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Integrated hetero-nanoelectrodes for plasmon-enhanced electrocatalysis of hydrogen evolution

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Nano research 2021年第4期14卷 1195-1201页

作者： Wenyu Jiang Xianxin Wu Jinquan Chang Yanhong Ma Luting Song Zhexue Chen Cheng Liang Xinfeng Liu Yong Zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanosciencet National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Standardization and Measurement for Nanotechnobgy CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China

Hetero-nanostructures of plasmonic metals and semiconductors have attracted increasing attention in the field of ***,most of the hetero-nanostructured catalysts are randomly arranged and therefore require comprehensive structural design for optimizing their ***,we report the robust construction of hierarchical hetero-nanostructures where gold(Au)nanorods and molybdenum disulfide(Mo S_(2))quantum sheets(QSs)are integrated in highly ordered *** construction is achieved through porous anodic alumina(PAA)template-assisted *** as-fabricated hetero-nanostructures demonstrate exciting electrocatalysis towards hydrogen evolution reaction(HEr).Both plasmon-induced hot-electron injection and plasmonic scattering/reabsorption mechanisms are determinative to the enhanced electrocatalytic ***,broadband photoresponses of HEr activity in the visible range are observed,indicating their superiority compared with random *** integrated hetero-nanoelectrodes could provide a powerful platform for conversion and utilization of solar energy,meanwhile would greatly prompt the production and exploration of ordered nanoelectrodes.

关键词： nano-integration heterostructure plasmonic metal molybdenum disulfide(MoS_(2)) hydrogen evolution reaction(HEr)

Microstructural features of biomedical cobalt–chromium–molybdenum(CoCrMo) alloy from powder bed fusion to aging heat treatment

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Journal of Materials Science & Technology 2020年第10期42卷 146-156页

作者： Haoqing Li Ming Wang dianjun Lou Weilong Xia Xiaoying Fang Institute for Advanced Manufacturing Shandong University of TechnologyZibo255049China School of Mechanical Engineering Shandong University of TechnologyZibo255049China d Printing Medical Engineering and Technology center Shinva Medical Instrument Co.LTDZibo255086China

The design freedom of powder bed fusion process selective laser melting(SLM)enables flexibility to manufacture customized,geometrically complex medical implants directly from the CAd *** alloys have adequate wear and corrosion resistance,fatigue strength,and biocompatibility,which enables the alloys to be widely used in medical *** work aims to investigate the evolution of microstructures and their influence on tribological property of CoCrMo alloy processed by SLM and aging heat *** results showed that very weaktexture along the building direction and microsegregation along cellular boundaries were *** presence of high residual stress and fine cellular dendrite structure has a pronounced hardening effect on the as-SLM and aging-treated alloys at moderate ***,the hexagonalεphase transformed from theγmatrix during SLM became significant after subsequent aging at moderate temperatures,which further increased the nanohardness and scratch *** temperature(1150℃)heating caused homogenized recrystallization microstructure free of residual stress andεphase,which sharply decreased the hardness and scratch *** material parallel to the building direction exhibited improved tribological property in both SLMed and aging-treated alloy than that of the material perpendicular to the building *** anisotropy in frictional performance may be considered when designing CoCrMo dental implants using laser additive manufacturing.

关键词： Selective laser melting CoCrMo alloy Nanoindentation Nano-scratch test

Seismic performance of an existing bridge with scoured caisson foundation

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Earthquake Engineering and Engineering Vibration 2014年第S1期13卷 151-165页

作者： Kuo-Chun Chang Yu-Chi Sung Kuang-Yen Liu Ping-Hsiung Wang Zheng-Kuan Lee Lu-Sheng Lee Witarto department of Civil Engineering Taiwan University (NTU) Professor department of Civil Engineering Taipei University of Technology (NTUT) center for research on Earthquake Engineering (NCrEE) Associate researcher Associate Technologist Technologist department of Civil Engineering The University of Houston Ph.d Student

