Materials Literature
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Atomic structures of Ge(25)Sb(15)S(60) and Ge(35)Sb(5)S(60) glasses are investigated in the gamma-irradiated and annealed after gamma-irradiation states by means of high-energy synchrotron x-ray diffraction technique. The first sharp diffraction peak (FSDP) is detected at around 1.1 A(-1) in the structure factors of b…
The Seebeck coefficient, electrical resistivity, thermal conductivity, and Hall effect for the cubic phases ${M}_{3}{\text{Ni}}_{3}{\text{Sb}}_{4}$ ($M=\text{Zr}$ or Hf) have been measured. These materials were synthesized by induction melting of the constituent elements with subsequent annealing. Powder x-ray diffrac…
‘Dass ich erkenne, was die Welt im Innersten zusammenhält’ (that I should recognize what holds the world together at its core) – when Goethe published his ‘Faust’, he was inspired by the most recent ‘transdisciplinary’ scientific discovery at that time, the synthesis of Urea; an organic substance from inorganic source…
A method that enables reproducible synthesis of low aspect ratio, monodispersed and stable silver nanoparticle suspensions, uniform in its optical response and tunable over a range of diameters has been developed. The uniformity of the nanoparticles has been accurately determined using electron and atomic force micros…
Nitrous oxide decomposition on iron-exchanged zeolites (Fe-FER, Fe-ZSM-5, Fe-BEA, and Fe-FAU) has been studied both theoretically, by using the ONIOM (B3LYP/6-31G(d,p):UFF) method, and experimentally, by temperature programmed reaction, to determine the effect of different zeolitic nanostructured pore networks on the…
Solid-state Fourier transform infrared spectroscopy (FTIR), evolved gas analysis-FTIR (EGA-FTIR), thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC) have been used to investigate the desorption of nitric acid from boehmite and from gibbsite. Samples containing between 3 and 36% of adsorbed…
By degrading S-adenosyl-L-homocysteine, which is a byproduct of S-adenosyl-L-methionine-dependent methylation reactions, S-adenosyl-L-homocysteine hydrolase (SAHase) acts as a regulator of cellular methylation processes. S-Adenosyl-L-homocysteine hydrolase from the leguminose plant yellow lupin (Lupinus luteus), LlSAH…
The superconducting transition temperature of the high-Tc SmO1-xFxFeAs superconductors increases monotonically as the F-doping level x increases to 0.20. High-pressure magnetization experiments reveal a strong sensitivity of Tc to interatomic distances in the underdoped regime (x </= 0.12) with the pressure coefficien…
Natural weathering has been applied to investigate the properties of recycled newspaper (RNP)-filled polypropylene (PP)/natural rubber (NR) composites. Three sizes of RNP (11 mm, 23 mm, and 53 mm) were used in this study. These composites were subjected to natural weathering conditions; i.e, tropical climate in Penang…
Purpose The purpose of this paper is to investigate the effects of inorganic inhibitors on the corrosion rate of aluminum alloy using the electrochemical noise (EN) analysis and electrochemical impedance spectroscopy (EIS) techniques. Design/methodology/approach EN and EIS measurements were employed to study the corro…
Immobilization of catalysts on solid supports is a promising approach to combine the advantages of heterogeneous and homogeneous catalysts. Pd(PPh3)2Cl2, known as an extremely active homogeneous catalyst for the Sonogashira coupling reaction, has been immobilized on high-surface-area MCF (mesocellular foams)–type meso…
We have used atomic force microscopy to study the morphology of hydrophobic polyelectrolytes adsorbed on surfaces. The polyelectrolytes consisted of polystyrene sulfonate (PSS) chains made with three charge densities: 32%, 67%, and 92%. They were adsorbed on two types of surfaces: mica, and phospholipid bilayers made…
The objective of the study was to develop a high-throughput electrochemical impedance spectroscopy (HT-EIS) method for rapid and quantitative evaluation of corrosion protective coatings. A 12-element, spatially addressable electrochemical platform was designed, fabricated, and validated. This platform was interfaced t…
BACKGROUND: Nanoparticles are increasingly being incorporated into the design of diagnostic imaging agents. Significant research efforts have been conducted with one class of lipid nanoparticle (liposomes) radiolabeled with gamma-emitting radionuclides as radiopharmaceuticals for scintigraphic imaging of cancer, infla…
Novel bolaamphilic triblock molecules consisting of a bent 2,5-diphenylthiophene unit, two terminal glycerol units, and a lateral n -alkyl chain have been synthesized via Ni- and Pd-catalyzed coupling reactions as key steps. The thermotropic liquid crystalline behavior of these compounds was investigated by polarized…
Poly(vinyl alcohol) (PVA)/layered double hydroxide (LDH) nanocomposites were synthesized with different compositions: 0, 2, 4, 6, and 8 wt% of LDH by the solution intercalation method. The effects of the layered double hydroxide platelet concentration on the properties of the PVA/LDH films were investigated by thermog…
The linear and second-order nonlinear susceptibilities of the urea crystal have been evaluated by applying the supermolecule approach. Calculations performed at the time-dependent Hartree-Fock (TDHF) level using the Austin model (AM1) semiempirical Hamiltonian have first demonstrated the almost additive character of t…
The temperature-dependent nucleation and growth mechanism of electrodeposited zinc oxide (ZnO) thin films on fluorine-doped tin-oxide-coated (10–20 Ω cm −2 ) glass substrates from an acetate solution was studied by using the chronoamperometry technique. The morphological, compositional and structural properties were s…
Homogeneous inorganic core−shell microspheres made from hexagonal CuS are synthesized via thermolysis of Cu(R 2 dtc) 2 (R = octyl, dtc = dithiocarbamate) precursor at 130−180 °C under N 2 flow, optimally at 180 °C for 0.5 h. Scanning electron microscopy (SEM) analyses indicate that the core−shell microspheres have an…
Base-promoted self-condensation reactions of trans-stilbene and diphenylacetylene monomers bearing 4-alkylamino and 4'-methoxycarbonyl groups were investigated. Reactions of N-propyl monomers under pseudohigh-dilution conditions (a THF solution of monomer was added dropwise to a THF solution of LiHMDS) afforded the co…