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Leflunomide: A versatile additive for defect reduction, enhanced optoelectronic properties and environmental stability of perovskite films

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Nano Research 2024年第4期17卷 2628-2637页

作者： Dingyue Sun Ming Peng Taijin Wang Longju Yi Shizuo Zhang Feng liu Gary j.Cheng The Institute of Technological Sciences Wuhan UniversityWuhan 430072China School of Power and Mechanical Engineering Wuhan UniversityWuhan 430072China School of Industrial Engineering Purdue UniversityWest LafayetteIN 47906USA

The development of perovskite photoelectric devices with excellent performance is largely dependent on the defects in the perovskite *** address this issue,a specific drug,leflunomide(LF,C_(12)H_(9)F_(3)N_(2)O_(2)),was incorporated into the perovskite to reduce defects and improve its photoelectric *** is believed that the C=O bond on LF molecule can interact with the uncoordinated Pb2+of the perovskite,thereby reducing non-radiative *** novel approach of incorporating LF into perovskite films has the potential to revolutionize the development of high-performance perovskite photoelectric *** trifluoromethyl functional(–CF_(3))group on LF can form a protective layer on the surface of the perovskite film,shielding it from water ***,LF can be utilized to alter the nucleation position of perovskite,thus minimizing the number of defects and optimizing the film ***,the LF-doped perovskite film displays low trap density and high photoelectric *** LF-doped perovskite film showed a trap density of 8.28×10^(11),which is notably lower than the 2.04×10^(12) of the perovskite film without *** responsivity and detectivity of the LF-doped perovskite photodetector were 0.771 A/W and 2.81×10^(11) jones,respectively,which are much higher than the 0.23 A/W and 1.06×10^(10) jones of the LF-undoped perovskite ***,the LF-doped photodetector maintained an initial photocurrent of 86%after 30 days of storage in air,indicating drastically increased environmental *** strongly suggests that LF is an effective additive for perovskites utilized in optoelectronic devices with high performance.

关键词： leflunomide additive engineering defect passivation perovskite

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Revolutionizing plasmonic platform via magnetic field-assisted confined ultrafast laser deposition of high-density,uniform,and ultrafine nanoparticle arrays

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International journal of Extreme Manufacturing 2024年第3期6卷 428-438页

作者： jin Xu Lingfeng Wang Peilin Yang Haoqing jiang Huai Zheng Licong An Xingtao liu Gary j Cheng School of Industrial Engineering Purdue UniversityWest LafayetteIN 47906United States of America Institute of Technological Sciences Wuhan UniversityWuhanHubei 430072People’s Republic of China

The remarkable capabilities of 2D plasmonic surfaces in controlling optical waves havegarnered significant ***,the challenge of large-scale manufacturing of uniform,well-aligned,and tunable plasmonic surfaces has hindered their *** address this,we present a groundbreaking tunable plasmonic platform design achieved throughmagnetic field(MF)assisted ultrafast laser direct deposition in *** precise control of metal nanoparticles(NPs),with cobalt(Co)serving as the model material,employing an MF,and fine-tuning ultrafast laser parameters,we have effectively converted coarse and non-uniform NPs into densely packed,uniform,and ultrafine NPs(~3 nm).This revolutionary advancement results in the creation of customizable plasmonic‘hot spots,’which play a pivotal role insurface-enhanced Raman spectroscopy(SERS)*** profound impact of this designable plasmonic platform lies in its close association with plasmonic resonance and *** the plasmonic nanostructures resonate with incident light,they generate intense local electromagnetic fields,thus vastly increasing the Raman scattering *** enhancement leads to an outstanding 2–18 fold boost in SERS performance and unparalleled sensing sensitivity down to 10^(-10)***,the plasmonic platform also demonstratesrobustness,retaining its sensing capability even after undergoing 50 cycles of rinsing andre-loading of ***,this work adheres to green manufacturing standards,making it an efficient and environmentally friendly method for customizing plasmonic‘hot spots’inSERS *** study not only achieves the formation of high-density,uniform,and ultrafine NP arrays on a tunable plasmonic platform but also showcases the profound relation betweenplasmonic resonance and energy *** outstanding results observed in SERS sensors further emphasize the immense potential of this technology for energy-relatedapplications,including photocatalysis,ph

