Materials Literature
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Nanotechnology has been shown as an important tool for developing intelligent devices. In particular, magnetic nanoparticles have been studied due their applications in cancer treatments. However, nanoparticles need to be tightly controlled in relation to size, shape and coating. It makes particles suitable for in viv…
The single crystals of langbeinite-related K2BiZr(PO4)3 have been obtained for the first time by spontaneous crystallization method from K-Zr-P-O-F molten system. The compound crystallizes in a space group P213 with cell parameter a = 10.30360 Å. The framework is built up from isolated Bi/ZrO6 octahedra connected toge…
The nanoparticles of (Na, CO3)- and (K, CO3)-containing Calcium phosphates have been prepared by a wet precipitation method in aqueous media. The influence of nature of alkaline metal and of samples composition on particles size and peculiars of their thermal transformation have been studied using such physical-chemic…
Three lanthanide-vanadium porphyrins, [ LnV ( TPPS ) H 2 O ]n ( Ln = Tb (1), Dy (2), Er (3); H 6 TPPS = tetra(4-sulfonatophenyl)porphyrin), have been prepared from hydrothermal reactions and their structures were characterized by single crystal X-ray diffraction technique. The macrocyclic ring of H 6 TPPS is coplanar…
By recent progress in electrically suppressed helix (ESH) ferroelectric liquid crystal (FLC) mode, a novel pixel design employing pulse width modulated (PWM) grayscale scheme, focusing on TFT flat panel display applications is proposed. Such design has a 3T1C structure, which is compact enough to preserve reasonable p…
Increasing power densities of power electronics with reduced volume requires increased efforts in cooling as little surface and material are available for thermal conduction. A systematic comparison of the thermal resistance of a wide selection of thermal interface materials (TIMs) ranging from solid Al2O3to elastomer…
The effect of organic modified montmorillonite (OMMT) on the ablative property, fire retardancy, thermal stability and charring capability of the ethylene propylene diene rubber (EPDM) composite was studied. Experimental data show that 33% decrease in the linear ablation rate of EPDM composite was obtained at a loadin…
The electronic structure of salicylideneaniline (SA) and some of its derivatives are investigated both experimentally and theoretically. The equilibrium geometric structures of the studied compounds are determined at the B3LYP/6-311++G** level of theory. A set of 12 substituted SA derivatives is considered in the pres…
The quality of ultrafast active cavitation imaging (UACI) using plane wave transmission is hindered by low transmission pressure, which is necessary to prevent bubble destruction. In this study, a UACI method that combined wavelet transform with pulse inversion (PI) was proposed to enhance the contrast between the cav…
Weft knitted structures are aff ected by various forms of dimensional distortion. Inclination and distortion of loops within knitted structures are commonly known as skewness and spirality, respectfuly. Causes of skewness and spirality have been thoroughly investigated, analyzed and classifi ed. They can basically be…
The surface chemistry of the commercial active carbon AG-5 has been modifi ed by oxidation with concentrated nitric acid. The structural changes caused by oxidative treatment were estimated on the basis of nitrogen adsorption-desorption isotherms and thermal analysis. Boehm titration method and infrared spectral analy…
Measurement of Partial Discharge (PD) in High Voltage (HV) power apparatus has become an emerging issue. It helps to provide prior warning before sudden failure of the apparatus. The measurement of PD in HV power apparatus and in any electrical systems helps to reduce the down time including saving of money. For large…
Abstract Copper sulfide-selenide (CuS0.2Se0.8) thin films were deposited on FTO coated glass substrate (fluorine doped tin oxide) and stainless steel substrates using electrodeposition technique. Deposited thin films were characterized using different characterization techniques viz. X-ray diffraction (XRD), scanning…
Ultraviolet (UV) and X-ray photoelectron spectroscopy and quantum chemistry methods (DFT) are used to study tris -β-diketonates of the rare-earth metals europium and lutetium. New information is obtained on the electronic structure of the complexes. The geometric and electronic structures of the compounds are calculat…
Interaction of polyphenylsiloxane with magnesium acetylacetonate in boiling toluene has been studied. The products isolated via extraction and fractional precipitation have been characterized with elemental analysis, IR spectroscopy, X-ray diffraction analysis, and thermal analysis. The reaction products are polymers…
The effects of N substitution on the magnetic properties of Mn 3 InC 1−x N x (0.0 ≤ x ≤ 0.7) are investigated systematically. Partial substitution of N for C leads to the monotonic reduction in both the Curie temperature T C and saturated magnetization M S . The final results obtained from thermo-magnetic curves demon…
The variation in the strengthening during uniform and nonuniform deformation is determined for structural steels in different states. In addition, the structure formation in tensile-fracture surfaces is studied. Theoretical analysis shows that the change in these parameters is related to the power of the stress concen…
Substitution rare-earth elements for cadmium in the monoclinic compounds Ln2MoO6 (Ln – Gd, Ho) leads to the formation of fluorite-related cubic structure. Series Ln2xCdxMoO6x/2 was investigated by XRD (with structure refinement), scanning electron microscopy, FTIR-spectroscopy and conductivity measurements.
The mechanism of the formation of in-situ ultra thin silicon nitride (SiNx) layer (< 2 nm) on amorphous silicon (a-Si) layer has been studied by Fourier transform infra-red spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The ultra-thin SiNx layers have been obtained through a hot-wire chemical vapor de…
Aganosma dichotoma (Roth) K. Schum. is an indigenous plant of Bangladesh. Traditional healers use this plant to treat many diseases. In order to systematically explore the medicinal values of this plant, the crude methanol extract of leaves of A. dichotoma were screened for analgesic and antidiarrheal activities in mi…