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MXene Hybridized Polymer with Enhanced Electromagnetic Energy Harvest for sensitized Microwave Actuation and self‑Powered Motion sensing

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Nano-Micro Letters 2025年第3期17卷 265-279页

作者： Yu‑Ze Wang Yu‑Chang Wang Ting‑Ting Liu Quan‑Liang Zhao Chen‑sha Li Mao‑sheng Cao school of Materials science and Engineering Beijing Institute of TechnologyBeijing 100081People’s Republic of China school of Materials science and Engineering Peking UniversityBeijing 100871People’s Republic of China school of Mechanical and Material Engineering North China University of TechnologyBeijing 100144People’s Republic of China Key Laboratory of Functional inorganic Material Chemistry Ministry of Education of the People’s Republic of ChinaHeilongjiang UniversityHarbin 150080People’s Republic of China

Polymeric microwave actuators combining tissue-like softness with programmablemicrowave-responsive deformation hold great promise for mobile intelligentdevices and bionic soft robots. However, their application is challenged by restricted electromagneticsensitivity and intricate sensing coupling. in this study, a sensitized polymericmicrowave actuator is fabricated by hybridizing a liquid crystal polymer with Ti3C2Tx(MXene). Compared to the initial counterpart, the hybrid polymer exhibits unique spacechargepolarization and interfacial polarization, resulting in significant improvements of230% in the dielectric loss factor and 830% in the apparent efficiency of electromagneticenergy harvest. The sensitized microwave actuation demonstrates as the shortenedresponse time of nearly 10 s, which is merely 13% of that for the initial shape memory polymer. Moreover, the ultra-low content of MXene (upto 0.15 wt%) benefits for maintaining the actuation potential of the hybrid polymer. An innovative self-powered sensing prototype that combinesdriving and piezoelectric polymers is developed, which generates real-time electric potential feedback (open-circuit potential of ~ 3 mV) duringactuation. The polarization-dominant energy conversion mechanism observed in the MXene-polymer hybrid structure furnishes a new approachfor developing efficient electromagnetic dissipative structures and shows potential for advancing polymeric electromagnetic intelligent devices.

关键词： Microwave absorption Electromagnetic response Energy harvest self-sensing soft actuator

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Facile synthesis of the dodecahydridododecaborate (B12H122-) from borane Lewis base adducts

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science China Chemistry 2025年

作者： Yi Jing Xin-Ran Liu Xing-Hua Wang Hui Han sha-sha Liang Xi-Meng Chen Dong-Hui Wei Lai-sheng Wang Xue-Nian Chen College of Chemistry Zhengzhou University school of Chemistry and Chemical Engineering Henan Key Laboratory of Boron Chemistry and Advanced MaterialsHenan Normal University Department of Chemistry Brown University

Polyhedral boranes are a class of well-known boron molecular clusters widely used in energy,chemistry,medicine,and materials science because of their unique physical and chemical *** efforts have been made in the past decades to find more effective synthetic methods for this important class of boron ***,existing synthetic methods suffer from low efficiency and low ***,we report a facile one-pot synthesis of[（CH3）3s]2B12H12with moderate yields at mild *** mechanisms for the multi-step chemoselective synthesis of B12H122-without other by-products are elucidated based on theoretical results and our previous *** Lewis base used in B–H bond condensation reaction,which acts as a hydrogen or to balance the newly generated polyhedral borane charges,is proposed and studied in *** current study has led to a more effective and selective synthetic method for B12H122-and has also implicated the syntheses of other new polyhedral boranes.

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Atomically precise nickel-sulfur clusters for efficient electrochemical 2,5-hydroxymethylfurfural oxidation

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Nano Research 2025年第1期18卷 140-148页

作者： Fen Wang Lu-Yu Liu sha-sha Cui Ting-Ting Li Xiao-Meng Yang Zhijuan Liu Yanyong Wang Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Centerand College of ChemistryZhengzhou UniversityZhengzhou 450001China state Key Laboratory of Chem/Bio-sensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha 410082China

Nickel sulfide exhibits excellent catalytic activity in the electrochemical 2,5-hydroxymethylfurfural oxidation reaction(HMFOR).However,due to the polydispersity of nanoparticles,it is difficult to establish a clear structure-activity relationship at the atomic *** this work,we have successfully synthesized atomically precise Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)clusters(PET:2-phenylethanethiol)for ***^(2+)and s_(2)-with atomic ratio of 1:2 was mainly existed in Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)to form Ni-s *** electrochemical test results have suggested both Ni_(6)(PET)_(12)and Ni_(4)(PET)_(8)displayed outstanding electrocatalytic ability for *** Ni_(6)(PET)_(12)exhibited better electrocatalytic ability than Ni_(4)(PET)_(8)with higher current density,lower overpotential and faster reaction *** superior electrochemical ability of Ni_(6)(PET)_(12)may be due to the enhanced adsorption towards HMF molecule with strong interaction towards hydroxyl group and furan ***,it found that the Ni^(2+)species in Ni_(6)(PET)_(12)could rapidly oxidized into Ni^(3+)species,which could spontaneously capture electron and proton from HMF for *** theoretical calculation demonstrated that the Ni_(6)(PET)_(12)process lower free energy barrier than Ni_(4)(PET)_(8)to display excellent electrocatalytic *** work is of great significance for designing efficient electrocatalysts for HMFOR.

