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Interface dominated deformation transition from inhomogeneous to apparent homogeneous mode in amorphous/amorphous nanolaminates

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Journal of Materials science & Technology 2022年第4期99卷 178-183页

作者： Z.Q.Chen M.C.Li J.s.Cao F.C.Li s.w.guo B.A.sun H.B.Ke w.H.wang songshan Lake Materials Laboratory Dongguan 523808PR China Institute of Physics Chinese Academy of SciencesBeijing 100190PR China Institute of Materials Engineering Nanjing UniversityNantong 226019PR China school of Physics science and Technology Xinjiang UniversityXinjiang 830046PR China school of Physical sciences University of Chinese Academy of SciencesBeijing 100049PR China state Key Laboratory for Mechanical Behavior of Material Xi'an Jiaotong UniversityXi’an 710049PR China

The amorphous/amorphous nanolaminates(A/ANLs)have aroused great attentions owing to their tunable structure and enhanced mechanical ***,the plastic deformation mechanism of A/ANLs have yet been ***,we systematically examined the mechanical properties and deformation behavior of series of NiNb/ZrCuNi Al A/ANLs via nanoindentaion *** was found that both the amount and morphology of amorphous/amorphous interface(A/AIs)played crucial roles in the plastic deformation of A/*** and straighter A/AIs facilitated multiple shear banding deformation,of which the hardness increased with decreasing layer thickness,as the A/AIs hindered the propagation of shear bands(sBs).whilst,more and wavier A/AIs promoted homogeneous deformation,of which the hardness stayed at a much lower value and was relatively irrelevant with the layer thickness,for the promoted activation of shear transformation zones by A/*** results provide guidance for modifying the mechanical properties of amorphous alloys with interface engineering design.

关键词： Amorphous alloys Nanolaminates shear bands Hardness Interface

Hardening and toughening effects of intermediate nanosized structures in a confined amorphous alloy film

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Journal of Materials science & Technology 2022年第23期118卷 44-53页

作者： Z.Q.Chen M.C.Li X.Tong Y.Zhao J.Y.Xie s.w.guo P.Huang F.wang H.B.Ke B.A.sun w.H.wang songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China Xinjiang Key Laboratory of solid state Physics and Devices and school of Physical science and Technology Xinjiang UniversityXinjiangUrumqi 830046China Key Laboratory of LCR Materials and Devices of Yunnan Province School of Materials and EnergyYunnan UniversityKunming 650091China state-Key Laboratory for Mechanical Behavior of Material Xi’an Jiaotong UniversityXi’an 710049China state Key Laboratory for strength and Vibration of Mechanical structures Xi’an Jiaotong UniversityXi’an 710049China National Demonstration Center for Experimental Mechanics Education Xi’an Jiaotong UniversityXi’an 710049China

The plastic deformation of amorphous alloys is well known to be localized into shear bands(sBs),which are believed to stem from the atomic-scale flow defects,i.e.,shear transformation zones(sTZs).Yet,the bridge between the mesoscopic sBs and the atomic-scale sTZs remains poorly *** this work,through thermally activating pronouncedβrelaxations in the well-designed crystalline-layer confined amorphous(CLCA)Ni w alloy films,we experimentally captured and observed an intermediate nanosized structure termed as“nano shear bands”(NsBs)with a typical size of 1–2 nm in thickness and5–10 nm in *** influences of such NsB structures on the macroscale deformation behavior were systematically *** was found that NsBs lead to both hardening and toughening effects for the CLCA films,as they promote multiple and controlled shear banding deformation,which results in enhanced *** intermediate NsB structure could connect the microstructural characteristics and macroscopic plasticity in amorphous alloys and may provide new insights for understanding the microscopic deformation mechanism of amorphous alloys as well as tuning/designing their properties.

关键词： Amorphous alloys Nano shear band Hardening Toughening Crystallization

Innovations in metallurgical and materials processes:advancing liquid theory and honoring ***-jie guo's contributions to physical chemistry in metallurgy

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Journal of Iron and steel Research International 2024年第1期31卷 1-2页

作者： shuai Liu Jing guo Han-jie guo school of Artificial Intelligence Beijing Technology and Business UniversityBeijing100048China school of Metallurgical and Ecological Engineering University of Science and Technology Beijing(USTB)Beijing100083China

spanning three decades,***-jie guo's research group has dedicated itself to exploring the fundamental theories and practical applications of physical chemistry within the realm of *** under the assumption that molecul... 详细信息

关键词： chemistry liquid complexes

The centrosymmetric to non-centrosymmetric transformation induced by alkaline-earth cations producing infrared nonlinear optical AeMn_(6)Ga_(6)s_(16)(Ae=Ca,sr)

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science China Chemistry 2024年第9期67卷 2941-2948页

作者： Yang-Ping Zhang shao-Min Pei wen-Fa Chen Bin-wen Liu Xiao-Ming Jiang guo-Cong guo state Key Laboratory of structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China school of Physical science and Technology Shanghai Tech UniversityShanghai 201210China

