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Emergent properties at oxide interfaces controlled by ferroelectric polarization

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npj Computational Materials 2021年第1期7卷 1180-1193页

作者： Fan Ye yi Zhang Christopher Addiego mingjie Xu Huaixun Huyan Xiaobing Ren Xiaoqing Pan Frontier Institute of Science and Technology Xi’an Jiaotong UniversityXi’anShaanxiChina Materials Science and Engineering University of CaliforniaIrvineCAUSA School of Physics Sun Yat Sen UniversityGuangzhouChina Department of Physics and Astronomy University of CaliforniaIrvineCAUSA Irvine Materials Research Institute University of CaliforniaIrvineCAUSA Center for Functional Materials National Institute for Materials ScienceTsukubaJapan

Ferroelectric materials are characterized by the spontaneous polarization switchable by the applied fields,which can act as a“gate”to control various properties of ferroelectric/insulator *** we review the recent studies on the modulation of oxide hetero-/homo-interfaces by ferroelectric *** discuss the potential applications of recently developed four-dimensional scanning transmission electron microscopy and how it can provide insights into the fundamental understanding of ferroelectric polarization-induced phenomena and stimulate future computational ***,we give the outlook for the potentials,the challenges,and the opportunities for the contribution of materials computation to future progress in the area.

关键词： polarization ferroelectric oxide

A Boron-based Adhesion Aid for Efficient Bonding of Silicone Rubber and Epoxy Resin

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Journal of Wuhan University of Technology(Materials Science) 2023年第3期38卷 718-724页

作者：王安东 ZHOU Peng TANG Xiaolin yi Shengping ZENG Qihui ZHANG Zhiqiang HU mingjie 廖俊黄驰 College of Chemistry and Molecular Sciences Wuhan UniversityWuhan 430072China Hubei Key Laboratory of Advanced Aerospace Propulsion Technology Wuhan 430040China Advanced Technology Research Institute(Jinan) Beijing Institute of TechnologyJinan 250300China

We improved the adhesion between silicon based insulating materials and epoxy resin composites by adding the adhesion promoter cycloborosiloxane(BSi,cyclo-1,3,3,5,7,7-hexaphenyl-1,5-diboro-3,7-disiloxane).The experimental results show that the addition of BSi in the silicone rubber(SR)system significantly increases the tensile shear strength between BSi and epoxy resin(EP),reaching 309%of the original *** this basis,the mechanism of BSi to enhance the adhesion effect was *** electron deficient B in BSi attracted the electron rich N and O in EP to enhance the chemical interaction,combined with the interfacial migration behavior in the curing process,to improve the adhesion *** study provides the design and synthesis ideas of adhesive aids,and a reference for further exploring the interface mechanism of epoxy resin matrix composites.

关键词： boron based adhesion promoter epoxy resin composites silicone rubber adhesion mechanism

藏北尼阿木底遗址发现的似阿舍利石器——兼论晚更新世人类向青藏高原的扩张

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人类学学报 2018年第2期37卷 253-269页

作者：王社江张晓凌陈祖军仪明洁葛俊逸达娃何伟张建林栗静舒洛桑哈比卜李林辉高星中国科学院古脊椎动物-9古人类研究所中国科学院脊椎动物演化与人类起源重点实验室北京100044 中国科学院生物演化与环境卓越创新中心北京100044 西藏自治区文物保护研究所拉萨850000 中国人民大学历史学院北京100872 西藏那曲地区文物局那曲852000 陕西省考古研究院西安710054 西藏阿里地区文物局阿里859000

2013年夏,在藏北那曲地区申扎县羌塘高原旧石器调查中,从规模恢弘的尼阿木底遗址地表暴露的、数以万计的石制品中,分别采集到似阿舍利类型"手斧"9件和"薄刃斧"2件。本文对尼阿木底遗址所见的这类器物进行了细致的观察与分析,认为它们只... 详细信息