关键词： atomically precise nickel nanoclusters 2 5-hydroxymethylfurfural electro-oxidation Ni3+species

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从殖民主义视阈解读列奥波尔德·赛达·桑戈尔双重身份

语言与文化研究

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语言与文化研究 2025年第1期33卷 250-253页

作者：胡莎云南大学昆明650500

列奥波尔德·赛达·桑戈尔是非洲塞内加尔的开国总统同时兼任法国制宪委员会议员。作为塞内加尔国民,桑戈尔始终与法国关系亲密,在塞内加尔推行法国文化。作为一名法国公民,桑戈尔提出黑人性精神,推动西非人民的独立运动,脱离法国殖民... 详细信息

列奥波尔德·赛达·桑戈尔是非洲塞内加尔的开国总统同时兼任法国制宪委员会议员。作为塞内加尔国民,桑戈尔始终与法国关系亲密,在塞内加尔推行法国文化。作为一名法国公民,桑戈尔提出黑人性精神,推动西非人民的独立运动,脱离法国殖民。桑戈尔的双重国籍身份,支持塞内加尔的独立以及促进法国对塞同化矛盾行径,使得外界对桑戈尔的评价褒贬不一。本文将从列奥波尔德·赛达·桑戈尔的生平,殖民时期的同化政策对桑戈尔双重身份的解构与去殖民化对桑戈尔双重身份的重构三个角度来解读桑戈尔的双重身份,让更多的人能从更客观的角度来重新认识桑戈尔。

关键词：桑戈尔双重身份殖民主义同化政策去殖民化

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基于仿真方法的共享换电站价值量化分析

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北京工业大学学报 2025年第1期51卷 22-31页

作者：沙玲汪静张海峰王岱上海工程技术大学机械与汽车工程学院上海201620 上海蔚来汽车有限公司上海201800

相较于电动汽车充电站,换电站具有补能时间短、空间面积小等优点。多品牌电动汽车高效共享换电站,能够极大程度优化补能结构,减少资源浪费。为了量化共享换电站对电动汽车用户的价值,基于排队理论,利用蔚来汽车品牌的运行数据,搭建一个... 详细信息

相较于电动汽车充电站,换电站具有补能时间短、空间面积小等优点。多品牌电动汽车高效共享换电站,能够极大程度优化补能结构,减少资源浪费。为了量化共享换电站对电动汽车用户的价值,基于排队理论,利用蔚来汽车品牌的运行数据,搭建一个模拟用户换电行为的仿真器,通过量化用户的平均排队时间和换电站数量,评估电动汽车用户在不同电动汽车规模和换电站渗透率下的换电体验。结果表明,电动汽车品牌共享换电站资源,能够显著减少电动汽车用户的排队时间,以及将排队时间保持在期望阈值内所需的换电站数量,从而提高用户的充电体验并节省换电站建设成本。

关键词：电动汽车换电站共享排队论换电体验仿真

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Development of Nano-tetragonal Zirconia-incorporated Ni–P Coatings for High Corrosion Resistance

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Acta Metallurgica sinica(English Letters) 2019年第4期32卷 481-494页

作者： s.M.A.shibli K.s.Chinchu M.Ameen sha Department of Chemistry University of KeralaKariavattom CampusThiruvananthapuram

Pure tetragonal 10-20-nm-size zirconia-based Ni-P composite coating was developed. The physicochemical and electrochemical characteristics including corrosion resistance of the coating were investigated. The Ni-P-nano-tetragonal zirconia coating was partially crystalline having face-centered cubic phase. The coating had very high corrosion resistance due to its dense compact morphology and low surface roughness. The Ni-P-nano-tetragonal zirconia coatings exhibited a cathodic shift of open-circuit potential(OCP) in the range from-0.340 to-0.520 V. A high polarization resistance of the order of 13.2 kΩ/cm^2 and low corrosion current density of 3.9 μA/cm^2 were achieved due to the effective incorporation of zirconia into the coating.