Non-centrosymmetric(NCs)structure is an indispensable prerequisite for second-order nonlinear optical(NLO)***,the mainstream approach for designing new NCs structures still relies on chemical substitution,necessitating an urgent infusion of fresh *** this work,two isomorphic sulfides AeMn_(6)Ga_(6)s_(16)(Ae=Ca,1;sr,2)are afforded by modifying the skeleton of centrosymmetric(Cs)Mn_(2)Ga_(2)s_(5) via introducing strong electropositive alkaline-earth ***,the incorporation of Ca^(2+)/sr^(2+)cations allows the elementary[MnGas_(9)]_(∞)chains to reconfigure into bumpy[Mns_(6)]-[Gas_(4)]layers in a new engagement manner,thus enabling the conversion from Cs to NCs *** modifications cause not only strong second-harmonic generation(sHG)responses(~1.5×benchmark AgGas_(2)@1,700 nm),but also significantly feasible bandgaps(2.60-2.64 e V)compared to the sulfide Mn_(2)Ga_(2)s_(5)(1.36 e V),which ultimately facilitate ultrahigh laser-induced damage thresholds(4.4-6.6×AgGas_(2)@1,064 nm for compounds 1 and 2).The present study offers an ingenious approach for the transformation of Cs to NCs structure.

关键词： second-harmonic generation non-centrosymmetrical structure NLO functional motif solid-state method

Double-confined nanoheterostructure sb/sb_(2)s_(3)@Ti_(3)C_(2)T_(x)@C toward ultra-stable Li-/Na-ion batteries

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Rare Metals 2024年第5期43卷 2067-2079页

作者： Dan wang Qun Ma Huan He Zhi-Yuan wang Run-guo Zheng Hong-Yu sun Yan-guo Liu Chun-Li Liu school of Materials science and Engineering Northeastern UniversityShenyang110819China school of Resources and Materials Northeastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province Qinhuangdao 066004China Department of Physics and Oxide Research Center Hankuk University of Foreign StudiesYongin 17035Korea

Antimony-based materials with high capacities and moderate potentials are promising anodes for lithium-/-sodium-ion ***,their tremendous volume expansion and inferior conductivity lead to poor structural stability and sluggish reaction ***,a doubleconfined nanoheterostructure sb/sb_(2)s_(3)@Ti_(3)C_(2)T_(x)@C has been fabricated through a solvothermal method followed by low-temperature heat *** dual protection of“MXene”and“carbon”can better accommodate the volume expansion of sb/sb_(2)s_(3).The strong covalent bond(Ti-s,Ti-O-sb,C-O-sb)can firmly integrate sb-based material with Ti_(3)C_(2)T_(x)and carbon,which significantly improves the structure *** addition,the carbon layer can restrain the oxidation of MXenes,and the nano-sb/sb_(2)s_(3)can facilitate electron/ion transport and suppress the restacking of *** heterogeneous interface between sb and sb_(2)s_(3)can further promote interfacial charge *** MXene-sb/sb_(2)s_(3)@C-1 with the optimal sb content shows high specific capacities,comparable rate properties and ultra-stable cycling performances(250 m Ah·g^(-1)after 2500 cycles at 1 A·g^(-1)for sodium-ion batteries).Ex situ X-ray diffractometer(XRD)test reveals the storage mechanism including the conversion and alloying process of MXene-sb/sb_(2)s_(3)@*** voltammetry(CV)test results demonstrate that the pseudocapacitance behavior is dominant in MXene-sb/sb_(2)s_(3)@C-1,especially at large *** design paves the way for exploring high-performance alloy-based/conversion-type anode for energy storage devices.

关键词： sb/sb_(2)s_(3) MXene Carbon Anode Lithium-ion batteries sodium-ion batteries

Twisted fiber microfluidics:a cutting-edge approach to 3D spiral devices

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Microsystems & Nanoengineering 2024年第1期10卷 193-202页

作者： shunsuke Kato Daniel w.Carlson Amy Q.shen Yuanyuan guo Department of Electrical Information and Physics EngineeringSchool of EngineeringTohoku UniversityAoba-kuSendai 980-8579 MiyagiJapan Micro/Bio/Nanofluidics Unit Okinawa Institute of Science and TechnologyOnnaKunigami-gun 904-0495 OkinawaJapan Frontier Research Institute for Interdisciplinary sciences(FRIs) Tohoku UniversityAoba-kuSendai 980-0845 MiyagiJapan Graduate school of Biomedical Engineering Tohoku UniversityAoba-kuSendai 980-8579 MiyagiJapan Department of Physiology Graduate School of MedicineTohoku UniversityAoba-kuSendai 980-8575 MiyagiJapan

