Materials Literature
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Atomic number contrast (Z-contrast) imaging using high-angle annular dark field (HAADF) detector, along with high resolution electron microscopy (HREM), is used to study the nanostructured metal, semiconductor, mixed oxide, and soft matter composites of inhomogeneous nature. A comparison between the HREM and HAADF ima…
Nanosized ZnxMn1-xFe2O4 powders were prepared in ethylene glycol solution under mild temperature and pressure conditions by precipitation from metal nitrates. The average size and distribution of the synthesized ZnxMn1-xFe2O4 powders were 10- 20 ㎚ and narrow, respectively. The magnetic property of the synthesized ZnxM…
We report the ionic relaxation and mixed mobile ion effect in 50ZrF4−10BaF2−10YF3−(30−x)LiF−xNaF fluoride glass series, where fluorine anions participate in the diffusion process in addition to alkali cations, unlike mixed alkali oxide glasses and crystals. By analyzing the ion dynamics in the framework of a power-law…
Snapshot hyperspectral imaging simultaneously acquires spatial and spectral information about a scene. We report on the first, to our knowledge, all-reflective snapshot hyperspectral imager in the form of a computed tomography imaging spectrometer (CTIS). The reflective design allows for instrument simplicity for appl…
A novel europium complex, Eu(Hdinic)(dinic)(H2O)5·4H2O (dinic = 2,5-pyridinedicarboxylic acid), has been synthesized under hydrothermal conditions and characterized structurally by X-ray diffraction methods. The complex has a mononuclear molecular structure, is monoclinic, space group C2/c, with a = 13.877(5), b = 9.6…
Generation of new carbon nanotube sample types, including individualized nanotubes suspended in surfactant solutions and recently synthesized ultralong nanotubes, has enabled new experimental studies that provide useful insight into nanotube structure and photophysical behavior. We present a review of Raman studies pe…
Magnetite (Fe3O4) has attracted much interest due to its unique properties such as the Verwey transition and 100% spin polarization at the Fermi surface. In this study thin films of epitaxial magnetite were grown on MgO and MgAl2O4 substrates using pulsed laser deposition. Previous studies suggested that the Verwey tr…
A series of oxalato-bridged dinuclear copper(II) complexes of the general formula [Cu2(Pz2CPh2)2(X)2(mu-C2O4)] (X = Cl- (1), NO3(-) (2), ClO4(-) (3); Pz2CPh2 = diphenyldipyrazolylmethane) or [Cu2(Pz(3m)2CPh2)2(H2O)2(mu-C2O4)](NO3)2 x H2O (4) (Pz(3m)2CPh2 = diphenylbis(3-methylpyrazolyl)methane) was synthesized where t…
Zinc oxide nanowires (ZnO NWs) were successfully synthesized on the ITO/PET polymer substrates by a hydrothermal method. X-ray diffraction, scanning electron microscopy, and transmission electron microscopy investigations were carried out to characterize the crystallinity, surface morphologies, and orientations of the…
A series of ceria nanoparticles were synthesized by using a microemulsion method. The effect of relative concentration of surfactant/water on the size and the surface roughness of ceria nanoparticles was examined using transmission electron microscopy (TEM) and atomic force microscopy (AFM) respectively. The investiga…
Atomistic mechanisms that determine atomic coordination and local concentration of dopants at $\ensuremath{\Sigma}5$ $(310)∕[001]$ symmetric tilt grain boundaries in ${\mathrm{Y}}_{2}{\mathrm{O}}_{3}$-doped ${\mathrm{ZrO}}_{2}$ are analyzed using atomistic simulation techniques. Segregation mechanisms are found to be…
Surface-enhanced Raman scattering (SERS) spectra of the biologically important 2-aminobenzothiazole (2-ABT) molecule adsorbed on silver hydrosols are compared with its FTIR spectrum and normal Raman spectroscopy (NRS) spectrum in the bulk and in solution. The optimized structural parameters and the computed vibrationa…
Expressions for the random-distribution and cluster-formation models for light-induced changes in crystals studied by time-resolved diffraction are presented. The two models can be distinguished on the basis of differences in the predicted intensities. The light-induced increase in the atomic displacement parameters i…
We have investigated the excited-state properties and singlet oxygen ((1)Delta(g)) generation mechanism in phthalocyanines (4M; M = H(2), Mg, or Zn) and in low-symmetry metal-free, magnesium, and zinc tetraazaporphyrins (TAPs), that is, monobenzo-substituted (1M), adjacently dibenzo-substituted (2AdM), oppositely dibe…
Abstract Superparamagnetic and biodegradable/biocompatible core–corona nanocomposite particles were prepared by ring‐opening polymerization of ϵ‐caprolactone initiated from the surface of maghemite. As was done in a previous work, an aminosilane coupling agent was chosen as the coinitiator and immobilized at the surfa…
Synchrotron radiation circular dichroism (SRCD) spectroscopy is emerging as an important new tool in structural molecular biology. Previously we had shown that in lower-flux SRCD instruments, such as UV1 at ISA and beamline 3.1 at the SRS, vacuum ultraviolet (VUV) radiation damage to proteins was not evident after exp…
We report gain measurements in Tm(3+)/Yb(3+)-codoped tellurite glass fibers in the 1460-1530-nm region using a conventional 980-nm pumping scheme. The gain spectrum is dependent on the geometry of the fiber and the length owing to the superfluorescence upconversion pump scheme.
We study the inversion of critical angle when a wave propagates through an anisotropic and a bianisotropic metamaterial exhibiting negative permittivity and negative permeability along some specific directions. This inversion of critical angle is explained by the dispersion relation of the medium, which shows that wav…
In this paper we present a simple approach of nanodispersing single-walled carbon nanotubes (SWCNTs) in a non-polar 1,2-dichloroethane (DCE) solvent. After filtration with isopropanol and acetone, the purified SWCNTs were immersed in DCE, followed by sonication for about 15 hours. The samples were further centrifuged…
This collection constitutes an essential sourcebook for researchers, producers and users seeking technical information on materials with foam-like structures.The collection is unique, in that it brings together people from the fields of metals and polymers. Both material types derive their advantageous properties from…