水辅助生长准一维氧化物纳米材料的研究进展

准一维纳米材料的研究是近十年来纳米材料研究领域的前沿和热点，吸引了物理、化学、材料、生物和信息等诸多领域的科研人员以及工业界的众多有识之士的强烈关注。本文论述了水辅助生长制备准一维氧化物纳米材料的原理，着重介绍了这一方法在准一维氧化物纳米材料的制备中的应用，并对其前景作了简要的展望。     

SiC一维、准一维纳米材料的制备工艺研究

综述了近年来SiC一维、准一维纳米材料制备工艺的最新研究进展,重点介绍了模板生长法、化学气相沉积法、熔体生长法、碳热还原法和溶胶-凝胶法的工艺特点,并对不同工艺方法制备的SiC一维、准一维纳米材料的微观形貌、优异性能进行了简要概述,总结了现阶段SiC一维、准一维纳米材料制备工艺研究所面临的问题及发展前景.     

一维纳米材料的水热合成

水热合成是制备一维纳米材料的方法之一,可以用来合成碳、金属、半导体以及氧化物等多种无机纳米材料,由于其操作简单、成本低廉以及条件温和等优点而备受青睐.简单介绍了水热技术在制备一维纳米材料上的应用、影响纳米材料生长的因素以及一维纳米材料在国内外的研究进展.     

氧化物一维纳米材料及其在锂离子电池中的应用

介绍了一系列钛氧化物一维纳米材料,包括钛酸纳米管／纳米线、锐钛矿TiO2纳米管以及尖晶石钛酸锂纳米管／纳米线的制备及其特殊的电化学储锂性能,阐明了一维纳米材料在高性能锂离子电池和复合电池中的应用前景。     

氧化物辅助生长硅纳米线

氧化物辅助生长机理是近年来在合成硅纳米线的过程中发展起来的一种研究一维纳米材料生长的机理,根据此机理已经制备出了多种一维纳米材料.介绍了氧化物辅助生长机理及其根据此机理制备硅纳米线的制备方法,载气、压力及原料等不同条件对合成硅纳米线的影响等进展情况,并对其发展作了展望.     

准一维ZnO纳米材料及器件的研究进展

准一维纳米ZnO因在微电子和光电子领域具有广阔前景而受到关注.综述了近年来准一维ZnO纳米材料的主流制备方法及其相关机理,介绍了一维纳米阵列的实现方案,总结了各类准一维ZnO纳米器件的研究进展,探讨了研究现状并展望了未来的研究方向.     

一维氧化镓纳米材料研究进展

随着纳米材料制备技术和性能研究的发展,一维纳米材料日益受到人们的关注.简要介绍了一维氧化镓纳米材料的制备方法及其光致发光机理,并指出了当前研究过程中存在的问题和可能的发展方向.     

准一维纳米材料的研究现状

自从碳纳米管被发现以后,一维纳米材料作为纳电子器件的重要组成部分,其合成、材料物性以及应用已经引起了人们的广泛重视.本文从一维纳米材料的制备入手,讨论了一维纳米材料的的制备方法及其各自特点,分析了一维纳米材料形成机制,并对其表征方法做了简单的介绍,根据其特殊性能分析其潜在应用.     

功能纳米材料研究的新进展

功能纳米材料是纳米材料领域富有活力的、应用前景广阔的材料科学分支。它包括功能纳米材料的制备科学、结构、性能表征和应用科学，科学内涵丰富。功能纳米材料按维数划分有零维、准一维和二维纳米     

一维GaN纳米材料制备及其光电器件研究进展

一维GaN纳米材料相对于薄膜材料在光电器件应用方面具有诸多优势,本文主要论述一维GaN纳米材料的主要制备方法及其光电器件应用的研究进展。首先分别介绍采用MOCVD、MBE、CVD及模板法制备一维GaN纳米材料,重点论述GaN纳米材料的结构与形貌调控。其次介绍一维GaN纳米材料分别应用于主要光电器件包括LED、太阳能电池、激光器及光探测器的研究动态,讨论纳米材料性能、结构以及制备技术对其器件性能的影响。最后对一维GaN纳米材料的发展与应用前景进行展望。     

稀土氧化物纳米材料制备的研究进展

稀土氧化物纳米材料的合成与制备近年来已成为国内外学者研究的一个热点。本文介绍了国内外稀土氧化物纳米材料制备及合成方法的研究进展,并对稀土氧化物纳米材料的制备方法进行了分类。同时,综合比较了各自的优点和缺点,并对各种制备方法在各个领域的应用前景进行了一定的展望。     

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.     

