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Bone Research 2024年第1期12卷 122-136页

作者： Nan-Yu Zou Ran Liu Mei Huang Yu-Rui Jiao Jie Wei Yangzi Jiang Wen-Zhen He Min Huang Yi-Li Xu Ling Liu Yu-Chen Sun Mi Yang Qi Guo Yan Huang Tian Su Ye Xiao Wei-Shan Wang Chao Zeng Guang-Hua Lei Xiang-Hang Luo Chang-Jun Li Department of Endocrinology Endocrinology Research CenterXiangya Hospital of Central South UniversityChangshaHunan 410008China Department of Orthopaedics Xiangya Hospital of Central South UniversityChangshaHunan 410008China Department of Epidemiology and Health Statistics Xiangya School of Public HealthCentral South UniversityChangshaChina Hunan Key Laboratory of Joint Degeneration and Injury ChangshaHunan 410008China Key Laboratory of Aging-related Bone and Joint Diseases Prevention and Treatment Ministry of EducationXiangya HospitalCentral South UniversityChangshaChina School of Biomedical Sciences Institute for Tissue Engineering and Regenerative MedicineFaculty of MedicineThe Chinese University of Hong KongHong Kong SARChina Department of Orthopaedics The First Affiliated Hospital of Shihezi UniversityShiheziXinjiangChina National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan 410008China

Skeletal stem/progenitor cell(SSPC)senescence is a major cause of decreased bone regenerative potential with aging,but the causes of SSPC senescence remain *** this study,we revealed that macrophages in calluses secrete prosenescent factors,including grancalcin(GCA),during aging,which triggers SSPC senescence and impairs fracture *** injection of human rGCA in young mice induced SSPC senescence and delayed fracture *** deletion of Gca in monocytes/macrophages was sufficient to rejuvenate fracture repair in aged mice and alleviate SSPC ***,GCA binds to the plexin-B2 receptor and activates Arg2-mediated mitochondrial dysfunction,resulting in cellular *** of Plxnb2 in SSPCs impaired fracture *** of GCA-neutralizing antibody enhanced fracture healing in aged ***,our study revealed that senescent macrophages within calluses secrete GCA to trigger SSPC secondary senescence,and GCA neutralization represents a promising therapy for nonunion or delayed union in elderly individuals.

关键词： healing union senescence

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一氧化二氮的光解动力学:O(^(1)D)+N_(2)(X^(1)∑_(g)^(+))产物通道

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Chinese Journal of Chemical Physics 2024年第2期37卷 286-294,I0103页

作者：杨帅康巫雨承罗子杰李振兴华伟常尧王兴安袁开军杨学明中国科学技术大学化学材料学院化学物理系合肥230026 中国科学院大连化学物理研究所分子反应动力学国家重点实验室大连光源科学研究室大连116023 大连海事大学轮机工程学院大连116026 合肥国家实验室合肥230088 南方科技大学理学院化学系和先进光源中心深圳518055

由于一氧化二氮(N_(2)O)在大气化学中的重要性,本文使用时间切片的离子速度成像技术重新研究了一氧化二氮在紫外吸收区域的光解离动力学.采用单色光测量了203.814nm和205.472nm光解产物O(^(1)D)的离子影像,以及采用双色光记录了从200到2... 详细信息

由于一氧化二氮(N_(2)O)在大气化学中的重要性,本文使用时间切片的离子速度成像技术重新研究了一氧化二氮在紫外吸收区域的光解离动力学.采用单色光测量了203.814nm和205.472nm光解产物O(^(1)D)的离子影像,以及采用双色光记录了从200到220nm范围八个光解波长下解离产物O(^(1)D)的图像.产物N_(2)(X^(1)∑_(g)^(+))碎片的转动态分布和各向异性参数的信息可以从图像中获取:实验结果表明,N_(2)产物的转动态分布发生反转,最大值在J≈70.随着N_(2)转动量子数J增加,各向异性参数β表现出两次显著的下降.根据前人的理论计算[J,***.136,044314(2012)],初始线性构型的轴向反冲程度的不同导致了β随J的变化.然而,在高J区域,非绝热跃迁之后的基态势能面上存在额外的扭矩,从而引起额外的转动激发和较低的β值.采用真空紫外单光子电离O(^(1)D)原子的双色实验能够准确地获得产物的转动态分布和角分布.该工作加深了对三原子分子光解机制的进一步理解.

