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Two-dimensional materials： Emerging toolkit for construction of ultrathin high-efficiency microwave shield and absorber

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Frontiers of physics 2018年第4期13卷 53-91页

作者： Mingjun Hu Naibo Zhang Guangcun Shan Jiefeng Gao Jinzhang Liu Robert K. Y. Li School of Materials Science and Engineering Beihang University Beijing 100191 China Beijing Research and Development Center the 54th Research Institute Electronics Technology Group Corporation Beijing 100070 China School of Instrumentation Science and Opto-electronics Engineering Beihang University Beijing 100191 China School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 China Department of Materials Science and Engineering City University of Hong Kong Hong Kong China

Two-dimensional （2D） materials generally have unusual confined electro-strong interaction in a plane and can physical and chemical properties owing to the exhibit obvious anisotropy and a significant quantum-confinement effect, thus showing great promise in many fields. Some 2D materials, such as graphene and MXenes, have recently exhibited extraordinary electromagnetic-wave shielding and absorbing performance, which is attributed to their special electrical behavior, large specific surface area, and low mass density. Compared with traditional microwave attenuating materials, 2D materials have several obvious inherent advantages. First, similar to other nanomaterials, 2D materials have a very large specific surface area and can provide numerous interfaces for the enhanced interfacial polarization as well as the reflection and scattering of electromagnetic waves. Second, 2D materials have a particular 2D morphology with ultrasmall thickness, which is not only beneficial for the penetration and dissipation of electromagnetic waves through the 2D nanosheets, giving rise to multiple reflections and the dissipation of electromagnetic energy, but is also conducive to the design and fabrication of various well-defined structures, such as layer-by-layer assemblies, core-shell particles, and porous foam, for broadband attenuation of electromagnetic waves. Third, owing to their good processability, 2D materials can be integrated into various multifunctional composites for multimode attenuation of electromagnetic energy. In addition to behaving as microwave reflectors and absorbers, 2D materials can act as impedance regulators and provide structural support for good impedance matching and setup of the optimal structure. Numerous studies indicate that 2D materials are among the most promising microwave attenuation materials. In view of the rapid development and enormous advancement of 2D materials in shielding and absorbing electromagnetic wave, there is a strong need to summar

关键词： electromagnetic interference shielding microwave absorber graphene MXenes polymernanocomposites

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Peristalsis of nanofluid through curved channel with Hall and Ohmic heating effects

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Journal of Central South University 2019年第9期26卷 2543-2553页

作者： T.HAYAT B.AHMED F.M.ABBASI A.ALSAEDI Department of Mathematics Quaid-I-Azam UniversityIslamabad 44000Pakistan Nonlinear Analysis and Applied Mathematics(NAAM)Research group Department of MathematicsFaculty of ScienceKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics Comsats University IslamabadIslamabad 44000Pakistan

Nanofluids have attracted many scientists due to their remarkable thermophysical *** percentage of nanoparticles when added to conventional fluid significantly enhances the heat transfer *** and efficiency of nanomaterials have key role in the advancement of *** article analyzes the Hall,Ohmic heating and velocity slip effects on the peristalsis of *** boundary conditions and heat generation/absorption are considered to facilitate the heat transfer *** equations for the peristaltic flow through a curved channel are derived in curvilinear *** equations are numerically solved under the assumption of long wavelength and small Reynold *** has been observed that nanofluid enhances the heat transfer rate and reduces the fluid *** number and Hall parameter show reverse behavior in fluid motion and heat transfer *** the presence of velocity slip,the pressure gradient rapidly decreases and dominant effect is seen in narrow portion of channel.

关键词： peristalsis nanofluid Hall and Ohmic heating effects convective boundary condition velocity slip effects

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Development, applications and challenges of ReaxFF reactive force field in molecular simulations

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Frontiers of Chemical Science and Engineering 2016年第1期10卷 16-38页

作者： You Han Dandan Jiang Jinli Zhang Wei Li Zhongxue Gan Junjie Gu School of Chemical Engineering and Technology Tianjin University Tianjin 300072 China ENN group State Key Laboratory of Low Carbon Energy of Coal Langfang 065001 China Mechanical and Aerospace Engineering Carleton University 1125 Colonel By Drive Ottawa Ontario K1S5B6 Canada

