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tailoring the surface chemical bond states of the NbN coatings by doping Ag:impact the tribological behavior and wettability

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Tailoring the surface chemical bond states of the NbN coatin...

Zone-Resolved Photoelectronic Scoping of the Local Bonding and Electronic Dynamics at the Graphite Skin with and without Atomic Vacancy

中国晶体学会第六届学术年会暨会员代表大会——多晶（粉晶）衍射分会

作者： P.Ren M.wen S.X.Du K.Zhang w.t.zheng Department of Materials Science Jilin University

there has been much emphasis in the high hardness,robust hydrophobic and excellent tribological behavior for transition metal nitrides when which as protective coating materials exposed to *** this work,the Nb(Ag)N coatings were deposited on Si(100)substrates by reactive co-sputtering,in which the Nb atoms were substituted by the Ag atoms as Ag/Nb ratio(R) increases from 0.01 to *** coatings exhibit the high hardness(8GPa),low coefficient of friction(CoF,0.18) and wear rates(0.41×10 mm Nm),also with the high hydrophobic property(water contact angle(wCA),-119°).Significantly,a detailed investigation both in experiment and theoretical calculation were employed to reveal the relationship between the micro structure and the excellent trobological behavior and high *** the R increased from 0 to 0.15,the coatings transformed from NbN to NbN/Ag solute nanostructure ***,the CoF deceased from 0.67 to 0.18 and the wear-rate reduced,which can be ascribed to the AgNbO tribo-film rapidly formed during friction due to the reducing of the N desorption activation energy as R *** increasing R to 0.26,the lubricating effects became weaker because the Ag nanoinclusions segregation at NbN grain boundaries cause the restraint of information for AgNbO,finally result in the increased in the *** the NbN/Ag solute nanostructure coatings(0.01 with high wCAs(10319°) can be ascribed to the surface silver ions(Ag) in the AgO have a special closed shells structure of the electron(4d5s),leading a less number of the polar sites for the hydrogen bonding with interfacial water molecules on the surface of ***,wCA of the NbN/Ag coating decreased to 96° as R up to 0.26,these also can be attributed to the Ag separated from the supersaturated NbN lattice accompanied by the decreasing of AgO contents on the surface of the *** all,as increased of Ag content,the fomation of solute nanostructures in the coatings

关键词： NbN/Ag coating Solute nanostructures Microhardness Hydrophobic Friction and wear

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Zone-Resolved Photoelectronic Scoping of The Local Bonding a...

Superconductivity in Hfte5 across weak to strong topological insulator transition induced via pressures

第三届亚洲光谱会议

作者： Y.G.Nie J.S.Pan X.Zhang S.Z.Ma w.t.zheng C.Q.Sun School of Electrical and Electronic Engineering Nanyang Technological University Institute of Materials Research and Engineering School of Materials Science Jilin University Faculty of Materials Photoelectronics and PhysicsXiangtan University

＜正＞A zone-resolved photoelectron spectroscopy（ZPS）has enabled us to gain the local and quantitative information,and hence confirm our theoretical expectations,about the bonding and electronic dynamics at graphite skin with and without atomic vacancy *** technique has revealed:i)the 1s energy level for an isolated

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Superconductivity in HfTe5 across weak to strong topological...

t cell interactions with microglia in immune-inflammatory processes of ischemic stroke

中国晶体学会第六届学术年会暨会员代表大会（极端条件晶体材料分会）

作者： Y.Liu Y.J.Long L.X.Zhao S.M.Nie S.J.Zhang Y.X.weng M.L.Jin w.M.Li Q.Q.Liu Y.w.Long R.C.Yu C.Z.Gu F.Sun w.G.Yang H.K.Mao X.L.Feng Q Li w.t.zheng H.M.weng X.Dai Z.Fang G.F.Chen C.Q.Jin Institute of Physics Chinese Academy of Sciences Center for High Pressure Science & technology Advanced Research Department of Materials Science Jilin University Collaborative Innovation Center of Quantum Matter

Recently,theoretical studies show that layered Hf te5is at the boundary of weak&strong topological insulator(tI)and might crossover to a Dirac semimetal state by changing lattice *** topological properties of 3D stack...

