Materials Literature
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Here we report on the synthesis and characterisation of four new complexes of the [2×2] M4II grid-type (M = Co, Fe, Zn) with oligopyridine-derived ligands. The presence of aminopyrazine and aminopyrimidine moieties at the edge of the ligands potentially enables the formation of infinite hydrogen-bonded multi-grid netw…
We show that the structures of cubic Cd6Yb and Cd6Ca crystals are closely related to those of recently found stable icosahedral Cd-Yb and Cd-Ca alloys. These structures are described as a periodic packing of rhombohedra having different atomic decoration in terms of three-dimensional Penrose tiling. A new type of icos…
We report the first high resolution photoluminescence studies of isotopically pure Si (99.896% (28)Si). New information is obtained on isotopic effects on the indirect band gap energy, phonon energies, and phonon broadenings, which is in good agreement with calculations and previous results obtained in Ge and diamond.…
In this study we have investigated the magnetic and electrical transport properties of Zr doped lanthanum manganite perovskite. The structural, magnetic, and transport properties of the Zr doped compounds were determined using x-ray diffraction, dc magnetic susceptibility, and a four probe method for electrical resist…
A slight minimum in the zero-field resistivity of a single crystalline La0.8Sr0.2MnO3 and shallow one for ceramic La0.8Sr0.2MnO3 samples were observed at T∼4 K and at T∼25–30 K, respectively. The minimum for the ceramic shifts towards lower temperatures, flattens with increasing magnetic fields (H), and vanishes at so…
Chick cDNA clones for a new member of the FACIT (fibril-associated collagens with interrupted triple helices) subfamily have been isolated and sequenced. The collagen chain encoded by these cDNAs was assigned the next consecutive number, making it the alpha1(XX) collagen chain. Assignment of type XX collagen to the FA…
The first examples of an oriented periodic mesoporous organosilica (PMO) film, containing a variety of organic groups (ethane, ethene, benzene, thiophene) inside the channel walls, are reported. The mesostructure of the PMO film appears oriented with respect to the surface of the underlying glass substrate. Liquid-cry…
Results are given of an in situ X-ray diffraction study of the crystal-lattice state of a TiNi-based alloy during deformation under the effect of an external stress in the pretransition region preceding the B 2- R - B 19′ martensitic transformations. The pretransition state preceding martensitic transformations in the…
Get PDF Email Share Share with Facebook Tweet This Post on reddit Share with LinkedIn Add to CiteULike Add to Mendeley Add to BibSonomy Get Citation Copy Citation Text V. Yu. Zerov, V. G. Malyarov, I. A. Khrebtov, Yu. V. Kulikov, I. I. Shaganov, and A. D. Smirnov , "Uncooled membrane-type linear microbolometer array b…
The sensing properties of molecular composites, tetratertbutyl copper phthalocyanine (TBCPC) and polyoctadecyl thiophene (PODT), were investigated by optical and conductance measurements. A standard substrate for gas sensing was made, consisting of a set of eight interdigitated gold electrodes, 230 /spl mu/m wide and…
Microstructural attributes of steels affect hysteretic magnetic properties because the microstructure affects domain wall movement and pinning. Two important features are grain size and dislocation density. The consensus experimentally is that the coercivity tends to be linearly related to the inverse of the average g…
The coordination of flavins to Lewis-acidic zinc(II)cyclen complexes, as a mimic for a metalloprotein binding site, changes their redox properties significantly. The coordination facilitates the electrochemical reduction of the flavin and stabilizes the flavinhydroquinone redox stage, so that a 600 mV more positive po…
Abstract Intercalation of an ammonium amphiphile having an azobenzene chromophore, 4-dodecyloxy-4 ‘-(trimethylammoniopentyloxy)azobenzene and 4-(ω-trimethylammoniodecyloxy) -p’- (octyloxy)azobenzene bromide, into the layered silicate magadiite (ideal formula Na 2 Si 14 O 29· n H 2 O) was carried out by a conventional…
The conductivity measurements of 60WO3–40B2O3 and 40WO3–5Sb2O3–55TeO2 glasses have been carried out as a function of temperature. The results suggest that the conduction occurs by hopping of small polarons. Dielectric measurements of 60WO3–40B2O3 glass show that the temperature behavior could be described in terms of…
Two novel kinds of alcohol-soluble ladderlike poly(silsesquioxane)s containing side-chain hydroxy groups (OH-T1 and OH-T2) were prepared successfully for the first time by hydrolysis of ladderlike poly(silsesquioxane)s with side-chain ester groups (Ester-T1 and Ester-T2), which were synthesized by stepwise coupling po…
With the objective of obtaining slow-acting isoniazid derivatives, of potential use as chemoprophylactics or chemotherapeutics in tuberculosis, the micelle-forming copolymer of poly(ethylene glycol)-poly(aspartic acid) prodrug with isoniazid was synthesized. The derivative obtained was found to be active in Mycobacter…
We report on the cooperative photoluminescence (PL) properties of closely packed CdSe nanocrystal thin films and propose a model to elucidate the nonlinear PL behavior. The PL exhibits an initial decay and a subsequent enhancement under continuous excitation, which are attributed to the photodarkening and the effects…
Ternary lithium germanophosphate glasses have been synthesized over a wide range of compositions. Thermal and spectroscopic techniques (IR, Raman, and 31 P MAS NMR) have been used to investigate their properties and structures. It is found that modification occurs almost exclusively on the P 2 O 5 part of the structur…
Conductivity and magnetic susceptibility of disordered cubic titanium monoxide TiO y (0.920≤ y ≤1.262) are studied. Temperature dependences of the conductivity of TiO y monoxides with y ≤1.069 are described by the Bloch-Grüneisen function with Debye temperature 400–480 K, and temperature dependences of the susceptibil…
The present study investigated whether electrochemical impedance spectroscopy (EIS) could be used to monitor stress corrosion cracking (SCC). First, a model was developed that interpreted the impedance response of a cracked surface (i.e., the model could distinguish between a flat electrode surface and a surface with…