Materials Literature
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Due to the environmental issue, natural fibers are day by day becoming attractive to researchers. Natural fiber contains cellulose, hemicelluloses, lignin etc, which are hygroscopic in nature and biodegradable. The lack of surface feature diminishes its properties. So, the surface properties of the jute yarns need to…
Carbon nanotubes (CNTs) have been synthesized by ferrocene-catalyzed pyrolysis of toluene. The influences of the experimental conditions on the morphology and microstructure of the product have been analyzed. To find the proper temperature for synthesis of CNTs, the experiment was performed in a temperature range from…
Reactive ion etching was used to etch barium strontium titanate thin films in a CHF 3 /Ar plasma. BST surfaces before and after etching were analyzed by X-ray photoelectron spectroscopy to investigate the reaction ion etching mechanism, and chemical reactions had occurred between the F plasma and the Ba, Sr and Ti met…
Magnetic Cluster Expansion method is applied to the investigation of magnetic properties of Fe-Cr alloys treated as a function of Cr content, the spatial distribution of Cr atoms, and temperature. Random Fe-Cr alloys and Cr clusters formed in concentrated alloys are analyzed. We find significant differences between th…
A comparative study has been carried out of the composition and the reflection and luminescence spectra of yttrium aluminum garnet and sialons as promising photophosphors. It is shown that the phase composition and surface inhomogeneity of the sialon particles has no effect on the position of the dopant levels in the…
A simple process of fabricating micropillar structure and its influence upon enhancing electrochemical biosensor response were studied in this work. Conducting polymer PEDOT was used as a base material in formulating a composite with PVA. Micro porous PC membrane filter was used as a template for the micropillar of th…
Superelastic NiTi polycrystalline tubes, when subjected to quasi-static stretching, transform from an initial austenite phase to a high-strain martensite phase by the formation and growth of a macroscopic self-organized helical domain as deformation progresses. This paper performed an experimental study on the effects…
In this work, the results of studies on the preparation of carbon fibres (Tenax HTA40) for composites with an aluminium alloy matrix are presented. In the first step of preparation, the epoxy sizing was removed to assure adhesion of the Ni-P coating as a barrier to prevent the formation of brittle Al4C3. Removal of th…
The cell permeability and cytotoxic effects of different-sized zinc oxide (ZnO) particles were investigated using a human colorectal adenocarcinoma cell line called Caco-2. Morphological observation by scanning electron microscopy revealed that three zinc oxides with different mean particle sizes (ZnO-1, 20 ㎚; ZnO-2,…
Abstract A review is given on atomic vacancies in intermetallic compounds. The intermetallic compounds cover crystalline, quasicrystalline, and bulk metallic glass (BMG) structures. Vacancies can be specifically characterized by their positron lifetimes, by the coincident measurement of the Doppler broadening of the t…
Potential abilities of active optical elements based on liquid crystals are investigated. We consider liquid crystal cells in which a desired distribution of the liquid crystal director is achieved by a non-uniform electric field and by inhomogeneous boundary conditions. The optical elements built on principles of dif…
환경 문제가 대두 됨에 따라 세계 각국에서는 환경규제를 통해서 산업계에 친환경 제품의 개발을 독려하고 있어 생분해성 재료에 대한 산업계의 관심이 높아지고 있다. 생분해성 재료인 Polylactic acid(PLA)는 강성과 내화학성이 뛰어나지만 내열성과 내충격성이 낮아서 자동차용 재료로서 요구되는 성능을 만족시킬 수 없다. 이에 본 연구에서는 천연섬유(황마)를 강화재로 사용하여 PLA의 내열성과 내충격성을 향상 시키기 위한 실험을 수행하였다. 특히 PLA와 황마 계면 간의 결합력을 증가시키기 위해 다양한 표면처리를 수행하였고 내충격성이 향상됨을 확인하였다. 또, 어…
Solid solutions between $BaTiO_3$ and $LaFeO_3$ have been prepared through a solid state reaction method. The X-ray diffraction results reveal that $Ba_{1-x}La_xTi_{1-x}Fe_xO_3$ ( $0.1\;{\leq}\;x\;{\leq}\;0.7$ ) compounds have a cubic structure, whereas the parent material $BaTiO_3$ has a tetragonal structure. The mag…
The possibility of forming a TiN dispersed composite layer on steel was studied by preplacement of titanium powder on steel surface and melting under TIG (Tungsten inert gas) torch in a reactive environment. The surface melting of preplaced 1.8 mg/mm2 Ti powder was performed under TIG torch with energy inputs of 324,3…
Normal.dotm 0 0 1 124 709 Uni 5 1 870 12.0 0 false 18 pt 18 pt 0 0 false false false Polyethylene glycol 2000 (PEG) entrapped, bovine serum albumin (BSA) microspheres were prepared and optimized. These microspheres were then analyzed to understand the stealth effect to the microspheres imparted by incorporated polyeth…
The magnetostrictive material is magnetized in magnetic field and produces a nonuniform demagnetizing field inside and outside it. The demagnetization is decided by the permeability of magnetostrictive material and its size. The magnetoelectric performances are determined by the synthesis of the applied and demagnetiz…
With the rising cost of zinc reaching historic levels, more emphasis is being placed on technologies to increase the efficient utilization of zinc. One area targeted for increased efficiency is in-house recycling of metallic zinc industrial wastes. The largest consumer of zinc is the hot-dip galvanizing of steel. Larg…
Abstract The functionalization of single‐wall carbon nanotubes (SWCNTs) by attaching various molecules or molecular groups to the exterior walls or tips has attracted much attention, because it offers a possible way to modify their electronic, chemical, optical and mechanical properties. In this contribution the resul…
We analyze the problem of microwave absorption by the Heisenberg-Ising magnet in terms of shifted moments of the imaginary part of the dynamical susceptibility. When both the Zeeman field and the wave vector of the incident microwave are parallel to the anisotropy axis, the first four moments determine the shift of th…
Hybrid jute-carbon/ epoxy composites, fabricated by hand lay-up method with fiber volume fractions of 0.47, 0.58 and 0.68 were used to investigate water absorption behavior as a function of immersion time and fiber content. The effect of moisture content on impact strength and failure modes was also studied. Results s…