This paper presents in-situ seismic performance tests of a bridge before its demolition due to accumulated scouring problem. The tests were conducted on three single columns and one caisson-type foundation. The three single columns were 1.8 m in diameter,reinforced by 30-d32 longitudinal reinforcements and laterally hooped by d16 reinforcements with spacing of 20 cm. The column height is 9.54 m,10.59 m and 10.37 m for Column P2,P3,and P4,respectively. Column P2 had no exposed foundation and was subjected to pseudo-dynamic tests with peak ground acceleration of 0.32 g first,followed by one cyclic loading test. Column P3 was the benchmark specimen with exposed length of 1.2 m on its foundation. The exposed length for Column P4 was excavated to 4 m,approximately 1/3 of the foundation length,to study the effect of the scouring problem to the column performance. Both Column P3 and Column P4 were subjected to cyclic loading tests. Based on the test results,due to the large dimension of the caisson foundation and the well graded gravel soil type that provided large lateral resistance,the seismic performance among the three columns had only minor differences. Lateral push tests were also conducted on the caisson foundation at Column P5. The caisson was 12 m long and had circular cross-sections whose diameters were 5 m in the upper portion and 4 m in the lower portion. An analytical model to simulate the test results was developed in the OpenSees platform. The analytical model comprised nonlinear flexural elements as well as nonlinear soil springs. The analytical results closely followed the experimental test results. A parametric study to predict the behavior of the bridge column with different ground motions and different levels of scouring on the foundation are also discussed.

关键词： Analytical models Cyclic loads Hydraulic structures Piles Pressure vessels reinforcement Seismic waves Seismology Soil structure interactions Soils Textile scouring Underwater foundations

Choroid plexus imaging to track neuroinflammation—a translational model for mouse and human studies

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Neural regeneration research 2023年第3期18卷 521-522页

作者： Muthuraman Muthuraman Mohammadsaleh Oshaghi Vinzenz Fleischer dumitru Ciolac Ahmed Othman Sven G.Meuth Gabriel Gonzalez-Escamilla Sergiu Groppa department of Neurology Focus Program Translational NeuroscienceRhine Main Neuroscience Network(rmn2)University Medical Center of the Johannes Gutenberg University MainzMainzGermany department of Neuroradiology University Medical Center of the Johannes Gutenberg University MainzMainzGermany department of Neurology Medical FacultyHeinrich-Heine-UniversityDüsseldorfGermany

The choroid plexus(ChP)is a highly vascularized and secretory tissue in each of the brain ventricles that represents the key structure between the blood and the cerebrospinal fluid(CSF).Besides its essential role in CSF production and brain waste clearance pathways,the ChP also contributes to the regulation of central nervous system(CNS)immunosurveillance(Ghersi-Egea et al.,2018).Indeed,the ChP forming the blood-CSF barrier(BCSFB)regulates the entry of immune cells and solute molecules into the brain and vice *** antigen-specific,autoreactive immune activation occurs in the periphery,inflammatory cells migrate through the brain barriers towards the CNS(Strominger et al.,2018),initiating neuroinflammatory diseases such as multiple sclerosis(MS).

关键词： al. plexus inflammation

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Acta Metallurgica Sinica(English Letters) 1995年第Z1期8卷 349-358页

作者： CHrISTOPH Ulrich, SPArKA Ulf APPEL Fritz, and WAGNEr richard(Institute for Materials research, GKSS research center, Max-Planck-Str. ,d-21502 Geesthacht, Germany) GKSS research center Geesthacht Germany

deformation micromechanisms of two-phase titanium aluminide alloys have been investigated by deformation tests and electron microscope observations. Interaction mechanisms of perfect and twinning dislocations with the lamellar interfaces were characterized with respect to the factors governing the multiplication and the slip paths of the dislocations. Thermally activated processes controlling the dislocation mobility were described in terms of activation volumes and activation *** analysis is aimed at the identification of the dislocation processes operating under deformation conditions which are relevant for practical applications.

