检索结果-南通市图书馆

Acta Pharmaceutica Sinica B 2018年第3期8卷 360-370页

作者： Li Tian Linfeng Lu James Feng Marites P.Melancon Department of Interventional Radiology The University of Texas MD Anderson Cancer Center Duke University Graduate School of Biomedical Sciences University of Texas Health Science Center at Houston

A review of radiopaque nano and polymeric materials for atherosclerosis imaging and catheterization procedures is presented in this paper. Cardiovascular diseases(CVDs) are the leading cause of death in the US with atherosclerosis as a significant contributor for mortality and morbidity. In this review paper, we discussed the physics of radiopacity and X-ray/CT, clinically used contrast agents,and the recent progress in the development of radiopaque imaging agents and devices for the diagnosis and treatment of CVDs. We focused on radiopaque imaging agents for atherosclerosis, radiopaque embolic agents and drug eluting beads, and other radiopaque medical devices related to catheterization procedures to treat CVDs. Common strategies of introducing radiopacity in the polymers, together with examples of their applications in imaging and medical devices, are also presented.

关键词： Radiopaque contrast nanoparticles and materials X-ray CT Vascular diseases Atherosclerosis Plaque Stenosis Embolization Inferior vena cava filters

Two-in-one tecton strategy to construct single crystalline hydrogen-bonded organic framework with high proton conductivity above 100℃

在线全文

学校读者我要写书评

暂无评论

中国科学:化学英文版 2023年第9期66卷 2563-2568页

作者： Xiao-lu Wang linfeng Liang Shuai Dou Xian-Ming Zhang Institute of Crystalline Materials Shanxi UniversityTaiyuan 030006China Institute of Urban Environment Chinese Academy of SciencesXiamen 361021China College of Chemistry Taiyuan University of TechnologyTaiyuan 030024China

By tactically integrating two different kinds of proton donors and acceptors into one supramolecular tecton, a new crystalline hydrogen-bonded organic framework(HOF-SXU-1) has been developed. HOF-SXU-1 features a remarkable proton conductivity as high as 6.32 mS cm^(-1) and an extremely low activation energy of 0.16 eV at 160℃ under anhydrous N_(2) conditions.By contrast, under identical conditions, the organic precursors of HOF-SXU-1 only exhibit negligible proton conduction performance, demonstrating that the formation of HOF is crucial for excellent proton conduction performance.

关键词： two-in-one strategy hydrogen-bonded organic framework proton conduction solid state electrolyte

π-Extended End Groups Enable High-Performance All-Polymer Solar Cells with Near-Infrared Absorption

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第23期41卷 3261-3267页

作者： linfeng Yu Haiqin Xiao Yu Shi Xia Guo Xinxin Xia Xinhui lu Maojie Zhang Laboratory of Advanced Optoelectronic Materials Suzhou Key Laboratory of Novel Semiconductor-optoelectronics Materials and Devices College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu215123 China National Engineering Research Center for Colloidal Materials School of Chemistry & Chemical EngineeringShandong UniversityJinanShandong250100 China Department of Physics Chinese University of Hong KongNew TerritoriesHong Kong999077 China

Narrow-bandgap n-type polymers are essential for advancing the development of all-polymer solar cells(all-PSCs).Herein,we developed a novel polymer acceptor PNT withπ-extended 2-(3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1-ylidene)malononitrile(CPNM)end groups.Compared to commonly used 2-(3-oxo-2,3-dihydro-1H-cyclopenta[b]naphthalen-1ylidene)malononitrile(IC)units,CPNM units have a further extended fused ring,providing the PNT polymer with extended absorption into the near-IR region(903 nm)and exhibiting a narrow optical bandgap(1.37 eV).Furthermore,PNT exhibits a high electron mobility(6.79×10^(−4) cm^(2)·V^(−1)·S^(−1))and a relatively high-lying lowest unoccupied molecular orbital(luMO)energy level of−3.80 eV.When blended with PBDB-T,all-PSC achieves a power conversion efficiency(PCE)of 13.7%and a high short-circuit current density(JSC)of 24.4 mA·cm^(−2),mainly attributed to broad absorption(600—900 nm)and efficient charge separation and collection.Our study provides a promising polymer acceptor for all-PSCs and demonstrates thatπ-extended CPNM units are important to achieve high-performance for all-PSCs.