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Neural Regeneration Research 2025年第5期20卷 1277-1292页

作者： Yuxiao zheng Zilin Ren Ying Liu Juntang Yan Congai Chen Yanhui He Yuyu Shi Fafeng Cheng Qingguo wang Changxiang Li Xueqian wang School of traditional Chinese Medicine Beijing University of Chinese MedicineBeijingChina Library Beijing University of Chinese MedicineBeijingChina Dongzhimen Hospital Beijing University of Chinese MedicineBeijingChina

the primary mechanism of secondary injury after cerebral ischemia may be the brain inflammation that emerges after an ischemic stroke,which promotes neuronal death and inhibits nerve tissue *** the first immune cells to be activated after an ischemic stroke,microglia play an important immunomodulatory role in the progression of the *** an ischemic stroke,peripheral blood immune cells(mainly t cells)are recruited to the central nervous system by chemokines secreted by immune cells in the brain,where they interact with central nervous system cells(mainly microglia)to trigger a secondary neuroimmune *** review summarizes the interactions between t cells and microglia in the immune-inflammatory processes of ischemic *** found that,during ischemic stroke,t cells and microglia demonstrate a more pronounced synergistic ***1,th17,and M1 microglia can co-secrete proinflammatory factors,such as interferon-γ,tumor necrosis factor-α,and interleukin-1β,to promote neuroinflammation and exacerbate brain ***2,treg,and M2 microglia jointly secrete anti-inflammatory factors,such as interleukin-4,interleukin-10,and transforming growth factor-β,to inhibit the progression of neuroinflammation,as well as growth factors such as brain-derived neurotrophic factor to promote nerve regeneration and repair brain *** interactions between microglia and t cells influence the direction of the subsequent neuroinflammation,which in turn determines the prognosis of ischemic stroke *** trials have been conducted on the ways to modulate the interactions between t cells and microglia toward anti-inflammatory communication using the immunosuppressant fingolimod or overdosing with treg cells to promote neural tissue repair and reduce the damage caused by ischemic ***,such studies have been relatively infrequent,and clinical experience is still *** summary,in ischemic stroke,t cell subsets and activated micro

关键词： brain immune inflammation interaction ischemic stroke mechanism microglia neuron secondary injury t cells

Defect Engineering with Rational Dopants Modulation for High-temperature Energy Harvesting in Lead-Free Piezoceramics

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NANO-MICRO LEttERS 2025年第1期17卷 1-15页

作者： Xi, Kaibiao Guo, Jianzhe zheng, Mupeng Zhu, Mankang Hou, Yudong Beijing Univ technol Coll Mat Sci & Engn Key Lab Adv Funct Mat Minist Educ Beijing 100124 Peoples R China

High temperature piezoelectric energy harvester (Ht-PEH) is an important solution to replace chemical battery to achieve independent power supply of Ht wireless sensors. However, simultaneously excellent performances, including high figure of merit (FOM), insulation resistivity (rho) and depolarization temperature (t-d) are indispensable but hard to achieve in lead-free piezoceramics, especially operating at 250 degrees C has not been reported before. Herein, well-balanced performances are achieved in BiFeO3-BatiO3 ceramics via innovative defect engineering with respect to delicate manganese doping. Due to the synergistic effect of enhancing electrostrictive coefficient by polarization configuration optimization, regulating iron ion oxidation state by high valence manganese ion and stabilizing domain orientation by defect dipole, comprehensive excellent electrical performances (t-d = 340 degrees C, rho(250) (degrees C) > 10(7) Omega cm and FOM2(50 degrees C) = 4905 x 10(-15 )m(2) N-1) are realized at the solid solubility limit of manganese ions. the Ht-PEHs assembled using the rationally designed piezoceramic can allow for fast charging of commercial electrolytic capacitor at 250 degrees C with high energy conversion efficiency (eta = 11.43%). these characteristics demonstrate that defect engineering tailored BF-Bt can satisfy high-end Ht-PEHs requirements, paving a new way in developing self-powered wireless sensors working in Ht environments.

