Materials Literature
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Carbon nanotubes (CNTs) decorated with platinum (Pt) nanoparticles (NPs) have been characterized using a cold field-emission scanning electron microscope (SEM) and a high resolution field-emission transmission electron microscope (TEM). With this particular composite material, the complementary nature of the two instr…
Single crystal cerium doped yttrium aluminum garnet boules were grown by the Czochralski method. Cerium concentrations were held at 1.0 at. % (with respect to yttrium in an on stoichiometric charge) but melt stoichiometry ranged from 10.0 at. % yttria rich to 10.0 at. % alumina rich in 5.0% increments. Photo-luminesce…
Pyruvate kinase (PK) is a highly regulated enzyme that catalyzes the final step of glycolysis. PK from the hyperthermophilic archaeon Pyrobaculum aerophilum (PaPK) is distinguished from most PK enzymes of eukarya and bacteria by not responding to any known allosteric effectors and apparently exhibiting only cooperativ…
A thermally irreversible dithienylethene (DTE) photochrom can be turned into a thermally reversible one in presence of Cu(II) triflate. A ring opening (DTEC closed→DTEO open) occurs through the formation of a copper-containing fast transient intermediate. Stopped-flow experiments monitored at 410 and 780 nm have allow…
The self-assembly of condensable amphiphile molecules in water is an attractive approach for the synthesis of mesostructured hybrid materials. In this article, we focus on aminoundecyltriethoxysilane (AUT), a condensable "bola-amphiphile", i.e., an amphiphilic molecule possessing two polar heads on both sides of an al…
Tests were conducted to measure the impact forces generated by cylindrical projectiles striking a relatively rigid target. Two types of projectiles were used, solid clear and lower density fabricated ice. Three forms of solid clear were tested: single crystal, poly-crystal, and rejected poly-crystal (poly-crystal in w…
The photoluminescence response of semiconductor CdSe/ZnS quantum dots embedded in a borosilicate porous glass matrix to exposure to ammonia vapor is investigated. The formation of surface complexes on the quantum dots results in quenching of the photoluminescence and a shortening of the luminescence decay time. The pr…
We investigate the effect of grating design on surface enhanced Raman scattering (SERS) intensity using patterned nanoporous gold (P-NPG) films. The SERS response is systematically engineered by tuning the parameters of gratings imprinted on the nanoporous gold films, including grating period, duty cycle, and height.…
The electrical, electronic and optical properties of multilayer graphene (MLG) films have been investigated systematically using a 4-point probe method, ultraviolet photoelectron spectroscopy, and ultraviolet/visible spectrometer. Monolayer graphene and MLG (2, 3, 4 and 5 layers) films were prepared on glass and SiO2…
Two novel tetrahedral silicon‐centered cyano functionalized silanes, namely bis(4‐cyanophenylethynyl)dimethylsilane ( CN-1 ) and bis(4‐cyanophenylethynyl) diphenylsilane ( CN-2 ), have been synthesized and well characterized. They demonstrated unusual aggregation‐induced emission enhancement (AIEE) properties in the H…
The superconductivity of Ca 1− x La x Fe 2 As 2 single crystals with various doping levels was investigated via electromagnetic measurements for out-plane ( H ∥ c ) and in-plane ( H ∥ a b ) magnetic field directions. Obvious double superconducting transitions, which can survive in magnetic fields up to several tesla,…
Zinc oxide nanomaterials have sought considerable biomedical applications. The varying grain sizes of zinc oxide nanoparticles (ZnO NPs) were prepared by wet chemical precipitation method. Particle size and morphology of the as-prepared ZnO powders were characterized by X-ray diffraction (XRD), Fourier transform infra…
Manganese steel (Hadfield) is one of the important<br> alloys in industry due to its special properties. High work hardening<br> ability with appropriate toughness and ductility are the properties that<br> caused this alloy to be used in wear resistance parts and in high<br> strength condition. Heat treatment is the m…
Morphology control of gold nanocrystals was successfully carried out via a modified polyol process using bovine serum albumin (BSA) as a surface regulating biopolymer. By combining a small amount of AgNO 3 as an additive, BSA yielded regular Au octahedrons, cubes, and higher polygons owing to the underpotential deposi…
We investigated the design method of an infrared (IR)/microwave (MW) micromirror array type of beam combiner. The size of micromirror is in microscopic levels and comparable to MW wavelengths, so that the MW will not react in these dimensions, whereas the much shorter optical wavelengths will be reflected by them. Hen…
The effect of the transition metal valence electron concentration on the energy of formation, effective charge of B icosahedra, elastic properties, surface energy and fracture toughness was calculated using density functional theory for icosahedral transition metal borides of AlXB14 (X=Sc, Ti, V, Cr, Y, Zr, Nb, Mo). C…
PVA/PAA/PEG/PVP nanofibers with HPMC and aloe vera were fabricated by electrospinning method. HPMC was added to the hybrid polymer solution as the water retention agent and aloe vera which are known over centuries were also added to the system to promote the healing of wounded or infected skin. The fabricated nanofibe…
DxnB2 and BphD are meta-cleavage product (MCP) hydrolases that catalyze C-C bond hydrolysis of the biphenyl metabolite 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acid (HOPDA). BphD is a bottleneck in the bacterial degradation of polychlorinated biphenyls (PCBs) by the Bph catabolic pathway due in part to inhibition by 3…
For the first time SiC/C composite foams were prepared from concentrated emulsions by carbothermal reduction of biosourced precursors combining sodium silicate by lignin at 1400 °C. The composition of the materials was determined by XRD, FTIR and Raman analyses. Their porous structure was characterized by SEM, mercury…
Flexoelectricity is an increasingly popular subject because it can be extremely large in thin films and permits switching of devices in nonpolar (non-piezoelectric) crystals via application of inhomogeneous stresses. However, recent work has been limited to macroscopic measurement of voltage or strain. Here, we discus…