关键词： dEFOrM PHAS

Targeted nanoparticles for the non-invasive detection of traumatic brain injury by optical imaging and fluorine magnetic resonance imaging

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Nano research 2016年第5期9卷 1276-1289页

作者： Luis Javier Cruz Ivo Que Markus Aswendt Alan Chan Mathias Hoehn Clemens Lowik Nanomedicine and Molecular Imaging Department of Radiology Leiden University Medical Center 2333ZA Leiden the Netherlands In-Vivo-NMr Laboratory Max Planck Institute for Neurological Research Cologne D-50931 Cologne Germany Percuros 7522NB Enschede the Netherlands

Necrosis is a form of cell death that occurs only under pathological conditions such as ischemic diseases and traumatic brain injury （TBI）. Non-invasive imaging of the affected tissue is a key component of novel therapeutic interventions and measurement of treatment responses in patients. Here, we report a bimodal approach for the detection and monitoring of TBI. PEGylated poly（lactic-coglycolic acid）（PLGA） nanoparticles （NPs）, encapsulating both near infrared （NIr） fluorophores and perfluorocarbons （PFCs）, were targeted to necrotic ceils. We used cyanine dyes such as Irdye 800CW, for which we have previously demonstrated specific targeting to intracellular proteins of cells that have lost membrane integrity. Here, we show specific in vivo detection of necrosis by optical imaging and fluorine magnetic resonance imaging （^19F MrI） using newly designed PLGA NP（NIr700 ＋ PFC）-PEG-800CW. Quantitative ex vivo optical imaging and ^19F Mr spectroscopy of NIr-PFC content in injured brain regions and in major organs were well correlated. Both modalities allowed the in vivo identification of necrotic brain lesions in a mouse model of TBI, with optical imaging being more sensitive than ^19F MrI. Our results confirm increased blood pool residence time of PLGA NPs coated with a PEG layer and the successful targeting of TBI-damaged tissue. A single PLGA NP containing NIr-PFC enables both rapid qualitative optical monitoring of the TBI state and quantitative 3d information from deeper tissues on the extent of the lesion by MrI. These necrosis-targeting PLGA NPs can potentially be used for clinical diagnosis of brain injuries.

关键词： imaging nanoparticles contrast agents magnetic resonance imaging brain injury stroke

Graphdiyne Hybrid Nanowall Arrays for High-capacity Aqueous rechargeable Zinc Ion Battery

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Chemical research in Chinese Universities 2021年第6期37卷 1301-1308页

作者： LI Jiaofu CHEN Yanhuan WANG Fuhui GUO Jie HE Feng LIU Huibiao CAS Key Laboratory of Organic Solids Beijing National Laboratory for Molecular Sciences(BNLMS)CAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China

development of aqueous rechargeable zinc ion battery is an important direction towards grid energy storage sought in various *** present,the efficient utilization of aqueous rechargeable zinc ion batteries has been seriously affected due to the defects nature of the cathode materials,such as poor capacity,limited rate performance,and limited cycle ***,the search for high-performance cathode materials is a main challenge in this ***,we in-situ prepared graphdiyne-wrapped K_(0.25)·MnO_(2)(K_(0.25)·MnO_(2)@GdY)hybrid nanowall arrays as the cathode of aqueous rechargeable zinc ion *** hybridnanowall arrays have obviously alleviated the pulverization and sluggish kinetic process of MnO_(2) cathode materials and shown high specific capacity(520 mA·h/g at a current density of 55 mA/g),which is near-full two-electron *** high specific capacity was resulted from more than one Zn^(2+)(de)intercalation process occurring per formula unit,in which we observed a structural evolution that partially stemmed from ion exchange between the intercalated K^(+) and Zn^(2+) ions during the discharge *** present investigation not only provides a new material for the aqueous rechargeable Zn ion batteries,also contributes a novel route for the development of next generation aqueous rechargeable Zn ion batteries with high capacity.

