Materials Literature
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Radiation defects in β-irradiated Li6Gd(BO3)3:Eu3+ single crystals have been studied by means of thermally stimulated luminescence, radioluminescence, photoluminescence, optical absorption and thermal annealing methods. Parameters of traps have been determined. Models of radiation defects have been proposed. (© 2005 W…
The angular dependence of the intensity of CK α radiation measured from a film of oriented carbon nanotubes shows an increase in the yield of x-ray fluorescence along the growth direction of the nanotubes. The angular distribution of the intensity of scattered x rays is close in magnitude to the angular distribution o…
The development of low cost hierarchical porous materials based upon the zeolitisation of diatomaceous earth for fluid waste benification is described. Two preparative approaches invole: first, using the diatom as a support for zeolite nanocrystals; second, direct pseudomorphic transformation of the diatom into a zeol…
A combination of DFT calculations and magnetic studies allow structural features of di- and tetra-nuclear nickel pivalate cage complexes to be deduced.
Abstract The structure and thermal behavior of new types of bacterial copolyester, poly(3‐hydroxybutyrate‐ co ‐3‐hydroxyhexanoate); P(HB‐ co ‐HHx) (HHx=2.5, 3.4, and 12 mol %) have been explored by means of wide‐angle x‐ray diffraction (WAXD), differential scanning calorimetry (DSC), and infrared (IR) spectroscopy. Th…
Abstract A theoretical investigation on the structure, stability, and aromaticity of M‐subphthalocyanine (MSubPc; MB, Al, and Ga) was performed at the B3LYP/6‐31+G*//B3LYP/6‐31G* level. The comparison between MSubPc and the corresponding Mphthalocyanine (MPc) was considered. The geometry optimization of the MSub…
Temperature- and pH-sensitive amphiphilic polymer poly(N-isopropylacrylamide-co-acrylic acid-co-cholesteryl acrylate) (P(NIPAAm-co-AA-co-CHA)) has been synthesized and employed to encapsulate paclitaxel, a highly hydrophobic anticancer drug, in core-shell nanoparticles fabricated by a membrane dialysis method. The nan…
SMA (shape memory alloy) actuators have found a wide range of applications due to their unique properties such as high force, long stroke, small size, light weight, and silent operation, etc. However, their strong nonlinear properties make them a challenge to achieve accurate actuation. This paper presents a simple co…
Reaction of 1-propylamino-4-acetato-1,4,7-triazacyclononane (L1), 1-benzyl-4-acetato-1,4,7-triazacyclononane (L2) and 1-benzyl-4-propylamino-1,4,7-triazacyclononane (L3) with a copper(II) salt gave Na2[CuL1](ClO4)3(1a), [CuL2]Cl (2) and [Cu2L32](ClO4)4.5H2O (3), respectively. [CuL4]ClO4 (4) was formed by reacting 1-fo…
The influcence of addition of 10B and 11B on radiation hardening as a function of irradiation temperature was examined in reduced-activation martensitic F82H+B steels (8Cr-2W-0.2V-0.04Ta-0.1C-0.006B). Specimens used were 10B doped, 10B+11B doped and 11B doped F82H steels. Helium concentration produced in the specimens…
Ferromagnetic shape memory alloys, exhibiting large recoverable strain and rapid frequency response, appear to be promising shape memory actuator material. These materials exhibit large shape memory effect associating with martensitic transformation, and magnetic-field-induced strain in the martensite state. The recen…
Plasma etch rate (ER) measurements (via in situ spectroscopic ellipsometry) of thin PMMA (poly methyl-methacrylate) films, in an inductively coupled plasma (ICP) reactor are presented. It is shown that plasma ER decreases as the initial polymeric thickness decreases, indicating an increased plasma etch resistance of t…
Manganese porphyrin catalysts were tethered to polymer-supports via peptide linkers. The reactivity and chemoselectivity of the catalysts were assessed in the epoxidation of limonene. It was found that the inclusion of a peptide linker incorporating a donor heteroatom which could act as an axial ligand led to a suppor…
A new methodology utilizing a redox-triggered activation for the facile release of dendrimer end groups is reported.
Organic crystals grown from solution are known to exhibit multiple morphology as well as habits which are of great importance to the end-use property of the product such as the bioavailability and the downstream processing such as in filtration and drying. The crystal morphology can also dictate other quality measures…
We have synthesized the first early transition metal N-confused porphyrin complex Mo(NCTPP)(pip)2; this species is isostructural to its normal porphyrin analog Mo(TPP)(pip)2 but exhibits significant electronic differences arising from the inversion of a single pyrrolic group.
Two new low cost β titanium alloys, Ti–4.3Fe–7.1Cr (TFC alloy) and Ti–4.3Fe–7.1Cr–3.0Al (TFCA alloy) for healthcare and medical applications have been recently developed. As for such applications, the alloys are necessary to have high fatigue performance. The aim of this study is, therefore, to investigate fatigue cha…
Mesoporous silicates are prepared by templating on the hexagonal (H1) mesophase of surfactant bipyridine complexes of ruthenium(II) using a true liquid-crystal templating approach. On calcination, the surfactant template is removed except for the central metal ion that is oxidised, forming nanoparticles of RuO2 that d…
Abstract Oligo(naphthalene-2,3-diyl)s are synthesized by the palladium-catalyzed cross-coupling reactions of 2-naphthylzinc compounds with 2-bromonaphthalene derivatives. An NMR analysis together with an X-ray diffraction study supports the conjecture that the helical secondary structure is a common feature of the ass…
Reduced Activation (RA) martensitic steels of the 9/11CrWVTa type are promising candidates for fusion reactor applications as long as they exhibit good mechanical properties—similar to those of commercial martensitic steels of the 9/12CrMo(NbV) type—and satisfy design criteria related to the behavior under irradiation…