关键词： Polymer acceptors π-Extended end groups High short-circuit current density Narrow-bandgap All-polymer solar cells

Rapid subsurface damage detection of SiC using inductivity coupled plasma

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Extreme Manufacturing 2021年第3期3卷 104-114页

作者： Yi Zhang linfeng Zhang Keyu Chen Dianzi Liu Dong lu Hui Deng Department of Mechanical and Energy Engineering Southern University of Science and TechnologyNo.1088Xueyuan RoadShenzhenGuangdong 518055People’s Republic of China School of Engineering Faculty of ScienceUniversity of East AngliaNorwich Research ParkNorwich NR47TJUnited Kingdom

This paper proposes a method for the rapid detection of subsurface damage(SSD)of Si C using atmospheric inductivity coupled plasma.As a plasma etching method operated at ambient pressure with no bias voltage,this method does not introduce any new SSD to the substrate.Plasma diagnosis and simulation are used to optimize the detection operation.Assisted by an Si C cover,a taper can be etched on the substrate with a high material removal rate.Confocal laser scanning microscopy and scanning electron microscope are used to analyze the etching results,and scanning transmission electron microscope(STEM)is adopted to confirm the accuracy of this method.The STEM result also indicates that etching does not introduce any SSD,and the thoroughly etched surface is a perfectly single crystal.A rapid SSD screening ability is also demonstrated,showing that this method is a promising approach for the rapid detection of SSD.

关键词： silicon carbide subsurface damage SSD detection ICP etching

Microcellular foamed polyamide 6/carbon nanotube composites withsuperior electromagnetic wave absorption

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第22期117卷 215-224页

作者： Menglong Xu linfeng Wei Li Ma Jiawei lu Tao Liu Ling Zhang Ling Zhao Chul B.Park State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Mechanical and Industrial Engineering University of Toronto5 King’s College RoadTorontoOntario M5S 3G8Canada Shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Electromagnetic (EM) wave pollution causing damage to precision equipment and threatening thehealth of living organisms has attracted considerable attention. Herein, promising microcellular foamedpolyamide 6 (PA6)/carbon nanotube (CNT) composites for highly efficient EM wave absorption were successfully fabricated using supercritical CO_(2) foaming. Nanocomposites foams with a void fraction rangingfrom 38.7% to 85.1% were achieved, providing a platform to assess the correlation of the electrical conductivity, the dielectric permittivity and the EM wave absorption properties with porosity. Notably, theFoam-257.5C sample with a void fraction of 38.7% exhibited outstanding EM wave absorption characteristics at a thickness of only 1.59 mm and an ultra-low reflection loss value of -55.3 dB (99.9997% wave absorption). Most importantly, the effective absorption bandwidth (EAB) of the Foam-257.5C sample couldcover the entire Ku band (12.4–18 GHz) by slightly adjusting the thickness from 1.20 to 1.60 mm. Thesuperior EM wave absorption performance of the Foam-257.5C sample was attributed to multiple reflections and scattering at the solid-gas interfaces, favorable impedance matching due to the existence ofa large polymer-air interface area, conductive loss near the interfaces and interfacial polarization. Thus,this study offers an eco-friendly, simple and versatile methodology to develop high-efficiency, flexiblepolymer-based EM wave absorbents.

