碳纳米管的研究进展

碳纳米管是国际新材料领域的研究前沿和热点,详细综述了碳纳米管的结构与性能,近年来碳纳米管的各种制备方法和纯化方法,以及在各领域的应用研究及其最新研究进展;并展望了碳纳米管的应用和研究前景.     

碳纳米管的电化学性质及其应用研究

把碳纳米管作为一种新型的电极材料是开发碳纳米管应用的一个新的方向。本文研究了碳纳米管的化学修饰和电化学性质,发现决定碳纳米管电化学性质的两个重要因素。系统地总结了我们在碳纳米管电极的制备、碳纳米管电极的电化学响应、碳纳米管电极的生物电分析和电氧化有毒化成分应用方面的研究成果。     

双壁碳纳米管研究进展

单壁碳纳米管和多壁碳纳米管的合成和应用研究得到广泛的关注和重视，并已取得了许多令人鼓舞的成果。双壁碳纳米管(DWCNTs)作为介于单壁碳纳米管和多壁碳纳米管之间的一种特殊结构碳纳米管，由于潜在的应用价值及作为研究碳纳米管层间作用最简单和理想的模型开始得到高度重视。介绍了双壁碳纳米管合成方法及理论和应用研究取得的进展。     

碳纳米管的研究进展

碳纳米管是国际新材料领域的研究前沿和热点，详细综述了碳纳米管的结构与性能，近年来碳纳米管的各种制备方法和纯化方法，以及在各领域的应用研究及其最新研究进展；并展望了碳纳米管的应用和研究前景。     

碳纳米管的应用研究

碳纳米管是材料科学领域的研究热点,在许多方面都有吸引人的应用前景.综述了当前碳纳米管在电子技术、环境监测和能源利用、催化学等方面应用研究的现状.并展望了碳纳米管的应用前景.     

碳纳米管的功能化修饰及应用研究进展

碳纳米管以其独特的一维结构,优良的力学、电学、光学等性能,受到学术界的广泛关注。但是在实际应用中由于其纳米材料的强大范德华力,碳纳米管很容易聚集在一起。同时碳纳米管不溶于水及有机溶剂,所以限制了其在实际中的应用。因此要对碳纳米管进行表面改性,使其在溶剂中能良好地分散。主要介绍近年来碳纳米管的改性方法,以及在实际应用方面的研究。     

碳纳米管及其复合材料在固体火箭推进剂中的应用研究进展

文章从碳纳米管、碳纳米管复合物及储氢碳纳米管三方面综述了碳纳米管及其复合材料在推进剂中的应用研究进展,总结了碳纳米管、碳纳米管复合物对推进剂及其组分的不同催化效果,指出碳纳米管复合物是推进剂燃烧催化剂未来研究的重点方向,同时分析了储氢碳纳米管的研究现状,提出储氢碳纳米管作为新型含能材料添加物是发展高能推进剂的可能途径之     

碳纳米管在X射线管中的应用

迄今碳纳米管的制备技术业已成熟,正逐渐向它的应用进行研究.主要介绍了碳纳米管在X射线管中的应用,给出了两种碳纳米管场致发射X射线管.     

碳纳米管的特性及应用

介绍了巴基球及碳纳米管的发现和历史 ,重点介绍了碳纳米管的基本性能和晶体结构 ,描述了碳纳米管电传导和热传导的机理。文中还介绍了碳纳米管的主要生产方法和各自的优点。根据全球碳纳米管应用研究的方向 ,对碳纳米管的应用领域进行了探讨 ,展望了碳纳米管的应用前景及商业开发价值     

碳纳米管膜在空气净化领域的研究进展

系统介绍了碳纳米管膜的研究现状,分析了采用化学气相沉积法实现碳纳米管在直径、长度上可控制备的关键因素,探讨了不同类型碳纳米管膜的制备方法,总结了膜在超细颗粒物过滤、油烟分离、微生物去除、有害气体降解等空气净化方面的应用,展示了碳纳米管基膜在多功能空气净化中的应用前景.最后探讨了碳纳米管膜目前研究存在的问题,并对未来发展方向进行了展望.     

