Materials Literature
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A series of new tetrathiafulvalene-substituted 3,5-dimethylpyrazole ligands, 4-[{2,6,7-tris(methylthio)-TTF-3-yl}thio]-3,5-dimethylpyrazole (MTSPz*, Pz* = 3,5-dimethylpyrazole, 4a ), 4-[{6,7-benzo-2-(methylthio)-TTF-3-yl}thio]-3,5-dimethylpyrazole (BTSPz*, 4b ), 4-[{6,7-(ethylenedithio)-2-(methylthio)-TTF-3-yl}thio]-3…
Gypsum needle crystallization from a suspension of calcium sulfate hemihydrate grains in an aqueous solution is studied on a mesoscopic scale. We build a simulation model, which assumes that gypsum formation is limited by heterogeneous nucleation and precipitation with an initial autocatalytic surface-controlled needl…
Urchin-like VO(2)(B) nanostructures composed of radially aligned nanobelts have been synthesized by the homogeneous reduction reaction between peroxovanadic acid and oxalic acid under hydrothermal conditions. The influences of synthetic parameters, such as reaction times and the concentration of oxalic acid, on the mo…
Retinoblastoma (RB), a carcinoma of the retina, is caused by mutations in the long arm of chromosome 13, band 13q14. The esterase D (ESD) gene maps at a similar location as the RB gene locus and therefore serves as a potential marker for the prognosis of retinoblastoma. Because very little is known about the structure…
We identify a link between the glass transition and percolation of regions of mobility in configuration space. We find that many hallmarks of glassy dynamics, for example, stretched-exponential response functions and a diverging structural relaxation time, are consequences of the critical properties of mean-field perc…
Electroless polymerization of aniline on platinum is investigated for polyaniline micro- and nanostructuring into practical electronic devices. This type of reaction is adapted to estimate its usefulness in a lithographic process. For practical electronic device fabrication, electroless polymerization of aniline can b…
The effect of iodide ions on the corrosion inhibition of aluminium in 2M HCl in the presence of polyvinylpy- rollidone (PVP) was studied using gasometric (hydrogen evolution) technique at 30-60 o C. Results obtained showed that PVP effectively reduces the corrosion rates of aluminium in the acid medium. Inhibition eff…
In this work we synthesized two inverse kinds of cobalt and zinc oxide nanocomposites (CoO/ZnO and Zn 1− x Co x O/Co 1− y Zn y O) and compared methodologistic features observed from the syntheses. The binary oxide system chosen herein is because divalent cobalt and zinc have very similar ion radii, and they interdiffu…
Optical gain and stimulated emission processes in Si nanostructures are controlled by the dynamics of high-density carriers. Here, we report photoluminescence (PL) dynamics and multiexciton recombination in ${\text{Si}}_{1\ensuremath{-}x}{\text{Ge}}_{x}/\text{Si}$ superlattices (SLs) under high-density excitation. Sat…
DMF-appended cyclometalated platinum(II) and -(IV) porphyrins were synthesized via the double cleavage of sp(2) C-H and sp(3) C-H bonds on one platinum center.
The evolution from nanostripes to monodomains is explored in ferroelectric ${\text{BaTiO}}_{3}/{\text{SrTiO}}_{3}$ (BT/ST) superlattices under dc and ac electric fields via the use of a first-principles-based technique. Such evolution involves original states that result in the decoupling of (static and dynamical) pro…
In this paper there is presented the structure and proprieties of the modeling cast magnesium alloys as cast state and after heat treatment, depending on the cooling medium (furnace, water, air), with different chemical composition. The improvement of the manufacturing technique and chemical composition as well as of…
A twin-tapered bi-1,3,4-oxadiazole derivative (BOXD-T8) showed a monomeric feature and intramolecular charge transition at concentrations lower than 10(-5) mol/L. BOXD-T8 molecules self-assembled to nanoparticles and further to helical nanofibers with blue fluorescence emission in DMSO, while nanoribbons resulted in a…
In-situ scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS) measurements have been performed to investigate the formation and thermal stability of mono- and bimetallic Au x Fe 1-x ( x = 1, 0.8, 0.5, 0.2, 0) nanoparticles (NPs) supported on TiO 2 (110). Nearly hexagonal arrangements of size-s…
Spectroscopic and photodynamic properties of polymeric films bearing porphyrin units have been studied in both solution containing photooxidizable substrates and in vitro on Escherichia coli and Candida albicans microorganisms. The films were formed by electrochemical polymerization of 5,10,15,20-tetra(4-N,N-diphenyla…
Bioactive monetite (anhydrous calcium hydrogen phosphate, CaHPO(4)) with orderly layered structure assembled by nanosheets has been successfully synthesized by a sonochemical-assisted method in the presence of cetyltrimethylammonium bromide (CTAB). The thicknesses of the nanosheets are 100-200 nm, and the lateral size…
We report the growth of hierarchical nanostructures on a photo-crosslinked SU-8 surface through alternating layer-by-layer Michael addition reactions between poly(ethyleneimine) (PEI) and dipentaerythritol pentaacrylate (SR399) to generate grafted hyperbranched poly(ester amines) (HPEA). Initial surface treatment with…
The atomistic and electronic structures of ${\text{PbTiO}}_{3}$ nanowires with characteristic edges consisting of (100) and (010) surfaces and the crucial role of axial tensile strain on ferroelectricity have been investigated by means of ab initio density-functional theory calculations. Ferroelectricity is enhanced a…
A reversed microemulsion was first adopted to prepare the Ce−Zr−Sr ternary mixed oxide with different Sr content. The Pd-only three-way catalyst (TWC) was obtained by incipient wetness impregnation with 0.5 wt % Pd loading. The structural and oxygen handling properties have been analyzed by XRD, Raman, H 2 -TPR, and t…
Both cage and noncage structures of (Fe(2)O(3))(n) (n = 2-6 and 10) clusters are studied using density functional theory. All the cage structures are stable without imaginary vibrational frequency but the global minima are the noncage clusters for most cases. Our results show that oxidation of Fe(4)O(n) (n<6) clusters…