关键词： Polymer nanocomposites Supercritical CO_(2)foaming Void fraction Dielectric properties Electromagnetic wave absorption

Identifying the geographical origin and processing technology of Moyao(Myrrh) on the basis of near-infrared spectroscopy combined with chemometrics

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medicine 2024年第3期44卷 505-514页

作者： XU Ningning YAN Ganming XU Fengjie DENG linfeng QIAO Xinjiang lu Changzheng CHENG Shaomin TCM Diagnosis Institute College of Traditional Chinese MedicineJiangxi University of Chinese Medicine TCM Processing Institute Pharmaceutical CollegeJiangxi University of Chinese medicine School of Electronic Information and Artificial Intelligence Shaanxi University of Science and Technology Jiangzhong Pharmaceutical Co. Ltd. Jiangxi Guhan Refined Chinese Herbal Pieces Co. Ltd.

OBJECTIVE: To evaluate the quality of Moyao(Myrrh) in the identification of the geographical origin and processing of the products. METHODS: Raw Moyao(Myrrh) and two kinds of Moyao(Myrrh) processed with vinegar from three countries were identified using near-infrared(NIR) spectroscopy combined with chemometric techniques. Principal component analysis(PCA) was used to reduce the dimensionality of the data and visualize the clustering of samples from different categories. A classical chemometric algorithm(PLS-DA) and two machine learning algorithms [K-nearest neighbor(KNN) and support vector machine] were used to conduct a classification analysis of the near-infrared spectra of the Moyao(Myrrh) samples, and their discriminative performance was evaluated. RESULTS: Based on the accuracy, precision, recall rate, and F1 value in each model, the results showed that the classical chemometric algorithm and the machine learning algorithm obtained positive results. In all of the chemometric analyses, the NIR spectrum of Moyao(Myrrh) preprocessed by standard normal variation or Multivariate scattering correction combined with KNN achieved the highest accuracy in identifying the geographical origins, and the accuracy of identifying the processing technology established by the KNN method after first-order derivative pretreatment was the best. The best accuracy of geographical origin discrimination and processing technology discrimination were 0.9853 and 0.9706 respectively. CONCluSIONS: NIR spectroscopy combined with chemometric technology can be an important tool for tracking the origin and processing technology of Moyao(Myrrh) and can also provide a reference for evaluations of its quality and the clinical use.

关键词： Moyao () geographical origin near-infrared spectroscopy processing technology

Properties of Boron-doped μc-Ge:H Films Deposited by Hot-wire CVD

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2015年第3期30卷 516-519页

作者：黄海宾沈鸿烈 WU Tianru lu linfeng TANG Zhengxia SHEN Jiancang Institute of Photovoltaics Nanchang University College of Materials Science & Technology Nanjing University of Aeronautics & Astronautics National Laboratory of Solid State Microstructure and Department of Physics Nanjing University

Boron-doped hydrogenated microcrystalline Germanium （lac-Ge：H） films were deposited by hot-wire CVD. H2 diluted G-ell4 and B2H6 were used as precursors and the substrate temperature was kept at 300 ℃. The properties of the samples were analyzed by XRD, Raman spectroscopy, Fourier transform infrared spectrometer and Hall Effect measurement with Van der Pauw method. It is found that the films are partially crystallized, with crystalline fractions larger than 45% and grain sizes smaller than 50 nm. The B-doping can enhance the crystallization but reduce the grain sizes, and also enhance the preferential growth of Ge （220）. The conductivity of the films increases and tends to be saturated with increasing diborane-to-germane ratio RB2H6. All the Hall mobilities of the samples are larger than 3.8 cmZV-1·s-1. A high conductivity of

关键词： Boron pc-Ge：H film HWCVD crystalline fraction conductivity Hall mobility

BIM在成都东部新区规划展示中心幕墙工程中的应用

在线全文

学校读者我要写书评

暂无评论

土木建筑工程信息技术 2022年第4期14卷 23-28页

作者：陆林枫孙志刚中建深圳装饰有限公司深圳518035

本文主要介绍了成都东部新区规划展示中心幕墙工程项目在深化设计优化、加工制造、施工安装各阶段的BIM参数化应用。项目以成都市花--芙蓉花为设计理念,花瓣位置采用了双曲幻彩蜂窝铝板的双层幕墙系统和外倾双曲玻璃幕墙系统,整体造型... 详细信息

