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Hole mobility enhancement in monolayer WSe2 p-type transistors through molecular doping

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Science China(Information Sciences) 2024年第6期67卷 207-213页

作者： Shiyuan LIU xiong xiong Xin WANG Xinhang SHI Ru HUANG Yanqing WU School of Integrated Circuits and Beijing Advanced Innovation Center for Integrated Circuits Peking University Wuhan National High magnetic Field Center and School of Integrated Circuits Huazhong University of Science and Technology

Two-dimensional （2D） transition metal dichalcogenide （TmDC） semiconductor materials exhibit extraordinary electrical properties,holding promise for the realization of next-generation complementary metal-oxide-semiconductor （CmOS） devices at ultimate ***,constrained by effective device doping strategies,the hole mobility and device performance of tungsten diselenide （WSe2） p-type transistors,especially monolayer chemical vapor deposition （CVD）-grown WSe2,have not met *** this paper,an effective performance enhancement of monolayer WSe2p-type transistor was achieved through a molecular doping *** monolayer WSe2directly on SiO2back-gated substrates and leveraging energy band alignment design,4-nitrobenzenediazonium tetrafluoroborate （4-NBD） molecular dopant with a concentration of 10 m m was utilized to modulate the Fermi level position of monolayer WSe2for hole *** devices demonstrated a more than 98%increase in hole mobility,reaching up to 97 cm2·V-1·s-1while maintaining the current on/off ratio of *** p-type WSe2transistors with 1μm channel length exhibit a high drive current surpassing 176μA·μm-1,exceeding previous CVD-WSe2devices with similar channel *** straightforward and effective approach to improving the electrical performance of WSe2transistors paves the way for advanced logic technologies based on transition metal dichalcogenide semiconductors.

关键词： CVD-grown WSe$_2$ molecular doping 4-NBD p-type transistors hole mobility

The microstructure characteristics and fracture behavior of the polyhedral primary iron-rich phase and plate-shaped eutectic iron-rich phase in a high-pressure die-cast AlSi10mnmg alloy

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Journal of materials Science & Technology 2023年第9期140卷 201-209页

作者： X.Y.Jiao Y.X.Liu J.Wang W.N.Liu A.X.Wan Stuart Wiesner S.m.xiong School of materials Science and Engineering Northeastern UniversityShenyang 110819China School of materials Science and Engineering Tsinghua UniversityBeijing 100084China Key Laboratory of Lightweight Structural materials Liaoning ProvinceNortheastern UniversityShenyang 110819China Key Laboratory for Advanced materials Processing Technology Tsinghua UniversityBeijing 100084China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Ein Unternehmen der ALUmINIUm RHEINFELDEN Group RHEINFELDEN 79618Germany

The characterization of multiple iron-rich phases in high-pressure die-cast AlSi10mnmg alloy was *** was focused on the formation and fracture behavior of the primary iron-rich phase((P-ImC)_(I))formed in the shot sleeve and plate-shaped eutectic iron-rich phase in high-pressure die cast(HPDC)AlSi10mnmg *** show that multiple types of iron-rich phases with various morphologies,in-cluding primary iron-rich phases(polyhedral(P-ImC)_(I) and(P-ImC)_(II))and eutectic iron-rich phases(plate-shaped,net shape,and fish-bone shape),were found in HPDC ***(P-ImC)_(I) formed in the shot sleeve were distributed in the interface between primaryα-Al and binary Al-Si *** size(P-ImC)_(II) and various eutectic iron-rich phases formed in the die cavity and they were distributed in Al-Si binary *** primary iron-rich phases belonged to a simple cubic crystal structure with a lattice constant a=1.265 nm and they exhibited a lateral growth characteristic with a termination of{110}surface.βphase was surrounded byδphase and they coexisted in a plate-shaped iron-rich ***-density stacking fault inβphase andδ/βinterface provided an excellent nucleation site forδ*** mechanical behavior,the stress concentration caused by eutectic iron-rich phases was far less than(P-ImC)_(I) and it would not cause crack initiation along the eutectic cluster *** addition,(P-ImC)_(I) showed the worst deformation coordination with primaryα-Al while the plate-shaped eutectic iron-rich phase exhibited similar deformation characteristics with silicon particles.

