Journal of Modern Materials
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Welcome to Journal of Modern Materials: A New Open Access Journal for International Exchange of Scientific Research
No full textoai:ojs2.journals.aijr.org:article/29I am inviting you to submit your original research articles to the Journal of Modern Materials and hope that with time Journal of Modern Materials will become a premier publication for materials research worldwide. This goal can be achieved with the cooperation of our editorial team, reviewers, and authors to publish such a high-quality original research that attracts attention. We warmly welcome authors to submit their research papers in the inaugural issue of this journal that is truly international in the scope which aims to publish manuscripts from all over the world
Laser Irradiation Effect on the Optical Band Gap of Se96-xTe4Hgx Thin Films
No full textThe effect of laser irradiation on the optical band gap of Se96-xTe4Hgx thin films has been studied. Thin films of thickness 300 nm have been deposited on glass substrate by using thermal evaporation technique. The result shows that irradiation causes a red shift in the absorption edge and hence optical band gap decreases with increasing irradiation time. The results have been analyzed on the basis of laser irradiation-induced defects in the film. Furthermore, optical band gap has found to decrease by increasing mercury concentration and optical band gap decreases rapidly with a higher concentration of mercury
Spinning Process of Chitosan Fiber with Low Concentration of Formic Acid Solution and its Characteristics
No full textThe wet spinning of chitosan fiber was carried out using 7% chitosan concentration, 4% aqueous formic acid as a solvent for chitosan and 6M of aqueous CaCl2.2H2O as a coagulation system. A better method for preparation of chitosan spinning solution was investigated by studying the effect of reaction time on incubation of spinning solution in open air. The shear viscosity of chitosan solution (22.63 ~ 23.09 Pa.s) was found to be stabilize the spinning of chitosan fiber in this study. The characteristics of different chitosan fibers were determined by FT-IR and 1HNMR spectroscopies, XRD diffraction, scanning electron microscopy and mechanical properties. All the fibers were observed with high tenacity (dTex). The strength of fiber and water retention of chitosan fiber (%) was significantly increased with increasing the incubation time of spinning solution in open air
Synthesis, Degradation, Biocompatibility and Drug Release Studies of Bis 2-Hydroxy Ethyl Terephthalate-based Poly (Mannitol-Citric-Sebacate) Ester
No full textBis 2-Hydroxy Ethyl Terephthalate-based biodegradable poly(mannitol-citric-sebacate) has been synthesized by catalyst-free melt condensation process using two different diacids and Bis 2-Hydroxy Ethyl Terephthalate with D-mannitol as monomers having a potential to be metabolized in vivo. The biocompatibility of the polymer, Bis 2-Hydroxy Ethyl Terephthalate-poly(mannitol-citric-sebacate) has been tested using human primary stromal cells. In vitro degradation of Bis 2-Hydroxy Ethyl Terephthalate-poly(mannitol-citric-sebacate) polymer in Phosphate Buffered Saline solution carried out at physiological conditions indicates that the degradation goes to completion after 23 days. The usage of Bis 2-Hydroxy Ethyl Terephthalate-poly(mannitol-citric-sebacate) polymer as a drug carrier has been analyzed by doping the polymer with Doxorubicin model drug and the release rate has been studied by mass loss over time. The cumulative drug-release profiles exhibit a biphasic release with an initial burst release and cumulative 100 percent release within 14 days
Synthesis and Structural Investigation of Nano-Sized Cadmium Ferrite
No full textThis report presents the synthesis of cadmium ferrite (CdFe2O4) by Oxalate co-precipitation and its subsequent characterization by using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) techniques. XRD results confirm the single cubic spinel phase formation with lattice parameter 8.7561Ao. An infrared spectroscopy study shows the presence of main two absorption bands indicating the presence of tetrahedral and octahedral group complexes, respectively, within the spinel lattice. We also report strain (y), hopping length (LA and LB) and dislocation density (rD) of ferrite sample
Variations in Optical Properties of ZnS/Cu/ZnS Nanostructures Due to Thickness Change of ZnS Cap Layer
No full textNanostructures of ZnS/Cu/ZnS were deposited on glass substrate using physical vapor deposition technique. The thickness of the first and last ZnS layers was altered, while the thickness of the embedded Cu layer was fixed at 50 nm. The produced nanostructures were of good quality. Spectrophotometric measurements were carried out on the nanostructures to investigate the optical properties. The transmission and reflectivity spectra were recorded and studied in detail. ZnS was selected due to its high refractive index, ease of deposition, and low cost. The copper layer was used because of its low absorption in the visible part of the spectrum and its thermal stability. The ZnS layer was found not only to anti-reflective the Cu layer, but also to stabilize the nanostructure, improve its adherence on glass substrate, and increase the film thermal resistance up to 240 °C. Furthermore, all the samples exhibit good thermal stability up to 240 °C upon annealing for two hours
Peer Review; Critical Process of a Scholarly Publication
No full textThe quality of an article is a critical parameter for the success of any scholarly journal, and the Journal of Modern Materials (JMM) is no exception. Peer review process presents a barrier prior to publication which acts as a quality control filter in science. Typically, the journal editor assigns submitted paper to two or more qualified peers – recognized experts in the relevant field. The reviewers will then submit detailed criticism of the paper along with a recommendation to reject, accept with major revisions, accept with minor revisions, or accept as it is. The quality and consistency of peer review will be the key success for the Journal of Modern Materials
Carbon Nanotube Structure Vibration Based on Non-local Elasticity
No full textThis manuscript investigates the bending vibration dynamic of a single walled carbon nanotube (SWCNT) based on the theory of non-local elasticity. Fundamental natural frequencies and mode shapes of the SWCNT are computed by using a semi-analytical procedure called differential quadrature method (DQM), which gives accurate results in reference with the exact solution
Studies in Silicone-Polyether Ketone Blend Based High Performance Coating
No full textSilicone polymer although have some exceptional superior properties have limitations when it is exposed to harsh chemicals. Poly Ether Ketone (PEK), a high-performance polymer is well known for its resistance towards acid, alkali and many solvents. PEK exhibits good environmental protection with better thermal stability. In the present study, the coatings were prepared using varying ratios of silicone and Poly Ether Ketone (PEK) to study the effect of concentration of PEK on mechanical, chemical, thermal and performance properties. The clear coatings of Silicone/PEK cured films were characterized for TGA, FTIR and evaluated for thermal resistance, corrosion resistance, resistance to 10% acid, alkali, sodium chloride, detergent solution and humidity resistance. The coating films were found to be stable up to 450 °C as indicated by TGA analysis. It is seen that the performance of silicone / PEK coating films increases with increasing concentration of PEK
Complex Permeability Measurements in a Nanocrystalline Toroidal Core
No full textIn the design of power electronic converters, the choice of the suitable magnetic alloys and the measurement of the variations of their magnetic properties versus the temperature are fundamental issues. A theoretical model based on Neel theory that takes into account wall displacement and coherent rotation is elaborated to derive the expression of the complex permeability versus the frequency. The static and the dynamic behaviour has been considered in this model. The dependence of temperature is implicit in this model, i.e. the parameters involved in the expression of the complex permeability may depend on the temperature. An impedance analyser has been used to measure the open circuit and short circuit complex impedances of a toroidal core versus the frequency at several temperatures ranging from 20°C to 180°C. The complex permeability of the material is then deduced. Finally, the theoretical model is used to identify the domain susceptibility and the anisotropy energy of the materials. The effect of temperature on these parameters is analyzed. The results obtained are valuable for the design of power electronic converters from the magnetic and thermal viewpoints, which prove the need for the combination of heat transfer and magnetic mechanisms at the design