2013年夏,在藏北那曲地区申扎县羌塘高原旧石器调查中,从规模恢弘的尼阿木底遗址地表暴露的、数以万计的石制品中,分别采集到似阿舍利类型"手斧"9件和"薄刃斧"2件。本文对尼阿木底遗址所见的这类器物进行了细致的观察与分析,认为它们只是旧石器时代晚期勒瓦娄哇技术产品的石核,或偶尔为之的、与手斧和薄刃斧形似的石制品,并非真正意义上的手斧与薄刃斧。尼阿木底遗址不存在从选料、剥片、加工出成品,到使用、损坏和废弃等各个阶段的、明确的阿舍利类型石器工业产品生产体系的工艺链条,换言之,在尼阿木底生活的古人脑海中,并不存在一个加工阿舍利类型手斧和薄刃斧等工具的"概念模板"(Mental template)。联系到青藏高原其他地区以前所报道的同类材料,我们认为在青藏高原腹地目前所见的旧石器遗址中,还没有真正意义上的阿舍利石器工业类型的遗存。晚更新世末期时,来自于印巴次大陆方向的早期占领者,沿着喜马拉雅山脉、冈底斯山脉和昆仑山脉三条东西走向的巨大山系之间的通道,自高原西南方向开始向高原腹地扩张,其间阿舍利石器工业技术在非洲和欧亚大陆早已消弭,当时的青藏高原腹地并不具备重新产生该类石器工业技术的土壤。

关键词：青藏高原申扎县尼阿木底晚更新世旧石器遗存手斧与薄刃斧

Dissection of environmental and physiological effects on the temperature difference between superior and inferior spikelets within a rice panicle

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The Crop Journal 2021年第5期9卷 1098-1107页

作者： yi Li Qianlan Zhou mingjie He Hongfa Xu Ganghua Li Yanfeng Ding Matthew Paul Zhenghui Liu College of Agriculture Nanjing Agricultural UniversityNanjing 210095JiangsuChina Collaborative Innovation Center for Modern Crop Production Nanjing Agricultural UniversityNanjing 210095JiangsuChina Plant Sciences Rothamsted ResearchHarpendenHertfordshire AL52JQUK

Temperature of a plant organ constitutes an integrative index to its eco-physiological properties and ***,little attempt has been made to dissect the combined effect of ecological and physiological factors on the surface temperature of a plant organ such as the rice *** this study,using a deactivated plant as reference,we developed a novel comparison method to dissect the environmental and physiological effects on temperature of rice *** japonica rice cultivars with contrasting canopy features were used as testing *** of flag leaf,superior and inferior spikelets and their diurnal rhythm during grain filling stage were precisely measured by a hand-held infrared *** results showed that the variation of environmental conditions within a panicle was relatively minor,posing a limited influence on temperature difference between the superior and inferior *** the other hand,it was the intrinsic physiological properties that considerably affected the spatial variations of spikelet temperature within a *** analysis of sucrose and starch in grains and bracts indicated that the superior spikelet is more physiologically active at photosynthetic assimilation and starch ***,sugar in bracts exhibited a pattern of diurnal changes similar to the source leaf but different from the sink grain,confirming that bracts are source organs for grain *** findings yield penetrating insight into the eco-physiological foundation of spikelet temperature,thus being helpful for the application of physiological approaches in crop breeding for cooler canopy.

关键词： Organ temperature Rice Superior spikelet Inferior spikelet Eco-physiological mechanism

Nonswellable hydrogels with robust micro/nano-structures and durable superoleophobic surfaces under seawater

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Science China Chemistry 2018年第1期61卷 64-70页

作者： Ling Lin Hui yi Xinglin Guo Pengchao Zhang Lie Chen Dezhao Hao Shutao Wang mingjie Liu Lei Jiang Engineering Research Center of Marine Biological Resource Comprehensive Utilization State Oceanic Administration (SOA) the Third Institute of Oceanography of the State Oceanic Administration Xiamen 361005 China Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and Environment Beihang University Beijing 100191 China Key Laboratory of Green Printing Institute of Chemistry Chinese Academy of Sciences Beijing 100191 China Laboratory of Bio-inspired Smart Interface Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100191 China

Hydrogels, composed mainly of water trapped in three dimensional cross-linked polymer networks, have been widely utilized to construct underwater superoleophobic surfaces. However, the swelling nature and instability of hydrogels under complex marine environment will weaken their underwater superoleophobicity. Herein, we synthesize structured poly （2-hydroxyethylmethacrylate）（PHEMA） hydrogels by using sandpaper as templates. The robust non-swelling of PHEMA hydrogel ensures that micro/nano-structures on the surface of PHEMA hydrogels can be well maintained. Moreover, when roughness Ra of about 3-4 bun, the surface has superior oil-repellency. Additionally, even after immersing in seawater for one-month, their breaking strength and toughness can be well kept. The non-swellable hydrogels with long-term stable under seawater superoleophobicity will promote the development of robust superoleophobic materials in marine antifouling coatings, biomedical devices and oil/water separation.