关键词：紫外光解离一氧化二氮离子速度成像非绝热

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Simultaneous achievement of large electrocaloric effect and ultrawide operating temperature range in BaTiO_(3)-based lead-free ceramic

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Journal of Advanced Ceramics 2024年第8期13卷 1234-1241页

作者： Zhaojie Wang Yingzhi Meng Silin Tang Xiang Niu Hongfang Zhang Dingyuan Wang Yisong Bai Bialin Peng Xue Chen Qingqing Ke Sheng-Guo Lu Laijun Liu Guangxi Key Lab of Optical and Electronic Functional Materials and Devices Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of ResourcesCollege of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China School of Microelectronics Science and Technology Sun Yat-sen UniversityZhuhai 519082China Guangdong Provincial Research Center on Smart Materials and Energy Conversion Devices School of Materials and EnergyGuangdong University of TechnologyGuangzhou 510006China School of Physical Science and Technology&Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of china Suzhou University of Science and TechnologySuzhou 215009China Qingdao Haier Smart Technology R&D Co. Ltd.Qingdao 266100China School of Advanced Materials and Nanotechnology Xidian UniversityXi'an 710071China Guangxi Key Laboratory of Manufacturing System&Advanced Manufacturing Technology Guilin University of Electronic TechnologyGuilin 541004China

The electrocaloric effect(ECE),known for its environmentally friendly characteristics,holds significant promise for advancing next-generation solid-state refrigeration *** a large ECE along with a wide working temperature range near room temperature remains a key developmental *** this study,we successfully obtained a substantial ECE of 1.78 K and an extensive working temperature range of 103 K(AT>1.52 K)near room temperature in CaZrO_(3)-modified BaTiO_(3) lead-free ferroelectric ***,this achievement was verified using direct *** piezoresponse force microscopy(PFM)results suggest that the broad temperature range is attributed to the formation of ferroelectric microdomains and polar nanoregions(PNRs).Furthermore,X-ray photoelectron spectroscopy(XPS)and ultraviolet-visible(UV-Vis)spectroscopy reveal a decrease in the oxygen vacancy concentration and an increase in the bandgap for higher CaZrO_(3) doping *** changes synergistically enhance the maximum applied electric field,helping to achieve a high-performance EcE near room *** research presents a straightforward and effective approach for achieving high-performance ECEs in BaTiOg lead-free ceramics,offering promising prospects for application in next-generation solid-state refrigeration technologies.

关键词： BaTiO_(3) electrocaloric effect oxygen vacancy band-gap

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Highly ordered inkjet-printed quantum-dot thin films enable efficient and stable QLEDs with EQE exceeding 23%

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eScience 2024年第3期4卷 152-162页

作者： Changting Wei Bo Xu Meng Zhang Zhenhuang Su Jiawei Gu Wenrui Guo Xingyu Gao Wenming Su Zheng Cui Seokwoo Jeon Zhiyong Fan Haibo Zeng MIIT Key Laboratory of Advanced Display Materials and Devices Institute of Optoelectronics&NanomaterialsSchool of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Ningbo Nato New Material Technology Co. LtdNingbo 315600China Shanghai Synchrotron Radiation Facility(SSRF) Zhangjiang LaboratoryShanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China School of Mechanical Engineering Jiangsu UniversityZhenjiang 212013China Printable Electronics Research Center Nano Devices and Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Department of Materials Science and Engineering Korea UniversitySeoul 02841South Korea Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China

Inkjet-printed quantum dot light-emitting diodes(QLEDs)are emerging as a promising technology for next-generation ***,the progress in fabricating QLEDs using inkjet printing technique has been slower compared to spin-coated devices,particularly in terms of efficiency and *** key to achieving high performance QLEDs lies in creating a highly ordered and uniform inkjet-printed quantum dot(QD)thin *** this study,we present a highly effective strategy to significantly improve the quality of inkjet-printed CdZnSe/CdZnS/ZnS QD thin films through a pressure-assisted thermal annealing(PTA)*** from this PTA process,a high quality QD thin film with ordered packing,low surface roughness,high photoluminescence and excellent electrical property is *** mechanism behind the PTA process and its profound impact on device performance have been thoroughly investigated and ***,a record high external quantum efficiency(EQE)of 23.08%with an impressive operational lifetime(T50)of up to 343,342h@100cdm−2,and a record EQE of 22.43%with T50 exceeding to 1,500,463h@100cdm−2 are achieved in inkjet-printed red and green CdZnSe-based QLEDs,*** work highlights the PTA process as an important approach to realize highly efficient and stable inkjet-printed QLEDs,thus advancing QLED technology to practical applications.

