Materials Literature
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Nano particles of Copper oxide and Poly(3,4-ethylenedioxythiophene)-Copper oxide nanocomposite were prepared by chemical oxidation method. The formed metal oxide nanoparticle and polymer metal oxide nanocomposites were characterized by UV–VIS, XRD, SEM and EIS studies. The UV-VIS studies of nanoparticles and nanocompo…
This paper studies the echo-contrast properties of an alumina nanopowder suspension using ultrasonography (US) fully corresponding in its characteristics to the techniques of medical ultrasound diagnostics of organs and tissues. The purpose of this study was to search for the possible effect of the ionic and protein c…
For the first time this study reported the success of using nanocrystalline hexagonal close-packed (hcp) nickel (Ni) modified composite graphite (CG) electrode (hcp-nano Ni/CG) for the electrocatalytic oxidation of glycerol in alkaline medium (0.1 M KOH). The hcp-nano Ni/CG electrode had an improve response and specif…
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Poplar wood flour was spray treated with two preservative materials, (Thiabendazole or Carbamate derivatives (IPBC) with concentration of 0.9%) and then the wood/polyethylene composite samples with the composition of 60% wood, 38% polyethylene and 2% coupling agent were manufactured. The treated composite and control…
A nomographic method for predicting the detonation velocity of a porous explosive mixture prepared from RDX powder and water is proposed. It is shown that, in contrast to the existing calculation methods for predicting the detonation velocity, the use of the proposed nomogram greatly simplifies the procedure and requi…
Strontium substituted lead zirconate titanate nanocrystalline material with chemical formula Pb0.95Sr0.05 (Zr0.52Ti0.48) O3 have been synthesized by alkoxide based sol gel method. The product was characterized by differential thermal analysis, thermogravimetric analysis, powder X-ray diffraction and scanning electron…
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Thesis (MSc)--Stellenbosch University, 2013.
Abstract : Our results have shown that the transverse thermopower of the four-terminal junction with a central scatterer is very sensitive to the symmetry of the four QPC transmissions functions. We have shown that as a first order conceptual model, the four-terminal junction can be thought of as two pairs of QPCs, on…
In the low-temperature (4.2 K) excitonic light reflection spectra of CdSe crystals subjected to the low-energy (several keV) electron irradiation, an effect of the stop of a “rotation” at the longitudinal exciton frequency is found. The connection of this effect with Fermi level pinning on the surface of the semicondu…
The regularities of the adsorption modification of different solid surfaces with aqueous solutions of amino-acid derivatives of fullerene C 60 (ADF) that contain the maleimide and dipeptide addends were studied by the methods of wetting and Quartz Crystal Microbalance (QCM). It was found that, despite the absence of s…
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Flexural strength, modulus and tensile strength of composites made from treated baggase flour/recycled polyethylene was investigated. Baggase flour (40 mesh particles) was treated with 10% hydroxide sodium for 45 minutes. Then, the composites were manufactured using injection molding method using both treated and virg…
Morphological analysis and electrical conductivity of composites obtained by melt-processing of blends of a polyaniline complex (PANICX) with styrene-butadiene-styrene (SBS) are reported. Blends with PANICX contents ranging from 1 to 50 wt% were first prepared using a two-piece batch mixer, followed by ram-extrusion t…
In order to develop the ‘Bio-filter’, Si3N4 porous bodies with micro-macro complex pore structure were fabricated. The micro-pores were successfully introduced by inserting PE meshes between the green tapes. Micro-pore size was controlled by adding a small amount of the β-Si3N4 ‘seed’ particles to the α-Si3N4 raw powd…
The perovskite-like compound Dy x Cu3V4O12 (x = 0.67–0.75) is synthesized under high pressure (P = 4.0–9.0 GPa) and temperature (T = 1000°C). Its crystal structure is determined (Im-3 space group, Z = 2, a = 7.29348(7) Å) by means of powder X-ray diffraction. The basic lengths and bond angles are defined. It is found…
Tests were conducted to investigate the inhibiting effect on steel bars in concrete contaminated with 0.75% (wt.) chloride of the cementitious materials by adding inhibitor in green concrete or surface painting inhabitor on cover concrete. The results show that the anticorrosion effect of surface painting inhibitor on…
Abstract : Many microelectromechanical systems (MEMS) use metal contact micro-switches as part of their reconfigurable device design. These devices utilize a mechanical component that can wear down and fail over time. Metal insulator transition (MIT) materials, also known as phase change materials (PCMs), exhibit a re…
Fermented tapioca prepared at different temperature was prepared and used as a starting material in CNTs synthesis using 2-system thermal chemical vapor deposition (TCVD) method. The CNTs was deposited on nickel coated silicon where the nickel acts as catalyst in the growth process. The size of CNTs growth is dependen…