关键词： Lead-free piezoceramic Defect engineering Dopants modulation High-temperature Piezoelectric energy harvester

High-magnetic-field induced charge order in high-t_c cuprate superconductors

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Chinese Physics B 2019年第11期28卷 25-42页

作者： L X zheng J Li t wU Hefei National Laboratory for Physical Science at Microscale University of Science and Technology of ChinaHefei 230026China Key Laboratory of Strongly-coupled Quantum Matter Physics University of Science and Technology of ChinaChinese Academy of SciencesHefei 230026China CAS Center for Excellence in Superconducting Electronics(CENSE) Shanghai 200050China CAS Center for Excellence in Quantum Information and Quantum Physics Hefei 230026China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

In the last few years, charge order and its entanglement with superconductivity are under hot debate in high-tc community due to the new progress on charge order in high-tc cuprate superconductors YBa2Cu3O6+x. Here, we will briefly introduce the experimental status of this field and mainly focus on the experimental progress of high-field nuclear magnetic resonance(NMR) study on charge order in YBa2Cu3O6+x. the pioneering high-field NMR work in YBa2Cu3O6+x sets a new stage for studying charge order which has become a ubiquitous phenomenon in high-tc cuprate superconductors.

关键词： charge order cuprates nuclear magnetic resonance YBa2Cu3O6+x superconductors competing order

Peripheral blood RNA biomarkers can predict lesion severity in degenerative cervical myelopathy

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Neural Regeneration Research 2025年第6期20卷 1764-1775页

作者： Zhenzhong zheng Jialin Chen Jinghong Xu Bin Jiang Lei Li Yawei Li Yuliang Dai Bing wang Department of Spine Surgery The Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina

Degenerative cervical myelopathy is a common cause of spinal cord injury,with longer symptom duration and higher myelopathy severity indicating a worse *** numerous studies have investigated serological biomarkers for acute spinal cord injury,few studies have explored such biomarkers for diagnosing degenerative cervical *** study involved 30 patients with degenerative cervical myelopathy(51.3±7.3 years old,12 women and 18 men),seven healthy controls(25.7±1.7 years old,one woman and six men),and nine patients with cervical spondylotic radiculopathy(51.9±8.6 years old,three women and six men).Analysis of blood samples from the three groups showed clear differences in transcriptomic *** analysis identified 128 differentially expressed genes that were enriched in patients with neurological *** least absolute shrinkage and selection operator analysis,we constructed a five-gene model(tBCD,tPM2,PNKD,EIF4G2,and AP5Z1)to diagnose degenerative cervical myelopathy with an accuracy of 93.5%.One-gene models(tCAP and SDHA)identified mild and severe degenerative cervical myelopathy with accuracies of 83.3%and 76.7%,*** of two immune cell types(memory B cells and memory-activated CD4^(+)t cells)predicted levels of lesions in degenerative cervical myelopathy with 80%*** results suggest that peripheral blood RNA biomarkers could be used to predict lesion severity in degenerative cervical myelopathy.

