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Multifunctional indaceno[1,2-b:5,6-b']dithiophene chloride molecule for stable high-efficiency perovskite solar cells

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Science China Chemistry 2023年第1期66卷 185-194页

作者： Yong li Qian Zhang lidan liu Dapeng Wang Zhike liu Ningyi Yuan Jianning Ding Qiang Wang Shengzhong(frank) liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi'an 710119China Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Materials Science and Engineering Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering Jiangsu Province Cultivation Base for State Key Laboratory of Photovoltaic Science and Technology Changzhou UniversityChangzhou 213164China

The additive strategy has emerged as an effective approach to improving the performance of perovskite solar cells(PSCs).Herein,a small acceptor-donor-acceptor type molecule indaceno[1,2-b:5,6-b’]dithiophene chloride(IDT-Cl)is designed and synthesized to advance both the efficiency and stability of FA_(0.85)MA_(0.15)PbI_(3)*** the IDT-Cl molecule,the S-group with high electron density promotes chemical bonding with the lead cations in the perovskite,resulting in enlarged grain size and smoother surface topography of the perovskite *** addition,the undercoordinated lead ions in the perovskite layer may be passivated by the carbonyl group in the 5-chloroindolin-2-one unit,thereby reducing the number of nonradiative recombination ***,the IDT-Cl adjusts the energy level mismatch between the perovskite and two adjacent carrier transport layers,leading to easy charge *** the multifunctional effect of the IDT-Cl molecule,the modified device yields a high power conversion efficiency(PCE)of 24.46%,8.8%higher than that of the control PSC(22.48%).More importantly,the hydrophobic alkyl side-chain of the IDT-Cl molecule further ensures enhanced humidity stability of the perovskite film and environmental,thermal,and light stabilities of the PSC devices.

关键词： non-fullerene multifunctional perovskite solar cell additive defect passivation

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Community phylogenetic structure of grasslands and its relationship with environmental factors on the Mongolian Plateau

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Journal of Arid Land 2019年第4期11卷 595-607页

作者： DONG Lei liANG Cunzhu li frank Yonghong ZHAO liqing MA Wenhong WANG lixin WEN Lu ZHENG Ying li Zijing ZHAO Chenguang Indree TUVSHINTOGTOKH Ministry of Education Key Laboratory of Ecology and Resource Use of the Mongolian Plateau&Inner Mongolia KeyLaboratory of Grassland Ecology School of Ecology and EnvironmentInner Mongolia UniversityHohhot010021China Forestry and Desert Control Research Institute of Alagxa League Bayanhot750306China Institute of General and Experimental Biology Mongolian Academy of SciencesUlaanbaatar-51Mongolia

The community assembly rules and species coexistence have always been interested by ecologists. The community phylogenetic structure is the consequence of the interaction process between the organisms and the abiotic environment and has been used to explain the relative impact of abiotic and biotic factors on species co-existence. In recent years, grassland degradation and biodiversity loss have become increasingly severe on the Mongolian Plateau, while the drivers for these changes are not clearly explored, especially whether climate change is a main factor is debated in academia. In this study, we examined the phylogenetic structure of grassland communities along five transects of climate aridity on the Mongolian Plateau, and analyzed their relations with environmental factors, with the aims to understand the formation mechanism of the grassland communities and the role of climatic factors. We surveyed grassland communities at 81 sites along the five transects, and calculated their net relatedness index(NRI) at two different quadrat scales(small scale of 1 m2 and large scale of 5 m2) to characterize the community phylogenetic structure and analyze its relationship with the key 11 environmental factors. We also calculated the generalized UniFrac distance(GUniFrac) among the grassland communities to quantify the influence of spatial distance and environmental distance on the phylogenetic β diversity. The results indicated that plant community survey using the large scale quadrat contained sufficient species to represent community compositions. The community phylogenetic structure of grasslands was significantly overdispersed at both the small and large scales, and the degree of overdispersion was greater at the large scale than at the small scale, suggesting that competitive exclusion instead of habitat filtering played a major role in determination of community composition. Altitude was the main factor affecting the community phylogenetic structure, whereas climati

关键词： phylogenetic overdispersion environmental factors phylogenetic β diversity spatial scale environmental distance climate change Mongolian Plateau

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On the helium bubble swelling in nano-oxide dispersion-strengthened steels

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Journal of Materials Science & Technology 2022年第10期105卷 172-181页