Complete solution of elastica for a clamped-hinged beam, and its applications to a carbon nanotube

Summary This paper treats an exact elastica solution for a clamped-hinged beam, and its applications to a carbon nanotube. Although the elastica has a long history, and the exact post-buckling solution for the Euler buckling problem has been known for at least 150 years, it seems that the elastica solution for a post-buckled clamped-hinged beam has never been obtained. Therefore, the exact solution obtained in this paper constitutes an addition to the existing family of elastica solutions. As an application of the results, a post-buckling analysis of a single wall carbon nanotube is studied. Also, a potential use of the post-buckling analysis of the carbon nanotube for the determination of its Young's modulus has been indicated.     

pH-controlled carbon nanotube aggregation/dispersion based on intermolecular i-motif DNA formation

In this work, we report a new strategy to manipulate the aggregation and dispersion of carbon nanotube in solution via formation of intermolecular i-motif (four-stranded C-quadruplex) structures in a pH dependent manner. Firstly, single-stranded (ss) DNAs containing two stretches of cytosine (C)-rich domains are covalently linked to carbon nanotubes. At pH 8.0, DNAs are at random coil state, which enhance the dispersion of multi-wall carbon nanotubes (MWNTs) in water; after changing pH to 5.0, the intermolecular i-motif structures formed by the C-rich ssDNAs on neighboring carbon nanotube could drive the MWNTs aggregate. This process is reversible and the transition process has been verified by circular dichroism (CD) spectroscopy, gel electrophoresis and transmission electron microscopy (TEM). Considering the mechanical properties of carbon nanotube, this finding will benefit many application research fields, such as artificial muscle, functional nano-devices and so on.     

Carbon nanotube-based functional materials for optical limiting

Optical limiting is an important application of nonlinear optics, useful for the protection of human eyes, optical elements, and optical sensors from intense laser pulses. An optical limiter is such a device that strongly attenuates high intensity light and potentially damaging light such as focused laser beams, whilst allowing for the high transmission of ambient light. Optical limiting properties of carbon nanotube suspensions, solubilized carbon nanotubes, small molecules doped carbon nanotubes and polymer/carbon nanotube composites have been reviewed. The optical limiting responses of carbon nanotube suspensions are shown to be dominated by nonlinear scattering as a result of thermally induced solvent-bubble formation and sublimation of the nanotubes, while the solubilized carbon nanotubes optically limit through nonlinear absorption mechanism and exhibit significant solution-concentration-dependent optical limiting responses. In the former case the optical limiting results are independent of nanotube concentrations at the same linear transmittance as that of the solubilized systems. Many efforts have been invested into the research of polymer/carbon nanotube composites in an attempt to allow for the fabrication of films required for the use of nanotubes in a real optical limiting application. The higher carbon nanotube content samples block the incident light more effectively at higher incident energy densities or intensities. The optical limiting mechanism of these composite materials is quite complicated. Besides nonlinear scattering contribution to the optical limiting, there may also be other contributions e.g., nonlinear absorption, nonlinear refraction, electronic absorption and others to the optical limiting. Further improvements in the optical limiting efficiency of the composites and in the dispersion and alignment properties of carbon nanotubes in the polymer matrix could be realized by variation of both nanostructured guest and polymer host, and by ex situ alignment and other methods. It would be very desirable, from the practical application point of view, if one can design broadband optical limiting chromophores that would function in a multimechanistic fashion.     