As an advanced and new technology in molecular simulation fields, ReaxFF reactive force field has been developed and widely applied during the last two decades. ReaxFF bridges the gap between quantum chemistry （QC） and non-reactive empirical force field based molecular simulation methods, and aims to provide a transferable potential which can describe many chemical reactions with bond formation and breaking. This review presents an overview of the development and applications of ReaxFF reactive force field in the fields of reaction processes, biology and materials, including （1） the mechanism studies of organic reactions under extreme conditions （like high temperatures and pressures） related with high-energy materials, hydrocarbons and coals, （2） the structural properties ofnanomaterials such as graphene oxides, carbon nanotubes, silicon nanowires and metal nanoparticles, （3） interfacial interactions of solid-solid, solid-liquid and biological/inorganic surfaces, （4） the catalytic mechanisms of many types of metals and metal oxides, and （5） electrochemical mechanisms of fuel cells and lithium batteries. The limitations and challenges of ReaxFF reactive force field are also mentioned in this review, which will shed light on its future applications to a wider range of chemical environments.

关键词： ReaxFF reaction interfacial interaction catalyst mechanism nanomaterials fuel cell

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Development of Biofunctionalized Cellulose Acetate Nanoscaffolds for Heart Valve Tissue Engineering

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World Journal of Nano Science and Engineering 2016年第4期6卷 129-152页

作者： Eirini Chainoglou Varvara Karagkiozaki Theodora Choli-Papadopoulou Charisios Mavromanolis Argiris Laskarakis Stergios Logothetidis Nanomedicine group Department of Physics Aristotle University of Thessaloniki Thessaloniki Greece Department of Chemistry Aristotle University of Thessaloniki Thessaloniki Greece Cardio-Thoracic Surgery Clinic General Hospital “G. PAPANIKOLAOU” Exohi Thessaloniki Greece

Currently-used mechanical and biological heart valve prostheses have a satisfactory short-term performance, but may exhibit several major drawbacks on the long-term. Mechanical prostheses, based on carbon, metallic and polymeric components, require permanent anticoagulation treatment, and their usage often leads to adverse reactions, e.g. thromboembolic complications and endocarditis. In recent years, there is a need for a heart valve prosthesis that can grow, repair and remodel. The concept of tissue engineering offers good prospects into the development of such a device. An ideal scaffold should mimic the structural and purposeful profile of materials found in the natural extracellular matrix (ECM) architecture. The goal of this study was to develop cellulose acetate scaffolds (CA) for valve tissue regeneration. After their thorough physicochemical and biological characterization, a biofunctionalization process was made to increase the cell proliferation. Especially, the surface of scaffolds was amplified with functional molecules, such as RGD peptides (Arg-Gly-Asp) and YIGSRG laminins (Tyrosine-Isoleucine-Glycine-Serine-Arginine-Glycine) which immobilized through biotin-streptavidin bond, the strongest non-covalent bond in nature. Last step was to successfully coat an aortic metallic valve with CA biofunctionallized nanoscaffolds and cultivate cells in order to create an anatomical structure comparable to the native valve. Promising results have been obtained with CA-based nanoscaffolds. We found that cells grown successfully on the biofunctionalized valve surface thereby scaffolds that resemble the native tissues, elaborated with bioactive factors such as RGD peptides and laminins not only make the valve’s surface biocompatible but also they could promote endothyliazation of cardiac valves causing an anti-coagulant effect

关键词： Heart Valve Tissue Engineering Cellulose Acetate Scaffolds nanomaterials Polymers Atomic Force Microscopy

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Point-to-face contact heterojunctions:Interfacial design of 0D nanomaterials on 2D g-C_(3)N_(4)towards photocatalytic energy applications

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Carbon Energy 2022年第5期4卷 665-730页

作者： Xin-Quan Tan Sue-Faye Ng Abdul Rahman Mohamed Wee-Jun Ong School of Energy and Chemical Engineering Xiamen University MalaysiaSelangor Darul EhsanMalaysia Center of Excellence for NaNo Energy&Catalysis Technology(CONNECT) Xiamen University MalaysiaSelangor Darul EhsanMalaysia Low Carbon Economy(LCE)Research group School of Chemical EngineeringUniversiti Sains MalaysiaNibong TebalPulau PinangMalaysia State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamenFujianChina Shenzhen Research Institute of Xiamen University ShenzhenGuangdongChina

