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Solution-processed rare-earth thulium oxide with high permittivity for low-voltage transistor and inverters applications

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Journal of Rare Earths 2024年第8期42卷 1604-1609,I0007页

作者： Daiming Liu fei wang Yongtao Zhang Ya'nan Ding Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-Materials College of Electromechanical EngineeringQingdao University of Science&TechnologyQingdao266061China College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao266590China

The use of high-permittivity(high-k) thin films as gate dielectrics is essential in the development of lowpower electronics,In this work,rare-earth thulium oxide(Tm_(2)O_(3)) thin films were prepared by a facile solution process and annealed at various temperatures from 400 to 700℃.The evolution of the physical and dielectric properties of Tm_(2)O_(3) thin film with annealing temperature was *** is demonstrated that the Tm_(2)O_(3) thin film annealed at 600℃ exhibits the optimal performance,including a low leakage current of 3×10^(-10) A/cm^(2),a large areal capacitance of 250 nF/cm^(2) at 100 Hz,and a high permittivity value of *** Tm_(2)O_(3) thin film as a gate insulator was integrated into the thin film transistor(TFT) employing In_(2)O_(3)-based semiconducting *** In_(2)O_(3) TFT with 600℃-annealed Tm_(2)O_(3) dielectric exhibits the superior perfo rmance,with a high I_(on)/I_(off) of 1.65×10^(7),a small subthre shold swing(SS) value of 0.2 V/dec,a V_(TH) of+1.8 V,and a mobility of 1.68 cm^(2)/(V·s).Furthermore,an inverter constructed by connecting the TFT with a resistor exhibits full-swing *** work provides a facile and appealing method for preparing the high-k Tm_(2)O_(3) thin films as alternative gate dielectrics with the potential for use in low-power electronics and logic circuit applications.

关键词： Rare earths Tm_(2)O_(3) Dielectric Transistor Inverter

Polarization-selective nanogold absorber by twisted stacking

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Nano Research 2023年第7期16卷 10392-10400页

作者： fei wang Zexiang Han Juehan Sun Wajid Ali Xiaoli wang Zhiyong Tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China School of Future Technology University of Chinese Academy of SciencesBeijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Metamaterial absorbers show great promise for applications in optical manipulation,photodetection,solar energy harvesting,and *** this work,we present a twisted stacked metamaterial design that serves as a plasmonic perfect absorber with polarization *** effective energy localization,the metamaterial realizes a near-unity absorbance of up to 99.6%for right circularly polarized incidence and 97.2%for left circularly polarized *** a longer wavelength in the visible range,the chiral metamaterial becomes more sensitive to the polarization state of the incident wave,retaining an ultrahigh absorption of light(~94%)for only a given polarization state,that is,light in this polarization state is effectively shielded.A giant circular dichroism signal of up to 7°can be simultaneously *** field and charge distribution simulations further reveal that the ultrahigh performance of the design is attributed to the interplay between cavity coupling,magnetic resonances,and plasmonic *** switchable and tunable chirality,the plasmonic metamaterial presents a nearperfect absorption band with tunable operational *** envision that the high-performance chiral gold metamaterial proposed here can serve as a good candidate for light trapping,chirality sensing,polarized light detection,and polarizationenhanced photocatalysis.

关键词： perfect absorber chirality plasmonic metal-dielectric-metal magnetic field enhancement

Hot electron assisted photoelectrochemical water splitting from Audecorated ZnO@TiO_(2) nanorods array

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Nano Research 2022年第7期15卷 5824-5830页

作者： Hongdong Li Hongyan Liu fei wang Guodong Li Xiaoli wang Zhiyong Tang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Eco-chemical Engineering College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China Beijing Institute of Aeronautical Materials Beijing 100095China

Engineering of semiconductor nanomaterials is critical to enhance the photoelectrochemical(PEC)performance for water ***,semiconductors often show the low light absorption,slow charge transfer,and easy recombination of carriers,thus leading to the low catalytic *** this work,we show facile synthesis of ZnO@TiO_(2) core–shell nanorods(NRs)arrays modified with Au nanoparticles(NPs)as the photoelectrode for PEC water ***,the obtained ZnO@TiO_(2)(15 nm)/Au(8 nm)array shows the maximum photocurrent density of 3.14 mA/cm^(2) at 1.2 V *** hydrogen electrode(RHE),2.6 times and 1.7 times higher than those obtained from ZnO NRs and ZnO@TiO_(2)(15 nm)*** electric-field simulation and transient absorption spectroscopy show that the Au-decorated core–shell nanostructures have an enhanced hot electron generation and prolonged decay time,indicating effective charge transfer and recombination inhibition of *** work provides an efficient preparation strategy for photoelectrodes as well as great potential for the large-scale development of this technology.

