类石墨烯硫族化合物纳米材料及其在能源领域中的应用

2004年以来,以石墨烯为代表的新型二维纳米材料引起了全球范围内的研究热潮,在光电子、生物、能源等领域展现出了巨大的应用潜力。过渡金属硫族化合物因平面内结合力较强、平面外结合力较弱以致可以将其剥离成单个细胞厚度的二维层状纳米材料,且该材料具备类石墨烯物理化学性质而被誉为"无机石墨烯"。关于二维过渡金属硫族化合物纳米材料的研究已有多年,众多研究表明,因其具有独特的结构和特性,在光电器件、催化及能源存储领域有着广阔的应用前景。基于该领域研究的最新进展,综述了二维过渡金属硫族化合物纳米材料在能源领域中的应用,并对目前相关研究领域的发展趋势进行了总结和展望。     

二维过渡金属碳氮化合物的生物医学应用

二维过渡金属碳化物、氮化物及碳氮化合物(MXenes)是一类新兴的二维纳米材料.由于其独特的光、电、磁、热等物理化学性能,MXenes二维材料被广泛应用到能源储备、环境监测、化学催化等领域.由于其大的比表面积、优异的近红外吸收和组分可调换等性质,近年来在生物医学方面也得到了快速的发展.简要介绍了MXenes二维纳米材料...     

过渡金属硫族化合物二维晶体基复合材料的研究进展

石墨烯的发现掀起了人们对二维晶体材料的探索热潮。单层或少数层过渡金属硫族化合物(TMDs)是二维晶体材料的典型代表,此类材料的带隙合适、电子迁移率和热导率高、光吸收强、比表面积大,在新型光电器件、光/电催化、锂离子电池电极、气体传感及生物医学等领域蕴藏着巨大的应用潜能。特别是,对于TMDs二维晶体与其他材料复合而成的纳米结构,强烈的界面耦合作用对材料物理和化学特性的调控至关重要,甚至可能导致新奇特性,预示着新功能和新应用。详细综述了TMDs二维晶体基复合材料的制备方法、结构与性能的界面调控及其潜在应用,并指出了该研究领域仍存在的问题及未来发展方向。     

金属元素掺杂二维过渡族金属硫化物研究进展

传统二维材料具有丰富的电学、光学特性?在电子器件领域中占据着重要位置?金属元素掺杂二维过渡族金属硫化物不仅可以保持原过渡族金属硫化物所特有的优越性能?还可赋予二维材料特定的铁磁、铁电性能?使其在光学器件、自旋电子学器件以及信息和数据存储等领域得到更广泛的应用?重点介绍了金属元素掺杂过渡族金属硫化物的理论和制备方法?对其结构特性、电子特性以及磁学特性进行了详细讨论?并且着重论述了金属元素掺杂在过渡族金属硫化物中的实验合成方法?其中?化学气相沉积法、化学气相传输法被广泛使用?其他实验方法如固相法、磁控溅射法也可结合运用?最后展望了金属元素掺杂过渡族金属硫化物研究面临的挑战以及未来磁性二维材料的发展方向?     

石墨烯纳米材料在药物释放和基因传递中的应用

石墨烯纳米材料由于其独特的结构和优良的机械、光学和电学性能,已经在物理、化学和材料科学等领域广泛应用。最新研究表明其特殊的属性可应用在生物医学领域的,综述了石墨烯纳米材料在生物医学领域如药物释放和基因传递中的应用,最后指出了石墨烯纳米材料在生物医学领域应用中目前存在的问题。     

衬底位置对制备二维的MoS_2的影响

新型的二维层状材料凭借着其优异的机械、光学、电学等独特性能受到研究者广泛关注,二维层状材料如石墨烯、过渡金属硫族化合物等在柔性器件等领域具有潜在的应用前景,成为了现阶段研究热点之一;然而,应用的前提是高质量的二维材料大面积可控制备。利用化学气相沉积方法制备了二维的MoS_2,探讨了放置衬底的差异对合成二维的MoS_2的影响。结果表明,在其它相同的实验条件下,face-up和face-down的放置位置制备的MoS_2具有不同的形状、在衬底上的覆盖率不同;尽管如此,两种放置情况下,获得的单层的MoS_2具有类似的结构和荧光特性。研究结果对可控合成二维的MoS_2以及其它的TMDs均具有指导意义和参考价值。     

