Materials Literature
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The condensation reaction of hydroxyporphyrin with the surface silanol groups on silicate glass proceeded in the solid state. Kinetics of the reaction was analyzed by two parallel first order reactions, i.e., a double exponential equation. Introduction of long alkyl chains to hydroxyporphyrin accelerated the condensat…
Polarized and unpolarized neutron diffraction techniques have been applied to study the temperature-dependent magnetic and structural properties of four 200 nm-thick Fe50Pt50−x Rh x films with x = 5, x = 10, x = 17.5 and x = 25. Similar to the bulk system, an antiferromagnetic to ferromagnetic transition can be found…
NANOPARTICLES History Richard Feynman, the Nobel-prize winning theoretical physicist, is often credited with conceptualizing the future field of nanotechnology in his lecture at the American Physical Society meeting at the California Institute of Technology in 1959: “There's plenty of room at the bottom.” According to…
An auxiliary device for rotating alfalfa in air flow with waste air recycling was designed in this study. The motion characteristics of rotating alfalfa in air flow and the new crafts of herbage drying for drying homogeneity were studied. An aerodynamic model of alfalfa segments was established based on the result of…
In this paper, we propose an ultrathin zoom lens system based on liquid lenses. The proposed system consists of an annular folded lens and three electrowetting liquid lenses. The annular folded lens has several concentric surfaces. The annular folded lens is used to get the main power and correct aberrations. The thre…
Super-resolution focusing in the metamaterials for both the propagating and evanescent wave emerging from free space is demonstrated based on the gradient-index (GRIN) metalenses. The theoretical investigation reveals that the evanescent wave in free space can be transformed into propagating wave in the metamaterial d…
Reducing the scale of etched nanostructures below the 10 nm range eventually will require an atomic scale understanding of the entire fabrication process being used in order to maintain exquisite control over both feature size and feature density. Here, we demonstrate a method for tracking atomically resolved and cont…
La recuperacion de compuestos de alto valor agregado provenientes de desechos de la industria marina es un area de investigacion prometedora. El biso del mejillon es un sub-producto de la produccion de mejillones el cual es una potencial fuente de colageno. El objetivo de este estudio fue extraer colageno desde el bis…
Polymerization of vinyl chloride monomer with continuous initiator dosage at constant temperature was modeled. Initiators with a half‐life shorter than 0.4 hour at the reaction temperature are suitable for continuous injection. Using a suitable initiator dosage regime, it is possible to keep the reaction rate at its m…
This paper reported a high-power diode-pumped solid-state laser for material processing applications with a target of more than 60 ns pulse width at 355 nm. As known, long pulse width IR laser (around 70-100 ns) is difficult to get high conversion efficiency to UV since the peak power is more than 2 times lower than 2…
Abstract The cadmium(II) complexes [CdL1(m‐nba)2] (1), [CdL1(p‐nba)2]·C2H5OH (2), [CdL2(p‐nba)2]·CH3OH (3), and [CdL2(p‐nbat)2] (4) containing the ligands L1 and L2 [L1 = 2,6‐bis(benzimidazol‐2‐yl)pyridine, L2 = bis(2‐benzimidazolylmethyl)amine] were synthesized and characterized (m‐nba, p‐nba, and p‐nbat are the anio…
A three-tier rough superhydrophobic surface was fabricated by growing hydrophobic modified (fluorinated silane) zinc oxide (ZnO)/copper oxide (CuO) hetero-hierarchical structures on silicon (Si) micro-pillar arrays. Compared with the other three control samples with a less rough tier, the three-tier surface exhibits t…
Abstract Hybrid nanocomposites based on magnetic nanoparticles dispersed in liquid crystalline elastomers are fascinating emerging materials. Their expected strong magneto‐elastic coupling may open new applications as actuators, magnetic switches, and for reversible storage of magnetic information. We report here the…
Abstract Si3N4/nano-carbon black (CB) composite ceramics with boron nitride (BN) as interphase were fabricated by gelcasting. The results of scanning electron microscopy (SEM) and X-ray diffraction (XRD) showed that the structures of BN interphase and BN coated CB were formed and were uniform distributed in the Si3N4…
Deep‐ultraviolet lithography is essential for the mass production of silicon devices. To date, restrictions in the process have prevented the realisation of high‐ Q ‐factor optical resonators. This reported work demonstrates photonic crystal cavities with Q ‐factor values of ∼200 000 using an optimised design.
Chlorosilanes are used abundantly at high temperatures in the production of ultra-pure silicon and silicon containing materials. The presence of both chlorine and silicon presents a unique corrosion environment for the metallic materials that must handle these compounds. It is known that in chlorosilane environments,…
The singly charged, parent anions of three transition metal, tetraphenyl porphyrins, M(TPP) [Fe(TPP), Mn(TPP), and Ni(TPP)], were studied by negative ion photoelectron spectroscopy. The observed (vertical) transitions from the ground state anions of these porphyrins to the various electronic states of their neutral co…
The effects of the weak interactions of rare gas atoms on the UV-visible absorption spectra of gold dimer and tetramer clusters are investigated. The time-dependent density functional theory based on the two-component relativistic zeroth-order regular approximation that considered spin-orbit coupling is performed to e…
Higher working temperatures improve the energy conversion efficiency in gas turbine engines, so thermal barrier coatings (TBC) are applied to protect the blades to increase the operating temperature. However, CaO-MgO-Al2O3-SiO2 (CMAS) from volcanic ash and other debris can lead to corrosion of the coating. Rare earth…
Abstract The carbon content of mesostructured organic‐inorganic hybrid material of a cylindrical block copolymer template of poly(2‐vinylpyridine)‐block‐poly(allyl methacrylate) (P2VP‐b‐PAMA) and ammonium paramolybdate (APM) could be reduced by thermal depolymerization. By calcination in vacuo at 320 °C the PAMA core…