Green energy generation is an indispensable task to concurrently resolve fossil fuel depletion and environmental issues to align with the global goals of achieving carbon ***,a process that transforms solar energy into clean fuels through a photocatalyst,represents a felicitous direction toward ***-rich metal-free graphitic carbon nitride(g-C_(3)N_(4))is profiled as an attractive photocatalyst due to its fascinating properties,including excellent chemical and thermal stability,moderate band gap,visible light-active nature,and ease of ***,the shortcomings of g-C_(3)N_(4)include fast charge recombination and limited surface-active sites,which adversely affect photocatalytic *** the modification strategies,point-to-face contact engineering of 2D g-C_(3)N_(4)with 0D nanomaterials represents an innovative and promising synergy owing to several intriguing attributes such as the high specific surface area,short effective charge-transfer pathways,and quantum confinement *** review introduces recent advances achieved in experimental and computational studies on the interfacial design of 0D nanostructures on 2D g-C_(3)N_(4)in the construction of point-to-face heterojunction ***,0D materials such as metals,metal oxides,metal sulfides,metal selenides,metal phosphides,and nonmetals on g-C_(3)N_(4)with different charge-transfer mechanisms are systematically discussed along with controllable synthesis *** applications of 0D/2D g-C_(3)N_(4)-based photocatalysts are focused on solar-to-energy conversion via the hydrogen evolution reaction,the CO_(2)reduction reaction,and the N2 reduction reaction to evaluate the photocatalyst activity and elucidate reaction ***,future perspectives for developing high-efficiency 0D/2D photocatalysts are proposed to explore potential emerging carbon nitride allotropes,large-scale production,machine learning integration,and multidiscipli

关键词： 0D/2D heterojunction charge-transfer mechanisms g-C_(3)N_(4)nanosheets heterojunction interface photocatalysis solar-to-energy conversion

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Enhanced N_(2)-to-NH_(3)conversion efficiency on Cu3P nanoribbon electrocatalyst

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Nano Research 2022年第8期15卷 7134-7138页

作者： Qian Liu Yiting Lin Shuang Gu Ziqiang Cheng Lisi Xie Shengjun Sun Longcheng Zhang Yongsong Luo Abdulmohsen Ali Alshehri Mohamed SHamdy Qingquan Kong Jiahong Wang Xuping Sun Institute for Advanced Study Chengdu UniversityChengdu 610106China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China Shenzhen Engineering Center for the Fabrication of Two-Dimensional Atomic Crystals Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Chemistry Department Faculty of Science&Center of Excellence for Advanced Materials ResearchKing Abdulaziz UniversityP.O.Box 80203Jeddah 21589Saudi Arabia Catalysis Research group(CRG) Department of ChemistryCollege of ScienceKing Khalid UniversityP.O.Box 9004Abha 61413Saudi Arabia

Ambient electroreduction of nitrogen(N_(2))is considered as a green and feasible approach for ammonia(NH_(3))synthesis,which urgently demands for efficient *** has close relationship with catalytic activity of heterogeneous *** is attractive nanostructure,which possesses the flexibility of one-dimensional nanomaterials,the large surface area of two-dimensional nanomaterials,and lateral size confinement *** this work,Cu_(3)P nanoribbon is proposed as a highly efficient electrocatalyst for N_(2)-to-NH_(3)conversion under benign *** measured in N_(2)-saturated 0.1 M HCl,such Cu_(3)P nanoribbon achieves high performance with an excellent Faradaic efficiency as high as 37.8%and a large yield of 18.9μg·h^(−1)·mgcat.−1 at−0.2 *** also demonstrates outstanding stability in long-term electrolysis test at least for 45 h.