氮化硼二维纳米材料剥离制备技术研究进展

氮化硼二维纳米材料具有与石墨烯相当的强度、较宽的带隙、优良的化学稳定性和热稳定性,在绝缘、含氧、高温的条件下具有独特的应用价值,其制备技术及性能的研究是近年来材料科学领域研究的热点之一。剥离制备方法尤其是化学剥离法具有成本低、质量好、容易控制等优点,是制备氮化硼二维纳米材料的有效方法。本文详述了各种剥离方法制备氮化硼二维纳米材料的现状、存在的问题,指出深入研究剥离机理、开发新型高效剥离方法、制备稳定单层氮化硼应该是今后本领域的重点研究方向。     

荧光纳米材料及其生物成像应用

荧光成像是生物医学研究领域应用最广的成像技术之一。随着纳米技术的快速发展,具有优良特性的荧光纳米材料不断涌现。相比于传统的荧光分子,荧光纳米材料具有光学稳定性高、形貌尺寸易调控、多功能化等优点。利用荧光纳米材料作为探针的生物荧光成像能够为研究者提供从细胞、离体组织到活体生物样本的结构和动态信息等方面全面细致的探测方法,成为当前材料、光学、生物医学等多学科交叉领域的研究热点。结合近年来荧光纳米材料及其生物成像应用的发展趋势以及本课题组前期的研究工作基础,归纳概述了几种类型荧光纳米材料的特性,包括基于有机荧光染料的纳米颗粒、半导体量子点、碳基荧光纳米材料以及稀土掺杂上转换发光纳米材料,结合具体例子介绍了荧光纳米材料在生物医学成像中的应用,并对其发展前景进行了展望。     

二维纳米材料/环氧树脂复合涂层在腐蚀防护中的应用

二维纳米材料具有片层结构、致密的六方晶格、大的比表面积和优异的热化学稳定性等特点,是作为防腐涂层填料的最佳选择。本论文综述了二维纳米材料在腐蚀防护复合涂层领域的应用。首先介绍了二维纳米材料在环氧树脂防腐涂料的屏障保护作用、抑制保护作用和牺牲保护作用,然后阐述了常见二维纳米材料在环氧树脂防腐涂料中的应用途径和方式。此外,本论文还总结了二维纳米材料在防腐涂料应用中存在的分散、取向以及与金属基体的附着力等问题及其解决办法。最后,对二维纳米材料在环氧树脂防腐涂料中的应用进行了总结和展望。     

二维纳米材料的自上而下制备:可控液相剥离

二维纳米材料独特的结构特征赋予了其众多的优异性质,充分利用这些特性有利于实现新材料的制备和新产品的开发,而二维纳米材料的规模化可控制备是实现其广泛应用的必要前提。在众多制备二维纳米材料的各类方法中,基于层状前驱体的液相剥离法以其较高的效率和良好的操控性等优点受到了广泛关注。本文详细阐述了二维纳米材料的优异特性及其潜在应用,并以目前研究最为广泛的几种二维纳米材料为例,重点介绍了几种常见的基于三维层状晶体的液相剥离以制备二维纳米材料的方法,最后对各种液相剥离法的适用性进行总结,并对二维纳米材料的发展前景进行展望。     

One-dimensional 8-hydroxyquinoline metal complex nanomaterials: synthesis,optoelectronic properties,and applications

One-dimensional (1D) 8-hydroxyquinoline metal complex nanomaterials exhibit distinctive characteristics that differ from those of their bulk counterparts. Owing to their small size, shape anisotropy, unique structures, and novel properties, these organometallic 1D nanostructures are promising candidates for various devices. This review highlights current progress in the synthesis of 1D 8-hydroxyquinoline metal complex nanomaterials and summarizes their optoelectronic properties and applications. The mainly synthetic strategies are divided into three categories, which include vapor phase growth, solution phase growth, and self-assembly. Special attention is paid to the formation mechanisms and the control measures for 1D nanostructured 8-hydroxyquinoline metal complexes. Other new methods such as template-based synthesis and electrospinning are briefly described. Merits and shortcomings of each synthetic strategy are simply discussed. Then, a variety of optoelectronic properties including luminescence, field emission, charge transport, photoconductivity, and photo-switching properties are reviewed, and their applications in optoelectronic devices, field emission, and templates are also surveyed. In the end, concise conclusions are provided, and personal perspectives on future investigations of 1D 8-hydroxyquinoline metal complex nanomaterials are proposed.     