关键词： bio-inspired underwater superoleophobic micro/nano-structures nonswellable hydrogel mechanical strength

Wharton’s jelly MSC-derived extracellular vehicles-loaded hyaluronic acid-alginate adhesives for treatment of osteoarthritis

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Journal of Materials Science & Technology 2023年第11期142卷 240-252页

作者： Yanhong Zhao Xige Zhao Hainan Xu yi Xing Tengling Wu Xun Sun mingjie Kuang Xinlong Ma Wenguang Liu Qiang Yang School and Hospital of Stomatology Tianjin Medical UniversityTianjin 300070China School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300350China Department of Spine Surgery Tianjin HospitalTianjin UniversityTianjin 300211China Laboratory of Molecular Signaling and Stem Cells Therapy Molecular Laboratory for Gene Therapy and Tooth RegenerationBeijing Key Laboratory of Tooth Regeneration and Function ReconstructionCapital Medical University School of StomatologyBeijing 100050China Department of Orthopedics the Provincial Hospital Affiliated to Shandong UniversityShandong 250014China

The repair of cartilage injury caused by osteoarthritis(OA)has long plagued *** stem cell(MSC)-derived small extracellular vesicles(sEVs)show great potential in cartilage regeneration and immunoregulation to realise cell-free ***,unprotected sEVs are prone to be washed away by the flow of fluids and degraded in *** this work,we successfully revealed that human Wharton’s jelly of umbilical cord-derived MSC(hWJMSC)sEVs promote proliferation,inhibit apoptosis,and attenuate the inflammation of chondrocytes in *** light of the long period required for cartilage regeneration,we synthesised an injectable and adhesive aldehyded sodium alginate crosslinked acylhydrazide-modified hyaluronic acid(ALG-CHO/HHA)hydrogel loaded with sEVs to boost the reparative effect of the *** hydrogel-bearing sEVs was injected into cartilage defects where they adhered to the cartilage *** this configuration,the sEVs were delivered in a sustainable manner with the degradation of the hydrogel at the injury sites,thus contributing to highly efficient cartilage repair by regulating the regenerative and immune *** ALG-CHO/HHA-sEV platform meets the clinical demand for long-lasting repair with a single ***,this work provides a new idea and theoretical basis for the clinical application of sEVs in the treatment of OA.

关键词： Extracellular vesicles Hydrogel Osteoarthritis Cartilage regeneration

Understanding the impact of mountain landscapes on water balance in the upper Heihe River watershed in northwestern China

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Journal of Arid Land 2013年第3期5卷 366-383页

作者： Jia QIN YongJian DING JinKui WU mingjie GAO ShuHua yi ChuanCheng ZHAO BaiSheng YE Man LI ShengXia WANG State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences Division of Hydrology Water-Land Resources in Cold and Arid Regions Chinese Academy of Sciences

Estimating the impact of mountain landscape on hydrology or water balance is essential for the sus- tainable development strategies of water resources. Specifically, understanding how the change of each landscape influences hydrological components will greatly improve the predictability of hydrological responses to mountain landscape changes and thus can help the government make sounder decisions. In the paper, we used the VIC （Variable Infiltration Capacity） model to conduct hydrological modeling in the upper Heihe River watershed, along with a frozen-soil module and a glacier melting module to improve the simulation. The improved model performed satisfactorily. We concluded that there are differences in the runoff generation of mountain landscape both in space and time. About 50% of the total runoff at the catchment outlet were generated in mid-mountain zone （2,900-4,000 m asl）, and water was mainly consumed in low mountain region （1,700-2,900 m asl） because of the higher requirements of trees and grasses. The runoff coefficient was 0.37 in the upper Heihe River watershed. Barren landscape produced the largest runoff yields （52.46% of the total runoff） in the upper Heihe River watershed, fol- lowed by grassland （34.15%）, shrub （9.02%）, glacier （3.57%）, and forest （0.49%）. In order to simulate the impact of landscape change on hydrological components, three landscape change scenarios were designed in the study. Scenario 1, 2 and 3 were to convert all shady slope landscapes at 2,000-3,300 m, 2,000-3,700 m, and 2,000-4,000 m asl respectively to forest lands, with forest coverage rate increased to 12.4%, 28.5% and 42.0%, respectively. The runoff at the catchment outlet correspondingly declined by 3.5%, 13.1% and 24.2% under the three scenarios. The forest landscape is very important in water conservation as it reduced the flood peak and increased the base flow. The mountains as ＂water towers＂ play important roles in water resources generation and the impact of mountai