The development of 3D spiral microfluidics has opened new avenues for leveraging inertial focusing to analyze small fluid volumes,thereby advancing research across chemical,physical,and biological *** traditional straight microchannels rely solely on inertial lift forces,the novel spiral geometry generates Dean drag forces,eliminating the necessity for external fields in fluid ***,fabricating 3D spiral microfluidics remains a labor-intensive and costly endeavor,hindering its widespread ***,conventional lithographic methods primarily yield 2D planar devices,thereby limiting the selection of materials and geometrical *** address these challenges,this work introduces a streamlined fabrication method for 3D spiral microfluidic devices,employing rotational force within a miniaturized thermal drawing process,termed as *** innovation allows for rapid prototyping of twisted fiber-based microfluidics featuring versatility in material selection and heightened geometric *** validate the performance of these devices,we combined computational modeling with microtomographic particle image velocimetry(uTPiM)to comprehensively characterize the 3D flow *** results corroborate the presence of a steady secondary flow,underscoring the effectiveness of our *** 3D spiral microfluidics platform paves the way for exploring intricate microflow dynamics,with promising applications in areas such as drug delivery,diagnostics,and lab-on-a-chip systems.

关键词： thereby straight twisted

The pathogenesis of Parkinson’s disease and crosstalk with other diseases

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BIOCELL 2024年第8期48卷 1155-1179页

作者： TINGTING LIU DINGYOU guo JIANsHE wEI Institute for Brain sciences Research School of Life SciencesHenan UniversityKaifeng475004China

In China,Parkinson’s disease(PD)is the second most prevalent central nervous system(CNs)degenerative illness affecting middle-aged and older *** disorders including resting tremor,bradykinesia,myotonia,postural instability,and gait instability are the predominant clinical *** two main types of PD are sporadic and familial,with sporadic PD being the more prevalent of the *** environment,genetics,mitochondrial dysfunction,oxidative stress,inflammation,protein aggregation and misfolding,loss of trophic factors,cell death,and gut microbiota may all have a role in the etiology of *** is inversely connected with other cancers and positively correlated with COVID-19,diabetes mellitus(DM),melanoma,and ischemic heart disease(IHD)*** disease progression,managing motor and non-motor symptoms,and avoiding and controlling dysfunction in the middle and later phases of the disease are the key areas of research and development for its ***,the development and progression of PD can be slowed down by using conventional pharmacology,natural items,and innovative *** article reviews the pathogenesis of PD,its correlations with other non-genetic diseases,and the research progress of drugs and technologies for alleviating PD.

关键词： Parkinson’s disease Mitochondrial dysfunction Oxidative stress Inflammation Cancer Therapies

Effect of Eu3+,Bi3+,and Li+ doping on luminescent property of GdNbO4

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Journal of Rare Earths 2024年第1期42卷 66-75页

作者： s.w.wi Y.s.Lee Department of Physics and Integrative Institute of Basic sciences Soongsil University

we investigated the emission properties of Eu3+-doped GdNbO4-based oxide phosphors,aiming at improving the Eu3+emission by codoping of Bi3+and Li+.Eu3+singly doped,Eu3+and Bi3+doubly doped,and Eu3+,Bi3+,and Li+triply doped GdNbO4were prepared using a high-temperature solid-state reaction *** red-orange emissions from Eu3+in the singly doped samples are significantly improved by the codoping of Bi3+,mainly due to the energy transfer from Bi3+to Eu3+.The additional codoping of Li+is found to increase the Eu3+emission *** improvement might be attributed to the increase in the photoluminescent quantum yield originating from larger grain sizes and better crystallinity.A detailed analysis of the X-ray diffraction pattern and the asymmetric ratio estimated from the photoluminescence spectra show that the local lattice environment around Eu3+in GdNbO4does not change significantly with the codoping of Bi3+and Li+.Our results indicate that Li+doping is a promising way to improve the emission properties of rare-earth ion-doped GdNbO4phosphors.

关键词： Eu 3+ GdNbO 4 Codoping of Li + Photoluminescence sensitizer Rare earths

Vampyroteuthis pseudoinfernalis ***.:the second extant widespread deep sea squid species of Vampyromorpha(Cephalopoda:Coleoidea)

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Zoological systematics 2024年第3期49卷 246-257页

作者： Dajun Qiu Bilin Liu Yupei guo wijesooriya A.s.w.Lakmini Yehui Tan Gang Li Zhixin Ke Kaizhi Li Liangmin Huang CAs Key Laboratory of Tropical Marine Bio-resources and Ecology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of sciences Beijing 100049China College of Marine sciences Shanghai Ocean UniversityShanghai 200090China

The vampire squid,Vampyroteuthis infernalis Chun,1903,is currently the only extant species in the family Vampyroteuthidae Chun,***,specimens from the Gulf of Guinea,Africa,and California suggested the possibility of additional ***,we report the second species of Vampyroteuthis,collected from the south China sea,China,which differs from *** by its tail shape,lower beak,photophores position,and the phylogenetic analysis of mitochondrial COI and nuclear large subunit ribosomal DNA(LsU)sequences:*** present by the lacking of the tail,photophores located approximately one-third of the points between the fins and end,and the lower beak with a broad,short wing;*** Qiu,Liu&Huang,*** by an acuate tail,a pair of photophores located at the midpoints between the fins and tail,and a lower beak with a broad,elongate wing.

关键词： Nuclear gene mitochondrial COI phylogeny morphology south China sea