Materials Literature
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Electrical transport properties of the nanocrystalline Er3N@C80 with fcc crystal structure were characterized by measuring both temperature-dependent d.c. conductance and a.c. impedance. The results showed that the Er3N@C80 sample has characteristics of n-type semiconductor and an electron affinity larger than work fu…
The effects of functional groups and structures at the surface of biomaterials on protein adsorption were examined using direct interaction force measurements. Three kinds of surface structures were evaluated: polymer brushes, self-assembled monolayers with low molecular weight compounds, and surfaces with conventiona…
The possibility of using a scanning differential heterodyne microscope for characterization of V-shaped plasmon waveguides is demonstrated. To characterize a waveguide profile, a specific algorithm based on solution of the inverse problem is proposed. The microscope response library at various waveguide parameters is…
In thepresent study, preparation and characterization of LM6 (A413) aluminum alloy reinforced with nanoalumina powder (Al2O3) is investigated. Al2O3 nanopowder reinforced LM6 (A413) aluminum alloy Metal Matrix nanoComposites (MMNCs) were prepared by stir casting method. The distribution of reinforcement of alumina nan…
The pseudo-tetrahedral complexes [CuL2]PF6·7H2O·CH3OH (1) and [AgL2]CF3SO3·H2O (2) (L = 3,3′-bis(2-benzimidazolyl)-2,2′-bipyridine) have been synthesized and characterized through crystal structure analyses, electrochemistry, and spectroscopic methods. X-ray structural analyses of 1 and 2 indicate that sterically cons…
The main objective of this study was to evaluate the wound healing activity of Tribulus Terrestris Linn. (TT) fruits in swiss albino rats. The fruit body of Tribulus Terrestris rich in tannins and phenolic content. Dried fruits of Tribulus Terrestris powder were used for ointment preparation. Healthy adult swiss albin…
This paper presents the mechanical and machinability properties of aluminium 6061 alloy reinforced with boron carbide composite is compared with the addition of graphite particles with AlB4C. The composites were fabricated by stir casting process. The experimental results showed that the hardness of the composite incr…
The reflectivity of ultrasharp periodic groove arrays in a gold surface is studied for a general direction of light incidence. This includes the case of incident light propagating along the grooves. Two efficient numerical modeling approaches are presented, namely, a simple and approximate stack matrix method (SMM), w…
In polymers, the rotation of a small solute is nonexponential. Either heterogeneity in the local friction or local anisotropy-a homogeneous process-may be responsible. A new, two-dimensional anisotropy experiment is demonstrated on this problem. In poly(dimethylsiloxane), the rotation of individual solute molecules is…
In this study, atmospheric pressure glow discharge plasma was used to modify the surface properties of wool/polyamide fabric, the effect of air plasma treatment on the printing properties of wool/polyamide blend was also discussed. Three dyes were used namely acid dye, basic dye, and reactive dye. Different exposure t…
This review discusses the photoluminescence (PL) characteristics of halosulfate phosphors developed by us. Halosulfate phosphors KCaSO4 Cl:X,Y (X = Eu or Ce; Y = Dy or Mn) and Na6 (SO4 )2 FCl (doped with Dy, Ce or Eu) were prepared using a solid-state diffusion method. The mechanism of energy transfer from Eu(2+) →Dy(…
We address the dependence of the relative photocurrent quantum yield (QY) on the excitation energy and the exciton binding energy of semiconducting single-walled carbon nanotubes (s-SWNTs) having well-defined chiral indexes, by analyzing both the optical absorption and the photocurrent spectra. First, we examine the Q…
To realize an ultra‐flat diamond surface with a three‐dimensional (3D) structure, we performed dressed‐photon–phonon (DPP) etching. A DPP is generated on nano‐scale protrusions. Hence, the generation of DPPs results in selective removal of nano‐scale protrusions, thereby achieving an ultra‐flat surface even on the sid…
Electromigration driven void motion is studied in Ag wires with an initially well-defined single crystal lattice by in situ scanning electron microscopy. Voids are moving in opposite direction to the electron flow. When the electron current is reversed, voids exactly retrace their previous motion path with an increase…
The accurate prediction of the properties of materials under nonstandard or extreme conditions, such as the high pressure of ocean depths and the near-absolute zero (0 K) temperatures of space, has become increasingly important. The ability to predict crystal polymorphs that are realized at a given pressure P and temp…
Solar-pumped lasers have attracted attention in the area of renewable energy creation. However, since the conversion efficiency from solar energy to laser energy is low, such lasers are not yet in practical use. In this work, we grew and evaluated Nd 3+ ,Cr 3+ -co-doped YVO 4 and CaYAlO 4 crystals for solar-pumped las…
An experimental programme for determination of the Johnson Cook material and failure model constants for a typical armour steel material is reported. Tensile tests on specimens made from the armour material have been conducted at quasi-static and dynamic strain rates and at ambient and elevated temperatures. The analy…
Effects of aluminum content on microstructure and corrosion behavior of as cast Fe-Al-C alloys lightweight steel have been studied. The alloys were prepared by an induction furnace under an argon atmosphere. Microstructure of Fe-Al-C alloys containing 1.24, 3.3, 5.5, 7.5, and 9.05 wt-% aluminum showed ferrite and pear…
K in vegetables of a recently found high background radiaƟ on area of south-eastern part of Bangladesh and to detect the radiological risks to human from intake of these vegetables. Materials and Method: 10 plant samples were collected randomly from different locaƟ ons of the study area. The radio-nuclides in papaya w…
The effect of amino multi-walled carbon nanotubes (MWCNTs) on the flexural properties of epoxy/ nanocomposites was studied. Sonication technique was employed for dispersion of amino MWCNTs in epoxy. The properties of both neat epoxy and nanocomposites extensively studied by using three point bend test and scanning ele…