Materials Literature
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The spatial structure of aggregates formed by detonation nanodiamonds is investigated using the wide-angle and small-angle X-ray scattering techniques. The effective sizes of crystallites and the crystallite size distribution function are determined. The shape of scattering aggregates is restored from the small-angle…
A novel approach to fabricate highly graphitic carbon nanostructures such as carbon nanotubes (CNTs), metal/graphitic-shell nanocrystals and hollow carbon nanospheres (HCNSs) in a very short time is demonstrated.
Sialon glasses are effectively alumino-silicates containing modifying cations (Mg, Ca, Y and Lanthanides) in which nitrogen substitutes for oxygen in the glass network. They are found at triple point junctions and as intergranular films in silicon nitride based ceramics. This paper provides an overview of M-Si-Al-O-N…
Recently, we described a new synthesis of C,D-ring symmetric chlorins 11, involving 2 + 2 condensation of bis-formyl-dihydrodipyrrins 9 with symmetrically substituted dipyrromethane diacids 10 (Method I). However, while versatile in many aspects, Method I was unsuited to the broader goal of synthesizing fully non-symm…
Abstract Of prime importance in reactions involving insoluble cellulosic fibers is the sorption of reagents, which is governed by their degrees of accessibility in substrates. Swelling treatments of cellulosics in alkali solutions alter substrate accessibility leading to changes in their reactivity. In this paper, the…
Photoluminescence Properties of Ba3MgSi2O8 : Eu2 + Blue Phosphor and Ba3MgSi2O8 : Eu2 + , Mn2 + Blue-Red Phosphor under Near-Ultraviolet-Light Excitation, Umetsu, Yousuke, Okamoto, Shinji, Yamamoto, Hajime
Mixed-conducting , 7, 10, liquid-channel grain-boundary structures were studied with respect to their electrochemical properties. The electrical conductivity and oxygen-ion transference number, measured by the four-probe dc and volumetric measurements of the faradaic efficiency techniques in the temperature range of ,…
This review describes investigations into the localized surface plasmon resonance (LSPR) of silver nanoparticles from both experimental and theoretical perspectives. It is divided into two parts: 1) LSPR of silver nanoparticle arrays and its interaction with resonant adsorbates and 2) single-nanoparticle LSPR spectros…
Three homochiral layered complexes, [Cu3(R-chea)2(N3)6]n (1), [Cu3(S-chea)2(N3)6]n (2) (chea = 1-cyclohexylethylamine) and [Cu3(S-phpa)2(N3)6]n (3) (phpa = 1-phenylpropylamine), and three novel cluster-based coordination polymers, [Cu6(1,2-pn)4(N3)12]n (4) (1,2-pn = 1,2-diaminopropane), [[Cu8(en)4(N3)16] x H2O]n (5) (…
A gadolinium-doped ceria (GDC)/scandia-stabilized zirconia (ScSZ) bilayer electrolyte on a microtubular (LSM) support was prepared via extrusion of a microtubular cathode support and subsequent surface coatings with electrolyte and anode slurries. The GDC/ScSZ bilayer electrolyte was obtained on the LSM support using…
A novel series of second-order NLO chromophores containing pyrrole as an auxiliary electron donor was synthesized via Knoevenagel reactions between 5-aminated N-methylpyrrole-2-carbaldehydes and different electron-accepting groups, i.e., malononitrile, picolinium tosylate and 2-dicyanomethylene-3-cyano-4,5,5-trimethyl…
In this study Ag+ adsorption on Na+-rich montmorillonite (MMT) type Wyoming was studied. Adsorption data were fitted with several common isotherms but the best regression parameters were obtained for Langmuir model. It indicates that Ag+ was adsorbed on the MMT surface forming a monolayer. By adsorption of small amoun…
The performance of solid oxide cells (SOCs) is highly dependent on triple phase boundaries (TPBs). Therefore, detailed TPB characterization is crucial for their further development. We demonstrate that it is possible to prepare a thick transmission electron microscopy (TEM) lamella of the interface between the dense c…
Using additives is one of more recent and special methods to obtain a desirable polymorph. However, for pharmaceuticals, additives are usually limited to structurally related organic compounds. In this study, we have shown the potential of using a salt additive to induce crystallization of the metastable polymorph V o…
Polypropylene/high-density polyethylene (PP/HDPE) blends and their nanocomposites are melt compounded using twin-screw extruder. The as-extruded samples are then batch foamed with supercritical carbon dioxide. It is demonstrated that the blend with a viscosity ratio close to unity produces a microcellular foam with ve…
Transdermal route is an evolving panorama in novel drug deliverance and with oral route they proffer immense potential. Most recently there is hastening in approaches for delivering bioactives via these routes, amongst them revolution has been made by dendrimers. Encapsulation and conjugation of bioactives with these…
Lamellar structures of alternating sheets of crystalline V2O5 (shcherbinaite) and cations from certain imidazolium-based ionic liquids (IL) (e.g. 1-ethyl-3-methyl-imidazolium tetrafluoroborate) were obtained starting from VOCl3. Surprisingly, growth along the [100] direction of shcherbinaite is suppressed due to the i…
Thermodynamic calculations of three binary Ti-based alloys: Ti-Al, Ti-Fe, and Al-Fe, as well as ternary alloy Ti-Al-Fe, is shown in this paper. Thermodynamic calculations involved thermodynamic determination of activities, coefficient of activities, partial and integral values for enthalpies and Gibbs energies of mixi…
The jellium sphere model of a volume of electrons, counterbalanced by a positive charge throughout the sphere, leads to an energy level sequence corresponding to special stabilities of bare post-transition element clusters with 20 valence electrons such as the known P4 and clusters with 40 valence electrons such as th…
Dy3+-doped selenide glasses and their optical fibers in the Ge-Ga-Sb-Se glass-forming system were fabricated and their mid infrared (MIR) emission (2.5-5 μm) characteristics were analyzed. Optimum concentration for 3 μm emission band was determined as 0.02 mol% due to cross relaxation between Dy3+ ions. Sensitizers su…