关键词： biomarkers candidate genes degenerative cervical myelopathy gene expression analysis immune cell types neurological disabilities peripheral blood RNA profiles spinal cord injury

Spontaneous Orientation Polarization of Anisotropic Equivalent Dipoles Harnessed by Entropy Engineering for Ultra‑thin Electromagnetic wave Absorber

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Nano-Micro Letters 2025年第1期17卷 424-438页

作者： Honghan wang Xinyu Xiao Shangru Zhai Chuang Xue Guangping zheng Deqing Zhang Renchao Che Junye Cheng Liaoning Key Lab of Lignocellulose Chemistry and BioMaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefinerySchool of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034People’s Republic of China School of Life Science and Biotechnology Dalian University of TechnologyDalian 116024People’s Republic of China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077People’s Republic of China School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006People’s Republic of China Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsAcademy for Engineering&TechnologyFudan UniversityShanghai 200438People’s Republic of China Department of Materials Science Shenzhen MSU-BIT UniversityShenzhen 517182People’s Republic of China

the synthesis of carbon supporter/nanoscale high-entropy alloys(HEAs)electromagnetic response composites by carbothermal shock method has been identified as an advanced strategy for the collaborative competition engineering of conductive/dielectric *** migration modes within HEAs as manipulated by the electronegativity,valence electron configurations and molar proportions of constituent elements determine the steady state and efficiency of equivalent ***,enlightened by skin-like effect,a reformative carbothermal shock method using carbonized cellulose paper(CCP)as carbon supporter is used to preserve the oxygencontaining functional groups(O·)of carbonized cellulose fibers(CCF).Nucleation of HEAs and construction of emblematic shell-core CCF/HEAs heterointerfaces are inextricably linked to carbon metabolism induced by O·.Meanwhile,the electron migration mode of switchable electronrich sites promotes the orientation polarization of anisotropic equivalent *** virtue of the reinforcement strategy,CCP/HEAs composite prepared by 35%molar ratio of Mn element(CCP/HEAs-Mn_(2.15))achieves efficient electromagnetic wave(EMw)absorption of−51.35 dB at an ultra-thin thickness of 1.03 *** mechanisms of the resulting dielectric properties of HEAs-based EMw absorbing materials are elucidated by combining theoretical calculations with experimental characterizations,which provide theoretical bases and feasible strategies for the simulation and practical application of electromagnetic functional devices(e.g.,ultra-wideband bandpass filter).

关键词： High-entropy alloys Carbothermal shock Switchable electron migration modes Emblematic shell-core heterointerfaces Ultra-thin thickness

Capacitive micromachined ultrasound transducers for intravascular ultrasound imaging

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Microsystems & Nanoengineering 2020年第1期6卷 565-577页

作者： Jiaqi wang Zhou zheng Jasmine Chan John t.w.Yeow Department of Systems Design Engineering Faculty of EngineeringUniversity of WaterlooWaterlooON N2L 3G1Canada

Intravascular ultrasound(IVUS)is a burgeoning imaging technology that provides vital information for the diagnosis of coronary arterial diseases.A significant constituent that enables the IVUS system to attain high-resolution images is the ultrasound transducer,which acts as both a transmitter that sends acoustic waves and a detector that receives the returning *** the most mature form of ultrasound transducer available in the market,piezoelectric transducers have dominated the field of biomedical ***,there are some drawbacks associated with using the traditional piezoelectric ultrasound transducers such as difficulties in the fabrication of high-density arrays,which would aid in the acceleration of the imaging speed and alleviate motion *** advent of microelectromechanical system(MEMS)technology has brought about the development of micromachined ultrasound transducers that would help to address this *** from the advantage of being able to be fabricated into arrays with lesser complications,the image quality of IVUS can be further enhanced with the easy integration of micromachined ultrasound transducers with complementary metal-oxide-semiconductor(CMOS).this would aid in the mitigation of parasitic capacitance,thereby improving the ***,there are two commonly investigated micromachined ultrasound transducers,piezoelectric micromachined ultrasound transducers(PMUts)and capacitive micromachined ultrasound transducers(CMUts).Currently,PMUts face a significant challenge where the fabricated PMUts do not function as per their ***,CMUts with different array configurations have been developed for *** this paper,the different ultrasound transducers,including conventional-piezoelectric transducers,PMUts and CMUts,are reviewed,and a summary of the recent progress of CMUts for IVUS is presented.

关键词： piezoelectric transducers thereby