作者： Vladimir Krsjak Tielong Shen Jarmila Degmova Stanislav Sojak Erik Korpas Pavol Noga Werner Egger Bingsheng li Vladimir Slugen frank A.Garner Slovak University of Technology Faculty of Electrical Engineering and Information TechnologyInstitute of Nuclear and Physical EngineeringIlkovicova 3Bratislava 81219Slovakia Chinese Academy of Sciences Institute of Modern PhysicsLanzhou 730000China Slovak University of Technology Faculty of Materials Science and TechnologyAdvanced Technologies Research InstituteJana Bottu 2781/25Trnava 91724Slovakia Universität der Bundeswehr München Institut für Angewandte Physik und Messtechnik LRT2Werner-Heisenberg-Weg 39Neubiberg85577Germany Southwest University of Science and Technology State Key Laboratory for Environment-friendly Energy MaterialsMianyangSichuan 621010China Texas A&M University Nuclear Engineering DepartmentCollege StationTX 77843USA Radiation Effects Consulting LLC Richland WA 99354USA

The development of structural materials resistant to harsh radiation environments requires an in-depth understanding of the early stage of the aging *** radiation environments with high transmutation helium production rates such as in fusion and spallation applications,even materials with otherwise acceptable radiation stability may suffer from radiation embrittlement related to helium bubble *** theoretical modeling of helium-assisted cavity nucleation in pure metals and simple alloys provides some useful guidelines at the atomic scale level,these,however,do not overlap with the size resolution of available experimental *** this study,we employed slow positron beam spectroscopy to characterize the nucleation and growth of nano-scale helium bubbles in martensitic steels strengthened by thermodynamically stable nano-oxide *** combination with transmission electron microscopy,we experimentally characterized the evolution of helium bubbles from small clusters of radiation-induced vacancies to large cavities well resolvable by *** radiation resistance of oxide-dispersion strengthened steels dominates only in the early stages of bubble evolution,where positron lifetime measurements provide a missing piece of the microstructural puzzle conventionally constructed by TEM.

关键词： Ion irradiation Bubble swelling Helium Positron annihilation spectroscopy Oxide dispersion strengthened steels

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Predicting roof-surface wind pressure induced by conical vortex using a BP neural network combined with POD

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Building Simulation 2022年第8期15卷 1475-1490页

作者： Fubin Chen Wen Kang Zhenru Shu Qiusheng li Yi li Yfrank Chen Kang Zhou School of Civil Engineering Changsha University of Science and TechnologyChangsha410082China School of Civil Engineering Central South UniversityChangsha410083China Department of Architecture and Civil Engineering City University of Hong KongKowloonHong KongChina Hunan Provincial Key Laboratory of Structures for Wind Resistance and Vibration Control&School of Civil Engineering Hunan University of Science and TechnologyXiangtan411201China Department of Civil Engineering The Pennsylvania State UniversityMiddletownPA 17057USA

This study aims to examine the feasibility of predicting surface wind pressure induced by conical vortex using a backpropagation neural network(BPNN)combined with proper orthogonal decomposition(POD),in which a 1:150 scaled model with a large-span retractable roof was tested in wind tunnel under both laminar and turbulent flow *** distributions of mean and fluctuating wind pressure coefficients were first described,and the effects of inflow turbulence,wind direction,roof opening were examined *** the prediction of wind pressure,the POD-BPNN model was trained using measurement data from adjacent *** prediction results are overall *** root-mean-square-error(RMSE)between test and predicted data lies mostly within 10%.In particular,the prediction of mean wind pressure is found to be better than that of fluctuating wind *** outcomes in this study highlight that the proposed POD-BPNN model can be well used as a useful tool to predict surface wind pressure.

关键词： wind tunnel test-roof-surface wind pressure conical vortex proper orthogonal decomposition(POD) backpropagation neural network(BPNN)

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Facile li-Al layered double hydroxide films on Al alloy for enhanced hydrophobicity, anti-biofouling and anti-corrosion performance

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Journal of Materials Science & Technology 2021年第20期79卷 230-242页

作者： Ji li Tianci Yuan Chengliang Zhou Bo Chen Yi Shuai Dawang Wu Dongchu Chen Xiaohu Luo Y.frank Cheng Yali liu State Key Laboratory for Chemo/Biosensing and Chemometrics College of Chemistry and Chemical EngineeringHunan UniversityChangsha410082China Department of Mechanical and Manufacturing Engineering University of CalgaryCalgaryAlbertaT2N 1N4Canada School of Chemistry and Chemical Engineering Qiannan Normal University for NationalitiesDuyun558000China College of Mechanical Engineering and Applied Electronics Technology Beijing University of TechnologyBeijing100124China School of Material Science and Energy Engineering Foshan UniversityFoshan528000China