关键词： Inkjet printing Quantum dot light-emitting diode High efficiency Thermal annealing Highly ordered

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An effective method to screen sodium-based layered materials for sodium ion batteries

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npj Computational Materials 2018年第1期4卷 560-565页

作者： Xu Zhang Zihe Zhang Sai Yao An Chen Xudong Zhao Zhen Zhou School of Materials Science and Engineering National Institute for Advanced MaterialsComputational Centre for Molecular ScienceInstitute of New Energy Material ChemistryCollaborative Innovation Center of Chemical Science and Engineering(Tianjin)Nankai UniversityTianjin 300350China

Due to the high cost and insufficient resource of lithium,sodium-ion batteries are widely investigated for large-scale ***,insertion-type materials possess better cyclic stability than alloy-type and conversion-type ***,in this work,we proposed a facile and effective method to screen sodium-based layered materials based on Materials Project database as potential candidate insertion-type materials for sodium ion *** obtained Na-based layered materials contains 38 kinds of space group,which reveals that the credibility of our screening approach would not be affected by the space ***,some important indexes of the representative materials,including the average voltage,volume change and sodium ion mobility,were further studied by means of density functional theory *** materials with extremely low volume changes and Na diffusion barriers are promising candidates for sodium ion *** believe that our classification algorithm could also be used to search for other alkali and multivalent ion-based layered materials,to accelerate the development of battery materials.

关键词： layered insertion sodium

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Particle contact angle at the oil-water interface: Effect of surface silanization

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Particuology 2019年第3期17卷 218-224页

作者： Keliang Wang Gang Wang Chunjing Lu Key Laboratory of Enhanced Oil Recovery of Ministry Education Northeast Petroleum University Daqing 163000 China

A novel and efficient method was developed to vary the particle contact angle (θ) at the wax-water interface by tailoring the degree of Υ-aminopropyltriethoxysilane (APTES) grafting onto silica *** three-phase θ determines the degree of particle penetration into the respective *** the APTES grafting density of the silica particles resulted in a three-phase θ increase from 22° to 70°.Furthermore,increasing APTES grafting density results in silica particles packing more closely and orderly on the surface of the wax colloidosomes.A series of fluorinated Janus particles were prepared by the subsequent surface chemical modification of the modified silica particles adsorbed on the wax *** particles with tailored APTES grafting densities can be utilized to tune the Janus balance during the synthesis of Janus particles based on Pickering emulsion methods.

关键词： Janus particles Surface modification Aminopropyltriethoxysilane Pickering emulsions Contact angle

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Improving CNT-Si solar cells by metal chloride-to-oxide transformation

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Nano Research 2020年第2期13卷 543-550页

作者： Huaisheng Wu Xuewei Zhao Yizeng Wu Qinghuan Ji Linxiu Dai Yuanyuan Shang Anyuan Cao Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China School of Physical and Microelectronics Zhengzhou UniversityZhengzhou 450052China

Transitional metal oxides(TMOs)are important functional materials in silicon-based and thin-film ***,TMOs areapplied in carbon nanotube(CNT)-Si solar cells by spin-coating solutions of metal chlorides that undergo favorable transformation in ambient *** unconventional change in solar cell behavior is observed after coating two particular chlorides(MoCl,and WCls,respectively),characterized by an initial severe degradation followed by gradual recovery and then well surpassing the original *** analysis reveals that the formation of correspondina oxides(MoOa and WO.)enables two primary functions on both CNTs(p-type doping)and Si(inducing inversion layer),leading to significant improvement in open-circuit voltage and fill factor,with power conversion efficiencies up to 13.0%(MoOg)and 13.4%(WOg).Further combining with other chlorides to increase the short-circuit current,ultimate cells efficiencies achieve>16%with over 90%retention after 24 h,which are among the highes stable efficiencies reported for CNT-Si solar *** transformation of functional layers as demonstrated here has profoundinfluence on the device characteristics,and represents a potential strategy in low-cost manufacturing of next-generation high efficiency photovoltaics.