关键词： magnetic field manipulation laser deposition metasurface SERS

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Biochar-based materials as remediation strategy in petroleum hydrocarbon-contaminated soil and water:Performances,mechanisms,and environmental impact

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journal of Environmental Sciences 2024年第4期138卷 350-372页

作者： Zhuo Wei YiWei Yang liu Shuai Niu Yaxi Xu jong-Hwan Park jim j.Wang Faculty of Environmental Science&Engineering Kunming University of Science&TechnologyKunming 650500China School of Plant Environment&Soil SciencesLouisiana State University AgCenter.Baton RougeLA 70803USA Department of Life Resources Industry Dong-A University37Nakdong-daero 550 beon-gilSaha-guBusan 49315South Korea

Petroleum contamination is considered as a major risk to the health of humans and *** as low-cost and eco-friendly carbon materials,have been widely used for the removal of petroleum hydrocarbon in the *** purpose of this paper is to review the performance,mechanisms,and potential environmental toxicity of biochar,modified biochar and its integration use with other materials in petroleum contaminated soil and ***,the use of biochar in oil-contaminated water and soil as well as the factors that could influence the removal ability of biochar were systematically *** addition,the modification and integrated use of biochar for improving the removal efficiency were summarized from the aspects of sorption,biodegradation,chemical degradation,and ***,the functional impacts and associated ecotoxicity of pristine and modified biochars in various environments were ***,some shortcoming of current approaches,and future research needs were provided for the future direction and challenges of modified biochar ***,this paper gain insight into biochar application in petroleum remediation from the perspectives of performance enhancement and environmental sustainability.

关键词： Petroleum contamination Adsorbent Bioremediation Biochar modification Ecotoxicity

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Computational Models for Three Dimensional Axi-Symmetric Contact Problem of Functionally Graded Material

Computational Models for Three Dimensional Axi-Symmetric Con...

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The 16th Annual Conference of Hong Kong Society of Theoretical and Applied Mechanics 2012、The 1st Mainland-Hong Kong Youth Forum on Mechanics 2012、The 8th Shanghai-Hong Kong Forum on Mechanics and Its Application 2012

作者： T.j.liu Mechanical department College of Sciences of Inner Mongolia University of TechnologyHuhhotInner MongoliaChina

Functionally graded material(FGM)—a new kind of non-homogeneous composite materials has predominant properties and can be used in many fields,so it has been the interest of *** to the gradual variation in material composition and mechanical characteristics,FGM are advantageous over the conventional materials which have sharp interfaces or *** the tractability of the equations governing the related mechanical behaviours of the non-homogeneous materials,it is difficult to build the computational models for FGM which allows arbitrarily variation of the material properties. In this paper we will consider three dimensional axi-symmetric contact problem of FGM *** following models will be constructed to simulate functionally graded material: (1) The exponential *** this model,the shear modulus of the graded coating is assumed to be an exponential function and the Poisson's ratio is constant. (2) The linear multi-layer *** on the fact that an arbitrary curve can be approached by a series of continuous but piecewise linear curves,this model divided the FGM into a series of sublayers with elastic modulus varying linearly in each sub-layers and continuous on the sub-interfaces. The linear multi-layer model is compatible to FGM which allows arbitrarily variation of the material properties,but the Poisson's ratio is limited to 1/3. (3) The exponential multi-layer *** this model,the FGM coating was divided into a series of *** shear modulus in each sub-layer is assumed to take the exponential function *** exponential multi-layer model suits to FGM coating which allows arbitrarily variation of the material properties with no limited to Poisson's ratio. By using the transfer matrix method and Hankel integral transform technique;three dimensional axisymmetric contact problem of FGM is reduced to an integral *** contact tractions are calculated by solving the equations numerically.

