

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Near-term quantum computing techniques: Variational quantum algorithms, error mitigation, circuit compilation, benchmarking and classical simulation

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science China(physics,Mechanics & Astronomy) 2023年第5期66卷 23-72页

作者： He-Liang Huang Xiao-Yue Xu Chu Guo Guojing Tian Shi-Jie Wei Xiaoming Sun Wan-Su Bao Gui-Lu Long Henan Key Laboratory of Quantum Information and Cryptography Zhengzhou 450000China State Key Lab of Processors Institute of Computing TechnologyChinese Academy of SciencesBeijing 100190China School of Computer Science and Technology University of Chinese Academy of SciencesBeijing 100049China Beijing Academy of Quantum Information Sciences Beijing 100193China Department of Physics Tsinghua UniversityBeijing 100084China

Quantum computing is a game-changing technology for global academia,research centers and industries including computational science,mathematics,finance,pharmaceutical,materials science,chemistry and *** it has seen a major boost in the last decade,we are still a long way from reaching the maturity of a full-fledged quantum *** said,we will be in the noisy-intermediate scale quantum(NISQ)era for a long time,working on dozens or even thousands of qubits quantum computing *** outstanding challenge,then,is to come up with an application that can reliably carry out a nontrivial task of interest on the near-term quantum devices with non-negligible quantum *** address this challenge,several near-term quantum computing techniques,including variational quantum algorithms,error mitigation,quantum circuit compilation and benchmarking protocols,have been proposed to characterize and mitigate errors,and to implement algorithms with a certain resistance to noise,so as to enhance the capabilities of near-term quantum devices and explore the boundaries of their ability to realize useful ***,the development of near-term quantum devices is inseparable from the efficient classical sim-ulation,which plays a vital role in quantum algorithm design and verification,error-tolerant verification and other *** review will provide a thorough introduction of these near-term quantum computing techniques,report on their progress,and finally discuss the future prospect of these techniques,which we hope will motivate researchers to undertake additional studies in this field.

关键词： quantum computing noisy-intermediate scale quantum variational quantum algorithms error mitigation circuit com-pilation benchmarking protocols classical simulation

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