Stiffening of Soft Polyelectrolyte Architectures by Multilayer Capping Evidenced by Viscoelastic Analysis of AFM Indentation Measurements
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Layered Cobaltites: Synthesis, Oxygen Nonstoichiometry, Transport and Magnetic Properties
Complex cobalt oxide perovskite-derived compounds with a general formula LnBaCo2O5+x (Ln = rare earth) attracted considerable interests because of their interesting properties: magnetic and metal-insulator transitions, giant magnetoresistance, ionic conductivity, and a structural similarity to high temperature superco…
An introduction to magnetic refrigeration
At present a great amount of research work is performed to develop new magneto caloric materials, which are the refrigerants of magnetic refrigerators. This leads to a continuous development of more performant magnetic refrigerants with higher entropy differences ∆S, higher adiabatic temperature differences ∆Tad and l…
Thermal Behavior of Nano-TiO2 in Fire-Resistant Coating
nano-TiO2 粒子的分散状态被使用传播电子显微镜学( TEM )和 Fourier 变换学习红外线的光谱学(英尺红外) .Nanoparticles 能被 nano-TiO2 的特定的 hyper-dispersant.The 改进充分在热行为和丙烯酸的聚合物的火焰延迟驱散，火抵抗的涂层被微分热分析( DTA )调查， thermogravimetry ( TG )和火抵抗的时间测试。它被表明 thatnano-TiC-2 对提高丙烯酸的聚合物和火抵抗的涂层的热稳定性，反氧化和 fire-resistantproperties 有用。
Advanced composite materials with tailored thermal properties for heat sink applications
Materials which are used as heat sinks should have a high thermal conductivity combined with a low coefficient of thermal expansion (CTE). Future electronic components will require heat sink materials with thermal conductivities above 300 W/mK and adapted CTEs which can be realized by diamond based composites. Aluminu…
DAMAGE EVOLUTION AND MICROSTRUCTURAL CHARACTERIZATION OF A CROSS-WOVEN C/SiC COMPOSITE UNDER TENSILE LOADING
The damage evolution and the associated mechanical response of a 2 dimensional C/SiC composite were investigated under monotonic and stepwise incremental loadings and unloadings.The microstructures of the samples were observed by scanning electron microscopy and the damage behavior under mechanical loading was monitor…
Chapter 11. Covalent and Non-Covalent Approaches Toward Multifunctional Carbon Nanotube Materials
A very appealing cast of nanometer scale structures that has recently drawn a lot of attention is carbon nanostructures. Of the wide range of carbon nanostructures available, carbon nanotubes (CNTs), in general, and single-wall carbon nanotubes (SWCNTs), in particular, stand out as truly unique mate...
UV-Vis and Raman Spectroelectrochemistry of Electrodeposited Polypyrrole in Hexafluorophosphate
UV-Vis and Raman spectroscopy are very useful and powerful techniques to characterize the structure of conjugated polymers in various states. Spectroelectrochemical measurements were performed in a three-electrode cell containing polypyrrole (PPY) films as active layers in contact with NaPF6 aqueous electrolyte. UV-Vi…
Effect of Bale Ageing on Cotton Fiber Chemistry, Processing Performance, and Yarn Quality
The effects of ageing as a result of extended warehouse storage of baled cotton on fiber processing characteristics have not been extensively investigated. This study attempts to address this issue by characterizing some of the chemical and physical factors of the cotton fiber both before and after storage for 2 years…
Preparation of truncated triangular silver nanoparticles by a simple and rapid method in aqueous solution
The paper brings details of a simple method for rapid synthesis of triangular silver nanoparticles and their characterization. The method presented proceeds with a simple reaction in aqueous solution at ambient temperature and nanotriangles are synthesized in a few minutes. The formation of triangular nanoparticles wa…
Synthesis and Antibacterial Activity of 1,3,4-Oxadiazole and 1,2,4-Triazole Derivatives of Salicylic Acid and its Synthetic Intermediates
Dielectric relaxation studies of alkyl methacrylate (methyl methacrylate, ethyl methacrylate and butyl methacrylate) mixtures with phenol derivatives (p-cresol, p-chlorophenol and 2,4-dichlorophenol) have been carried out using a time domain reflectometry (TDR) technique in the frequency range 10MHzto 20 GHz at 293 K.…
ANALYSIS OF NANOSTRUCTURES BY MEANS OF AUGER ELECTRON SPECTROSCOPY
In modern nanotechnology analysis such methods are needed which are able to investigate extremely small volumes, thus surface sensitive techniques with a high spatial and depth resolution. Concerning the capability of high lateral and depth resolution, Auger electron spectroscopy (AES) is one of the outstanding analyt…
Sol-gel Synthesis and Characterization of Kalsilite-type Alumosilicates
In this paper, the sol-gel synthesis and characteristic properties of kalsilite-type alumosilicates (KAlSiO4 and K0.5Na0.5AlSiO4) are reported. The polycrystalline powders were characterized by thermal analysis (TG/DTA), powder X-ray diffraction analysis (XRD), IR spectroscopy and scanning electron microscopy (SEM). S…
Advanced Composite Materials for Heat Sink Applications
Novel heat sink materials reinforced with diamonds have been produced via powder metallurgy. As matrix, several copper alloys containing boron have been chosen. Prepared composites have been investigated regarding microstructure and the various properties such as thermal conductivity, thermal expansion, etc. Light and…
Vacancy-Induced Plastic Deformation in Electrodeposited Copper Films
A tensile stress developed in polycrystalline copper films during room-temperature aging was computed using a diffusion equation for excess vacancies migrating to the grain boundaries. This theory is based on an assumption that a free volume created by the arrival of excess vacancies at the grain boundaries of thin co…
Fabrication of Anodic Aluminum Oxide Film on Large-Area Glass Substrate
Fabrication of anodic aluminum oxide (AAO) on 4 in. glass substrate was demonstrated. Using unique structure with quadruple contacts as electrode support during anodization, we reported gradual transformation from opaque aluminum to transparent AAO over the entire substrate. In contrast, partial transformation was obs…
Magnetic and Magnetotransport Properties in Nanogranular Co/C<SUB>60</SUB>-Co Film with High Magnetoresistance
Magnetic properties were investigated for the alternately deposited film of C60 and Co which has found to exhibit tunnel magnetoresistance (MR) of 10–80%. Magnetic field and temperature dependences of magnetization showed typical superparamagnetic behaviors with the blocking temperature of 40 K. The magnetization curv…
Use of Chemical Dosimetry for Comparison of Ultrasound and Ionizing Radiation Effects on Cavitation
A comparison of the effects of ultrasound produced by low- and high-frequency ultrasonic apparatuses upon biological systems is one of the basic problems when studying ultrasound cavitation effects. One possibility for how to compare these effects is the indirect method which uses well-known physical quantities charac…
The role of power quality in electrical treeing of epoxy resin
The impact of power network changes on one ageing mechanism in one simple insulation system is considered. The effects of non-power frequency events on electrical treeing in epoxy resins are critically reviewed. These non-power frequency events include 3rd, 5thand 7thodd harmonics and various impulses superposed upon…
Bis(di-2-pyridyl-methanediol)copper(ii) dihydrogentrifluoride: a structural and spectroscopic study of the H2F3– anion in a complex salt
The H(2)F(3)(-) anion in mononuclear [Cu(dpd)(2)][(H(2)F(3))(2)] (dpd = di-2-pyridyl-methanediol) exists as a HF(2)(-)/HF adduct as evidenced by infrared spectroscopy and X-ray crystallography.