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A new nonfullerene acceptor with an extended π conjugation core enables ternary organic solar cells approaching 19%efficiency

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Nano Research 2024年第5期17卷 4062-4068页

作者： Chunyan Liu Nailiang Qiu Zhengjin Li Yan lu school of Materials science and Engineering Tianjin Key Laboratory for Photoelectric Materials and DevicesKey Laboratory of Display Materials and Photoelectric DevicesMinistry of EducationTianjin University of TechnologyTianjin 300384China school of Chemistry Chemical Engineering and MaterialsJining UniversityQufu 273155China

In organic solar cells(OsCs),it is an effective way to improve the power conversion efficiency(PCE)by adding a guest component with appropriate absorption and energy levels in the host ***,a new nonfullerene acceptor(NFA)named TBF-2Cl was developed by the strategy of expanding theπconjugated core of 2,2’-(((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b’]dithiophene-2,7-diyl)bis(methaneylylidene))bis(5,6-dichloro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(IDT-4Cl)with two benzene *** increase of benzene units,TBF-2Cl exhibits higher lowest unoccupied molecular orbital(luMO)level of-3.75 eV than that of one benzene unit based NFA IDT-4Cl and fluorene core based NFA F-2Cl,which facilitates enhancing the open-circuit voltage(V_(oc))of ternary ***,TBF-2Cl film shows a medium optical bandgap with the absorption range from 500-800 nm,being well complementary with the wide bandgap polymer donor D18 and narrow bandgap NFA ***,a remarkable PCE of 18.92%with a high short-circuit current density(J_(sc))of 27.40 mA·cm^(-2),a fill factor(FF)of 0.749,especially an outstanding V_(oc) of 0.922 V was achieved for the optimal ternary device based on D18:TBF-2Cl:CH-6F,surpassing the binary counterpart(17.08%).The findings provide insight into the development of new guest acceptors for obtaining more efficient OsCs.

关键词： medium optical bandgap high lowest unoccupied molecular orbital(luMO)level the third component ternary organic solar cell high open-circuit voltage

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Empirical Analysis of Catering service satisfaction in scenic spots and the Construction of 4Ps Improving Paths

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Journal of systems science and Information 2024年第4期12卷 554-574页

作者： Jinrong lu Yiling WANG school of Business Minnan Normal UniversityZhangzhou 363000China

Tourism has become the primary leisure activity for modern people,and a scenic spot’s appeal to tourists is closely linked to the quality of supporting catering services within the *** satisfaction with catering services in these scenic spots has become a key factor in promoting the development of urban tourist *** Zhangzhou,a tourist city,as an example,this paper conducts an empirical study on the satisfaction of catering services in Zhangzhou’s scenic spots through IPA ***,based on the scale of relevant influencing factors affecting catering service satisfaction in Zhangzhou’s scenic spots,a field questionnaire survey has been *** main levels,five core elements,and 31 sub-indicators have been summarized to construct the evaluation system for catering service satisfaction in scenic *** the analysis of IPA data and the examination of various indicators related to catering services in Zhangzhou’s scenic spots,we analyze the influencing factors affecting tourists’satisfaction with catering ***,we also introduce the 4Ps demand theory of catering ***,based on the analysis and evaluation of IPA quadrant and the 4Ps demand theory,we initially construct the 4Ps improvement *** will provide theoretical and practical references for enhancing the catering service satisfaction of tourists in scenic spots.

关键词： scenic spots catering service satisfaction 4Ps demand theory

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Molecular Evolution of Protein sequences and Codon Usage in Monkeypox Viruses

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Genomics, Proteomics & Bioinformatics 2024年第1期22卷 89-97页

作者： Ke-Jia shan Changcheng Wu Xiaolu Tang Roujian lu Yaling Hu Wenjie Tan Jian lu state Key Laboratory of Protein and Plant Gene Research Center for BioinformaticsSchool of Life SciencesPeking UniversityBeijing 100871China sinovac Biotech Ltd. Beijing 100085China NHC Key Laboratory of Biosafety National Institute for Viral Disease Control and PreventionChinese Center for Disease Control and PreventionBeijing 100052China