关键词： mountain landscape runoff modeling water balance VIC model Heihe River watershed

Functionalized graphene oxide based on p-phenylenediamine as spacers and nitrogen dopants for high performance supercapacitors

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Chinese Science Bulletin 2014年第16期59卷 1809-1815页

作者： Yanhong Lu yi Huang Fan Zhang Long Zhang Xi Yang Tengfei Zhang Kai Leng mingjie Zhang Yongsheng Chen School of Chemistry & Material Science Langfang Teachers College Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Key Laboratory of Functional Polymer Materials and Center for Nanoscale Science and TechnologyInstitute of Polymer ChemistryCollege of ChemistryNankai University

p-Phenylenediamine(PPD)functionalized graphene oxide(GO)materials(PPDG)were prepared through a one-step solvothermal process and their application as supercapacitors(SCs)were *** PPD is not only as the spacers to prevent aggregating and restacking of the graphene sheets in the preparing process but also as nitrogen sources to obtain the nitrogen-doped *** structures of PPDG were characterized by Fourier transformed infrared spectroscopy(FT-IR),X-ray diffraction spectroscopy(XRD),Raman spectroscopy and X-ray photoelectron spectroscopy(XPS)and the results show that the nitrogen-doped graphene was achieved with nitrogen content as high as 10.85 at.%.The field emission scanning electron microscopy(FE-SEM)and high resolution transmission electron microscopy(HR-TEM)have confirmed that the morphologies of PPDG were loose layered with less aggregation,indicating that PPD molecules,as spacers,effectively prevent the graphene sheets from restacking during the solvothermal *** special loose textures make PPDG materials exhibit excellent electrochemical performance for symmetric SCs with superior specific capacitance(313 F/g at 0.1 A/g),rate capability and cycling *** present synthesis method is convenient and may have potential applications as ultrahigh performance SCs.

关键词：电化学性能超级电容器对苯二胺氧化物官能化石墨氮源场发射扫描电子显微镜

Grazing alters environmental control mechanisms of evapotranspiration in an alpine meadow of the tibetan Plateau

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Journal of Plant Ecology 2019年第5期12卷 834-845页

作者： Tingting An mingjie Xu Tao Zhang Chengqun Yu yingge Li Ning Chen Jiaxing Zu Junxiang Li Juntao Zhu yi Sun Tingting Zhao Guirui Yu College of Agronomy Shenyang Agricultural UniversityShenyang 110866China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Peking University Shenzhen Graduate School Shenzhen 518055China

Aims Evapotranspiration(Et)is an important component of the terrestrial water cycle and is easily affected by external disturbances,such as climate change and *** Et responses to grazing is instructive for determining grazing activity and informative for understanding the water *** this study utilized 2 years(2014 and 2017)of eddy covariance data to test how grazing regulated Et for an alpine meadow ecosystem on the tibetan Plateau(tP)by path *** Findings Radiation dominated Et with a decision coefficient of 64-74%.the soil water content(SWc)worked as the limiting factor in the fenced ***,in the grazing site,the limiting factor was the vapor pressure deficit(VPD).Grazing had large effects on Et because it greatly affected the water *** SWc and VPD were enhanced by 14.63%and 4.36%in the grazing site,***,sufficient water was supplied to Et,especially during drought,and strengthened the transpiration *** a result,a favorable micrometeorological environment was created for *** shifted the limiting factor of Et from the SWc to VPD,which weakened the limiting effect of the water conditions on Et and advanced the Et peak *** addition,grazing altered the compositions of Et by changing the community structure,which directly resulted in an increased *** summary,grazing enhanced Et through altering the community structure and micrometeorological *** findings of this study further improve our understanding of the driving mechanisms of grazing on Et and will improve our predictions for the global water cycle.

关键词： grazing evapotranspiration environmental factors alpine meadow path analysis