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2nd International Conference on Trends in computational and Cognitive Engineering, TCCE 2020

作者： Sharma, M.K. Ray, K. Yupapin, P. Kaiser, M.S. Ong, C.T. Ali, J. Amity School of Engineering and Technology Amity University Rajasthan Kant Kalwar NH11-C Delhi Highway JaipurRajasthan303002 India Amity School of Applied Sciences Amity University Kant Kalwar NH11-C Delhi Highway JaipurRajasthan303002 India Computational Optics Research Group Advanced Institute of Materials Science Ton Duc Thang University District 7 Ho Chi Minh City Viet Nam Division of Computational Physics Institute for Computational Science Ton Duc Thang University Ho Chi Minh City700000 Viet Nam Institute of Information Tech. Jahangirnagar University Dhaka Bangladesh Department of Mathematical Sciences Faculty of Science Universiti Teknologi Malaysia UTM Skudai Johor Bahru81310 Malaysia Faculty of Science Institute of Advance Photonic Science Universiti Teknologi Malaysia Johor Bahru Malaysia

ISBN: (纸本)9789813346727

Epilepsy is a neurological disease that’s characterized by perennial seizures. In this neurological condition the transient electrical phenomenon within the brain occurs that produces an amendment in sensation, awareness, and behavior of an individuals that leads to risk. To understand the brain behavior Electroencephalogram (EEG) signals are used in six different sub-bands viz. Alpha (α ), Beta (β ), Gamma1 (γ 1), Gamma2 (γ 2), Theta (θ ) and Delta (δ ). The Brainstorm software is used for visualizing, analyzing and filtration of EEG signals in each sub-band. This paper deals with the extraction of the various features in each sub-bands and different Machine Learning classifiers were used on these extracted features for comparative analysis in terms of Accuracy, prediction Speed and training time in MatLab. The various statistical and spectral methods are applied on EEG signals to obtained the distinct features in each sub-band. After compared these classifiers on the performance *** have 8 best classifier trained Models that were utilized in checking effectiveness to clearly distinguish between Epileptic and Normal cases. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Electroencephalography

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A simple and efficient liposome-based biosensor for visual monitoring of Cu²⁺-bipyridine complex formation

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Microchemical Journal 2025年 214卷

作者： Tran, Vy Anh Vo, Thu Thao Thi Lee, Sang-Wha Phan, Thien-Vy Le, Van Thuan Department of Material Science Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University Ho Chi Minh City 700000 Viet Nam Department of Food Science and Biotechnology Gachon University 1342 Seongnamdaero Sujeong-gu Seongnam-si 13120 Cuba Department of Chemical and Biological Engineering Gachon University Seongnam-si 1342 Gyeonggi-do 461-701 Cuba Faculty of Pharmacy Nguyen Tat Thanh University Ho Chi Minh City 700000 Viet Nam Center for Advanced Chemistry Institute of Research and Development Duy Tan University 03 Quang Trung Da Nang 550000 Viet Nam

This study presents the development of a novel liposome-based colorimetric sensor designed for the detection of 2,2′-bipyridine (BP) and its interaction with Cu2+ ions, resulting in the formation of a dark red comple... 详细信息

This study presents the development of a novel liposome-based colorimetric sensor designed for the detection of 2,2′-bipyridine (BP) and its interaction with Cu2⁺ ions, resulting in the formation of a dark red complex visible to the naked eye. The liposomes encapsulate BP, which is released under controlled conditions. The effects of environmental factors, such as temperature, pH fluctuations, and Triton X100-induced membrane disruption, on the release dynamics are systematically analyzed. The study employs UV–vis spectroscopy to monitor the release kinetics and elucidate the mechanisms of liposome destabilization and BP-Cu2⁺ complex formation. The optimized conditions for Triton X100 and Cu2⁺ concentrations enhance the sensor's sensitivity, making it highly efficient for real-time detection. This sensor, which outperforms traditional cysteine-mediated AuNP aggregation and ligand-receptor systems, offers significant advantages in terms of simplicity, cost-effectiveness, and portability. It holds great potential for applications in environmental monitoring and medical diagnostics, providing a versatile and efficient platform for visual detection in field-deployable diagnostic tools. © 2025 Elsevier B.V.