关键词： carbon nanotube(CNT)-Si solar cell chloride to oxide transformation MoO3 and WO3 inversion layer

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Pulse-shaping method for real-time neutron/gamma discrimination at low sampling rates

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Nuclear Science and Techniques 2023年第11期34卷 51-63页

作者： Jia‑Xin Li Hui‑Liang Hou Yue‑Feng Huang Mao‑Song Cheng Zhi‑Min Dai Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

The Na I:Tl scintillator is an innovative material for dual-gamma-ray and neutron detection with a low ^(6)Li *** achieve real-time n/γ discrimination,a zero-crossing time comparison algorithm based on trapezoidal pulse shaping was *** algorithm can operate efficiently at low sampling rates and was implemented on a single-probe portable digital n/γ discriminator based on a field-programmable gate *** discriminator and Na I:Tl,^(6)Li detector were tested in a neutron-gamma mixed field produced by an ^(241)Am-Be neutron source to evaluate the performance of the *** figure of merits was measured as 2.88 at a sampling rate of 50 MHz,indicating that the discriminator with its embedded algorithm has a promising n/γ discrimination *** discrimination at sampling rates of 40 and 25 MHz demonstrates that the capability of this method is not limited by low sampling rates.

关键词： FPGA NaI:Tl ^(6)Li Real time Neutron/gamma discrimination Pulse shaping

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Visually monitoring the etching process of gold nanoparticles by KI/12 at single-nanoparticle level using scattered-light dark-field microscopic imaging

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Nano Research 2016年第4期9卷 1125-1134页

作者： Shanshan Sun Mingxuan Gao Gang Lei Hongyan Zou Jun Ma Chengzhi Huang Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University) Ministry of Education College of Chemistry and Chemical Engineering Southwest University Chongqing 400715 China College of Pharmaceutical Sciences Southwest University Chongqing 400716 China

Real-time monitoring of reaction processes is helpful for understanding the reaction mechanisms. In this study we investigated the etching mechanism of gold nanopartides （AuNPs） by iodine on a single-nanopartide level because AuNPs have become important nanoprobes with applications in sensing and bioimaging fields owing to their specific localized surface plasmon resonance （LSPR） properties. By using a scattered-light dark-field microscopic imaging （iDFM） technique, the in situ KI/I2-treated etching processes of various shapes of AuNPs, including nanospheres （AuNSs）, nanorods （AuNRs）, and nanotrigonal prisms （AuNTs）, were monitored in real time. It was found that the scattered light of the different shapes of AuNPs exhibited noticeable color changes upon exposure to the etching solution. The scattering spectra during the etching process showed obvious blue-shifts with decreasing scattered intensity owing to the oxidation of Au atoms into [AuI2]-. Both finite-difference time-domain （FDTD） simulations and monitoring of morphological variations proved that the etching was a thermodynamic-dependent process through a chamfering mechanism coupled with layer-by-layer peeling, resulting in isotropic spheres with decreased particle sizes.

关键词： gold nanopartides dark-field imaging etching mechanism scattered light

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Study on the Hydrophobic Property of Shark-Skin-Inspired Micro-Riblets

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Journal of Bionic Engineering 2014年第2期11卷 296-302页

作者： Danyang Zhao Qianqian Tian Minjie Wang Yifei Jin Key Laboratory for Precision & Non-Traditional Machining Technology of Ministry of Education Dalian University of Technology Dalian 116024 P. R. China

This paper aims to characterize the hydrophobic property of shark-skin-inspired riblets with potential engineering appli- cations. Based on the hydrophobic theory, a new hydrophobic model which is consistent with the special structure of shark-skin-inspired micro-riblets was proposed. Then, the contact angles of different droplets were measured by optical contact angle measuring device on the shark-skin-inspired micro-riblets and the smooth surface, respectively. The results show that the surface of micro-riblets possesses obvious hydrophobicity, and the actual contact angles of different droplets residing on the riblets decrease with the increase in the droplet volume. According to the new hydrophobic model and the measurement of contact angle, it was found that the arrangement and structure of the shark-skin-inspired micro-riblets significantly affect the surface hydrophobic property. Using the new hydrophobic model, the prediction error of contact angle can be less than 3% compared with the measured one. The research on hydrophobic property of biomimetic micro-riblets is proved to be necessary and important to well explain drag reduction and microbe-resistant property of micro-riblets.

关键词： hydrophobic property micro-riblet contact angle shark skin

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