关键词： Graphdiyne 2d material Zinc ion battery High-capacity Energy storage

design and Implementation of a 3d Ocean Virtual reality and Visualization Engine

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Journal of Ocean University of China 2012年第4期11卷 481-487页

作者： CHEN Ge LI Bo TIAN Fenglin JI Pengbo LI Wenqing department of Marine Technology Ocean University of ChinaEngineering Research Center of Marine Information TechnologyMinistry of EducationQingdao 266100P.R.China School of resources and Environment South West Petroleum UniversityChengdu 610500P.R.China Institute of Oceanographic Instrumentation Shandong Academy of SciencesQingdao 266001P.R.China

In this study,a 3d virtual reality and visualization engine for rendering the ocean,named VV-Ocean,is designed for marine *** design goals of VV-Ocean aim at high fidelity simulation of ocean environment,visualization of massive and multidimensional marine data,and imitation of marine ***-Ocean is composed of five modules,*** management module,resources management module,scene management module,rendering process management module and interaction management *** are three core functions in VV-Ocean:reconstructing vivid virtual ocean scenes,visualizing real data dynamically in real time,imitating and simulating marine lives *** on VV-Ocean,we establish a sea-land integration platform which can reproduce drifting and diffusion processes of oil spilling from sea bottom to *** factors such as ocean current and wind field have been considered in this *** this platform oil spilling process can be abstracted as movements of abundant oil *** result shows that oil particles blend with water well and the platform meets the requirement for real-time and interactive ***-Ocean can be widely used in ocean applications such as demonstrating marine operations,facilitating maritime communications,developing ocean games,reducing marine hazards,forecasting the weather over oceans,serving marine tourism,and so ***,further technological improvements of VV-Ocean are discussed.

关键词： ocean rendering engine virtual reality visualization imitation of marine lives oil spilling simulation

A novel model for predicting fatty liver disease by means of an artificial neural network

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Gastroenterology report 2021年第1期9卷 31-37,I0001,I0002页

作者： Yi-Shu Chen dan Chen Chao Shen Ming Chen Chao-Hui Jin Cheng-Fu Xu Chao-Hui Yu You-Ming Li department of Gastroenterology The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouZhejiangP.R.China Health Management center The First Affiliated HospitalCollege of MedicineZhejiang UniversityHangzhouZhejiangP.R.China Hithink royal Flush Information Network Co. LtdHangzhouZhejiangP.R.China

Background:The artificial neural network(ANN)emerged recently as a potent diagnostic tool,especially for complicated systemic *** study aimed to establish a diagnostic model for the recognition of fatty liver disease(FLd)by virtue of the ***:A total of 7,396 pairs of gender-and age-matched subjects who underwent health check-ups at the First Affiliated Hospital,College of Medicine,Zhejiang University(Hangzhou,China)were enrolled to establish the ANN *** available in health check-up reports were utilized as potential input *** performance of our model was evaluated through a receiver-operating characteristic(rOC)curve *** outcome measures included diagnostic accuracy,sensitivity,specificity,Cohen’s k coefficient,Brier score,and Hosmer-Lemeshow *** Fatty Liver Index(FLI)and the Hepatic Steatosis Index(HSI),retrained using our training-group data with its original designated input variables,were used as comparisons in the capability of FLd ***:Eight variables(age,gender,body mass index,alanine aminotransferase,aspartate aminotransferase,uric acid,total triglyceride,and fasting plasma glucose)were eventually adopted as input nodes of the ANN *** applying a cut-off point of 0.51,the area under rOC curves of our ANN model in predicting FLd in the testing group was 0.908[95%confidence interval(CI),0.901-0.915]—significantly higher(Pdel(0.881,95%CI,0.872-0.891)and that of the HSI model(0.885;95%CI,0.877-0.893).Our ANN model exhibited higher diagnostic accuracy,better concordance with ultrasonography results,and superior capability of calibration than the FLI model and the HSI ***:Our ANN system showed good capability in the diagnosis of *** is anticipated that our ANN model will be of both clinical and epidemiological use in the future.

关键词： artificial neural network diagnostic model fatty liver disease Fatty Liver Index Hepatic Steatosis Index uric acid