关键词： Composites Corrosion resistance substrates Ni–P ZrO2

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Unlocking hypoglycemia–associated brain microvascular dysfunction:critical insights from proteomic analysis

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Neural Regeneration Research 2025年第6期20卷 1707-1708页

作者： siva s.V.P.sakamuri Anil sakamuri Department of Chemistry Auburn University at MontgomeryMontgomeryALUSA Vascular Biology Center and Department of Medicine Medical College of Georgia at Augusta UniversityAugustaGAUSA

Hypoglycemia-a critical complication linked to worsened brain function in diabetic subjects:Hypoglycemia is characterized by a decline in circulatory glucose levels below sta nda rd physiological *** hypoglycemia,classified as level 1 hypoglycemia,is defined by blood glucose levels below 70 mg/dL and can be effectively addressed through carbohydrate *** hypoglycemia,denoted by blood glucose levels less than 54 mg/dL,poses a life-threatening risk if left *** with type 1 and type 2 diabetes undergoing insulin treatment are particularly susceptible to hypoglycemia due to impaired counterregulatory mechanisms.

关键词： impaired intake critical

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Complete solutions for elastic fields induced by point load vector in functionally graded material model with transverse isotropy

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Applied Mathematics and Mechanics(English Edition) 2023年第3期44卷 411-430页

作者： sha XiAO Zhongqi YUE Key Laboratory of Urban security and Disaster Engineering of China Ministry of Education Beijing University of TechnologyBeijing 100124China Department of Civil Engineering The University of Hong KongHong KongChina

The paper develops and examines the complete solutions for the elastic field induced by the point load vector in a general functionally graded material(FGM)model with transverse *** FGMs are approximated with n-layered *** of the n-layered materials is homogeneous and transversely *** complete solutions of the displacement and stress fields are explicitly expressed in the forms of fifteen classical Hankel transform integrals with ten kernel *** ten kernel functions are explicitly expressed in the forms of backward transfer matrices and have clear mathematical *** singular terms of the complete solutions are analytically isolated and expressed in exact closed forms in terms of elementary harmonic *** results show that the computation of the complete solutions can be achieved with high accuracy and efficiency.

关键词： functionally graded material(FGM) transverse isotropy elasticity closedform singular solution Green's function point load vector

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Multi-Behavior Fusion Based Potential Field Method for Path Planning of Unmanned surface Vessel

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China Ocean Engineering 2019年第5期33卷 583-592页

作者： FU Ming-yu WANG sha-sha WANG Yuan-hui College of Automation Harbin Engineering University

The problem of the unmanned surface vessel (UsV) path planning in static and dynamic obstacle environments is addressed in this paper. Multi-behavior fusion based potential field method is proposed, which contains three behaviors: goal-seeking, boundary-memory following and dynamic-obstacle avoidance. Then, different activation conditions are designed to determine the current behavior. Meanwhile, information on the positions, velocities and the equation of motion for obstacles are detected and calculated by sensor data. Besides, memory information is introduced into the boundary following behavior to enhance cognition capability for the obstacles, and avoid local minima problem caused by the potential field method. Finally, the results of theoretical analysis and simulation show that the collision-free path can be generated for UsV within different obstacle environments, and further validated the performance and effectiveness of the presented strategy.

关键词： UsV path planning potential field method multi-behavior fusion activation conditions local minima

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Percutaneous ultrasound-guided coaxial core needle biopsy for the diagnosis of multiple splenic lesions: A case report

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World Journal of gastrointestinal surgery 2024年第2期16卷 616-621页

作者： sha-Hong Pu Wu-Yong-ga Bao Zhen-Peng Jiang Rui Yang Qiang Lu Department of Medical Ultrasound West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina

BACKGROUND The overlap of imaging manifestations among distinct splenic lesions gives rise to a diagnostic ***,a definitive diagnosis primarily relies on his-tological *** ultrasound(Us)-guided coaxial core needle biopsy(CNB)not only procures sufficient tissue to help clarify the diagnosis,but reduces the incidence of puncture-related *** sUMMARY A 41-year-old female,with a history of pulmonary tuberculosis,was admitted to our hospital with multiple indeterminate splenic ***-scale ultrasono-graphy demonstrated splenomegaly with numerous well-defined hypoechoic *** contrast-enhanced computed tomography(CT)showed an en-larged spleen with multiple irregular-shaped,peripherally enhancing,hypodense *** emission CT revealed numerous abnormal hyperglycemia *** imaging findings strongly indicated the possibility of infectious disease as the primary concern,with neoplastic lesions requiring *** obtain the precise pathological diagnosis,the Us-guided coaxial CNB of the spleen was ca-rried *** patient did not express any discomfort during the *** Percutaneous Us-guided coaxial CNB is an excellent and safe option for obtaining precise splenic tissue samples,as it significantly enhances sample yield for exact pathological analysis with minimum trauma to the spleen parenchyma and sur-rounding tissue.

关键词： spleen splenic disease Ultrasound Biopsy Ultrasound-guided coaxial core needle biopsy Case report

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