Materials Literature
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Selective formation of different polymorphs of calcium carbonate (CaCO 3 ) in the solid state using aromatic organic acids as ligands for Ca 2+ coordination has been reported. The formation of pure calcite and vaterite phase in bulk amount can be nicely captured by the choice of suitable solid state routes, employed i…
Structural reordering in monolayers of gold nanoparticles during transfer from water surface to solid substrate has been studied by synchrotron x-ray scattering techniques. Grazing incidence diffraction (GID) and grazing incidence x-ray off-specular scattering (GIXOS) measurements were performed as a function of time…
Pyrene has been a popular molecular structure in the noncovalent functionalization of single-walled carbon nanotubes (SWNTs), and the selectivity between metallic and semiconducting SWNTs for the underlying interactions has been exploited for the postproduction metallic–semiconducting nanotube separation. Two pyrene d…
We have used electron spin resonance to study an epitaxial thin-film sample of the manganite La${}_{0.6}$Ca${}_{0.4}$MnO${}_{3}$ in which ferromagnetic and paramagnetic phases were previously shown to coexist [Phys. Rev. B 78, 054409 (2008)]. Resonant absorbtions arise on either side of the paramagnetic resonance and…
Abstract Statistical copolymers of methyl methacrylate (MMA) with 2‐methacryloyloxyethyl ferrocenecarboxylate (MAEFC) were prepared by free radical polymerization. The reactivity ratios were estimated using the Fineman‐Ross, inverted Fineman‐Ross, Kelen‐Tüdos, and extended Kelen‐Tüdos graphical methods. Structural par…
The interface thermal resistance becomes more and more important as device miniaturization for better performance renders a large surface-to-volume ratio and invariably requires a device design with multiple materials inducing thermal interfaces across the material heterogeniety. Toward developing a comprehensive comp…
Equations for the mass conservation law and the molecular parameters observed in spectroscopic experiments have been derived for non-covalent, non-cooperative, one-dimensional self-assembly in systems containing two types of interacting molecules (hetero-association), taking into account "reflected" complexes and "edg…
Low temperature, reversible mechanical effects in BiMnO3–PbTiO3 are shown to be analogous to those reported in multiferroic BiFeO3. The same stiffening (on cooling) has been found in ferroelectric BiScO3–PbTiO3 that shows negligible conduction. This has allowed permittivity and polarization studies, not possible in Bi…
We report the synthesis and characterization of Sb-doped Te-rich nanotubes, and study their memory switching properties under the application of electrical pulses. Te-rich nanotubes display significantly low writing currents due to their small cross-sectional areas, which is desirable for power-efficient memory operat…
Abstract In this article, we demonstrated that within a hydrophilic biopolymer–plasticizer system, the molecular “activity” of the plasticizer also influenced the extent of these interactions. We demonstrated through an analysis of crystallinity and calorimetry results that the equilibrium moisture content within the…
Metal transition and superconductivity were observed in Li-doped $\ensuremath{\alpha}$-rhombohedral boron (\ensuremath{\alpha}-B${}_{12}$). The authors have established a purification method and obtained a large amount of high-purity $\ensuremath{\alpha}$-B${}_{12}$ powder. Li doping into purified $\ensuremath{\alpha}…
With extensive first-principles density-functional-theory calculations, we investigate the stability and the atomic and electronic structures of the CrB(2)(0001) and MoB(2)(0001) surfaces, each with two different terminations. It is found that the boron-terminated surface is energetically more favorable over the wide…
Dynamic switching spectroscopy piezoresponse force microscopy is developed to separate thermodynamic and kinetic effects in local bias-induced phase transitions. The approaches for visualization and analysis of five-dimensional data are discussed. The spatial and voltage variability of relaxation behavior of the a-c d…
A method to calculate the transmission coefficient in multiterminal systems is presented. By adding a complex absorbing potential to the Hamiltonian of the semi-infinite leads, the problem of inverting an infinite dimensional matrix is transformed into a finite dimensional eigenvalue problem. Using this approach trans…
We report on the lattice location of Mn in heavily p-type doped GaAs by means of β− emission channeling from the decay of M56n. The majority of the Mn atoms substitute for Ga and up to 31% occupy the tetrahedral interstitial site with As nearest neighbors. Contrary to the general belief, we find that interstitial Mn i…
A simple soft-core model potential is proposed to discuss the self-diffusion of biomolecules in solution. Extensive Brownian-dynamics simulations are performed to obtain the long-time self-diffusion coefficient. Then the simulation results are compared with the experimental data from a unified point of view recently o…
The instability of silver nanoblocks under atmospheric conditions is investigated. The localized surface plasmon resonance band of the silver nanoblocks shows a red shift, broadening, and damping with increasing storage time under atmospheric conditions. The change in spectral properties of silver nanoblocks is consid…
The structural and magnetic properties of Mn2FeSbO6 single-crystalline mineral and ceramic samples synthesized under thermobaric treatment have been investigated, and compared to theoretical predictions based on first-principles electronic structure calculations. This ilmenite system displays a sharp magnetic transiti…
In this paper, Ag-Au alloy nanoparticles (NPs) were fabricated by dewetting process to enhance the broadband antireflection performance of textured silicon surfaces. The alloy NPs presented a large range of shapes and sizes, which provided an average reflectance (AR) below 4% over the spectral range of 300~1200 nm, a…
Abstract Scheelite type red phosphors CaLa 1– x NbWO 8 : x Eu 3+ ( x = 0.01, 0.03, 0.05, 0.1, 0.15, 0.2, and 0.25) and CaLa 0.8– y NbWO 8 : 0.2Eu 3+ , y Bi 3+ ( y = 0.1, 0.15, and 0.2) were prepared by conventional solid state reaction route. The crystalline structure, morphology and absorbance of these phosphors were…