The monkeypox virus(mpox virus,MPXV)epidemic in 2022 has posed a significant public health ***,the evolutionary principles of MPXV remain largely ***,we examined the evolutionary patterns of protein sequences and codon usage in *** first demonstrated the signal of positive selection in OPG027,specifically in the CladeⅠlineage of ***,we discovered accelerated protein sequence evolution over time in the variants responsible for the 2022 ***,we showed strong epistasis between amino acid substitutions located in different *** codon adaptation index(CAI)analysis revealed that MPXV genes tended to use more non-preferred codons compared to human genes,and the CAI decreased over time and diverged between clades,with CladeⅠ>Ⅱa andⅡb-A>Ⅱ*** the decrease in fatality rate among the three groups aligned with the CAI pattern,it remains unclear whether this correlation was coincidental or if the deoptimization of codon usage in MPXV led to a reduction in fatality *** study sheds new light on the mechanisms that govern the evolution of MPXV in human populations.

关键词： Mpox virus Positive selection OPG027 Accelerated evolution Codon usage bias

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study of the pressure transient behavior of directional wells considering the effect of non-uniform flux distribution

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Petroleum science 2024年第3期21卷 1765-1779页

作者： Yan-Zhong Liang Bai-lu Teng Wan-Jing luo school of Energy Resources China University of Geosciences(Beijing)Beijing100083China

During the production,the fluid in the vicinity of the directional well enters the wellbore with different rates,leading to non-uniform flux distribution along the directional ***,in all existing studies,it is oversimplified to a uniform flux distribution,which can result in inaccurate results for field ***,this paper proposes a semi-analytical model of a directional well based on the assumption of non-uniform flux ***,the direction well is discretized into a carefully chosen series of linear sources,such that the complex well trajectory can be captured and the nonuniform flux distribution along the wellbore can be considered to model the three-dimensional flow *** using the finite difference method,we can obtain the numerical solutions of the transient flow within the *** the aid of Green's function method,we can obtain the analytical solutions of the transient flow from the matrix to the *** complete flow behavior of a directional well is perfectly represented by coupling the above two types of transient ***,on the basis of the proposed model,we conduct a comprehensive analysis of the pressure transient behavior of a directional *** computation results show that the flux variation along the direction well has a significant effect on pressure *** addition,the directional well in an infinite reservoir may exhibit the following flow regimes:wellbore afterflow,transition flow,inclined radial flow,elliptical flow,horizontal linear flow,and horizontal radial *** horizontal linear flow can be observed only if the formation thickness is much smaller than the well ***,a dip region that appears on the pressure derivative curve indicates the three-dimensional flow behavior near the wellbore.

关键词： Directional well Pressure transient behavior semi-analytical model Non-uniform flux

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Progress in the Management of Patients with Cholestatic Liver Disease:Where Are We and Where Are We Going?

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Journal of Clinical and Translational Hepatology 2024年第6期12卷 581-588页

作者： Xin luo lun-Gen lu Department of Gastroenterology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghaiChina

Cholestatic liver disease is a group of diseases in which bile acid accumulates in the liver for various reasons,resulting in abnormal liver biochemical indicators and histological *** can be divided into intrahepatic cholestasis and extrahepatic cholestasis,which will contribute to liver damage and progress to liver fibrosis and *** biliary cholangitis(PBC)and primary sclerosing cholangitis are the two most typical cholestatic liver *** acid is currently the first-line treatment for PBC,while obeticholic acid,budesonide and fibrates have also shown good potential in the treatment of *** are currently no official drugs approved to treat primary sclerosing cholangitis,and the use of ursodeoxycholic acid may have certain clinical *** present,progress has been made in new treatment directions for cholestatic liver disease,including fibroblast growth factor 19,cholestyramine,s-adenosyl-L-methionine,steroid drugs,farnesoid X receptor agonists,and *** progress has been made in the management of cholestatic liver disease but there are still many opportunities and *** this review,we summarized the recommended guidelines for the management of cholestatic disease and the progress of new drug research and development,in order to provide an important reference for the clinical practice of cholestatic liver disease.

