Materials Literature
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In an effort to develop a Standard Reference Material (SRM™) for Seebeck coefficient, we have conducted a round-robin measurement survey of two candidate materials-undoped Bi2Te3 and Constantan (55 % Cu and 45 % Ni alloy). Measurements were performed in two rounds by twelve laboratories involved in active thermoelectr…
The temperature dependence of the crystal structures of the perovskites BaPrO3 and BaPr0.9Y0.1O3−δ has been determined between room temperature and 900 °C using time-of-flight neutron powder diffraction data. The orthorhombic room temperature structures evolve to a primitive cubic cellvia three changes of symmetry Pnm…
Responsive polymeric nanoparticles composed of hybrid block co-polymers were prepared from biocompatible components that displayed rapid, tunable and multiply reversible transitions in response to change of temperature.
Meso-alkylidenyl-thia(p-benzi)porphyrin and its ring expanded analog containing exocyclic C-C double bonds at meso-positions, undergo initial protonation at the exocyclic alkylidene alpha-carbon.
Porous polymeric microspheres with unique core-shell structures (similar to Kusudama--Japanese paper balls) have been fabricated via a new solid-in-oil-in-water (S/O/W) emulsion technique.
Scale formation is one of the most serious oil field problems that inflict water injection systems primarily when two incompatible waters are involved. Two waters are incompatible if they interact chemically and precipitate minerals when mixed. Due to the lack of reaction kinetics data, the rate of barium sulphate dep…
The magnetic hysteresis of a film consisting of a single magnetic domain is analyzed. A method of designing logical computer elements employing thin films is presented and illustrated. It is concluded that recently discovered films approaching single domain behavior offer two possible advantages in applications: 1) As…
This work describes the synthesis of new, environmentally friendly, robust and biocompatible organic–inorganic hybrid materials based on fatty acid methyl ester-functionalised silica. The hydrosilylation reaction was used to covalently anchor 10-undecenoic methyl ester to a cyclic and acyclic backbone based on methyls…
A novel test structure to study intrinsic reliability of barrier/low-k is proposed. The structure is based on a planar capacitor design where low-k film is deposited after the patterning of the capacitor, followed by metallization and Cu CMP. This so called low-k planar capacitor structure provides several unique capa…
A new surface modification that facilitates the grafting of poly(ethylene glycol) methacrylate (PEGMA) on a polyurethane (PU) surface was developed using a thiol-ene reaction. The thiolated PU surface for the grafting of PEGMA was created by fabricating allylated PU through an allophanate reaction, which was then modi…
The magnetic characteristic of magnetic steel sheets that are used for stator core of motors changes with stress. This change of magnetic characteristic affects the characteristic of the motors. For example, iron loss increases because of stress that acts on the stator core inserted in a frame by shrink fit. In this p…
In this work, the mechanical properties including tensile strength, flexural strength, impact strength and fracture toughness of the PLA/hemp composites were investigated over a range of fibre content (0-30 wt.%). It was observed that, the tensile strength and Young's modulus of the composites increased with increased…
A new family of six aromatic ring-containing bent-shaped mesogens in which the central elbow is a ketone, a secondary alcohol or a methylene group (6: CO, 7: CHOH, 8: CH2) is described. The effects of the variant elbow as well as the number of terminal alkoxy chains on the mesomorphic properties have been studied. The…
Stable silver colloids were prepared using polyethylene glycol (PEG) as an environment friendly reduction agent and stabilizer, and with H2O as solvent. The Ag colloids were characterized by UV/VIS spectroscopy, transmission electron microscopy (TEM), and atom force microscopy (AFM). TEM and AFM of the sample showed u…
Thermal expansion behavior in a stoichiometric AuCu alloy was investigated from the viewpoint of a phase transition. Thermal expansion measurements were conducted from room temperature to 873 K at various heating and cooling rates. The crystal structures and phase transitions were analyzed by X-ray diffractometry and…
The polytypes of monoclinic TlInS 2 ( c ∼ 15, 60, 120 Å) and triclinic TlInS 2 ( c ∼ 30 Å) were prepared. The positions of edge excitons and the band gaps were determined by the optical and photoelectric measurements. It was found that the maxima in the temperature dependences of dielectric constants of pure polytypes…
The luminescence properties of Mn4+-activated MAl12O19 (M = Ca, Sr, Ba) were studied. The Mn4+-activated MAl12O19 compounds were synthesized in an air atmosphere for oxidation from Mn2+ to Mn4+. Mn4+-activated CaAl12O19 and SrAl12O19 materials could be excited under the UV region but Mn4+-activated BaAl12O19 materials…
Two types of layered metal hydroxides (layered Mg/Al double hydroxides and cobalt hydroxides) have been grown on the surface of cation-exchanged polymer resin beads. SEM images of the Mg/Al double hydroxide that nucleated on the surface of the Mg2+/Al3+-exchanged resin beads show it to have an initial LDH shell of ca.…
A new and effective method has been developed where self-assembled gold nanoparticles (Au-NPs) of ∼10 nm diameter are successfully attached onto the surface of sidewalls and ends of thiol-terminated multi-walled carbon nanotubes (MWNTs) functionalized with orthomercaptoaniline, acting as a bridging agent. It can bridg…
The gas-phase molecular structure of a thiadiazole-containing expanded heteroazaporphyrinoid (C42H39N15S3) has been studied by a synchronous gas electron diffraction and mass spectrometric experiment and density functional theory calculations using the B3LYP hybrid method and cc-pVTZ basis sets. The molecule has an eq…