In this work,lithium(li)-aluminum(Al)layered double hydroxide(LDH)films modified by 4-amino-2-((hydrazine methylene)amino)-4-oxobutanoic acid(denoted as AOA acid)and/or 1H,1H,2H,2H-perfluorooctyltriethoxysilane were prepared on 6N01 Al alloy by a facile,in-situ growth method with enhanced hydrophobicity,anti-biofouling and anti-corrosion *** preparation is low energy consumptive and environment friendly,relying on self-assembly at ambient *** structure,molecular weight and functional groups of the synthesized AOA acid were characterized by NMR spectrometer,ESI-MS spectrometer and Fourier transform infrared(FT-IR)*** the compositions,structure and morphology of the films were characterized by Fourier transform infrared(FT-IR)spectroscopy,glancing-angle X-ray diffraction(GA-XRD),X-ray photoelectron spectroscopy(XPS),field emission scanning electron microscopy(FE-SEM)and energy-dispersive x-ray spectrum(EDS).Water contact angle measurements(CA)and atomic force microscopy(AFM)characterization show that the films possess a micro/nanostructure with an improved *** test,neutral salt tests(NSS)and electrochemical impedance spectroscopy(EIS)conducted in 3.5 wt.%NaCl solutions demonstrate the improved corrosion resistance of the films over bare Al ***,the films also possess an excellent anti-bacterial property toEscherichia coli,Bacillus subtilis and sulfate-reducing bacteria.

关键词： li-Al layered double hydroxides Anti-biofouling Hydrophobicity Anti-bacterial Anti-corrosion

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High-efficiency organic solar cells processed from a halogen-free solvent system

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Science China Chemistry 2023年第8期66卷 2380-2388页

作者： Yueling Su Zicheng Ding Rui Zhang Weibing Tang Wenliang Huang Zhichao Wang Kui Zhao Xiaochen Wang Shengzhong(frank)liu Yongfang li Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationShaanxi Key Laboratory for Advanced Energy DevicesShaanxi Engineering Lab for Advanced Energy TechnologySchool of Materials Science and EngineeringShaanxi Normal UniversityXi’an710119China Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköpingSweden Dalian National Laboratory for Clean Energy iChEMDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing100190China

The use of non-halogenated solvents for the green manufacture of high-efficiency organic solar cells(OSCs)is important for their future ***,the power conversion efficiency(PCE)of the non-halogenated solvent processed OSCs is generally lower than their halogenated counterpart due to the poor film microstructure caused by the solubility ***,we propose a halogen-free solvent system to optimize film microstructure of the photovoltaic blend based on the polymer donor D18and small-molecule acceptor(SMA)L8-BO towards high-efficiency *** solvent system is consisted of a main solvent carbon disulfide and an additive paraxylene,where the former ensures the good solution-processability and promotes the solution aggregation of L8-BO,and the latter can finely control the phase-separation process by selectively dissolving the *** solvent combination robustly produces a high-quality active layer,i.e.,the bicontinuous networks of donor and acceptor with nano-sized phase-separation and strongπ-π*** the effective charge generation,transport and collection,the resulting device from the non-halogenated solvent system shows a high PCE of 17.50%,which is comparable to that of the device prepared from the halogenated solvent chloroform(ca.17.11%).This article proposes a new strategy for the green fabrication of high-efficiency OSCs to accelerate their industrialization.

关键词： organic solar cells small molecule acceptor film microstructure non-halogenated solvent solvent engineering

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Heart rate response and recovery during exercise predict future delirium risk——A prospective cohort study in middle-to older-aged adults

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Journal of Sport and Health Science 2023年第3期12卷 312-323页