Emerging 2D nanomaterials for biomedical applications

Two-dimensional (2D) nanomaterials are an emerging class of biomaterials with remarkable potential for biomedical applications. The planar topography of these nanomaterials confers unique physical, chemical, electronic and optical properties, making them attractive candidates for therapeutic delivery, biosensing, bioimaging, regenerative medicine, and additive manufacturing strategies. The high surface-to-volume ratio of 2D nanomaterials promotes enhanced interactions with biomolecules and cells. A range of 2D nanomaterials, including transition metal dichalcogenides (TMDs), layered double hydroxides (LDHs), layered silicates (nanoclays), 2D metal carbides and nitrides (MXenes), metal–organic framework (MOFs), covalent organic frameworks (COFs) and polymer nanosheets have been investigated for their potential in biomedical applications. Here, we will critically evaluate recent advances of 2D nanomaterial strategies in biomedical engineering and discuss emerging approaches and current limitations associated with these nanomaterials. Due to their unique physical, chemical, and biological properties, this new class of nanomaterials has the potential to become a platform technology in regenerative medicine and other biomedical applications.     

Synthesis, Growth Mechanism, and Applications of Zinc Oxide Nanomaterials

This article reviews recent progresses in growth mechanism, synthesis, and applications of zinc oxide nano-materials （mainly focusing on one-dimensional （1D） nanomaterials）. In the first part of this article, we briefly introduce the importance, the synthesis methods and growth mechanisms, the properties and applications of ZnO 1D nanomaterials. In the second part of this article, the growth mechanisms of ZnO 1D nanomaterials will be discussed in detail in the framework of vapor-liquid-solid （VLS）, vapor-solid （VS）, and aqueous solution growth （ASG） approaches. Both qualitative and quantitative information will be provided to show how a controlled synthesis of ZnO 1D nanomaterials can be achieved. In the third part of this article, we present recent progresses in our group for the synthesis of ZnO 1D nanomaterials, and the results from other groups will only be mentioned briefly. Especially, experiment designing according to theories will be elaborated to demonstrate the concept of controlled synthesis. In the fourth part of this article, the properties and potential applications of ZnO 1D nanomaterials will be treated. Finally, a summary part will be presented in the fifth section. The future trend of research for ZnO 1D nanomaterials will be pointed out and key issues to be solved will be proposed.     

1D Ceria Nanomaterials:Versatile Synthesis and Bio-application

Ceria has emerged as a fascinating and lucrative material in bio-application,for instance,disease treatment,bioimaging and drug delivery due to its abilities of transforming oxidation states between Ce~(4+) and Ce~(3+) and scavenging free radicals,which can produce biological effect,such as being potentially antioxidant towards reactive oxygen species.Recently,many studies about one dimension(ID) CeO_2nanomaterials have received much attention because of the unique properties of their length and aspect ratio.We highlight here current research activities focused on the bio-application of 1D ceria nanomaterials.The synthesis methods of 1D cerium oxide nanomaterials were introduced.Several synthesis routes,including template,hydrothermal,sonochemical and other methods,were then discussed with examples developed by recent research.The differences among these methods were also analyzed.This review provides a comprehensive introduction to the synthesis of 1D ceria,its potential applications in biological fields and perspectives on this exciting realm.     

Antibacterial applications of elemental nanomaterials

The emergence and spread of antimicrobial resistance call for the development of antibacterial substances that may be able to circumvent the resistance mechanisms of bacteria. To this end, intensive research efforts have been directed toward non-antibiotic materials with antibacterial potency. In particular, single-element inorganic nanomaterials have demonstrated promising activity against bacteria, and prominent examples of single-element inorganic nanomaterials include silver (Ag) nanoparticles, 0-, 1- and 2-dimensional carbon nanomaterials, and 2-dimensional black phosphorous (BP) nanosheets. With activity modes distinct from those of commercial antibiotics, these single-element inorganic nanomaterials have demonstrated activity against antibiotic-resistant bacterial strains and may delay the emergence of resistance in bacteria. In this review, we focus on silver (Ag) nanoparticles, 0-, 1- and 2-dimensional carbon nanomaterials, and 2-dimensional black phosphorous (BP) nanosheets, and discuss their antibacterial potency, factors that influence their antibacterial performances, as well as their cytotoxicity to mammalian cells.     

