Applications of carbon nanotubes
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Hydrothermal Synthesis of Flower-Like MoS2 Nanoparticle
MoS2纳米花以MoO3和Na2S为前驱体，在230℃下采用水热法反应6 h合成。MoO3为反应提供钼源，Na2S为反应提供硫源，同时还作为反应中的还原剂。产物通过XRD和SEM、Raman光谱表征其特性。MoS2纳米花是由几十到上百个花瓣组织构成的，平均花径约为200~300 nm，边缘厚度约为5~10 nm的薄片花瓣从一个中心向各个方向放射性生长。对比反应温度和盐酸的浓度的对合成MoS2纳米花的影响，结果表明其最佳实验条件为：反应温度为230℃，盐酸浓度为0.4 mol/L，反应时间为6 h。实验结果表明，采用此方法合成MoS2纳米花晶相纯，没有杂质且反应时间短，实验条件要求低。同时还探究了实验可能的反应原理。Flower-l…
Process-Controlled Tensile Properties of Newly Developed Bamboo Composite Materials
Phyllostachys edulis or Moso bamboo, which is the most common bamboo species in China, has been chosen as the basis for the newly developed bamboo reinforced composite materials. Each sample employs a defined epoxy resin composition and is fabricated by the hot press forming method. The relationship between tensile st…
DIELECTRIC AND IMPEDANCE STUDY OF OPTIMIZED CADMIUM SULPHIDE THIN FILM
Cadmium sulphide thin films are deposited by the spin coating technique onto well clean four alumina substrates. Out of four thin films, one film is untreated while the rest thin films are annealed at 100°C, 200°C and 300°C. The hexagonal phase formation of CdS thin films are confirmed by X-ray diffraction studies and…
Solubility Criteria for Veterinary Drugs—Workshop Report
c,d,e ABSTRACT The objectives of this Stimuli article are to give a brief summary of discussions at a workshop, Solubility Criteria for Veterinary Products, that took place at USP headquarters in Rockville, MD, 7-8 November 2012, and to explain the new approaches that will be used to develop a new USP general chapter,…
Production of jet fuel from renewable source material
Recent demands for low aromatic content jet fuels have shown significant increase in the last 20 years. This was generated by the growing of aviation. Furthermore, the quality requirements have become more aggravated for jet fuels. This was generated by the more severe environmental regulations and the increasing dema…
Synthesis and Crystal Structure of a Novel Hexahomotrioxacalix[3]cryptand
In past decade, calixarenes have been attracted considerable attention due to their molecular recognition properties 1 . To enhance molecular/ionic binding ability and altered selectivity more efficient compared with the parent calixarenes, calixarenes generally be modified into different conformation isomers by intro…
ON THE EFFECT OF COMPLEXING AGENTS ON THE STRUCTURAL AND OPTICAL PROPERTIES OF CdS NANOCRYSTALS
In the present work a simple chemical method is followed to grow CdS nanocrystals at room temperature. In order to study the effect of using complexing agents we grow three CdS nanocrystals, two of them with complexing agents and the third without complexing agents. The synthesized nanocrystals were characterized usin…
THE EFFECT OF MICROSTRUCTURE ON MECHANICAL PROPERTIES OF SINGLE CRYSTAL CMSX-4 SUPERALLOY
The effect of size and volume fraction of cuboidal γ’(Ni3(Al,Ti)) precipitates on Vickers hardness and tensile properties at 950 °C of a single crystal nickel-based superalloy CMSX-4 was studied. Samples with various size and volume fraction of the cuboidal γ’ precipitates were prepared by heat treatment consisting of…
The Studies of Periphyton: From Waters to Soils
Copyright: © 2013 Wu Y. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. The term ‘periphyton’ refers to the microfloral community a…
Research Progress on Crystal Growth Mechanism of Titania/Titanate Nano-powder Materials
Chemical and physical properties of titania/titanate nanomaterials should be strongly influenced by their crystalline phases, grain sizes, morphologies and microstructures. The process of crystal growth contains phase transi- tion and morphological evolution behavior. In this review, the crystal phase transition mecha…
Voltage Generated From Mangrove Forest Sediment Microbial Fuel Cell Through MOdification Of Fuel Cell Components
Electricity can be generated from naturally occurring electro potential differences through the burial of an anode in sediment and the immersion of a cathode in the overlying body of water. Such a set-up is called a Sediment microbial fuel cell (SMFC) or benthic MFC. Mangrove forest sediment of ―Sundarbans‖ was used t…
Effect of Switching angle on Magnetizing flux and Inrush current of a Transformer
Inrush current which is sometimes known as surge, or transient current is the current drawn by electrical machine or electrically operated equipment when it is first powered by an ac or dc mains which is independent on the amount of voltage supplied. This inrush current can cause sags that trip loads. When transformer…
HCl Effect on Two Types of Ag Nanoparticles Utilizable in Detection of Low Concentrations of Organic Species
In this chapter, we deal with the impact of HCl in the concentration range of 0.1 mM – 0.1 M on characteristics of two different kinds of Ag colloids. These Ag colloids were prepared by chemical reduction of Ag + using either borohydride, or glucose in alkaline medium (i.e. the latter known as a modified Tollens metho…
Carbide Particle-Reinforced Tungsten Composites in Extreme Hazard Environments
The ablation as well as the associated thermal shock resistance of tungsten composites reinforced by TiC and ZrC particles is investigated with an oxyacetylene equipment. 30TiC/W (30TiC stands for 30 vol. % TiC particle content in tungsten, the same below) and 40TiC/W fail to withstand the thermal shock of 2000ºC/s du…
Resonant diffraction gratings for differentiation of optical signals in reflection and transmission
The propagation of an optical pulse through a diffraction grating with a resonance at the pulse’s central frequency is considered. It is demonstrated that afore-mentioned gratings can perform time-domain differentiation of optical pulses in reflection and transmission. The correlation between the amplitude of the tran…
Biological Synthesis of Silver Nanoparticles and Assessment of Their Bactericidal Activity
Synthesis of silver nanoparticles (AgNPs) was carried out by a simple green method using extracts of two brown algal species ( Sargassum sp. and Turbinaria sp.) as reducing agents for the first time. The effect of duration of the extraction of the algal species from the respective biomass was studied in water at 110 °…
Lanthanide-Based Upconversion Nanoparticles for Connexin-Targeted Imaging in Co-cultures
From the perspective of deep tissue imaging, it is required that the excitation light can penetrate deep enough to excite the sample of interest and the fluorescence emission is strong enough to be detected. The longer wavelengths like near infrared are absorbed less by the tissue and are scattered less implying deepe…
The progress of silicon-based grating couplers
Silicon-based photonic integrated chips recently have attracted great attention and actively intervened in many applications such as optical communications, optical interconnects, and optical sensing for relevant research institutions. Photonic integrated circuits are the key block to build information infrastructures…
Low Temperature Preparation Routes of Nanoporous Semi-Conducting Films for Flexible Dye-Sensitized Solar Cells
Various methods for the low temperature processing of mesoporous nanocrystalline metal oxide semiconductor (TiO2, ZnO and SnO2) have been reviewed. These routes mainly associate a deposition technique (“spin-coating”, “doctor-blading”, “dip-coating”, electrophoretic deposition, screen-printing) of metal oxide layers w…