关键词： Computational Models for Three Dimensional Axi-Symmetric Contact Problem of Functionally Graded Material

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On Feasibility of Three-Networks Convergence

On Feasibility of Three-Networks Convergence

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2012年控制与信息国际会议

作者： Yajun j.liu School of Automotive and Electronic Engineering Xichang Colloge

Based on the current situation of coexisting three networks, namely,telecommunication network, CATV network and Internet at the present stage, the paper discusses about the technical advantages, favorable factors of t... 详细信息

关键词： Three-network convergence · Telecommunication network · CATV network · Internet

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Specific T-cell immunity to emerging highly-pathogenic viruses in human

Specific T-cell immunity to emerging highly-pathogenic virus...

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第十二届全国免疫学学术大会

作者： liu William j. National Institute for Viral Disease Control and Prevention China CDC

The emerging and re-emerging viruses with high pathogenicity pose a great threaten to public *** host T-cell immunity not only provides a protection role during the virus clearance,but also can lead to an effect of *** established a specific T-cell test and research platform to investigate the mechanism by which the human T-cell immunity reacts to the highly-pathogenic *** the healthy population,we investigated the pre-existing cellular and humoral immune responses against the newly emerging viruses(such as H7 N9 and MERS-CoV) in the healthy population who were recovered from the genetic related virus-infection(such as pH1 N1 and SARS-CoV).By the collaboration with different hospitals,we recruit the patients and investigate their T-cell immune features during the acute infection and the convalescence *** found that the dysfunctional immunity are not only associated with disease progression but also correlated to the human-to-human transmission of the avian influenza *** also utilized the virus-specific T-cell test to evaluate the vaccine *** no CD8

关键词： T-cell immunity highly-pathogenic virus MHC

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STUDY ON DESIGN TECHNIQUES OF A LONG LIFE HOT FORGING DIE WITH MULTI-MATERIALS

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Acta Metallurgica Sinica(English Letters) 2007年第6期20卷 448-456页

作者： X.j. liu H.C. Wang D.W. Li School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070 China

A new design technique for the long life hot forging die has been proposed. By finite element analysis, the reason .for the failure of hot forging die was analyzed and it was concluded that thermal stress is the main reason for the failure of hot forging die. Based on this conclusion, the whole hot forging die was divided into the substrate part and the heat-resistant part according to the thermal stress distribution. Moreover, the heat-resistant part was further subdivided into more zones and the material of each zone was reasonably selected to ensure that the hot forging die can work in an elastic state. When compared with the existing techniques, this design can greatly increase the service life because the use of multi-materials can alleviate the thermal stress in hot forging die.

关键词： hot forging die with multi-material finite element analysis thermal stress

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A Case Study of the Implementation of Activity-Based Costing in China

A Case Study of the Implementation of Activity-Based Costing...

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中国会计学会第六届理事会第二次会议暨2004年学术年会

作者： Lana Y j liu Accounting and Finance Business School University of Newcastle United Kingdom

＜正＞Until now,the research of Activity-Based Costing（ABC） has mainly focused on organisations in the *** has learnt about the applicability of ABC in a Chinese organisational *** study aims to bridge this gap by investigating the implementation of an ABC system at Xu ji Electric Company（Xu ji） in the People’s Republic of *** to fierce external competition on price and internal pressure for appropriate cost drivers for performance measures,Xu ji has piloted an ABC system implementation in one of its production *** management support,which has been identified as one of the main success factors in ABC implementation literature,is evidently the main factor in Xu ji’s ABC *** addition,the findings indicate that Xu ji’s‘top-down’instigation coupled with a high proportion of professionals may contribute to a relatively high level of diffusion of this relatively new accounting *** main obstacles to Xu ji’s ABC implementation may lie in a lack of ’know-how’ in ABC software development and relevance of ABC information to performance measures.