关键词： AlSi10mnmg High-pressure die casting multiple iron-rich phases

multi-layer hierarchical cellulose nanofibers/carbon nanotubes/vinasse activated carbon composite materials for supercapacitors and electromagnetic interference shielding

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Nano Research 2024年第3期17卷 904-912页

作者： Tianxu Wang Chuanyin xiong Yongkang Zhang Bo Wang Qing xiong mengjie Zhao Yonghao Ni College of Bioresources Chemical&materials Engineering Shaanxi University of Science and TechnologyXi’an 710021China Department of Chemical and biomedical Engineering The University of MaineOronoME 04469USA University of New Brunswick Limerick Pulp&Paper CtrFrederictonNB E3B 5A3Canada

Developing porous self-supporting electrodes with excellent conductivity,good mechanical properties,and high electrochemical activity is crucial for constructing electrode materials with lightweight,ultra-thin,flexible,and high capacitance *** this work,we prepared a cellulose nanofibers(CNFs)/carbon nanotubes(CNTs)/vinasse activated carbon(VAC)(CCV)composite material with a multi-layer hierarchical conductive structure through simple vacuum filtration and *** this composite material,the self-assembly of CNF provides the main skeleton structure of a multi-layer hierarchical *** provides a fast path for the rapid transfer of electrons and is beneficial for the loss of electromagnetic *** provides sufficient double layer *** synergistic effect of the above three endows CCV composite materials with excellent energy storage performance and electromagnetic interference(EmI)shielding *** addition,we endowed the CCV composite with a certain shape and performance by introducing a vitrimer polymer with a dynamic cross-linked network *** summary,thanks to the synergistic effect of various components in the multi-layer hierarchical structure,CCV composite materials exhibit excellent integration performance,especially stable energy storage performance and EmI shielding *** significant properties make CCV composite materials have great application prospects in the fields of energy storage and intelligent EmI shielding.

关键词： self-supporting electrodes multi-layer hierarchical structure supercapacitors electromagnetic interference shielding

Probing the interseismic locking state of the Xianshuihe fault based on a viscoelastic deformation model

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Science China Earth Sciences 2024年第1期67卷 134-145页

作者： Yage ZHU Faqi DIAO Fei CHEN Yuebing WANG Zhigang SHAO Rongjiang WANG xiong xiong Hubei Subsurface multi-Scale Imaging Key Laboratory School of Geophysics and GeomaticsChina University of GeosciencesWuhan 430074China China Earthquake Networks Center Beijing 100045China Institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China

The interseismic locking state of tectonic faults is essential for regional seismic hazard ***,it is challenging to obtain this parameter reliably due to the weak deformation and complex model *** better probe the fault locking state,more reliable physical models and well-covered observations are *** we investigate the locking state of the Xianshuihe fault based on a new-developed viscoelastic deformation ***,we combine GPS velocities from 13 new near-field stations and existing stations in this region to improve the spatial *** to the theoretical predictions,our results indicate that the elastic model will clearly overestimate the fault locking depth and seismic moment accumulation rate,and the fault slip rate inferred from the elastic model is slightly lower than that from the viscoelastic *** on the locking distribution inferred from the viscoelastic model,we identify four potential asperities on the Xianshuihe *** importantly,we find a clear spatial correlation between the fault locking distribution and the rupture extent of historical earthquakes,which indicates that the fault locking state may control the rupture extent and thus the magnitude of *** addition,our results show that the 2022 m6.8 Luding earthquake only ruptured the south part of a potential asperity,and the accumulated energy in the northern unruptured area is equivalent to an mw6.9 earthquake,where the seismic hazard deserves special attention.

关键词： Fault kinematics Viscoelastic relaxation effect GPS observations Seismic hazard The 2022 m6.8 Luding earthquake

Source model of the 2018 m_(w)7.5 Papua New Guinea earthquake constrained by InSAR measurements: Insight into a blind rupture beneath the New Guinea Highlands

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Geodesy and Geodynamics 2024年第4期15卷 315-325页

作者： Wei Chen Tianchen Sheng Wei xiong Key Laboratory of Earthquake Geodesy Institute of SeismologyChina Earthquake AdministrationWuhan 430071China Qinghai Provincial Basic Surveying and mapping Institute Xining 810001China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China