关键词： surface plasmon resonance energy transfer transient absorption hot electron water splitting

Progress and challenges of electrolyte modulation in aqueous zinc-ion batteries

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Rare Metals 2024年第7期43卷 2940-2967页

作者： Qi-Hang Yang Lu-fei wang Xiao-Yu wang Meng-Meng Zhen Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300071China

As a new type of green battery system,aqueous zinc-ion batteries(AZIBs)have gradually become a research hotspot due to their low cost,high safety,excellent stability,high theoretical capacity(820 mAh·g^(-1))of zinc anode,and low redox potential(-0.76 V *** hydrogen electrode(SHE)).AZIBs have been expected to be an alternative to lithium-ion batteries for large-scale commercial energy storage ***,they are facing thorny issues such as degradation of cycling performance,zinc dendrites,and side *** the same time,these problems cause short cycling life of batteries,thus severely limiting their commercial *** recent years,many more researches have been conducted on the modification of anode and cathode materials of AZIBs,but there is a lack of in-depth discussion on the characteristics and mechanism of electrolyte *** this review,we will make a systematic summary of the current problems with two electrodes in AZIBs,as well as the types and functions of electrolyte ***,we further systematically describe the modulation mechanism of electrolyte additives in the performance of the cathode and *** prospects and development directions of additive modulation strategies for AZIBs electrolytes are prospected.

关键词： Electrolyte additives Aqueous zinc-ion batteries Zinc anode protection Cathode chemistry

Dendrimer-based Hydrogels with Controlled Drug Delivery Property for Tissue Adhesion

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Chinese Journal of Polymer Science 2021年第11期39卷 1421-1430页

作者： Ya-Qiang wang Xue-Yu Dou Hu-fei wang Xing wang De-Cheng Wu Beijing National Laboratory for Molecular Sciences State Key Laboratory of Polymer Physics&ChemistryInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Department of Biomedical Engineering Southern University of Science and TechnologyShenzhen 518055China

In recent years,the hydrogel-based tissue adhesives have been extensively investigated for their excellent biocompatibility and the ability to be administered directly within the adherent *** meet the requirement for more controllable release in various physiological settings,the components of hydrogel adhesive should be more precisely *** this work,the POSS-ace-PEG hydrogel adhesive was fabricated with the polyacetal dendrimer G1’-[NH3 Cl]16 and poly(ethylene glycol)succinimidyl carbonate(PEG-SC)due to the regular peripheral amino structure of G1’-[NH3 Cl]*** and adhesion tests demonstrated that the hydrogel adhesive had good mechanical and adhesive properties,which could effectively adhere to the pigskin and severed ***,the tissue adhesive exhibited good stability under neutral conditions and the rapid degradation under acidic conditions,allowing for the release of doxycycline hydrochloride(DOX)drug in response to ***,these results suggested that the POSS-ace-PEG adhesive had the potential to provide an alternative to tissue adhesives for applications in pathological environments(inflammation,tumors,etc.).

关键词： Hydrogel adhesive Dendrimer pH-Responsive Drug delivery Tissue adhesion

Timing and Processes of Ore Formation in the Qingchengzi Polymetallic Orefield, Northeast China: Evidence from 40Ar/39Ar Geochronology

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Acta Geologica Sinica(English Edition) 2020年第3期94卷 789-800页

作者： wang Yinzhi wang fei SHI Wenbei YANG Liekun WU Lin State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

The Qingchengzi orefield is a large polymetallic ore concentration area in the Liaodong peninsula,northeastern China,that includes twelve Pb-Zn deposits and five Au-Ag deposits along its *** ore-forming age remains much disputed,which prevents the identification of the relationship between the mineralization and the associated *** this paper,we quantitatively present the feasibility of making ore mineral 40Ar/39Ar dating and report reliable 40Ar/39Ar ages of lamprophyre groundmass,K-feldspar and sphalerite from the Zhenzigou *** and indirect methods are applied to constrain the timing of mineralization,which plays a vital role in discussing the contribution of multistage magmatism to ore *** low-potassium sphalerite yielded an inverse isochron age of 232.8±41.5 Ma,which features a relatively large *** lamprophyre groundmasses got reliable inverse isochron ages of 193.2±1.3 Ma and 152.3±1.5 Ma,respectively.K-feldspar yielded a precise inverse isochron age of 134.9±0.9 *** four ages indicate that the mineralization is closely associated with Mesozoic ***,regarding the cooling age of the earliest Mesozoic Shuangdinggou intrusion(224.2±1.2 Ma)as the initial time of mineralization,we can further constrain the age of the sphalerite to 224–191 *** new and existing geochronological data,combined with the interaction cutting or symbiotic relationship between the lamprophyre veins and ore veins,suggest that the Pb-Zn-Au-Ag mineralization in the Qingchengzi orefield mainly occurred during three periods:the late Triassic(ca.224–193 Ma),the late Jurassic(ca.167–152 Ma)and the early Cretaceous(ca.138–134 Ma).This polymetallic deposits are shown to have been formed during multiple events coinciding with periods of the Mesozoic magmatic *** contrast,the Proterozoic magmatism and submarine exhalative and hydrothermal sedimentation in the Liaolaomo paleorift served mainly to transport and concent

