Materials Literature
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Transmission electron microscopy (TEM) analyses of the defects formed in epitaxial SrRuO3 films on SrTiO3 (001) substrates are reported. With preparing three different forms of TEM specimens, i.e. plan-view, cross-sectional and free-standing specimens, various TEM techniques were implemented with placing emphasis on t…
Comparison was made for the citrate stabilized gold colloids prepared sonochemically and thermally. In the sonochemical reduction system, purge gas had large influence on the formation of gold nanoparticles, while little effect was observed for the thermal reduction system. The average diameter of sonochemically prepa…
EPR Study of Paramagnetic Defects in Clay Minerals Radiation induced defects (RID-s) and transition metal ion impurities were revealed by EPR (Electron Paramagnetic Resonance) spectroscopy in kaolinites from a number of Polish deposits. Arelationship between the intensity of the EPR signals of the RID-s and quantity o…
A nanocomposite material based on polyfluorene (PF) loaded with a carbon black, namely Ketjen Black (KB), was investigated electrochemically as a cathode material for high-energy electrochemical capacitors. The nanocomposite was prepared by a chemical oxidation of fluorene monomer dissolved in the KB suspension. From…
Patterned films of multiwall carbon nanotubes (MWCNTs) were fabricated by the “wet” deposition of MWCNT dispersion on a patterned substrate. Films in the form of stripes or lattices of micrometer dimensions and variable thickness were obtained. The films were uniform and adhered strongly to the substrates. Field-emiss…
The thermal oxidation of fine aluminum (Al) powders in carbon dioxide (CO2) gas was investigated for the purpose of metal-based propulsion fuel development. The thermal behavior and reaction energy was studied using simultaneous thermogravimetric (TG) analysis and differential scanning calorimetry (DSC). The reactivit…
Studies of amorphous (a‐) semiconductors have been driven by technological advances as well as fundamental theories. Observation of electrical switching, for example, fueled early interest in a‐chalcogenides. More recently a‐chalcogenide switching has been applied quite successfully to DVD technology where the quest f…
Nanocrystalline ZnO of various shapes was obtained without the use of catalysts by dry oxidation of Zn. Scanning Electron Microscopy results showed that the oxidation of zinc single crystals at temperatures below the melting point of Zn lead to the formation of a zinc oxide layer of flakes‐type structure covering the…
Antimicrobial (AM) packaging is one of the most promising active packaging systems. Increase demand in food safety, quality, convenience and environmental concerns associated with the handling of plastic waste has emphasized the importance in developing biodegradable and edible films from natural polymers, such as sta…
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When producing thermomechanical pulps (TMP), wood chips and fiber material are loaded mechanically in a disc-refiner to separate the fibers and to make them flexible. In the process, much of the energy supplied is transferred to the fiber material through cyclic compression, shear and friction processes. Therefore, co…
The corrosion morphologies of aged magnesium alloy AZ80 were investigated by immersion corrosion tests, scanning electron microscopy (SEM), electrochemical measurement. The T5 heat treatment was carried out in a vacuum furnace, holding for 16 h at 177℃, and then cooling in air. The results showed intergranular corrosi…
Mg-8Li-3Al-xY(x=0.5,1.0,3.0)alloys were prepared with vacuum induction melting method.Effect of yttrium content on microstructure and mechanical properties of the alloys was studied.Results show that,yttrium causes the α(Mg) phase refinement and spheroidization.And Al2Y phase exists in alloy.The tensile strength incre…
The process concept of separation system of high-level radioactive liquid waste (HLLW) using an octylphenyl-N,N-diisobutylcarbomoyl phosphine oxide impregnated silica adsorbent (CMPO-adsorbent) was designed for separation of Cs and Sr. The process consists of two separation steps. Each step is composed of three CMPO-a…
Understanding the P-sorption characteristics of floodplain soils is important for successful fertilizer management practices. The P-sorption characteristics of 16 soils that are representatives of the recent floodplain areas of the Punjab were described using Langmuir and Freundlich isotherm equations. The phosphate s…
Crude copper phthalocyanine (Cupc) was synthesized by Wyler process, then grounded using various methods such as acid pasting, kneader, attritor and SC-mill. Particle size, shape and crystalline structure were compared and evaluated after particle size reductions. Cupcs prepared by acid pasting and kneader methods tha…
In this paper, we report a novel technological approach for three dimensional (3D) assembly of single-walled carbon nanotubes (SWNTs) using dielectrophoresis (DEP). The two terminal resistance of the assembled SWNTs is ˜ 545 Ohms. Encapsulation of the 3D structure with a thin layer of parylene-C protects it from the e…
This paper presents a new recognition method for ultra-high-frequency (UHF) signal radiated by partial discharge (PD) occurred in transformers, based on wavelet transform and fractal theory. Wavelet transform provides an effective way to decompose a signal on unlimited scales. During this process, the wavelet coeffici…
The two polymorphic forms (α and β) of the racemate of the title chiral nitroxide radical were separately obtained by changing the composition ratio of the recrystallization solvent (hexane/Et 2 O).Both polymorphs existed as a racemic compound; the thermally less stable α-form was monoclinic (space group, C2/c), and t…
Kuramoto et al. calculated the activation energy for dislocation loop migration by integrating the force–distance curve. Their method has a great potential for the determination of migration energy in many cases. However, the validity of the application of their method to point defect migration has not yet been proved…