The Southern Highland Fold and Thrust Belt(SHFTB),the boundary of the Australian plate and the New Guinea Highland block,significantly contributes to the convergent deformation along the plate ***,due to the lack of observation data,the detailed slip pattern of the SHFTB and the orogenic mechanism beneath the New Guinea Highlands remains *** 25 February 2018,the m_(w)7.5 Papua New Guinea(PNG)earthquake struck the southeastern segment of the *** detailed rupture characteristics of this event is significant for further clarifying the inter-seismic slip pattern along the ***,the coseismic deformation field of this earthquake was obtained using high-resolution ALOS-2 satellite *** find that the 2018 m_(w)7.5 PNG earthquake ruptured a large-scaled fault(SHFTB)extending to the lower crust(deeper than 20 km)beneath the New Guinea Highlands,with a dip angle of 24°.The slips on the fault plane are equivalent to moment magnitudes of m_(w)*** major asperities with thrust-dominated slip of up to 3.94 m are detected on the fault *** finding implies that the slip pattern on the eastern segment of the SHFTB is dominated by thrust,rather than with significant sinistral movement,as previously *** tectonic deformation across the New Guinea Highlands is possibly concentrated on the large-scale fault SHFTB and primarily controls the intra-continental orogeny in the central Papua New Guinea.

关键词： 2018m_(w)7.5PapuaNewGuineaearthquake The Southern Highlands Fold-and-Thrust Belt InSAR Slipdistribution Seismicrisk

The pattern of cortical thickness underlying disruptive behaviors in Alzheimer’s disease

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Psychoradiology 2022年第3期2卷 113-120页

作者： Raymond m.xiong Teng Xie Haifeng Zhang Tao Li Gaolang Gong Xin Yu Yong He Experimental High School Attached to Beijing Normal University Beijing 100032China Dementia Care&Research Center Peking University Institute of Mental Health&National Clinical Research Center for Mental DisordersBeijing 100191China State Key Laboratory of Cognitive Neuroscience and Learning Beijing 100875China Beijing Key Laboratory of Brain Imaging and Connectomics Beijing Normal UniversityBeijing 100875China IDG/mcGovern Institute for Brain Research Beijing Normal UniversityBeijing 100875China

Background Disruptive behaviors,including agitation,disinhibition,irritability,and aberrant motor behaviors,are commonly observed in patients with Alzheimer’s disease(AD).However,the neuroanatomical basis of these disruptive behaviors is not fully *** To confirm the differences in cortical thickness and surface area between AD patients and healthy controls and to further investigate the features of cortical thickness and surface area associated with disruptive behaviors in patients with *** One hundred seventy-four participants(125 AD patients and 49 healthy controls)were recruited frommemory clinics at the Peking University Institute of Sixth *** behaviors,including agitation/aggression,disinhibition,irritability/lability,and aberrant motor activity subdomain scores,were evaluated using the Neuropsychiatry *** whole-brain vertex-based and region-of-interest-based cortical thickness and surface area analyses were automatically conducted with the CIVET pipeline based on structural magnetic resonance *** group-based statistical comparisons and brain-behavior association analyses were performed using general linear models,with age,sex,and education level as *** Compared with healthy controls,the AD patients exhibited widespread reduced cortical thickness,with the most significant thinning located in the medial and lateral temporal and parietal cortex,and smaller surface areas in the left fusiform and left inferior temporal *** total scores of disruptive behaviors were significantly associated with cortical thinning in several regions that are involved in sensorimotor processing,language,and expression *** total score of disruptive behaviors did not show significant associations with surface *** highlight that disruptive behaviors in patientswith AD are selectively associated with cortical thickness abnormalities in sensory,motor,and language regions,which provides

关键词： Disruptive behaviors Alzheimer’s disease cortical thickness surface area magnetic resonance imaging(mRI) CIVET algorithm

Genetic regulation of m^(6)A RNA methylation and its contribution in human complex diseases

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Science China(Life Sciences) 2024年第8期67卷 1591-1600页

作者： Kexuan Chen Jiuhong Nan Xushen xiong The Second Affiliated Hospital&Liangzhu Laboratory Zhejiang University School of MedicineHangzhou 311121China State Key Laboratory of Transvascular Implantation Devices The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 311121China

