Materials Literature
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Abstract A new straightforward strategy for synthesis of novel hyperbranched poly (ether amide)s from readily available monomers has been developed. By optimizing the reaction conditions, the AB 2 ‐type monomers were formed dominantly during the initial reaction stage. Without any purification, the AB 2 intermediate w…
The capillary rise of liquid in the gap between two closely spaced parallel cylinders, whose radii may be identical or different, is modelled in this paper. On the basis of the minimum free energy principle and interfacial analysis, the vertical capillary rise of liquid at equilibrium was calculated as a function of d…
Abstract ZnO crystals were synthesized from basic aqueous solutions including zincate ions stabilized with triethanolamine (N(C 2 H 4 OH) 3 , teaH 3 ) by heating at 60°C. The influence of the basicity of the solutions on the morphology of the ZnO crystals was examined. The aqueous solutions were prepared using ZnSO 4…
The optical properties of quantum dots (QDs) containing a single magnetic impurity are studied within a multiband envelope function formalism. We present a unified treatment of different kinds of Mn-doped semiconductor QDs: spherical and ellipsoidal nanocrystals (NCs) and self-assembled quantum dots (SAQDs), focusing…
It is a great honor to dedicate this paper to Professor V. Ginzburg on the occasion of the jubilee of his 90th birthday. We wish him a long and peaceful life. A Landau-Ginzburg theory of the phase ...
A short review on BaTiO 3 -based solid solutions is presented. The (x – T) phase diagrams are discussed (x is the molar concentration of the second end-member of a solid solution). Two specific points in the phase diagrams of many solid solutions are determined. These points are points of the convergence of three phas…
Lanthanum hexaboride(LaB 6 ) films have been deposited on silicon tip field emitters by electron-beam evaporation. The field emission characteristics are studied in a diode test cell in a vacuum system. The experimental results show that the field emission stability of the LaB 6 -coated Si-tip FEA can be improved and…
β-Zn 4 Sb 3 is a promising thermoelectric material for energy conversion applications due to its exceptional low thermal conductivity. In this report, the effect of In substitution on thermoelectric properties and β to α/α' phase transition of indium doped compounds (Zn 1− x In x ) 4 Sb 3 ( x = 0–0.02) were investigat…
We report a detailed study of the magnetophotoluminescence of single-wall carbon nanotubes at various temperatures in fields up to $58\phantom{\rule{0.3em}{0ex}}\mathrm{T}$. We give direct experimental evidence of the diameter dependence of the Aharanov-Bohm phase-induced band gap shifts. Large increases in intensity…
The potential energy profiles for the Fe+- and Mn+-assisted reduction of N2O by CO were studied at the B3LYP density functional level in order to get the differences in the reaction mechanisms determining the efficiency of iron and the inactivity of manganese as ionic catalysts. Both ground and excited states of catio…
Abstract Five 1,1,3‐trisubstituted naphtho[2,3‐ c ]pyran‐5,10‐dione derivatives were designed and synthesized in five steps from 2‐acetyl‐1,3‐indandione. Prepared quinones 6a – e instantly changed from either red or blue to yellow or orange red, when treated with sodium borohydride in methanol. The resulting reduced h…
Structural and surface morphology studies of MnF2 epitaxial layers have been performed by x-ray diffraction and atomic force microscopy (AFM). MnF2 layers of different thicknesses (0.12–1.25 µm) were grown by MBE on Si(0 0 1) substrates with the deposited CaF2-buffer layer having a 1 1 0 orientation and a grooved and…
The orientation growth and angle-dependent photoluminescence (PL) of nitrogen-doped SnO2 films grown on Si substrate by reactive magnetron sputtering have been studied. It was found that the orientation of the nitrogen-doped SnO2 films depends strongly on their thickness, and a highly [1 1 0]-oriented film was achieve…
In this article, a salted sol-gel and a salted sol-gel combustion method were developed for nanophosphor synthesis. Massive nanophosphor production becomes possible by using these novel methods. Some blue, green, and red LED nanophosphors were prepared by using these novel methods. Morphology, growth mechanism, and lu…
Abstract A novel preparation method for the core‐shell type biodegradable polyesters or biodegradable materials grafted with biodegradable polyesters was developed by alkaline surface treatment of biodegradable polyester films and subsequent enzymatic polymerization of aliphatic lactones, one example of which is shown…
(Ca 1− x ,Zn x )TiO 3 :Pr, B red phosphor particles were prepared using the peroxide‐based route and their photoluminescent (PL) properties were investigated by changing the sintering temperature, the concentration of the activator, the ratio of Ca to Zn, and the amount of H 3 BO 3 flux. For the CaTiO 3 :Pr phosphor,…
The complex dendrimeric contrast agent Gadomer has been comprehensively characterized using various mass spectrometric techniques in combination with capillary electrophoresis. The analytical challenges arising from the structure of this analyte, e.g., the presence of a complex isotopic pattern originating from multip…
This work presents the hydrothermal synthesis and photoluminescence (PL) properties of La 2− x Eu x Sn 2 O 7 ( x =0–2.0) nanocrystals. The complex stannates with different La/Eu ratios ranging between La 2 Sn 2 O 7 and Eu 2 Sn 2 O 7 have been synthesized and characterized with respect to crystal structure, particle si…
A review is given on the studies of microscopic magnetic properties and macroscopic dielectric properties as functions of temperature, magnetic field, and the variety of R 3 + (R = rare-earth, Bi, and Y) ions in the multiferroic RMn 2 O 5 compounds by neutron diffraction and dielectric measurements. We have observed s…
Langmuir-Blodgett (LB) films are well known structures prepared as a result of successive transfer of monolayers (ML) from the gas-liquid interface onto solid substrates. One impressive possibility of LB method is the opportunity to vary the thickness of the film to an accuracy of one transfer, which could coincide wi…