关键词： 2,2′-Bipyridine Colorimetric detection Cu2+ interaction Liposome-based sensor Triton X100 disruption

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Au–Ag bimetallic nanoparticles: Synthesis, structure, and application in sensing

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ChemPhysMater 2025年

作者： Nene, Ajinkya Antarnusa, Ganesha Dulta, Kanika Sadeghzade, Sorour Wang, Liwen Ravikumar, Chandan Hunsur Aman, Junaid Khongthaw, Banlambhabok Kandwal, Abhishek Somani, Prakash Kumar, Ashish Ramachandran, Krishnamoorthy Subramaniam, Vadivel Galluzzi, Massimiliano Dou, Shixue Liu, Xinghui Laboratory of Inflammation and Vaccines Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China Department of Mechanics and Aerospace Engineering Southern University of Science and Technology Shenzhen 518055 China Department of Physics Education Universitas Sultan Ageng Tirtayasa Serang 42122 Indonesia Faculty of Materials Science and Technology VSB -Technical University of Ostrava Ostrava 70800 Czech Republic School of Applied and Life Sciences Uttaranchal University Dehradun 248007 India School of Engineering Westlake University Hangzhou 310023 China School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068 China Centre for Nano and Material Sciences Jain (deemed-to-be-University) Jain Global Campus Bangalore 562112 India Faculty of Applied Sciences and Biotechnology Shoolini University Solan 173229 India School of CHIPS Xi'an Jiaotong-Liverpool University Suzhou 215400 China Center for Grand Challenges and Green Technologies Applied Science Innovations Pvt. Ltd. Pune 411041 India Division of Research and Development Lovely Professional University Phagwara 144401 India Department of Physics Faculty of Engineering and Technology SRM Institute of Science and Technology Chennai 600026 India Department of Physics Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Chennai 602105 India Institute of Energy Materials Science University of Shanghai for Science and Technology Shanghai 200093 China Science and Technology on Aerospace Chemical Power Laboratory Laboratory of Emergency Safety and Rescue Technology Hubei Institute of Aerospace Chemotechnology Xiangyang 441003 China

Biosensors are crucial for detecting various analytes relevant to bioanalytical applications. To enhance the specificity and sensitivity of biosensors, bimetallic nanoparticles (BNPs) have been utilized, which demonstrate significant potential for sensing applications owing to their constituent materials’ inherent properties, small size, unique architectural features, and biomimetic behavior. Among BNPs, Au–Ag BNPs are promising for sensing applications owing to their small size, high sensitivity, and distinctive characteristics. Herein, we first briefly present the development of Au–Ag BNPs and discuss the fundamentals. Subsequently, we present the relationship between the synthesis method and structure of Au–Ag BNPs. Furthermore, recent advancements in Au–Ag BNPs are highlighted for their role in enhancing biosensors, particularly for electrode modifiers, signal amplifiers, and recognition materials. Finally, we propose several existing challenges and summarize insights pertaining to the potential development of Au–Ag BNPs for biosensing applications. © 2025 The Authors

关键词： Au–Ag bimetallic nanoparticles Biosensing Electrochemistry Synthesis

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Giant tunneling magnetoresistance induced by bias voltage in spin-filter van der Waals magnetic tunnel junctions with an interlayer antiferromagnetic semiconductor barrier

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Physical Review B 2021年第14期104卷 144423-144423页

作者： Xiaoyan Guo Baishun Yang Xiaolin Zhang Yu Zhu Xiufeng Han Yu Yan Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) Department of Physics Jilin University Changchun 130012 China Shenzhen JL Computational Science and Applied Research Institute Shenzhen 518109 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics University of Chinese Academy of Sciences Chinese Academy of Sciences Beijing 100190 China