作者： Lei Gao Aden Gaba Peng li Richa Saxena frank A.J.LScheer Oluwaseun Akeju Martin K.Rutter Kun Hu Department of Anesthesia Critical Care and Pain MedicineMassachusetts General HospitalHarvard Medical SchoolBostonMA 02114USA Medical Biodynamics Program Brigham and Women's HospitalBostonMA 02115USA Division of Sleep Medicine Harvard Medical SchoolBostonMA 02115USA Broad Institute of Massachusetts Institute of Technology and Harvard CambridgeMA 02142USA Center for Genomic Medicine Massachusetts General HospitalBostonMA 02114USA Division of Diabetes Endocrinology and GastroenterologySchool of Medical SciencesFaculty of BiologyMedicine and HealthManchester Academic Health Science CentreUniversity of ManchesterManchester M139PLUK Diabetes Endocrinology and Metabolism CentreManchester University National Health Service Foundation TrustManchester M139WLUK

Background:Delirium is a neurocognitive disorder characterized by an abrupt decline in attention,awareness,and cognition after surgical/illness-induced stressors on the *** is now an increasing focus on how cardiovascular health interacts with neurocognitive disorders given their overlapping risk factors and links to subsequent dementia and *** common indicator for cardiovascular health is the heart rate response/recovery(HRR)to exercise,but how this relates to future delirium is ***:Electrocardiogram data were examined in 38,740 middle-to older-aged UK Biobank participants(mean age=58.1 years,range:40-72 years;47.3%males)who completed a standardized submaximal exercise stress test(15-s baseline,6-min exercise,and 1-min recovery)and required hospitalization during *** HRR index was derived as the product of the heart rate(HR)responses during exercise(peak/resting HRs)and recovery(peak/recovery HRs)and categorized into low/average/high groups as the bottom quartile/middle 2 quartiles/top quartile,*** between 3 HRR groups and new-onset delirium were investigated using Cox proportional hazards models and a2-year landmark analysis to minimize reverse *** factors,lifestyle factors/physical activity,cardiovascular risk,comorbidities,cognition,and maximal workload achieved were included as ***:During a median follow-up period of 11 years,348 participants(9/1000)newly developed *** with the high HRR group(16/1000),the risk for delirium was almost doubled in those with low HRR(hazard ratio=1.90,95%)confidence interval(95%CI):1.30-2.79,p=0.001)and average HRR(hazard ratio=1.54,95%CI:1.07-2.22,p=0.020)).Low HRR was equivalent to being 6 years older,a current smoker,or>3 additional cardiovascular disease *** were robust in sensitivity analysis,but the risk appeared larger in those with better cognition and when only postoperative delirium was considered(n=1

关键词： Brain health Delirium Exercise stress test UK Biobank

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Mussel-inspired multifunctional coating for bacterial infection prevention and osteogenic induction

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Journal of Materials Science & Technology 2021年第9期68卷 160-171页

作者： Mingjun li Christoph Schlaich Jianguang Zhang Ievgen S.Donskyi Karin Schwibbert frank Schreiber Yi Xi Jorg Radnik Tanja Schwerdtle Rainer Haag Center for Health Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologySchool of Materials Science and EngineeringHebei University of TechnologyTianjin 300130China Institut fur Chemie und Biochemie Freie Universitat BerlinBerlin 14195Germany Division Biodeterioration and Reference Organisms Federal Institute for Materials Research and Testing(BAM)Berlin 12205Germany Division of Surface Analysis and Interfacial Chemistry Federal Institute for Materials Research and Testing(BAM)Berlin 12205Germany Institute of Nutritional Science Department of Food ChemistryUniversity of PotsdamNuthetal D-14558Germany

Bacterial infection and osteogenic integration are the two main problems that cause severe complications after surgeries. In this study, the antibacterial and osteogenic properties were simultaneously introduced in biomaterials, where copper nanoparticles(Cu NPs) were generated by in situ reductions of Cu ions into a mussel-inspired hyperbranched polyglycerol(MI-h PG) coating via a simple dip-coating *** hyperbranched polyglycerol with 10 % catechol groups’ modification presents excellent antifouling property, which could effectively reduce bacteria adhesion on the surface. In this work, polycaprolactone(PCL) electrospun fiber membrane was selected as the substrate, which is commonly used in biomedical implants in bone regeneration and cardiovascular stents because of its good biocompatibility and easy post-modification. The as-fabricated Cu NPs-incorporated PCL membrane [PCL-(MI-h PG)-Cu NPs]was confirmed with effective antibacterial performance via in vitro antibacterial tests against Staphylococcus aureus(S. aureus), Escherichia coli(E. coli), and multi-resistant E. coli. In addition, the in vitro results demonstrated that osteogenic property of PCL-(MI-h PG)-Cu NPs was realized by upregulating the osteoblast-related gene expressions and protein activity. This study shows that antibacterial and osteogenic properties can be balanced in a surface coating by introducing Cu NPs.