Controllable synthesis and biomedical applications of silver nanomaterials

Silver nanomaterials have lots of peculiar and exciting physical and chemical properties that are different from massive silver, so the synthesis and applications of silver nanomaterials have attracted a great deal of attention in the last decade. Currently, all kinds of silver nanomaterials having different shapes and sizes have been synthesized by many ingenious methods, and silver nanomaterials have exhibited extensive application prospects in many fields especially in biomedical aspect. In this article, the controllable synthesis of silver nanomaterials including nanorods, nanowires, nanotubes, nanoprisms, nanoplates, nanodisks, nanospheres, and nanopolyhedrons, etc. are reviewed. Silver nanomaterials are most utilized in the form of nanoparticles, so the main biomedical applications of silver nanoparticles, such as antibacterial and antiviral applications, antitumor applications, biosensors and biological labels, optical imaging and imaging intensifier, are discussed. Although antibacterial applications are still the most important aspects of silver nanomaterials at present, antitumor, optical sensors and imaging applications of silver nanomaterials have also shown good potential perspectives. More biomedical applications of silver nanomaterials still need to be exploited for the future, and the biological safety of silver nanomaterials also should be paid enough attention before their practical applications.     

Regulating the Electrical Behaviors of 2D Inorganic Nanomaterials for Energy Applications

Recent years have witnessed great developments in inorganic 2D nanomaterials for their unique dimensional confinement and diverse electronic energy bands. Precisely regulating their intrinsic electrical behaviors would bring superior electrical conductivity, rendering 2D nanomaterials ideal candidates for active materials in electrochemical applications when combined with the excellent reaction activity from the inorganic lattice. This Concept focuses on highly conducting inorganic 2D nanomaterials, including intrinsic metallic 2D nanomaterials and artificial highly conductive 2D nanomaterials. The intrinsic metallicity of 2D nanomaterials is derived from their closely packed atomic structures that ensure maximum overlapping of electron orbitals, while artificial highly conductive 2D nanomaterials could be achieved by designed methodologies of surface modification, intralayer ion doping, and lattice strain, in which atomic‐scale structural modulation plays a vital role in realizing conducting behaviors. Benefiting from fast electron transfer, high reaction activity, as well as large surface areas arising from the 2D inorganic lattice, highly conducting 2D nanomaterials open up prospects for enhancing performance in electrochemical catalysis and electrochemical capacitors. Conductive 2D inorganic nanomaterials promise higher efficiency for electrochemical applications of energy conversion and storage.     

25th Anniversary Article: Hybrid Nanostructures Based on Two‐Dimensional Nanomaterials

Two‐dimensional (2D) nanomaterials, such as graphene and transition metal dichalcogenides (TMDs), receive a lot of attention, because of their intriguing properties and wide applications in catalysis, energy‐storage devices, electronics, optoelectronics, and so on. To further enhance the performance of their application, these 2D nanomaterials are hybridized with other functional nanostructures. In this review, the latest studies of 2D nanomaterial‐based hybrid nanostructures are discussed, focusing on their preparation methods, properties, and applications.     

Emerging Porous Two-Dimensional Materials: Current Status,Existing Challenges,and Applications

Two-Dimensional (2D) materials have attracted immense attention in recent years. These materials have found their applications in various fields, such as catalysis, adsorption, energy storage, and sensing, as they exhibit excellent physical, chemical, electronic, photonic, and biological properties. Recently, researchers have focused on constructing porous structures on 2D materials. Various strategies, such as chemical etching and template-based methods, for the development of surface pores are reported, and the porous 2D materials fabricated over the years are used to develop supercapacitors and energy storage devices. Moreover, the lattice structure of the 2D materials can be modulated during the construction of porous structures to develop 2D materials that can be used in various fields such as lattice defects in 2D nanomaterials for enhancing biomedical performances. This review focuses on the recently developed chemical etching, solvent thermal synthesis, microwave combustion, and template methods that are used to fabricate porous 2D materials. The application prospects of the porous 2D materials are summarized. Finally, the key scientific challenges associated with developing porous 2D materials are presented to provide a platform for developing porous 2D materials.     

类石墨烯结构二维氮化硼材料:结构特性、合成方法、性能及应用

石墨烯的发现和成功制备引起了人们对二维材料的研究热潮。六方氮化硼(h-BN)薄膜作为类石墨烯结构的二维层状材料,也是当前的研究热点。介绍了h-BN及其相应的低维纳米结构,并概述了近期对二维BN纳米材料的形貌、合成、性能和应用的研究进展。目前对一维和二维纳米材料的研究表明,BN纳米材料具有诸多优异性能,包括高温稳定性、低介电常数、高力学性能、高热导率、高硬度和高耐腐蚀性,BN纳米材料系统已成为最具前景的非碳纳米系统,在不远的将来将有广泛的应用。