Spin-filter van der Waals Magnetic tunnel junctions (sf-vdW MTJs) formed by an interlayer antiferromagnetic (AFM) vdW semiconductor as a barrier have exhibited promising prospects in achieving a high tunneling magnetoresistance (TMR) ratio in MTJs. Here, using first-principles calculations, we investigate the spin-dependent transport and the TMR effect of sf-vdW MTJs formed by sandwiching bilayer and trilayer NiBr2 barriers between two graphite electrodes (Gr/NiBr2/Gr sf-vdW MTJs). Similar to the experimental results of sf-vdW MTJs formed by a few-layer CrI3 barrier, the TMR ratios of the Gr/NiBr2/Gr sf-vdW MTJs increase first with the increase of bias voltage and decrease with the further increase of bias voltage after reaching the highest points because the conduction bands of the interlayer ferromagnetic (FM) NiBr2 barrier at the K points go into the bias window earlier than those of the interlayer AFM NiBr2 barrier with the increase of bias voltage. Compared to the TMR ratios of about 170% and 206% at zero bias voltage, the TMR ratios of the Gr/NiBr2/Gr sf-vdW MTJs with bilayer and trilayer NiBr2 barriers are largely increased about 34 and 67 times by the optimized bias voltage, respectively. Correspondingly, a giant TMR ratio of about 6000% and 14 000% can be achieved in the Gr/NiBr2/Gr sf-vdW MTJs with bilayer and trilayer NiBr2 barriers at 0.14 and 0.125 V bias voltage, respectively. Our results elucidate the mechanism of bias voltage induced giant TMR ratio in the Gr/NiBr2/Gr sf-vdW MTJs and provide promising routes for developing MTJs with a high TMR ratio.

关键词： Magnetic order Quantum transport Spintronics Antiferromagnets Magnetic semiconductors Magnetic tunnel junctions First-principles calculations Nonequilibrium Green's function

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Applications of engineered biochar in remediation of heavy metal(loid)s pollution from wastewater: Current perspectives toward sustainable development goals

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science of the Total Environment 2024年 926卷 171859页

作者： Tran, Thien-Khanh Huynh, Loan Nguyen, Hoang-Lam Nguyen, Minh-Ky Lin, Chitsan Hoang, Tuan-Dung Hung, Nguyen Tri Q. Nguyen, X. Hoan Chang, S. Woong Nguyen, D. Duc Advanced Applied Sciences Research Group Dong Nai Technology University Bien Hoa City76100 Viet Nam Faculty of Technology Dong Nai Technology University Bien Hoa City76100 Viet Nam Department of Civil Engineering McGill University Montreal Canada Faculty of Environment and Natural Resources Nong Lam University Hamlet 6 Linh Trung Ward Thu Duc City Ho Chi Minh City700000 Viet Nam Ph.D. Program in Maritime Science and Technology National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan Department of Marine Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung81157 Taiwan School of Chemistry and Life Science Hanoi University of Science and Technology No. 1 Dai Co Viet Hai Ba Trung Hanoi100000 Viet Nam Vietnam National University Hanoi - School of Interdisciplinary Sciences and Arts 144 Xuan Thuy Street Cau Giay District Hanoi100000 Viet Nam Ho Chi Minh City University of Industry and Trade Ho Chi Minh City Viet Nam Department of Civil & Energy System Engineering Kyonggi University Suwon16227 Korea Republic of Institute of Applied Technology and Sustainable Development Nguyen Tat Thanh University Ho Chi Minh City700000 Viet Nam