本文主要介绍了成都东部新区规划展示中心幕墙工程项目在深化设计优化、加工制造、施工安装各阶段的BIM参数化应用。项目以成都市花--芙蓉花为设计理念,花瓣位置采用了双曲幻彩蜂窝铝板的双层幕墙系统和外倾双曲玻璃幕墙系统,整体造型无明显规律,系统交接面异常之多。因此,项目完全采用Rhino+Grasshopper的BIM参数化方式进行建模、分析、优化和下料,为项目的圆满实施提供了可靠保证。

关键词： BIM 参数化幕墙 Rhino Grasshopper

Designing heterostructured FeP–CoP for oxygen evolution reaction:Interface engineering to enhance electrocatalytic performance

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第5期16卷 6601-6607页

作者： Shuang Hou Ansai Zhang Qi Zhou Yingjie Wen Sixie Zhang linfeng Su Xinjie Huang Tian Wang Kun Rui Cheng Wang Huiling Liu Zhiyi lu Peilei He Institute for New Energy Materials and Low-Carbon Technologies School of Materials Science and EngineeringTianjin Key Laboratory of Advanced Functional Porous MaterialsTianjin University of TechnologyTianjin 300384China Institute of New Energy Technology Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Flexible Electronics(KLOFE) Institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)Nanjing 211816China

It is significant to develop highly efficient electrocatalysts for energy conversion systems.Interface engineering is one of the most feasible approaches to effectively enhance the electrocatalytic activity.Herein,the density functional theory(DFT)calculations predict that the potential barriers of Fe sites at the interface of FeP–CoP heterostructures are lower than that of Fe sites in FeP nanoparticles(NPs),Co sites in CoP NPs,or Co sites in heterostructures.Motivated by the DFT calculation results,FeP–CoP heterostructures have been designed and synthesized by a metal–organic frameworks(MOFs)confined-phosphorization method.The FeP–CoP exhibits the lowest overpotential of 230 mV at the current density of 10 mA·cm^(−2)for oxygen evolution reaction(OER),compared with FeP(470 mV)and CoP(340 mV),which outperforms most of transition metal-based catalysts.The Tafel analysis of FeP–CoP heterostructures shows an improved reaction kinetic pathway with the smallest slope of 90.3 mV·dec^(−1),as compared to the Tafel slopes of FeP NPs(137 mV·dec^(−1))and CoP NPs(114 mV·dec^(−1)).And the FeP–CoP shows extraordinary long-term stability over 24 h.The excellent activity and long-term stability of FeP–CoP derive from the synergistic effect between FeP and CoP.

关键词： electrocatalysts interface engineering FeP–CoP heterostructures oxygen evolution reaction synergistic effect

Numerical study of mono-crystalline silicon solar cells with passivated emitter and rear contact configuration for the efficiency beyond 24% based on mass production technology

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Semiconductors 2020年第6期41卷 78-84页

作者： Peng Wang Gaofei Li Miao Wang Hong Li Jing Zheng Liyou Yang Yigang Chen Dongdong Li Linfeng Lu School of Materials Science and Engineering Shanghai UniversityShanghai 200444China CAS Key Lab of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China Jinneng Clean Energy Limited Company Lvliang 032100China

Mono-crystalline silicon solar cells with a passivated emitter rear contact(PERC)configuration have attracted extensive attention from both industry and scientific communities.A record efficiency of 24.06%on p-type silicon wafer and mass production efficiency around 22%have been demonstrated,mainly due to its superior rear side passivation.In this work,the PERC solar cells with a p-type silicon wafer were numerically studied in terms of the surface passivation,quality of silicon wafer and metal electrodes.A rational way to achieve a 24%mass-production efficiency was proposed.Free energy loss analyses were adopted to address the loss sources with respect to the limit efficiency of 29%,which provides a guideline for the design and manufacture of a high-efficiency PERC solar cell.

关键词： monocrystalline silicon solar cell passivated emitter rear contact numerical simulation free energy loss analysis