关键词： 40Ar/39Ar dating mineralization ages magmatism Qingchengzi orefield Mesozoic

Regulation effect of the grille spacing of a funnel-type grating water–sediment separation structure on the debris flow performance

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Journal of Mountain Science 2024年第7期21卷 2283-2304页

作者： LI Shuai GU Tianfeng wang Jiading wang fei LI Pu State Key Laboratory of Continental Dynamics/Department of Geology Northwest UniversityXi’an 710069China Chengdu Institute of Mountain Hazards and Environment Ministry of Water Resources&Chinese Academy of SciencesChengdu 610299China

The size of pores or the grille spacing of water–sediment separation structures directly affects their regulation effect on the debris flow performance.A suitable pore size or grille spacing can effectively improve the water–sediment separation ability of the *** new funnel-type grating water–sediment separation structure(FGWSS)combines vertical and horizontal structures and provides a satisfactory water–sediment separation ***,the regulation effect of the grille spacing of the structure on the debris flow performance has not been *** regulation effect of the structure grille spacing on the debris flow performance is studied through a flume test,and the optimal structure grille spacing is *** empirical equation of the relationship between the relative grille spacing of the structure and the sediment separation rate is ***,the influence of the water–sediment separation structure on the regulation effect of debris flows is examined from two aspects:external factors(properties of debris flows)and internal factors(structural factors).The experimental results show that the gradation characteristics of solid particles in debris flows constitute a key factor affecting the regulation effect of the structure on the debris flow *** optimum grille spacing of the FGWSS matches the particle size corresponding to the material distribution curves d85~d90 of the debris *** total separation rate of debris flow particles is related to the grille spacing of the structure and the content of coarse and fine particles in the debris flow.

关键词： Debris flow Water–sediment separation structure Grille spacing Performance regulation effect

亚冬会背景下黑龙江省冰雪体育旅游提质升级路径研究

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哈尔滨体育学院学报 2025年第1期43卷 48-55页

作者：高人王飞马莉娅哈尔滨体育学院研究生院黑龙江哈尔滨150008 哈尔滨体育学院体育人文与社会学院黑龙江哈尔滨150008

2025年亚冬会的举办将为黑龙江省冰雪体育旅游发展提供新的契机和动力。通过文献资料、逻辑分析等研究方法,结合亚冬会背景对黑龙江省冰雪体育旅游提质升级路径进行研究,有助于加速推进区域冰雪体育旅游发展,提升我国冰雪体育旅游总体... 详细信息

2025年亚冬会的举办将为黑龙江省冰雪体育旅游发展提供新的契机和动力。通过文献资料、逻辑分析等研究方法,结合亚冬会背景对黑龙江省冰雪体育旅游提质升级路径进行研究,有助于加速推进区域冰雪体育旅游发展,提升我国冰雪体育旅游总体质量。研究得出:2025年亚冬会为黑龙江省冰雪体育旅游产业转型升级、基础设施建设、竞争优势扩大和政府职能转变提供了重要的推动作用,黑龙江省冰雪体育旅游呈现出地理环境、人才资源和人文特色等潜在优势,但也面临着体旅融合程度低、基础设施亟待升级、区位竞争优势不足、商业运营缺乏活力的现实困境。基于此,黑龙江省冰雪体育旅游应营造多元消费场景,促进体旅融合发展;提高供给服务水平,完善基础设施建设;打造特色旅游产品,扩大产业竞争优势;坚持有为政府主导,逐步增强市场活力。

关键词：亚冬会黑龙江省冰雪体育旅游提质升级

Efficient Copolymerization of Ethylene with Polar Divinyl Monomer by Phosphino-Phenolate Nickel Catalyst

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Chinese Journal of Chemistry 2023年第9期41卷 1037-1044页

作者： fei wang Xu-ling wang Li Pan Bin wang Yue-Sheng Li Tianjin Key Lab of Composite&Functional Materials School of Material Science and EngineeringTianjin UniversityTianjin 300072China College of Chemistry and Chemical Engineering Yantai UniversityYantaiShandong 264005China

Direct copolymerization of olefin with polar monomers via a coordination-insertion mechanism appears as the most efficient and at-tractive method to prepare functionalized ***,we carried out direct copolymerization of ethylene and allyl acrylate by a bulky phosphino-phenolate nickel catalyst,in which high-molecular-weight copolymers bearing polar five-membered and six-membered ring structures were *** NMR and FT-I R analyses revealed multiplex structure of the obtained copolymers,in which both the noncyclic structural units bearing pendant allyl moiety(A)as well as acrylate moiety(B)and the cyclic structural units,y-butyrolactones(C)andδ-valerolactone(D)were ***,the content of different structural units of the produced copolymer could be tuned by adjusting the concentration of the ***,we also proved that the nick-el-based catalyst could produce related copolymers with significantly enhanced copolymer molecular weights in the copolymeriza-tion of allyl acrylate and ethylene compared with the palladium-based catalyst under the same conditions.

关键词： Coordination and insertion Copolymerization Nickel Polar monomer Polyolefin