Environmental pollution of heavy metal(loid)s (HMs) caused adverse impacts, has become one of the emerging concerns and challenges worldwide. Metal(loid)s can pose significant threats to living organisms even when present in trace levels within environmental matrices. Extended exposure to these substances can lead to adverse health consequences in humans. Removing HM-contaminated water and moving toward sustainable development goals (SDGs) is critical. In this mission, biochar has recently gained attention in the environmental sector as a green and alternative material for wastewater removal. This work provides a comprehensive analysis of the remediation of typical HMs by biochars, associated with an understanding of remediation mechanisms, and gives practical solutions for ecologically sustainable. Applying engineered biochar in various fields, especially with nanoscale biochar-aided wastewater treatment approaches, can eliminate hazardous metal(loid) contaminants, highlighting an environmentally friendly and low-cost method. Surface modification of engineered biochar with nanomaterials is a potential strategy that positively influences its sorption capacity to remove contaminants. The research findings highlighted the biochars' ability to adsorb HM ions based on increased specific surface area (SSA), heightened porosity, and forming inner-sphere complexes with oxygen-rich groups. Utilizing biochar modification emerged as a viable approach for addressing lead (Pb), cadmium (Cd), arsenic (As), mercury (Hg), and chromium (Cr) pollution in aqueous environments. Most biochars investigated demonstrated a removal efficiency >90 % (Cd, As, Hg) and can reach an impressive 99 % (Pb and Cr). Furthermore, biochar and advanced engineered applications are also considered alternative solutions based on the circular economy. © 2024 Elsevier B.V.

关键词： Nanostructured materials

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Target density effects on charge tansfer of laser-accelerated carbon ions in dense plasma

arXiv

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arXiv 2022年

作者： Ren, Jieru Ma, Bubo Liu, Lirong Wei, Wenqing Chen, Benzheng Zhang, Shizheng Xu, Hao Hu, Zhongmin Li, Fangfang Wang, Xing Yin, Shuai Feng, Jianhua Zhou, Xianming Gao, Yifang Li, Yuan Shi, Xiaohua Li, Jianxing Ren, Xueguang Xu, Zhongfeng Deng, Zhigang Qi, Wei Wang, Shaoyi Fan, Quanping Cui, Bo Wang, Weiwu Yuan, Zongqiang Teng, Jian Wu, Yuchi Cao, Zhurong Zhao, Zongqing Gu, Yuqiu Cao, Leifeng Zhu, Shaoping Cheng, Rui Lei, Yu Wang, Zhao Zhou, Zexian Xiao, Guoqing Zhao, Hongwei Hoffmann, Dieter H.H. Zhou, Weimin Zhao, Yongtao MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter School of Science Xi'an Jiaotong University Xi'An710049 China Science and Technology on Plasma Physics Laboratory Laser Fusion Research Center China Academy of Engineering Physics Mianyang621900 China Advanced Materials Testing Technology Research Center Shenzhen University of Technology Shenzhen518118 China Institute of Applied Physics and Computational Mathematics Beijing100094 China Graduate School China Academy of Engineering Physics Beijing100088 China Institute of Modern Physics Chinese Academy of Sciences Lanzhou710049 China

We report on charge state measurements of laser-accelerated carbon ions in the energy range of several MeV penetrating a dense partially ionized plasma. The plasma was generated by irradiation of a foam target with laser-induced hohlraum radiation in the soft X-ray regime. We used the tri-cellulose acetate (C9H16O8) foam of 2 mg/cm−3 density, and 1-mm interaction length as target material. This kind of plasma is advantageous for high-precision measurements, due to good uniformity and long lifetime compared to the ion pulse length and the interaction duration. The plasma parameters were diagnosed to be Te=17 eV and ne=4 × 1020 cm−3. The average charge states passing through the plasma were observed to be higher than those predicted by the commonly-used semiempirical formula. Through solving the rate equations, we attribute the enhancement to the target density effects which will increase the ionization rates on one hand and reduce the electron capture rates on the other hand. In previsous measurement with partially ionized plasma from gas discharge and z-pinch to laser direct irradiation, no target density effects were ever demonstrated. For the first time, we were able to experimentally prove that target density effects start to play a significant role in plasma near the critical density of Nd-Glass laser radiation. The finding is important for heavy ion beam driven high energy density physics and fast ignitions. © 2022, CC BY-NC-ND.