关键词： Cholestatic liver disease Management Ursodeoxycholic acid Primary biliary Cholangitis Primary sclerosing cholangitis Ursodeoxycholic acid Obeticholic acid

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Energy beam-based direct and assisted polishing techniques for diamond:A review

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International Journal of Extreme Manufacturing 2024年第1期6卷 93-124页

作者： Zhuo Li Feng Jiang Zhengyi Jiang Zige Tian Tian Qiu Tao Zhang Qiuling Wen Xizhao lu Jing lu Hui Huang Institute of Manufacturing Engineering Huaqiao UniversityXiamen 361021People’s Republic of China school of Mechanical MaterialsMechatronic and Biomedical EngineeringUniversity of WollongongWollongongNSW 2522Australia College of Mechanical Engineering and Automation Huaqiao UniversityXiamen 361021People’s Republic of China state Key Laboratory of High Performance Tools Huaqiao UniversityXiamen 361021People’s Republic of China

Diamond is a highly valuable material with diverse industrial applications,particularly in the fields of semiconductor,optics,and high-power ***,its high hardness and chemical stability make it difficult to realize high-efficiency and ultra-low damage machining of *** address these challenges,several polishing methods have been developed for both single crystal diamond(sCD)and polycrystalline diamond(PCD),including mechanical,chemical,laser,and ion beam processing *** this review,the characteristics and application scope of various polishing technologies for sCD and PCD are ***,various energy beam-based direct and assisted polishing technologies,such as laser polishing,ion beam polishing,plasma-assisted polishing,and laser-assisted polishing,are *** current research progress,material removal mechanism,and infuencing factors of each polishing technology are *** some of these methods can achieve high material removal rates or reduce surface roughness,no single method can meet all the ***,the future development prospects and application directions of different polishing technologies are presented.

关键词： single crystal diamond polycrystalline diamond energy beam polishing technology material removal mechanism influencing factors

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stretchable on-skin touchless screen sensor enabled by ionic hydrogel

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Nano Research 2024年第5期17卷 4462-4470页

作者： Tianxing Feng Dan Ling Chaoyue Li Wentao Zheng shichuan Zhang Chang Li Artem Emel’yanov Alexander s.Pozdnyakov Lijun lu Yanchao Mao Key Laboratory of Materials Physics of Ministry of Education School of Physics and MicroelectronicsZhengzhou UniversityZhengzhou 450001China A.E.Favorsky Irkutsk Institute of Chemistry Siberian Branch of the Russian Academy of SciencesIrkutsk 664033Russian Federation

screen sensors are the most commonly used human-machine interfaces in our everyday life,which have been extensively applied in personal electronics like *** screen sensors are attracting growing interest due to their distinct advantages of high interaction freedom,comfortability,and hand ***,the material compositions of current touchless screen sensors are rigid and fragile,hardly meeting the needs of wearable and stretchable on-skin electronics ***,these touchless screen sensors are also restricted by high power consumption,limited gesture types of recognition,and the requirement of light ***,we report a stretchable on-skin touchless screen sensor(OTss)enabled by an ionic hydrogel-based triboelectric nanogenerator(TENG).Compared with current touchless screen sensors,the OTss is stretchable,self-powered,and competent to recognize diverse gestures by making use of charges naturally carried on fingers without the need of sufficient light *** on-skin noncontact screen operating system is further demonstrated on the basis of the OTss,which could unlock a cellphone interface in touchless operation mode on the human *** work for the first time introduces the on-skin touchless concept to screen sensors and offers a direction to develop new-generation screen sensors for future cellphones and personal electronics.

关键词： human-machine interface stretchable ionic hydrogel triboelectric nanogenerator self-powered sensor

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Rational Design of Plasmonic Nanoparticle-Molecule Complexes for Chirality sensing

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Chinese Journal of Chemistry 2024年第8期42卷 903-919页

作者： Chen Wang Dandan lu Lichao sun Qingfeng Zhang College of Chemistry and Molecular sciences Wuhan UniversityWuhanHubei430072 China

Comprehensive summary,sensing the chirality of molecules is of great importance to fields such as enantioselective synthesis,pharmaceutical industry,and *** nanoparticles are ideal candidates for molecular sensing due to their inherent plasmonic properties that significantly enhance their sensitivity to surrounding *** plasmonic nanoparticle-molecule complexes for chirality sensing has drawn enormous attention in recent years due to their intriguing properties and potential ***,in this review,we believe it is timely to circumnavigate the rational design of plasmonic nanoparticle-molecule complexes and widen the scope of their emerging applications in chirality ***,we present different fundamental mechanisms for plasmon-based chirality that are built on the system of plasmonic nanoparticle-molecule ***,we review the typical applications of plasmonic nanoparticle-molecule complexes in chirality ***,we discuss the emerging biomedical applications that the plasmon-based chirality has attracted enormous ***,we provide an outlook on the challenges and opportunities in the field of plasmonic approaches for chirality sensing.

