Materials Literature
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LiCoPO 4 (T N ≈ 21.8 K) & LiMnPO 4 (T N ≈ 34 K) are antiferromagnetic insulators exhibiting large magnetoelectric effects. We performed inelastic neutron scattering (INS) experiments to investigate the spin dynamics of these systems and analyzed the measured magnetic spectra by linear spin-wave theory, taking into acc…
We report on photoluminescence (PL) properties of Er3+ doped Ga10Ge25S65 glass. Experiments were performed using 5 ns laser pulses at 980 nm (532 nm), in resonance with the I415/2→I411/2 (I415/2→H211/2) transition of the Er3+ ions. PL bands were observed from the blue to the near-infrared and the dependence of their i…
The aim of this work was to investigate the influence of microstructural features on the soft magnetic properties. The materials chosen for this work were two types of the Epstein strips of commercially produced non-oriented electrical steels by U.S. Steel Koice. The AC magnetic properties in 0.2-100 Hz frequency rang…
This study presents thermal degradation and burning behaviour of cellulose based and cellulose-silk blended upholstery fabrics treated with phosphorus (chemical A) and halogen (chemical B) based flame retardant (FR) chemicals. Char content increased substantially in all samples after treatments. Calculated activation…
TiO 2 nano powders with Mn concentration of 0 at%-12 at% were synthesized by the sol—gel process, and were annealed at 500 °C and 800 °C in air for 2 hrs. X-ray diffraction (XRD) measurements indicate that the Mn-TiO 2 nano powders with Mn concentration of 1 at% and 2 at% annealed at 500 and 800 °C are of pure anatase…
In this paper we describe the design, the fabrication and the properties of tunable MEMS Fabry-Pérot (FP) filters for the long-wave infrared range (LWIR). Based on a mid-wave IR (MWIR) device, completely new optical and electro mechanical designs have to be used to extend the spectral range to the LWIR. A new set of o…
Abstract We investigate the sliding friction of HUVEC monolayers cultured on PNaSS gel, intending to elucidate the role of glycocalyx on the surface of ECs in friction reduction. Three sets of HUVEC monolayers are investigated: an as‐cultured HUVEC monolayer; a HUVEC monolayer treated with TGF‐β1, which increases the…
Boron carbide nanoparticles and nanoflakes represent nano-building blocks for complex hierarchical assembly of nanoscale structures that exhibit ideal mechanical robustness. These nano-building blocks were synthesized by simply changing the mixing ratio of the solid precursors to influence the saturation condition of…
Singlet excitation transfer in self-assembled dyads formed via axial coordination of imidazole appended free-base tetraphenylporphyrin, H2PIm , to either a magnesium phthalocyanine, MgPc , or a magnesium naphthalocyanine, MgNc is investigated in non-coordinating solvents using spectroscopic (optical and mass), electro…
The structures of three phases of the synthesized europium potassium silicate were determined by X-ray diffraction. Two of these phases crystallize in a new structural type. The chemical formulas of the phases were determined. The orthorhombic unit-cell parameters of all three phases are equal: a = 14.852(1) Å, b = 15…
The primary aim of this communication is to introduce a novel approach of preparation of solar cell, viz. PS based solar cell, which is on the basis of the basic principle of the well established photovoltaic effect. We carefully investigate the current-voltage characteristics of the PS-based solar cell by virtue of p…
New acetamide and carbamide complexes LnI 3 · 4Ur · 4H 2 O (Ln = La, Eu, Dy, Ho, Y; Ur is carbamide) and LnI 3 · 4AA · 4H 2 O (Ln = Nd, Eu, Dy, Ho, Y; AA is acetamide) are synthesized. The complexes are characterized by the data of chemical analysis, IR spectroscopy, and X-ray diffraction analysis. The ligands (water,…
Single crystal film of Tb 3 Al 5 O 12 :Mn, with concentration of Mn approximately equal to 0.07 at%, has been grown by liquid phase epitaxy on Y 3 Al 5 O 12 substrate. We have measured the absorption, luminescence, luminescence excitation spectra and luminescence kinetics of the film. To analyze the energetic structur…
Optical and structural properties of n-ZnO films grown on a p-Si (111) substrate by atomic layer deposition were observed using in situ synchrotron x-ray diffraction during annealing. The photoluminescence showed a complicated photon response with increasing annealing temperature. In situ x-ray diffraction indicated t…
We report a self-associated silver (Ag) nanoparticle host-twisted intramolecular charge transfer (TICT) probe guest system where the latter gets attached to the surface of 20 nm Ag nanoparticles through mutual interaction with the lone pair of electrons on the N-atom of its donor group (-N(CH 3 ) 2 ). The TICT emissio…
Multicomponent silicate glasses are ubiquitous in modern society as evidenced by their inclusion in applications ranging from building materials and microelectronics to biomedical implants. Of particular interest in this study is the interface between multicomponent silicate glasses and adhesive polymers. These polyme…
OBJECTIVES AND METHODS: Searching for potent plant larvicides, crude aqueous extract of the latex of Uschar (Calotropis procera) and Labakh (Ficus benghalensis) were tested against the fourth instar larvae of the lymphatic filariasis vector Culex quinquefasciatus (Diptera: Culicidae) using the conventional methods rec…
Abstract In this work, multi-phase field and molecular dynamics simulations have been used to investigate nanoscale grain growth mechanisms. Based on experimental observations, the combination of grain boundary expansion and vacancy diffusion has been considered in the multi-phase field model. The atomistic mechanism…
Carbon-encapsulated metal nanoparticles were synthesized by thermal treatment of wood char, with or without transition metal ions pre-impregnated, at 900°C to 1,100°C. Nanoparticles with concentric multilayer shells were observed. The nanoparticles were analyzed by scanning electron microscopy, transmission electron m…
The inhibition of silver corrosion in dilute nitric acid (0.01 M) was studied using electrochemical polarization technique in the presence of different concentrations of methylamine, ethylamine, n-propylamine, and n-butylamine. It was found that the inhibition efficiency obtained from Tafel plots improved when the inh…