Materials Literature
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The electronic structure of the model alumina-chromium catalyst CrO x /Al2O3 for isobutane isomerization was investigated using the method of steady-state photoluminescence (PL). The chromium content varied in the investigated samples from 0.1 to 11.0 wt % in terms of Cr2O3. The luminescence and luminescence excitatio…
This paper represents results of a Raman spectroscopy study of gamma-irradiated few-layer graphene thin films at three different doses: 25, 50 and 110 kGy. Graphene thin films were deposited by the vacuum filtration method and then transferred onto glass substrate. Raman spectroscopy and atomic force microscopy analys…
Alkylation of ethyl 4-(2,5-dimethylthiophen-3-yl)-3-oxobutanoate with 2-aryl-4-bromoacetyl-5-methyl-1,3-oxazole followed by decar-boxylation–cyclization of the intermediate diketo ester affords the title photochromic compounds. Relationship between the fluorescent characteristics, thermal stability of photoinduced for…
Abstract A practical synthetic approach for poly(2-methoxyaniline-5-phosphonic acid) was developed. The improved method for the monomer synthesis was appropriate for scale-up in view of the yield, purification, and cost compared to the previous method. Polymerization was also performed in a gram scale.
Colloidal nanosilica is currently being produced by various methods which are mainly high energy intensive and/or not environmentally friendly. It is therefore essential to develop new energy-efficient and environmentally friendly technologies. This paper introduces a new ultrasound assisted route based on alkali leac…
Ultraviolet protection factor (UPF) of woven fabrics is modeled by using two soft computing approaches, namely adaptive network based fuzzy inference system (ANFIS) and artificial neural network (ANN). Three fabric parameters: proportion of polyester in weft yarns, weft count, and pick density are used as input parame…
La2/3Sr1/3MnO3 films with uniaxial magnetic anisotropy were coherently grown on NdGaO3 (110) substrates. The uniaxial anisotropy has strong effect on magnetoresistance (MR). A positive MR was observed when the current is along magnetic easy axis under the current-field perpendicular geometry. In contrast, no positive…
The relaxation dynamics of thin water layers confined between hydrophilic surfaces was analyzed through shear relaxation measurement at room temperature. With the well-characterized shear motion of atomic force microscopy (AFM) probe with subnanometer amplitude, the viscoelastic response of water confined between hydr…
This paper presents the results of mechanical and electrical tests carried out to assess the condition of XLPE and EPR low-voltage cables installed in nuclear power plants. Cable samples underwent accelerated aging under simultaneous thermal and gamma-radiation stresses. In order to obtain significant results in a rea…
High quality sub-monolayer, monolayer, and bilayer graphene were grown on Ru(0001). For the sub-monolayer graphene, the size of graphene islands with zigzag edges can be controlled by the dose of ethylene exposure. By increasing the dose of ethylene to 100 Langmuir at a high substrate temperature (800 °C), high qualit…
In the present study two quinoline-thiazole derivatives namely, {4-[1-aza-2-(phenyl)vinyl]-3-phenyl-2- thioxo(1,3-thiazoline-5-yl)}-N-[1-aza-2-(2-chloro(3-quinolyl))vinyl] (Inh I) and {4-[1-aza-2-(4- methoxyphenyl)vinyl]-3-phenyl-2-thioxo(1,3-thiazoline-5-yl)}-N-[1-aza-2-(2 chloro (3-quinolyl))vinyl] (Inh II) were syn…
Calotropis procera is a small, erect plant, which is used in several traditional medicines to treat many diseases. It is a native of most of the Asian and African countries. All plant parts exude thick white milky juice (latex) on cut or break. This shrub has been known to possess analgesic, antitumor, antihelmintic,…
Forming an ordered surface layer is possible together with the formation of Janus nanoparticles in the chemical modification of the surface of silver colloids. This is achieved via sorption of nanoparticles on the surface of chemically modified silica grafted with amine, followed by sequential treatment with modifier…
In this work, we have studied the nanostructure, the crystallographic texture, and the crystal lattice of the martensite of the Ti-50.26 at % Ni alloy subjected to a thermomechanical treatment, which includes cold rolling, warm (at 150°C) rolling, intermediate and post-deformation annealings (at 400°C) in different co…
The electronic-spectroscopy technique is used to study the properties of solutions of double-decker diphthalocyanine complexes of lanthanides LnPc 2 (Ln = Ho, Er, Yb, Lu) in chloroform, dimethylformamide, water-micellar systems, solutions of proteins, and polymers, as well as on the surface of silica nanoparticles. In…
We have investigated the transport and magnetic properties of group-IV ferromagnetic semiconductor Ge1-xFex films (x = 1.0 and 2.3%) with and without boron doping grown by molecular beam epitaxy (MBE). In order to accurately measure the transport properties of 100-nm-thick Ge1-xFex films, (001)-oriented silicon-on-ins…
A novel torsion apparatus for micro-scale specimens is developed based on electromagnetism, in which a coil-magnet component is used for actuating and torque measuring. When the current gets through the coil, the torque, produced by Ampere force, can be easily measured by recording the current. A laser displacement se…
Aggregation of magnesium octa-[(4′-benzo-15-crown-5)oxy]phthalocyaninate (Mgcr 8 Pc) in solutions of biocompatible anionic surfactant, sodium deoxycholate (SDC), was studied. It was shown using the electron absorption spectra that formation of Mgcr 8 Pc monomers in micellar solutions of SDC is affected by both increas…
The effect of benzyl triphenyl phosphonium chloride (BTPPC) and halide ion (KI) on the corrosion of mild steel in a solution of 0.3 M phosphoric acid have been investigated at various inhibitor concentrations and temperatures by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), temperature ki…
Heat conduction in single-walled carbon nanotubes (SWCNTs) has been investigated by using various methods, while less work has been focused on multi-walled carbon nanotubes (MWCNTs). The thermal conductivities of the double-walled carbon nanotubes (DWCNTs) with two different temperature control methods are studied by…