关键词： Irradiation

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Modulatory Effects of Ethanol with Nicotiana Tabacum and Cannabis Sativa on Markers of Brain Function and Haematological Parameters: In-Vivo and In-Silico Approach

Modulatory Effects of Ethanol with Nicotiana Tabacum and Can...

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science, Engineering and Business for Sustainable development Goals (SEB-SDG), International Conference on

作者： Charles Nwonuma O. Blessing Olwafunmilola Olajide Boluwatife Afolabi Babasoji Omoniwa Percy Nwikwe David Chukwuma Omokolade Olwuwaseyi Alejolowo Tobiloba Christiana Elebiyo Omowumi Titilola Kayode Oluwafemi Adeleke Ojo Olasoju Taiwo Isreal Siddiq Ali Idoko Odunayo Anthonia Taiwo Oludipe Emmanuel Olorunleke Department of Biochemistry College of Pure and Applied Sciences Landmark University Omu Aran Kwara State Nigeria Department of Biochemistry College of Pure and Applied Sciences Landmark University Omu Aran Kwara State Nigeria Kwara State Nigeria Department of Biochemistry College of Pure and Applied Sciences Department of Science Laboratory Technology Ethnopharmacology Reproductive Biochemistry and Biochemical Toxicology Research Laboratory University of Jos Nigeria Department of Biochemistry University of Ilorin Ilorin Nigeria Department of Biochemistry Mountain Top University Ogun State Nigeria Department of Biochemistry Phytomedicine Molecular Toxicology and Computational Biochemistry Research Group Bowen University Iwo Nigeria Department of Veterinary and Pest Control Services Federal Ministry of Agriculture and Rural Development Abuja Nigeria Department of Biochemistry Federal University Dutsin-Ma Katsina State Nigeria Department of Biochemistry Chrisland University Abeokuta Nigeria Department of Food Science and Microbiology Landmark University Omuaran Kwara State Nigeria

ISBN: (数字)9798350358155

ISBN: (纸本)9798350358162

Drugs and other substances with psychoactive substances have the potential to alter body functioning and structure when ingested either for medical or recreational purposes. The study investigated the effects of ethanol with Nicotiana tabacum and Cannabis sativa on markers of brain function and hematological parameters through both an experimental and docking predictive approach. Thirty-five female Wistar rats with an average weight of 180 ± 0.5 g were randomly assigned to seven treatment groups of five rats each: ethanol, Nicotiana tabacum, Cannabis sativa, ethanol + Nicotiana tabacum, ethanol + Cannabis sativa, and ethanol + Nicotiana tabacum + Cannabis sativa. The dosage of the substance administered in each group includes 30 ml/kg body weight (BW) of 40% ethanol, 13.44 g/kg BW of Nicotiana tabacum, and 6.72 g/kg BW of Cannabis sativa. Smoke from Nicotiana tabacum and Cannabis sativa sativa was inhaled for five minutes while ethanol was given orally. At the end of the 28-day treatment, the rats were euthanized. Brain homogenates underwent biochemical assays and blood parameters were examined. There was a significant decrease (p<0.05) in malondialdehyde (MDA) concentration in the ethanol group in comparison to the treated groups and the control group. On the contrary, the groups exposed to Nicotiana tabacum and Cannabis sativa smoke, as well as the control group showed a significant increase (p<0.05) in total protein concentration compared to the ethanol group. There was a significant decrease (p<0.05) in catalase activity in the ethanol group compared to the treated groups and the control group. Furthermore, there was a significant increase (p<0.05) in HGB and RDW in groups exposed to Nicotiana tabacum and Cannabis sativa smoke respectively, and in the control group in comparison to the ethanol group. When compared to ethanol and nicotine, delt-9-tetrahydrocannabinol had the highest binding energy across receptor proteins. Ethanol, nicotine, and delt-9- tetrahydr