关键词： Cu_(3)P nanoribbon nitrogen reduction reaction ammonia electrosynthesis electrocatalysis

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Antifouling nanocomposite polymer coatings for marine applications:A review on experiments,mechanisms,and theoretical studies

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Journal of Materials Science & Technology 2022年第23期118卷 73-113页

作者： Sepideh Pourhashem Abdolvahab Seif Farhad Saba Elham Garmroudi Nezhad Xiaohong Ji Ziyang Zhou Xiaofan Zhai Majid Mirzaee Jizhou Duan Alimorad Rashidi Baorong Hou Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071China Open studio for marine Corrosion and Protection Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Nanotechnology Research Center Research Institute of Petroleum Industry(RIPI)West Entrance Blvd.Olympic VillageTehranIran Department of Materials Science and Engineering Engineering FacultyFerdowsi University of MashhadMashhadIran University of Chinese Academy of Sciences Beijing 100039China Non-Metallic Materials Research group Niroo Research InstituteTehran 14665517Iran

Marine fouling is a worldwide challenge with huge damages on industrial structures,side effects on economics of industries,and environmental and safety-related *** approaches have been used for combating fouling in the marine ***,nanocomposite polymer coatings are a novel generation of antifouling coatings with merits of toxin-free chemical composition and ease of large-scale *** such as nano-metals,nano-metal oxides,metal-organic frameworks,carbon-based nanostructures,MXene,and nanoclays have antibacterial and antifouling properties in the polymer ***,these nanomaterials can improve the corrosion resistance,mechanical strength,weathering stability,and thermal resistance of the polymer ***,in this review paper,the antifouling nanocomposite coatings are introduced and antifouling mechanisms are *** review explicitly indicates that the antifouling efficiency of the nanocomposite coatings depends on the properties of the polymer matrix,the inherent properties of the nanomaterials,the weight percent and the dispersion method of the nanomaterials within the coating matrix,and the chemicals used for modifying the surface of the nanomaterials;meanwhile,the hybrids of different nanomaterials and appropriate chemical agents could be used to improve the antifouling behavior of the prepared ***,the theoretical studies are introduced to pave the way of researchers working on theantifouling coatings,and the importance of the theoretical studies and computational modeling along with the experimental research is notified to develop antifouling coatings with high efficiency.

关键词： Antifouling nanocomposite coatings Nano-metal oxides Carbon-based nanomaterials MXene and nanoclays Theoretical studies

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PMMA纳米球的制备及其银膜包覆技术

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高等学校化学学报 2008年第10期29卷 2070-2073页

作者：陈志华吴政张其清包建军王连洲逯高清朱贤方厦门大学中国-澳大利亚联合功能纳米材料实验室物理系厦门361005 厦门大学中国-澳大利亚联合功能纳米材料实验室材料学院生物医学工程研究中心材料学院厦门361005 ARC Centre of Excellence for Functional nanomaterials University of Queensland St Lucia Brisbane Qld 4072 Australia 四川大学高分子研究所高分子材料科学与工程国家重点实验室四川610065

采用无皂乳液聚合法制备了单分散、直径为170 nm左右的聚甲基丙烯酸甲酯(PMMA)纳米球,然后利用3-甲基丙烯酰氧基丙基三甲氧基硅烷(MATS)和3-巯丙基三甲氧基硅烷(MPTMS)对PMMA纳米球进行表面改性,在其表面包覆一层均匀的巯基,通过巯基与... 详细信息

采用无皂乳液聚合法制备了单分散、直径为170 nm左右的聚甲基丙烯酸甲酯(PMMA)纳米球,然后利用3-甲基丙烯酰氧基丙基三甲氧基硅烷(MATS)和3-巯丙基三甲氧基硅烷(MPTMS)对PMMA纳米球进行表面改性,在其表面包覆一层均匀的巯基,通过巯基与银离子之间的相互作用,使银在PMMA纳米球表面成核长大,从而合成PMMA/Ag纳米球壳粒子.通过扫描电子显微镜、投射电子显微镜和紫外-可见吸收光谱测试技术对产物性能进行了表征,研究结果表明,制备的PMMA/Ag纳米球壳粒子的分散性好、包覆均匀.