N6-methyladenosine(m^(6)A)has been established as the most prevalent chemical modification in message RNA(mRNA),playing an essential role in determining the fate of RNA *** of m^(6)A has been revealed to lead to abnormal physiological conditions and cause various types of human *** studies have delineated the genetic regulatory maps for m^(6)A methylation by mapping the quantitative trait loci of m^(6)A(m^(6)A-QTLs),thereby building up the regulatory circuits linking genetic variants,m^(6)A,and human complex ***,we review the recent discoveries concerning the genetic regulatory maps of m^(6)A,describing the methodological and technical details of m^(6)A-QTL identification,and introducing the key findings of the cis-and trans-acting drivers of m^(6)*** further delve into the tissue-and ethnicity-specificity of m^(6)A-QTL,the association with other molecular phenotypes in light of genetic regulation,the regulators underlying m^(6)A genetics,and importantly,the functional roles of m^(6)A in mediating human complex ***,we discuss potential research avenues that can accelerate the translation of m^(6)A genetics studies toward the development of therapies for human genetic diseases.

关键词： m^(6)A disease genetics m^(6)A-QTL GWAS

Dynamics of holographic images of scalar-tensor-vector gravity-AdS black holes

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Chinese Physics C 2024年第9期48卷 274-290页

作者： Xin-Yun Hu m.Israr Aslam Rabia Saleem Xiao-xiong Zeng College of Economic and management Chongqing Jiaotong UniversityChongqing 400074China Department of mathematics COMSATS University IslamabadLahore-CampusLahore 54000 Pakistan State Key Laboratory of mountain Bridge and Tunnel Engineering Chongqing Jiaotong UniversityChongqing 400074China Department of mechanics Chongqing Jiaotong UniversityChongqing 400074China

Using AdS/CFT correspondence,we analyze the holographic Einstein images via the response function of the complex scalar field as a probe wave on an AdS Schwarzschild scalar-tensor-vector gravity(STVG)black hole(BH).We find that the amplitude of the response function||decreases with increasing values of coupling parameter a and increases with decreasing temperature *** frequencyωof the wave source also plays a significant role in wave periods;as we increase the values ofω,the periods of waves decrease,indicating that the total response function closely depends on the wave ***,we investigate the optical appearance of the holographic images of the BH in *** found that the holographic ring always appears with surrounding concentric stripes when the observer is located at the north pole,and an extremely bright ring appears when the observer is at the position of the photon sphere of the *** ring changes into a luminosity-deformed ring or a bright light spot as the observational angle *** corresponding brightness profiles show that the luminosity of the ring decreases and the shadow radius increases with increasing values of *** relation between temperature T and the inverse of the horizonh_e is discussed;T is small at the beginning of the horizon he and then increases as the horizon radius *** effect can be used to distinguish the STVG BH solution from other BH ***,these significant features are also reflected in the Einstein ring and corresponding brightness *** addition,we compare the results obtained by wave optics and geometric optics,which align well,implying that the holographic scheme adopted in this study is valid.

关键词： scalar-tensor-vector gravity shadows AdS/CFT correspondence

CFD investigation of structural effects of internal gas intake on powder conveying performance in fuel supply systems for aerospace engines

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Particuology 2024年第9期92卷 140-154页

作者： Guanlong Ren Haijun Sun Fangjun Chen Wen Shen Yunzhen Cai Yihua Xu Henrik Ström Bilainu Oboirien Qingang xiong School of Aircraft Engineering Nanchang Hangkong UniversityNanchang330063China Engineering Research Center of Aero-engine Technology for General Aviation Ministry of EducationNanchang330063China State Key Laboratory of Pulp and Paper Engineering South China University of TechnologyGuangzhou510640China Department of mechanics and maritime Sciences Chalmers University of TechnologyGöteborg41296Sweden Department of Chemical Engineering University of JohannesburgJohannesburg17011South Africa

Optimal design of gas intake in powder fuel supply systems is crucial for performance of aerospace *** is little research on the impact of intake structure on powder conveying *** novel internal intakes were proposed,which are spherical,cube-shaped,and *** validation,CFD simulations demonstrate that fluctuation of mass flow rate of powders in the dome-shaped intake is reduced by about 73.3%compared with the annular external *** trends of phase velocities are similar for the spherical and cube-shaped intakes,while those are similar for the annular external and dome-shaped internal *** of area of gas zone for the annular external and spherical internal intakes is larger than that for the cube-shaped and dome-shaped internal *** and relative pressure drop in the fluidization chamber have a stable stage,and fluctuation of relative pressure drop is small when dome-shaped internal intake is used.

关键词： Powder supply system Intake structure Dense gas-solid flow Two-fluid model Powder fluidization Pressure drop