关键词： Proteins Drugs Brain Ethanol Rats Biomarkers Receptor (biochemistry)

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ABACUS: An Electronic Structure Analysis Package for the AI Era

arXiv

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arXiv 2025年

作者： Zhou, Weiqing Zheng, Daye Liu, Qianrui Lu, Denghui Liu, Yu Lin, Peize Huang, Yike Peng, Xingliang Bao, Jie J. Cai, Chun Jin, Zuxin Wu, Jing Zhang, Haochong Jin, Gan Ji, Yuyang Shen, Zhenxiong Liu, Xiaohui Sun, Liang Cao, Yu Sun, Menglin Liu, Jianchuan Chen, Tao Liu, Renxi Li, Yuanbo Han, Haozhi Liang, Xinyuan Bao, Taoni Chen, Nuo Ren, Hongxu Zhang, Xiaoyang Liu, Zhaoqing Fu, Yiwei Liu, Maochang Li, Zhuoyuan Wen, Tongqi Tang, Zechen Xu, Yong Duan, Wenhui Wang, Xiaoyang Gu, Qiangqiang Dai, Fu-Zhi Zheng, Qijing Zhao, Jin Zhang, Yuzhi Ou, Qi Jiang, Hong Liu, Shi Xu, Ben Xu, Shenzhen Ren, Xinguo He, Lixin Zhang, Linfeng Chen, Mohan AI for Science Institute Beijing100080 China HEDPS CAPT School of Physics College of Engineering Peking University Beijing100871 China College of Engineering Peking University Beijing100871 China Institute of Artificial Intelligence Hefei Comprehensive National Science Center Hefei230026 China Key Laboratory of Quantum Information University of Science and Technology of China Hefei230026 China Supercomputing Center University of Science and Technology of China Anhui Hefei230026 China Institute of Physics Chinese Academy of Sciences Beijing100190 China School of Materials Science and Engineering Peking University Beijing100871 China School of Electrical Engineering and Electronic Information Xihua University Chengdu610039 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China College of Chemistry and Molecular Engineering Peking University Beijing100871 China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow Xi’an Jiaotong University Shaanxi Xi’an710049 China Suzhou Academy of Xi’an Jiaotong University Jiangsu Suzhou215123 China Center for Structural Materials Department of Mechanical Engineering The University of Hong Kong Hong Kong The University of Hong Kong Shenzhen China State Key Laboratory of Low Dimensional Quantum Physics Department of Physics Tsinghua University Beijing100084 China Frontier Science Center for Quantum Information Beijing China Saitama Wako351-0198 Japan Institute for Advanced Study Tsinghua University Beijing100084 China Laboratory of Computational Physics Institute of Applied Physics and Computational Mathematics Fenghao East Road 2 Beijing100094 China School of Artificial Intelligence and Data Science University of Science and Technology of China Hefei230026 China School of Materials Science and Engineering University of Science and Technology Beijing Beijing100083 China Department of Physics University of Science and

ABACUS (Atomic-orbital Based Ab-initio Computation at USTC) is an open-source software for first-principles electronic structure calculations and molecular dynamics simulations. It mainly features density functional theory (DFT) and is compatible with both plane-wave basis sets and numerical atomic orbital basis sets. ABACUS serves as a platform that facilitates the integration of various electronic structure methods, such as Kohn-Sham DFT, stochastic DFT, orbital-free DFT, and real-time time-dependent DFT, etc. In addition, with the aid of high-performance computing, ABACUS is designed to perform efficiently and provide massive amounts of first-principles data for generating general-purpose machine learning potentials, such as DPA models. Furthermore, ABACUS serves as an electronic structure platform that interfaces with several AI-assisted algorithms and packages, such as DeePKS-kit, DeePMD, DP-GEN, DeepH, DeePTB, etc. Copyright © 2025, The Authors. All rights reserved.