碳纳米管应用研究现状与进展

本文综述了近年来碳纳米管在场发射、分子电子器件、复合增强材料、超级电容器、储氢材料、催化剂材料、锂离子充电电池电极材料等方面应用研究的现状与进展；并对纳米管的应用前景进行了展望。     

基于碳纳米管薄膜构建场发射平面显示器的阴极结构

碳纳米管场发射平面显示器具有工作电压低、功耗低和制造成本低等优势,近年来基于碳纳米管场发射平面显示器的研究与应用研发已成为显示技术领域研究的热点之一,并已取得丰富成果。简要回顾了碳纳米管用于场发射的机理以及用于场发射平面显示器的优势,主要介绍了碳纳米管用于场发射平面显示器研究的一些进展和一些亟待解决的问题,包括碳纳米管阴极薄膜的制备、碳纳米管阴极工作稳定性与寿命的改进以及阴极结构的设计等,并展望了碳纳米管用于场发射平面显示器的发展前景。     

新型一维材料--单壁碳纳米管的制备和应用研究

本文简要综述了单壁碳纳米管的最新进展.主要介绍了最近两年单壁碳纳米管的制备技术发展情况,包括电弧放电,化学气相沉淀,激光蒸发和太阳能方法.展望了其在储氢材料,纳米电子器件等领域的应用前景.讨论了影响单壁碳纳米管制备及实际应用的几个关键因素.提出了单壁碳纳米管的发展方向.     

Electrochemically grown Pd nanoparticles used for synthesis of carbon nanotube by microwave plasma enhanced chemical vapor deposition

Pd nanoparticles of well-defined shapes with face centered cubic structure were grown electrochemically on silicon substrates with high degree of reproducibility. As direct application of these electrochemically grown Pd nanostructures they have been used as catalyst for the growth of multi wall carbon nanotube (MWCNT). It is observed that the MWCNTs are filled with a Pd based material during growth by microwave plasma enhanced chemical vapor deposition (MPECVD) technique. High-resolution transmission electron microscopy, used to study the material inside MWCNT suggests the formation of PdH0.649 or Pd2Si during the growth of carbon nanotube. Raman spectroscopy has been used to study the structure of the MPECVD grown carbon nanotubes.     

Polyisoprene-multi wall carbon nanotube composite structure for flexible pressure sensor application

The major problem of conventional rigid sensor materials is difficulty to integer them into soft flexible structures. Piezoresistive polyisoprene/nanostructured carbon composite appears as promising materials for such application. Previous research approved high structure carbon black and carbon nanotube filled composites as finger pressure sensitive piezoresistive materials. Carbon nanotubes originate with variable length to width ratio and high electric conductivity in longitudinal direction of the tubes, which theoretically should make it possible to obtain electric percolation in polymercarbon nanotube composites at very low loads of filler. However recent experience with mechanically dispersed carbon nanotubes shows quite high values of percolation threshold and specific sensing properties. In this work we present an attempt to use ultrasound for improved dispersion of the filler in a piezoresistive polyisoprene-multi wall carbon nanotube composite as well polyisoprene-high structure carbon black composite. The noticeable shift of percolation threshold for both types of composites have been achieved. The piezoresistive behavior of sonicated composites have been determined and compared with mechanically mixed ones. The differences have been evaluated and explained.     

Carbon nanotube dispersion in nematic liquid crystals: An overview

The aim of present review article is to present a comprehensive and current overview of scientific advancement in liquid crystal and carbon nanotube suspension. Particular attention has been paid to the recent developments and fundamental understanding of carbon nanotube dispersion in nematic liquid crystals. The dispersion and interaction of carbon nanotube in liquid crystal matrices and more elaborately the effect of dispersion on the properties of liquid crystalline materials has been extensively discussed. Recent progress has shown that even a very minute concentration of carbon nanotube in liquid crystals can have a reflective impact on the electrical and optical properties of liquid crystals. Liquid crystals provide a distinctive environment for controlling the alignment of carbon nanotubes whereas carbon nanotubes are important for the enhancement and fine-tuning of liquid crystalline properties. Potential applications of liquid crystal and carbon nanotube suspension are briefly discussed. Conclusion and future perspectives of this rapidly emerging field is provided at the end.