关键词： Chirality surface plasmon resonance Nanoparticles Chiral molecules Chirality sensing

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Effect of(Cr,V)_(2)(C,N)on the Microstructure and Mechanical Properties of WC-10Co Cemented Carbides

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Journal of Wuhan University of Technology(Materials science) 2024年第5期39卷 1138-1148页

作者： LI Xiangkun WANG lu YE Jinwen school of Materials science and Engineering Sichuan UniversityChengdu 610065China

WC-10Co cemented carbides with finer WC and narrower grain size distributions are produced by using(Cr,V)_(2)(C,N)as grain growth *** a result,with the increase of(Cr_(0.9),V_(0.1))_(2)(C,N)and(V_(0.9),Cr_(0.1))_(2)(C,N),the grains size of WC and mean free path of Co phase decrease,and adjacency of WC *** and homogenization of grains enhance the transverse rupture strength(TRs)and the ***,the deflection and bridging of cracks keep the fracture toughness at a respectable *** WC-10Co-0.6(Cr_(0.9),V_(0.1))_(2)(C,N)-0.025(V_(0.9),Cr_(0.1))_(2)(C,N)cemented carbides exhibit excellent comprehensive mechanical properties with the TRs of 4602.6 MPa,hardness of 1835 kg/mm^(2),and fracture toughness of 10.39 MPa·m^(1/2),***,the large pores are caused by excess N larger than 0.03 wt%and deteriorates the mechanical *** provide a new approach to WC-Co cemented carbides preparation with a narrow grain size distribution by adding novel grain growth inhibitors.

关键词： (Cr,V)_(2)(C,N) nutrient content WC grains size microstructure mechanical properties

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Nitrogen isotope stratigraphy of the Early Cambrian successions in the Tarim Basin:spatial variability of nitrogen cycling and its implication for paleo-oceanic redox conditions

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Acta Geochimica 2024年第4期43卷 785-801页

作者： Bi Zhu Xuefeng Li lu Ge Yongquan Chen Institute of Earth’s Critical Zone School of Earth Sciences and EngineeringHohai UniversityNanjing 210098China Research Institute of Exploration and Development Tarim Oil Field CompanyPetroChinaKorlaChina

The Early Cambrian represents a critical time period characterized by extraordinary biological innovations and dynamic redox conditions in *** isotopic signatures of ancient sediments have the potential to elucidate the evolutionary path of marine redox states and the biogeochemical nitrogen cycle within the water column of the Early Cambrian *** existing research on this topic has predominantly focused on south China,the exploration of other continental margins has been limited,leaving contradictory hypotheses *** this study,pairedδ^(15)N andδ^(13)C org analyses were performed on the Lower Cambrian successions from the shiairike section(inner ramp)and Well Tadong 2(deep shelf/basin)in the northwestern and eastern Tarim Basin,*** data from the shiairike section reveal a discernible shift in the operation of different nitrogen cycles for the black chert-shale unit,also referred to as the black rock series in Chinese literature,of the Yurtus Formation(Fortunian stage to lower stage 3).Oscillatingδ^(15)N values for its lower part are suggestive of alternating anaerobic assimilation of NH 4+and denitrification/*** is likely attributed to a shallow,unstable chemocline consistent with the upwelling and incursion of deep,anoxic waters during a major *** contrast,aerobic nitrogen cycling,indicated by positiveδ^(15)N values of>2‰,dominated the upper part alongside a reduction in upwelling *** the other hand,theδ^(15)N signatures of Xishanbulake and Xidashan Formations of Well Tadong 2,which encompass a time interval from the Cambrian Fortunian Age to Age 4,are indicative of N_(2)fixation by diazotrophs as the major nitrogen *** two studied intervals,although not time-equivalent,exhibit separated states of nitrogen cycling at least during the deposition of the Yurtus black rock *** spatially different nitrogen cycling of the studied sections is compatible with a redox-stratified ocean dur

关键词： Nitrogen isotopes Early Cambrian Tarim Black rock series

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