Materials Literature
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Cubic potassium tantalite niobate [KTa1−xNbxO3 (KTN)] crystals of large size, good quality, and varying Nb concentration have been grown by the Czochralski method and their thermal properties have been systematically studied. The melting point, molar enthalpy of fusion, and molar entropy of fusion of the crystals were…
A detailed nano-size and temperature-dependent Raman scattering study of the E g(1) mode was carried out from 83 to 723 K for nanocrystalline anatase with sizes of 5.6, 8.6, and 19.4 nm. The E g(1) Raman spectra were fitted and calculated on the basis of a combined model of both anharmonic coupling and phonon confinem…
The redox interactions of iron, manganese, and copper ion pairs including absorption characteristics in a multicomponent soda-lime-silica glass, were investigated. Glasses containing 11–19 mol % Na2O were melted under an air atmosphere in an electric furnace at 1450°C for 8 h. The results of chemical analysis indicate…
By employing silica nanostructures as spacers, an experimental approach is developed to enable one broadband dielectric measurements on the molecular dynamics taking place in the immediate (nanometric) vicinity of solid interfaces. This development renders to broadband dielectric spectroscopy--traditionally a bulk tec…
Abstract The phenomenon of stress reorientation of hydrides in fuel cladding tubes was studied with the help of a test technique named as the “cladding tube deformation test” (CTDT). Unirradiated Zircaloy-2 (Zry-2) cladding tube specimens charged with 250 ppm of hydrogen were tested. The test consisted of heating spec…
Well-defined oligo(phenylene vinylene) (OPV) molecules with phosphine oxide chain-ends were prepared and used for surface functionalization of CdSe quantum dots. Interestingly, OPV-covered CdSe nanostructures exhibit photoluminescence emission properties characteristic of linear dipoles, similar to those found in orga…
We report a new methodology for the size-controlled aqueous synthesis of gold nanoparticles using geminis with different spacers as ligands. Geminis possess a unique structure in which two hydrophobic chains and two polar headgroups are combined via a spacer. We herein demonstrate that the spacer can be used as a tool…
A series of highly π-conjugated nonsymmetrical liquid crystals, based on the core 3,5-(disubstituted)-1,2,4-oxadiazole with a shape similar to a hockey stick, were successfully synthesized by convergent Sonogashira coupling reaction between the building blocks of aryl iodides and the corresponding terminal arylacetyle…
Abstract A new 1,3‐diketonato ligand containing both an electron‐donor [4‐(dimethylamino)benzene] and an electron‐acceptor (4‐nitrobenzene) group and its lanthanide complexes have been prepared. They display an intense intra‐ligand charge‐transfer absorption transition in the visible region of the spectrum at 400–550…
In this communication, the three dimensional architectures of different Al-Si-(Mg) alloys are analyzed using SEM (Scanning Electron Microscopy)/FIB (Focus Ion Beam), EDS (Energy Dispersive Spectroscopy)/FIB and SEM-EDS/FIB tomographic methods. Several aspects for the imaging and quantification of the results are discu…
Various switching engines such as MEMS, liquid crystal, and phased arrays, can be used to implement a colorless WSS. Switching engine affect on device design characteristics and implications on specifications for future applications are discussed.
Electrochromic Thin Film Fabricated Using a Water-Dispersible Ink of Prussian Blue Nanoparticles, Shiozaki, Hirofumi, Kawamoto, Tohru, Tanaka, Hisashi, Hara, Shigeo, Tokumoto, Madoka, Gotoh, Akihito, Satoh, Tetsutaroh, Ishizaki, Manabu, Kurihara, Masato, Sakamoto, Masatomi
One of the central challenges of nanoscience is fabrication of nanoscale structures with well-controlled architectures using planar thin-film technology. Herein, we report that ordered nanocheckerboards in ZnMnGaO4 films were grown epitaxially on single-crystal MgO substrates by utilizing a solid-state method of the p…
A clean, facile route of using only common bulk selenium (Se) powder and silver (Ag) foil in a simple solvothermal process is developed to synthesize a film of silver selenide (Ag 2 Se) dendrites of highly oriented (001) nanocrystals. The simple process takes ∼10 h at 160 °C in a common alcohol such as methanol or eth…
The dielectric relaxation and ac conduction of CaCu3Ti4O12 (CCTO) ceramics were investigated at different temperatures under a dc bias. The dc bias gives rise to space charge accumulation, i.e. an electrode response, resulting in the significant increase of dielectric permittivity and dielectric loss tangent. Two Deby…
A one-step synthesis method is described to prepare high-quality ultrafine inorganic semiconductor nanocrystals via a two-phase interface hydrolysis reaction under hydrothermal conditions. With the synthesis of ZrO2 quantum dots as an example, we show that the prepared nanocrystals have good monodispersity and high cr…
Abstract Synchrotron-based XANES characterization of sulphated sulphur combined with atomic force microscopy and transmission electron microscopy (imaging and diffraction) allow insights into the crystallization of the calcareous units produced by invertebrates. As a result of a series of converging data, reticulate c…
Efficient selective oxidation of ketones to lactones by molecular oxygen with benzaldehyde as an oxygen acceptor, in the presence of metalloporphyrins, has been reported. Iron(III) meso-tetraphenylporphyrin chloride ( Fe ( TPP ) Cl ) showed excellent activity and selectivity for oxidation of cyclohexanones under mild…
The vibrational, optical, and nonlinear optical (NLO) properties of a series of push−pull chromophores built around dithienylethylene-based π-conjugating spacers have been investigated by UV−vis, IR, and Raman spectroscopies and electric field-induced second harmonic generation (EFISH) measurements. The effects of the…
Novel biodegradable nanocomposites containing multi wall carbon nanotubes (MWCNT) and poly(citric acid) (PCA) were successfully synthesized. For preparation of nanocomposites, MWCNT was opened using a mixture of sulfuric and nitric acid and its derivative containing – COOH and – OH functional groups was obtained. Poly…