关键词： activity-based costing Chinese management accounting development ABC implementation

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Dual Topological Features of Weyl Semimetallic Phases in Tetradymite BiSbTe_(3)

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Chinese Physics Letters 2021年第7期38卷 69-73页

作者： Z.Z.Zhou H.j.liu G.Y.Wang R.Wang X.Y.Zhou Center for Quantum Materials and Devices College of PhysicsChongqing UniversityChongqing 401331China Key Laboratory of Artificial Micro-and Nano-Structures of Ministry of Education and School of Physics and TechnologyWuhan UniversityWuhan 430072China Chongqing Institute of Green and Intelligent Technology Chinese Academy of ScienceChongqing 400714China

Based on first-principles calculations and symmetry arguments,we reveal that the non-centrosymmetric ternary tetradymite BiSbTe_(3) possesses exotic dual topological features of Weyl semimetallic phases with Z_(2) index(1:000).The results show that the helical Dirac-type surface states protected by the time-reversal symmetry are present in the vicinity of the Brillouin zone center,which is consistent with the experimental ***,we show that four pairs of Weyl points reside exactly at the Fermi level,which are guaranteed to be located on high-symmetry planes due to mirror *** helical surface states and the projected Weyl nodes are well separated in the momentum space,facilitating their observations in *** work not only uncovers a unique quantum phenomenon with dual topological features in the tetradymite family but also paves a fascinating avenue for exploring the coexistence of multi-topological states with wide applications.

关键词： metallic symmetry topological

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Association of N-terminal pro-brain natriuretic peptide with the severity of coronary artery disease in patients with normal left ventricular ejection fraction

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Chinese Medical journal 2014年第4期127卷 627-632页

作者： Wu NQ Guo YL Li XL liu j Qing P Xu RX Zhu CG jia Y j liu G Dong Q jiang LX Li j j Ma FL Division of Dyslipidemia State Key Laboratory of Cardiovascular Disease Fu Wai Hospital National Center for Cardiovascular Disease Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100037 China Department of Cardiology First Hospital of Hohhot Hohhot Inner Mongolia 010030 China

Backround N-terminal pro-brain natriuretic peptide （NT-proBNP） is a reliable predictor in acute coronary artery disease （CAD）. Little is known about patients with stable CAD, especially Chinese patients with CAD. The aim of the present study was to investigate the association of NT-proBNP levels with the severity of CAD in patients with normal left ventricular ejection fraction. Methods A total of 658 consecutive patients were divided into two groups based on angiograms： CAD group （n=484） and angiographic normal control group （n=174）. The severity of CAD was evaluated by modified Gensini score, and its relationship with NT-proBNP was analyzed. Results The prevalence of risk factors such as age, male gender, diabetes mellitus （DM）, dyslipidemia, smoking, and family history of CAD in the CAD group were higher than that in the control group. In multivariate regression model analysis, age, gender, and DM were determinants of the presence of CAD. NT-pro BNP was found to be an independent predictor for CAD （OR：1.66 （95% CI： 1.06-2.61）, P 〈0.05）. In a receiver operating characteristic （ROC）curve analysis, an NT-proBNP value of 641.15 pmol/L was identified as a cut-off value in the diagnosis or exclusion of CAD （area under curve （AUC）=0.56, 95% CI： 0.51-0.61）. Furthermore, NT-proBNP was positively correlated with Gensini score （r=0.14, P 〈0.001） in patients with CAD. Conclusion NT-proBNP was an independent predictor for Chinese patients with CAD, suggesting that the NT-proBNP level might be associated with the presence and the severity of CAD.

关键词： N-terminal pro-brain natriuretic peptide coronary artery disease risk factors modified Gensini score

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