Formation of hybrid structures: copper oxide nanocrystals templated on ultralong copper nanowires for open network sensing at room temperature

A facile large-scale synthesis approach for producing intrinsically p-type nanowires with uniform coverage of nanocrystals to form a highly interconnected porous nanowire network is of great demand for p-type sensing. Here, we have demonstrated synthesis of a very high aspect ratio (10(2)-10(5)) open network of interconnected hybrid nanocrystals-nanowire copper and copper oxide nanomaterials. The copper nanowire scaffold is employed to realize a porous and highly interconnected network of hybrid metal-metal oxide nanocrystal-nanowire structures. The structural and composition tunability of the hybrid nanomaterials is demonstrated. The hybrid copper-copper oxide nanowires exhibit enhanced gas/light sensing properties without any operating temperature. This may be attributed to enhanced medium diffusion due to the porous network of highly interconnected nanocrystal-nanowire structures.     

Synthesis of gallium oxide nanomaterials on source material supply and their growth behavior

High purity and single crystalline beta-Ga2O3 nanomaterials with various morphologies were obtained through the simple thermal evaporation of metal gallium powder on a gold-coated silicon substrate in argon. In this report, the growth behavior of the beta-Ga2O3 nanomaterials as a function of synthesis time and source material supply was delicately surveyed via FESEM and HRTEM. The synthesis time and source material supply affected morphology, growth rate and growth mechanism of the grown nanomaterials. It was confirmed that the growth mechanism of the beta-Ga2O3 nanomaterials was varied in the order of VLS, combination of VLS and VS, and VS, by increasing the synthesis time without regard to the supply of the source material. When the source materials supply was increased, many beta-Ga2O3 nanomaterials with various morphologies, such as sheet, triangle, and belt-like were appeared. It was confirmed that the oxidation reaction of gallium and oxygen for the formation of gallium oxide nanomaterials carried out the precipitation of gallium at the same time due to the supersaturation of the gallium atoms in gold catalyst. The growth and formation mechanism of the beta-Ga2O3 nanomaterials are discussed herein.     

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.     

Electrical conductivity of water- based nanofluids prepared with graphene – carbon nanotube hybrid

Graphene, Carbon Nanotubes and their hybrids are receiving considerable attention in energy storage devices due to their unique properties. The present study reports the synthesis of Graphene–Carbon Nanotube hybrid having variable ratios of the constituting nanomaterials by employing two different chemical routes to explore their potential in energy storage devices. To study the structure and morphology of synthesized nanomaterials, all samples were characterized by high resolution imaging and spectroscopy techniques. Electrical conductivity of synthesized Graphene-Carbon Nanotube hybrid, graphene oxide and carbon nanotubes was measured by two probe method to study whether the conductivity of hybrid is greater than that of graphene and carbon nanotubes. It was observed that hybrid exhibited excellent stability due to strong π-π interaction between carbon nanotubes and graphene oxide sheets. The maximum electrical conductivity was obtained for the hybrid in which amount of graphene oxide was more than that of multiwalled carbon nanotubes. Moreover, the results of electrical conductivity demonstrated that the structure of hybrid plays significant role in improving its properties.     

Phase selection enabled formation of abrupt axial heterojunctions in branched oxide nanowires

Rational synthesis of nanowires via the vapor-liquid-solid (VLS) mechanism with compositional and structural controls is vitally important for fabricating functional nanodevices from bottom up. Here, we show that branched indium tin oxide nanowires can be in situ seeded in vapor transport growth using tailored Au-Cu alloys as catalyst. Furthermore, we demonstrate that VLS synthesis gives unprecedented freedom to navigate the ternary In-Sn-O phase diagram, and a rare and bulk-unstable cubic phase can be selectively stabilized in nanowires. The stabilized cubic fluorite phase possesses an unusual almost equimolar concentration of In and Sn, forming a defect-free epitaxial interface with the conventional bixbyite phase of tin-doped indium oxide that is the most employed transparent conducting oxide. This rational methodology of selecting phases and making abrupt axial heterojunctions in nanowires presents advantages over the conventional synthesis routes, promising novel composition-modulated nanomaterials.     

Recent progress in hydrothermal synthesis of zinc oxide nanomaterials

Hydrothermal synthesis is of considerable interest due to its low cost, simplicity and relatively low growth temperature (typically below 200 °C). Since the synthesis is performed in aqueous solutions (no organic solvents), it can also be safe and environmentally friendly (depending on precursor chemicals). Consequently, it has been a subject of intense research in recent years. In this article, we review recent progress in hydrothermal synthesis of zinc oxide nanomaterials, with focus on practical relevance for a variety of applications.     

High rate flame synthesis of highly crystalline iron oxide nanorods

Single-step flame synthesis of iron oxide nanorods is performed using iron probes inserted into an opposed-flow methane oxy-flame. The high temperature reacting environment of the flame tends to convert elemental iron into a high density layer of iron oxide nanorods. The diameters of the iron oxide nanorods vary from 10 to 100?nm with a typical length of a few microns. The structural characterization performed shows that nanorods possess a highly ordered crystalline structure with parameters corresponding to cubic magnetite (Fe(3)O(4)) with the [100] direction oriented along the nanorod axis. Structural variations of straight nanorods such as bends, and T-branched and Y-branched shapes are frequently observed within the nanomaterials formed, opening pathways for synthesis of multidimensional, interconnected networks.