关键词： Mussel-inspired coating CuNPs Multi-resistant bacteria Antibacterial Antifouling Osteogenesis

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用不同蛋白质分析方法鉴定玉米分泌蛋白组的比较研究

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光谱学与光谱分析 2010年第10期30卷 2762-2766页

作者：马玮 frank Hochholdinger 李春俭中国农业大学资源与环境学院农业部植物营养学重点开放实验室北京100193 Center for Plant Molecular Biology Depart ment of General GeneticsEberhard Karls University Tuebingen

玉米根系在生长过程中向根际分泌蛋白质类大分子物质。采用双向聚丙烯酰胺凝胶电泳-质谱技术,一维液相色谱-质谱联用(LC/MS)和Shotgun三种不同鉴定方法对无菌条件收集的玉米根系分泌蛋白进行了分离、分析与鉴定,对3种鉴定方法在分泌蛋... 详细信息

玉米根系在生长过程中向根际分泌蛋白质类大分子物质。采用双向聚丙烯酰胺凝胶电泳-质谱技术,一维液相色谱-质谱联用(LC/MS)和Shotgun三种不同鉴定方法对无菌条件收集的玉米根系分泌蛋白进行了分离、分析与鉴定,对3种鉴定方法在分泌蛋白分析中的应用做了详细阐述和比较。结果表明,双向电泳通过银染可以看到200个蛋白质点,但由于蛋白量少,通过质谱无法对玉米根系分泌蛋白进行鉴定;用LC/MS鉴定得到了152个蛋白;用Shotgun技术鉴定得到了2 848个蛋白。LC/MS鉴定得到的蛋白全部出现在用Shotgun技术鉴定得到的2 848个蛋白中,后2种方法的结果可以互相验证。Shotgun技术具有更高的灵敏性,更适合对蛋白质浓度低、干扰物多的植物根分泌蛋白组进行鉴定,能够获得完整可靠的信息。

关键词：玉米根系分泌物分泌蛋白组双向电泳 LC-MS Shotgun MudPIT

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Who may benefit from lower dosages of intravenous tissue plasminogen activator? Results from a cluster data analysis

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Stroke & Vascular Neurology 2020年第4期5卷 348-352页

作者： Yi Dong Ye Han Haipeng Shen Yilong Wang frank Ma Hao li Yongjun Wang Qiang Dong Department of Neurology Huashan Hospital Fudan UniversityShanghaiShanghaiChina Department of Business Administration College of BusinessUniversity of Illinois at Urbana-ChampaignChampaignIllinoisUSA Faculty of Business and Economics University of Hong KongHong KongChina Department of Neurology Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Medical Research Center DotHealthShanghaiChina Big data and AI dempartment China National Clinical Research Center for Neurological DiseasesBeijingChina

background The risk of symptomatic intracranial haemorrhage(sICH)after thrombolysis is low but *** dose of alteplase may reduce the risk of *** aim to identify subsets of patients who could benefit from lower dose of alteplase compared with standard *** Data from two observational registries were pooled together.A total of 3479 patients who had acute ischaemic stroke were entered into the interaction tree *** response variable was the rate of sICH per the definition of the National Institute of Neurological Disorders and Stroke *** improvement was measured by the National Institutes of Health Stroke Scale(NIHSS)and defined as NIHSS 0 or 1 or an improvement of more than 4 points(within 7 days or at discharge).Rare event logistic regression was performed to analyse the OR of safety *** To optimise the interaction effect between tissue plasminogen activator(tPA)dosage(standard/lower)and patient subgroups,three subgroups based on the severity of stroke were identified:(1)NIHSS≤4,(2)NIHSS between 5 and 14,and(3)NIHSS≥*** estimated difference of OR of having sICH was 2.71(95%CI 0.80 to 7.69,p=0.10)for mild,0.13(95%CI 0.02 to 0.68,p=0.01)for moderate,and 0.65(95%CI 0.19 to 2.55,p=0.52)for severe,*** addition,patients who had moderate stroke treated with lower dose had comparable efficacy outcome(OR 1.23,95%CI 0.71 to 2.13,p=0.45).Conclusion Our analysis demonstrated that in patients who had moderate stroke,lower doses of alteplase are associated with significant sICH reduction and non-inferior performance in efficacy,compared with those in the standard dose group.

关键词： dosage doses acute

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