Materials Literature
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It has been shown in earlier chapters that during nonstationary nucleate boiling, a self-regulated thermal process occurs, where the surface temperature of a part to be quenched is kept above the saturation temperature. This provides an opportunity to greatly affect the martensite transformation process by either reta…
Fast disintegrating films of levocetirizine dihydrochloride useful for the treatment of acute allergic rhinitis and chronic urticaria have been developed by using the taste masking ability of cyclodextrins. The fast disintegrating films were prepared by solvent casting method. The films contained water-soluble polymer…
The green emission in ZnO can be identified as two characteristic emissions, namely high and low energy emissions, respectively. The study of band bending effect of ZnO surface demonstrates that oxygen vacancies cause both the core level and the valence band to shift to higher binding energy. The downward band bending…
The first Fe(ii)-based cyanometalate single molecule magnet [Cr(III)Fe(II)(2)] exhibits fully visible, frequency-dependent ac susceptibilities above 2 K.
We describe the synthesis of thermoresponsive, magnetic, optically anisotropic and orientable colloidal particles based on poly(N-isopropylacrylamide) hybrid microgels (PNIPAMs) with an embedded ellipsoidal hematite (α-Fe2O3) core. Our ability to orient the particles with a magnetic field is demonstrated by small angl…
Possible effects of sulfur on solid oxide fuel cell (SOFC) Ni anodes have been analyzed from the thermodynamic considerations of Ni–S–C–O–H systems by constructing the predominant area diagrams as the Ellingham diagram (oxygen potential vs temperature plot) with a parameter of partial pressure ( or ) of sulfur-contain…
This study is focused on the stability of weddellite, the dihydrate phase of calcium oxalate [CaC(2)O(4)·(2 + x)H(2)O], mainly detected in kidney stones and in oxalate films found on the surfaces of several ancient monuments. Its occurrence is a critical issue since, at environmental conditions, weddellite is unstable…
An optimized facile method has been developed to synthesize ultra-small monodisperse ceria nanocrystals (3 to 4 nm) strictly at RT. The presence of well resolved broad peaks ([111], [200], [220] and [311]) for as-synthesized samples reveal the formation of the cubic phase of ceria. The detailed characterization by TEM…
We report a protocol for the direct synthesis of hexagonal silica nanostrands inside anodic alumina membranes using cationic surfactants as templates. When coated with layers of trimethylsilyl moieties, the nanostrands were a powerful tool for the ultrafine filtration of noble metal and semiconductor nanoparticles.
CdSe:Gd nanoparticles have been successfully synthesized and stabilized in aqueous solution with large proton longitudinal relaxivity, potentially serving as dual model optical and MR imaging agents.
Rare earth upconversion nanophosphors (UCNPs) have been recognized as a promising new class of biological luminescent labels for fluorescence imaging. However, little work has been reported on the successful application of UCNPs in fluorescence imaging so far. The major problem with UCNPs arises from the difficulties…
Ladder-like structured polysilsesquioxane with carbazole groups showed unexpected high photo- and electroluminescence efficiencies both in solution and solid states due to its rigid silicone ladder structures, which efficiently isolated the carbazole groups and thus suppressed their excimer formations by inter- and in…
Partition and diffusion coefficients of volatile compounds in polymers have been broadly studied in the literature in order to provide the tools necessary to predict migration from the packaging materials to the food using the appropriate mathematical models. But often, food packaging materials are multilayer material…
The oxide layer spontaneously formed on zinc and an "electrochemically reduced" oxide has been characterised by a combination of X-ray photoelectron spectroscopy (XPS) and spectroscopic ellipsometry (SE). The onset of the main electronic absorption, which is directly related to the bandgap, is extracted from the SE me…
Melamine (M) produces supramolecular complexes MQ31, MQ11 and MQ13 with 6,7-dimethoxy-2,4[1H,3H]-quinazolinedione (Q) (numbers indicate respective molar ratios of components) and they produce thermoreversible hydrogels [≥0.1% (w/v)] at 30 °C. Optical microscopy shows fibrillar network morphology and on irradiation wit…
In this work, we describe a versatile approach to generate highly methylated mesoporous silica films exhibiting hexagonally-packed one-dimensional mesochannels oriented uniquely perpendicular to the underlying support. It involves the electro-assisted self-assembly (EASA) of tetraethoxysilane (TEOS) and methyltriethox…
By means of dimensional selection of natural lignocellulosic fibers, based on precise diameter measurements, it was recently possible to obtain fibers with relatively higher tensile strength. The present article overviews works on the statistical evaluation, through the Weibull analysis, of the ultimate tensile stress…
Changes in the ground and excited state electronic structure of the [Ru(bpy)(3)](2+) (bpy = 2,2'-bipyridine) complex induced by functionalization of bpy ligands with carboxyl and methyl groups in their protonated and deprotonated forms are studied experimentally using absorption and emission spectroscopy and theoretic…
Electrodes made of vertically-aligned ZnO nanorods (NRs) have been prepared and analyzed in dye sensitized solar cells (DSC). We report a ∼20% power conversion efficiency increase during the first hours of solar cell testing at 1000 W m−2 (AM 1.5). The latter has been attributed to the physisorption/chemisorption of t…
We have used molecular dynamics simulations to investigate the effects of radiation damage accumulation in two pyrochlore-structured ceramics, namely Gd2Ti2O7 and Gd2Zr2O7. It is well known from experiment that the titanate is susceptible to radiation-induced amorphization, while the zirconate does not go amorphous un…