Materials Literature
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Hexagonally patterned porous titania is synthesized from a titanium isopropoxide precursor using a viscous surfactant template separating nanoscopic bicontinuous channels of water and isooctane. Subsequent salt reduction in the aqueous nanochannels decorates the pore surfaces with well-separated platinum (Pt) nanopart…
The interaction of progesterone with beta-cyclodextrin (beta-CD) was studied by differential pulse polarography. The aim of the present work was to study the effect of beta-CD on the electrochemical behavior of progesterone in aqueous solution and also to analyze the molecular interactions involved in formation of the…
We present spectacular evidence of metallization of amorphous Ge films under high pressure using optical micrographs and Raman-scattering and x-ray-absorption spectroscopies. This transformation is identified as a low-density amorphous (LDA) to high-density amorphous (HDA) transition, relevant to a large class of syst…
A microscopic explanation for the room temperature ferromagnetism in diluted ZnO:Co is at present rather elusive. Although standard secondary phases can usually be ruled out, it is less clear whether regions with high Co concentration coexist with undoped portions of the film, i.e., whether some form of CoO polymorph…
The photophysical properties of axial-bonding types (terpyridoxy)aluminum(III) porphyrin (Al(PTP)), bis(terpyridoxy)tin(IV) porphyrin (Sn(PTP) 2), and bis(terpyridoxy)phosphorus(V) porphyrin ([P(PTP) 2] (+)) are reported. Compared with their hydroxy analogues, the fluorescence quantum yields and singlet-state lifetime…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis and Properties of [2.2]Paracyclophane-Layered PolymersYasuhiro Morisaki*, Takuya Murakami, and Yoshiki Chujo*View Author Information Department of Polymer Chemistry, Graduate School of Engineering, Kyoto University Katsura…
We have determined the mechanisms leading to thermal rectification by applying the nonequilibrium Green's function method to study thermal transport through a one-dimensional asymmetric lattice. Thermal rectification occurs in the presence of nonlinear interactions and a nonuniform phonon frequency distribution. We sh…
Abstract The limiting oxygen index (LOI) values of EVA‐PVB and low density polyethylene (LDPE)‐poly(ethylene‐ co ‐vinyl alcohol) (EVOH) polymer blends containing hydrated filler‐type flame retardants and red phosphorus were measured. When used as the sole flame retardant, magnesium hydroxide [Mg(OH) 2 ] and alumina tr…
de Haas--van Alphen oscillations were measured in lanthanum tritelluride $({\text{LaTe}}_{3})$ to probe the partially gapped Fermi surface (FS) resulting from charge density wave (CDW) formation. Three distinct frequencies were observed, one of which can be correlated with a FS sheet that is unaltered by CDW formation…
The compound (bpy) 2 Mn III (μ-O) 2 Mn IV (bpy) 2, a structural model relevant for the photosynthetic water oxidation complex, was coupled to single Cr VI charge-transfer chromophores in the channels of the nanoporous oxide AlMCM-41. Mn K-edge EXAFS spectroscopy confirmed that the di-μ-oxo dinuclear Mn core of the com…
Abstract Blends based on various compositions of low‐density polyethylene (LDPE) and plasticized starch (PLST) were prepared by melt extrusion and molding in the form of sheets under hot press. The rheology properties during mixing were studied in terms of torque and temperature against mixing time. The structural pro…
A considerable improvement in the quality of TiO 2 coatings on multiwalled carbon nanotubes (MWNTs) was obtained by introducing a three-step purification and functionalization process which combines oxidation in air followed by sulfuric acid refluxes and reoxidation in air before synthesis of the TiO 2 coating by the…
The solubilization of four bioactive molecules with different polarities, in three reverse hexagonal (HII) systems has been investigated. The three HII systems were a typical reverse hexagonal composed of glycerol monooleate (GMO)/tricaprylin/water and two fluid hexagonal systems containing either 2.75 wt % Transcutol…
Novel semiconductor block copolymers were synthesized using nitroxide-mediated radical polymerization (NMRP). They are comprised of a hole conductor block carrying tetraphenylbenzidine pendant units (PVDMTPD) and a second poly(4-vinylpyridine) (P4VP) block suitable for the preferential incorporation of n-type semicond…
This paper describes the microstructural and mechanical properties of injection moulded Ti–6Al–4V parts. Ti–6Al–4V powder was injection moulded with wax based binder. The critical powder loading for injection moulding was 67·5 vol.-% for feedstock. Binder debinding was performed with solvent and thermal method. After…
Six new copper(II)-malonate containing complexes [Cu(dpydiol)(mal)(H 2 O)]·2H 2 O ( 1 ) (dpydiol = bis(2-pyridyl)methanediol), [Cu(dpa)(mal)(H 2 O)]·H 2 O ( 2 ) (dpa = 2,2′-dipyridylamine), [Cu(pyim)(mal)(H 2 O)]·H 2 O ( 3 ) (pyim = 2-(2-pyridyl)imidazole), [Cu(dpp)(mal)(H 2 O)]·3/2H 2 O ( 4 ) (dpp = 2,3-bis(2-pyridyl…
Two dendrimers were designed and synthesized that contain a 1,3,5-trisubstituted benzenoid core and incorporate 9 and 21 viologen (4,4'-bipyridinium) units in their branches in addition to hydrophilic (aryloxy) terminal groups. For comparison purposes, model compounds containing one and two viologen units were also st…
Formation of Mn 2+ -doped ZnSe quantum dots (Mn:ZnSe d-dots) with both branched and nearly spherical shapes has been studied. Structure analysis indicates that the Mn 2+ dopants were localized in the core of a branched nanocrystal. The growth of branched d-dots, rather than spherical ones, was achieved by simply varyi…
Sub-micrometer-sized chloroapatite blue phosphors are successfully synthesized from aqueous precursors using a spray pyrolysis method with a very short processing time and without any post-heat treatments. The as-prepared phosphors reveal high quantum efficiency in the long-UV range (around 80% under excitation at 400…
Abstract The layered perovskite GdBaCo 2 O 5 + δ (GBCO), recently proposed for intermediate temperature solid oxide fuel cell applications, was investigated and compared with Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3 – δ (BSCF) cathode material using La 0.9 A 0.1 Ga 0.8 Mg 0.2 O 2.85 (A=Sr,Ba) as electrolytes. Area‐specific res…