关键词：无皂乳液聚合法表面改性纳米PMMA/Ag球壳结构

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LJItrasensitive H2S gas sensors based on p-type WS2 hybrid materials

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Nano Research 2018年第8期11卷 4215-4224页

作者： Georgies Alene Asrest Jose J. Baldovi Aron Dombovari Topias Jarvinen Gabriela Simone Lorite Melinda Mohl Andrey Shchukarev Alejandro Perez Paz Lede Xian Jyri-Pekka Mikkola Anita Lloyd Spetz Heli Jantunen Angel Rubio Krisztian Kordas Microelectronics Research Unit Faculty of Information Technology and Electrical Engineering University of Oulu P.O. Box 4S00FI-90014 Oulu Finland Max Planck Institute for the Structure and Dynamics of Matter Luruper Chaussee 149 22761 Hamburg Germany Nano-Bio Spectroscopy group European Theoretical Spectroscopy Facifity (ETSF) Universidad del Pals Vasco CFM SCIC-UPV/EHU-MPC DIPC A venida Tolosa 72 20018 San Sebastian Spain Technical Chemistry Department of Chemistry Chemical-Biological Centre Umea University SE-90187 Umea Sweden School of Chemical Sciences and Engineering School of Physics and Nanotechnology Yachay Tech University Urcuquf Ecuador Industrial Chemistry & Reaction Engineering Department of Chemical Engineering Johan Gadolin Process Chemistry Centre AboAkademi University FI-20500 Abo-Turku Finland Sensor and Actuator Systems Department of Physics Chemistry and Biology Link~ping University SE-58183 LinkOping Sweden

Owing to their higher intrinsic electrical conductivity and chemical stability with respect to their oxide counterparts, nanostructured metal sulfides are expected to revive materials for resistive chemical sensor applications. Herein, we explore the gas sensing behavior of WS2 nanowire-nanoflake hybrid materials and demonstrate their excellent sensitivity （0.043 ppm-1） as well as high selectivity towards H2S relative to CO, NH~, H2, and NO （with corresponding sensitivities of 0.002, 0.0074, 0.0002, and 0.0046 pprn-1, respectively）. Gas response measurements, complemented with the results of X-ray photoelectron spectroscopy analysis and first-principles calculations based on density functional theory, suggest that the intrinsic electronic properties of pristine WS2 alone are not sufficient to explain the observed high sensitivity towards H2S. A major role in this behavior is also played by O doping in the S sites of the WS2 lattice. The results of the present study open up new avenues for the use of transition metal disulfide nanomaterials as effective alternatives to metal oxides in future applications for industrial process control, security, and health and environmental safety.

关键词： ws nanowire nanoflake gas sensor H2S,O doping

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Heat transfer and nanofluid flow over a porous plate with radiation and slip boundary conditions

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Journal of Central South University 2019年第5期26卷 1099-1115页

作者： Hamid MALEKI Jalal ALSARRAF Abbas MOGHANIZADEH Hassan HAJABDOLLAHI Mohammad Reza SAFAEI Department of Mechanical Engineering Isfahan University of TechnologyIsfahan 84156-83111Iran Department of Automotive and Marine Engineering Technology College of Technological StudiesThe Public Authority for Applied Education and TrainingKuwait Biomaterial Research group Department of Materials EngineeringIsfahan University of TechnologyIsfahan 84156-83111Iran Department of Mechanical Engineering Vali-e-Asr University of RafsanjanRafsanjanIran Division of Computational Physics Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Electrical and Electronics Engineering Ton Duc Thang UniversityHo Chi Minh CityVietnam

Presence of different terms with various values can alter the thermal behavior of the nanofluids flow over porous *** aim of this research is to study the influence of nanoparticles volume fraction,nanoparticles type,suction or injection,the heat generation or absorption,the Eckert number,thermal and velocity slip parameters,and radiation on the velocity and temperature fields on the flow and heat transfer over a porous flat *** different types of nanoparticles including metal nanoparticles (Cu),metal oxide nanoparticles (Al2O3) and carbon-based nanomaterials (MWCNTs and SWCNTs) which were dispersed in the water (as based fluid) are *** governing equations are converted into the ordinary differential equations using similarity solution and solved numerically by the RKF45 *** results of the simulations showed a contradiction with the results of other researchers who expressed that using nanoparticles with higher thermal conductivity and volume fraction led to increasing heat transfer rate in nanofluids;this study proves that,in some cases,boosting the volume fraction of nanoparticles has a potential to decrease the heat transfer rate due to significant changes in values of some parameters including radiation,heat generation,and viscous dissipation.

关键词： radiation slip condition porous surface heat generation/absorption viscous dissipation nanofluid

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