关键词： Stochastic systems

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Self-assembled ultrafine CsPbBr_(3) perovskite nanowires for polarized light detection

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science China Materials 2021年第9期64卷 2261-2271页

作者： Zixing Peng Dandan Yang Bozhao Yin Xin Guo Shuang Li Qiuqiang Zhan Xiudi Xiao Xiaofeng Liu Zhiguo Xia Zhongmin Yang Jianrong Qiu Guoping Dong State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques and Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and DevicesSouth China University of TechnologyGuangzhou 510640China Centre for Optical and Electromagnetic Research South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Key Laboratory of Renewable Energy Guangdong Key Laboratory of New and Renewable Energy Research and DevelopmentGuangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China College of Optical Science and Engineering State Key Laboratory of Modern Optical InstrumentationZhejiang UniversityHangzhou 310027China

One-dimensional(1D)metal halide perovskite nanowire(NW)arrays with high absorption efficiency,emission yield and dielectric constants,as well as anisotropic optoelectronic properties have found applications in energy harvesting,flexible electronics,and biomedical imaging ***,a modified two-step solvothermal method is developed for the synthesis of self-assembled cubic CsPbBr_(3) NW *** method provides facile access to continuous and uniform ultrafine perovskite NWs and well-aligned pure perovskite NW arrayed *** excitation at 365 nm,the CsPbBr_(3) NWs give a strong blue emission observable to the naked *** CsPbBr_(3) NWs also exhibit strong two-photon excited luminescence under the irradiation with an 800 nm pulse *** rotating the polarization angle of the 800 nm laser,strong polarization dependence with a polarization degree up to~0.49 is demonstrated in the selfassembled CsPbBr_(3) NW array,although the CsPbBr_(3) NWs have an isotropic cubic *** on density functional theory(DFT)calculations,this polarization-dependent emission is correlated with the anisotropic charge density distribution of the perovskite *** findings suggest that the ultrafine CsPbBr_(3) NWs with a well-defined self-assembled architecture could be applied as next-generation polarizationsensitive photoelectronic detection materials.

关键词： ultrafine perovskite nanowires self-assembly perovskite nanowire array anisotropy polarization-sensitive detection

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Effect of the Stark shift on the low-energy interference structure in strong-field ionization

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Physical Review A 2021年第5期103卷 053105-053105页

作者： Weifeng Yang Jie Li Wenbin Jia Hongdan Zhang Xiwang Liu Ming Zhu Xiaohong Song Jing Chen Research Center for Advanced Optics and Photoelectronics Department of Physics College of Science Shantou University Shantou Guangdong 515063 China Institute of Mathematics Shantou University Shantou Guangdong 515063 China MOE Key Laboratory of Intelligent Manufacturing Technology Shantou University Shantou Guangdong 515063 China HEDPS Center for Applied Physics and Technology Peking University Beijing 100084 China Institute of Applied Physics and Computational Mathematics P.O. Box 8009 Beijing 100088 China

An improved quantum trajectory Monte Carlo method including the Stark shift of the initial state, Coulomb potential, and multielectron polarization-induced dipole potential is adopted to revisit the origin of the low-energy interference structure in the photoelectron momentum distribution of the xenon atom subjected to an intense laser field, and resolve the different contributions of these three effects. We found that the Stark shift plays an essential role on the low-energy interference structure, which moves the ringlike constructive interference structure to the lower momentum region. The formation of the low-energy interference structure is a result of the combined effects of Stark shift, laser, and Coulomb fields, while the multielectron polarization mainly enhance the probability of the low energy photoelectron spectrum. Our finding provides insight into the electron dynamics of atoms and molecules when driven by the intense laser fields.

关键词： Atomic & molecular processes in external fields Multiphoton or tunneling ionization & excitation

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