Materials Literature
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Four heteronuclear complexes, [Ln2Co2L10(H2O)(phen)2] · n(H2O) (Ln = La 1, n = 2; Ln = Nd 2, Sm 3, Gd 4, n = 0; HL = α-methylacrylic acid, phen = 1,10-phenanthroline), have been synthesized and characterized by elemental analysis, IR and X-ray diffraction. The complexes with a discrete Co–Ln–Ln–Co tetranuclear molecul…
The solid solubility cO of oxygen in palladium in equilibrium with gaseous oxygen has been determined from absorption-desorption experiments for temperatures T of 1123 and 1173 K and oxygen partial pressures $$ p_{{{\text{O}}_{2} }} $$ between 2.7 × 103 and 4.0 × 104 Pa. The relationship between cO, $$ p_{{{\text{O}}_…
For the long-term safety assessment of deep radioactive waste repositories an understanding of the interactions of actinides with mineral surfaces at a molecular level is necessary. The retention/mobility of the released radionuclides is strongly dependent on sorption/desorption reactions at mineral surfaces. Thus, a…
0.7Bi (Fe 1− x Cr x ) O 3 –0.3BaTiO 3 ( x =0, 0.05, 0.1, 0.15, 0.2) solid solutions were prepared by the traditional ceramic process. X‐ray diffraction revealed that all samples with x =0–0.15 showed pure rhombohedral perovskite structure. Frequency dependences of dielectric constants and dielectric loss were investig…
This paper discusses about miniaturization of microwave resonators based on the artificial dielectric concept. Very high effective permittivity will contribute to reduce the dimension of resonators significantly, though the unloaded Q is deteriorated. Its recovery should be possible by controlling the thickness of met…
Ab initio molecular dynamics, which employs density functional theory, is used to study thermal energy transport phenomena in nanoscale structures. Thermal equilibration in multiple thin layer structures with thicknesses less than 1 nm per layer is simulated. Different types of layer combinations are investigated. Per…
To describe the swelling of polyelectrolyte multilayers (PEMs) on a molecular scale, the PEM architecture is varied. The polyanion is poly(styrenesulfonate) (PSS) and the polycation poly(allylamine hydrochloride) (PAH). PEM either consists of 10 protonated polyelectrolyte bilayers (p 10 ), 10 deuterated bilayers (d 10…
We report on the formation of the assembled bundle structure of thin multiwalled carbon nanotubes (t-MWNTs) modified with hydroxyl groups, which was assisted by the intertube hydrogen bonding interaction. To achieve this, the t-MWNTs were first functionalized with hydroxide (t-MWNT-OH) by reflux in hydrogen peroxide.…
A two-dimensional nanodrop on a vertical rough solid surface is examined using a nonlocal density functional theory in the presence of gravity. The roughness is modeled either as a chemical inhomogeneity of the solid or as a result of the decoration with pillars of a smooth homogeneous surface. From the obtained fluid…
The equilibrium geometries of the exohedral and endohedral complexes of the polyhedral oligomeric silsesquioxane (POSS) cage (HSiO 3/2 ) 8 containing the transition metal atoms or ions Sc 0,+, Cr 0,+, Fe 0,+, Co 0,+, Ni 0,+, Cu 0,+, Zn 0,+, Mo 0,+, W 0,+, Ru 0,+, Os 0,+ have been investigated at the B3LYP/LanL2DZ leve…
Based on first-principle full-potential linearized augmented plane wave generalized gradient approximation calculations, we have investigated electronic structure of synthesized superconductors LaMBiO, where $M=\text{Ni}$ or Cu as examples of bismuth-containing compounds in the family of superconducting quaternary oxy…
Basic groups from acid hydrolysis: 1,3,5-Triazaadamantanes (TAAs) are shown to degrade in acidic conditions to produce basic byproducts (see scheme). The rate of hydrolysis can be tuned by changing the substituents present on the aromatic rings. TAA-containing dendrimers can be synthesized readily as a result of the b…
Highly (100)‐oriented Pb(Zr 0.20 Ti 0.80 )O 3 (PZT) thin films for electrically tunable applications were prepared on Pt(111)/Ti/SiO 2 /Si(100) substrates by RF magnetron sputtering with a PbO x buffer layer. The dielectric properties of PZT films were investigated. These results indicated that the applied electric fi…
Abstract Novel nanophase hexagonal structured polyaniline (PANI) and poly(2,5‐dimethoxyanilines) (PDMA) were synthesized by oxidative polymerization involving the respective anilines and a mixture of ferric chloride and ammonium persulfate. The morphological, spectral and electrochemical characteristics of the polymer…
A synthetic route is described for collagen-like polypeptides constructed from O-phospho-L-hydroxyproline [Hyp(PO(3)H(2))] residues. Using the synthetic polypeptides and a natural protein, gelatin, fine fibers and their network structures (ESNWs) were prepared via electrospinning. The composite ESNWs can induce the mi…
Crystallization of water during heating, the so-called "recrystallization of water", in poly(2-methoxyethylacrylate) (PMEA) was investigated by temperature-variable Fourier transform infrared spectroscopy. Recrystallization in a polymer-water system is generally understood to be a phase transition from glassy water (c…
In this article we study helical inclusions of a certain shape (called the “optimal shape”), such that the electric, magnetic, and magneto-electric polarizabilities are equal, and discuss unusual refractive and absorptive properties of artificial chiral materials based on such inclusions. We propose a new method of an…
The plasmonic properties of aligned silver nanoparticles grown by atomic terrace low-angle shadowing (ATLAS) were studied by optical transmission spectroscopy. ATLAS is a novel nanofabrication technique that combines the advantages of self-assembly with control of the nanostructure features. The silver nanoarrays were…
Highly dispersed ZnO quantum dots (QDs) in polyvinylpyrrolidone (PVP) nanotubes have been prepared by a single capillary electrospinning. The structure and optical properties characterizations were performed by x-ray diffraction, scanning and transmission electron microscopy, absorption, photoluminescence, and resonan…
The optical spectra of individual Ag-Au alloy hollow particles were correlated with the particles' structures obtained by transmission electron microscopy (TEM). The TEM provided direct experimental access to the dimension of the cavity, thickness of the metal shell, and the interparticle distance of hollow particle d…