Materials Literature
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Optical conductivity measurements on the organic metal $\ensuremath{\theta}\mathrm{\text{\ensuremath{-}}}(\mathrm{BEDT}\mathrm{\text{\ensuremath{-}}}\mathrm{TTF}{)}_{2}{\mathrm{I}}_{3}$ revealed that the system crosses over rapidly from a coherent quasiparticle state to an incoherent state with temperature. Despite th…
On-line attenuated total reflection−Fourier transform infrared (ATR−FTIR) spectroscopy and focused-beam reflectance measurement (FBRM) were used to monitor and control anti-solvent crystallization of paracetamol from an acetone−water mixture, which was conducted isothermally in a 1-L crystallizer with a flat bottom. A…
A conductive polypyrrole (PPy) film was successfully synthesized in a homogeneous supercritical carbon dioxide (scCO2)/acetonitrile (AN) system. The occurrence of a homogeneous supercritical state was confirmed by observations of the phase behavior of the system through a high-pressure cell with a viewing window. The…
Preparation of dawsonite-type compounds, NH 4 M(CO 3 )(OH) 2, was attempted for M = Al, Cr, or Fe, using a hydrothermal method under various basicity and thermal conditions. Crystalline structure and chemical composition verification studies, employing X-ray diffractometry, infrared spectroscopy, and elemental analyse…
A theory of fracture is presented that is based upon an extension of continuum mechanics to the nanoscale through the incorporation of long-range intermolecular forces which correct bulk material descriptions near interfaces. The surface energy on crack surfaces, which is given in terms of the long-range intermolecula…
The Zn 2s and 2p core level binding energies of ZnO and a few Zn oxo compounds containing Zn in its oxidation state +2 were calculated by means of wave function based quantum chemical ab initio methods. The computations were performed at two levels of approximation. First, Hartree-Fock calculations were carried out fo…
Abstract Iron-pillared clays (Fe-PILCs) were synthesized from hydrolyzed FeCl 3 solutions added to NaOH solutions using different synthesis conditions. X-ray diffraction, N 2 adsorption-desorption, chemical analysis, thermogravimetric analysis, differential thermal analysis, temperature-programmed desorption of ammoni…
We have outlined a theory of image formation in a transmission electron microscopy equipped with an environmental cell (E-TEM). We have applied the outlined theory to simulating high-resolution transmission electron microscopy (HRTEM) images of single-walled carbon nanotubes (SWNT's) in source gases of ethanol at the…
Abstract Study of the transformation of smectite to illite, chlorite or vermiculite via interstratified clay minerals needs precise qualitative and quantitative determinations of the different layers in the mixed-layer clays and is generally based on X-ray diffraction (XRD) patterns after specific treatments of the cl…
The vapor phase method was introduced for preparing anatase TiO 2 ‐coated multi‐wall carbon nanotubes. A sample uniformly covered with a thick layer of TiO 2 ranging from 20 to 50 nm was obtained. Compared with the commonly used hydrothermal system, this technique is of interest for easy control of a precursor contain…
Quantitative theory of the particle-interface interaction across a nonpolar medium is developed. We consider a spherical dielectric particle (phase 1), which is immersed in a nonpolar medium (phase 2), near its boundary with a third dielectric medium (phase 3). The interaction originates from electric charges at the p…
The reaction of the lanthanide trichloride hexahydrates [LnCl(3).6H(2)O] (Ln = Yb, Lu) with two equivalents of benzoylferrocenoylmethane resulted in the tetranuclear lanthanide hydroxo clusters [Ln(4)(mu(3)-OH)(4)(FcacacPh)(8)] (Ln = Yb (1), Lu (2); FcacacPh = benzoylferrocenoylmethanide). Compounds 1 and 2 are made u…
We present a comparison between experimental soft x-ray spectra and density of states calculations of hexagonal boron nitride ($h$-BN) and cubic boron nitride ($c$-BN) single crystals. Cubic boron nitride films, grown on both mirror and scratched single crystal silicon wafers, have also been investigated using soft x-…
This paper describes a carbon nanotube epoxy ply material that has electrochemical actuation properties. The material was formed by dispersing single-wall carbon nanotubes in a solvent and then solution casting a thin paper using a mold and vacuum oven. In order to take advantage of the high elastic modulus of carbon…
Surface-enhanced optical third-harmonic generation (THG) is observed in silver island films. The THG intensity from Ag nanoparticles is enhanced by more than 2 orders of magnitude with respect to the THG intensity from a smooth and homogeneous silver surface. This enhancement is attributed to a local plasmon excitatio…
We present the first theoretical estimates for thermoelastic properties of the noncrystalline domain (the “interlamellar phase”) of semicrystalline polyethylene obtained by Monte Carlo simulations. The interlamellar phase is prescribed to be thermodynamically metastable, with the constraints that it have an average de…
Abstract Summary: Hydroxyapatite, chitosan, and aliphatic polyester were compounded using a twin‐screw extruder. The polyesters include poly( ε ‐caprolactone) (PCL), poly(lactic acid) , poly(butylene succinate) (PBS), and poly(butylene terephthalate adipate). The mass fraction of chitosan ranged from 17.5 to 45%, whil…
The origin of the monoclinic distortion and domain formation in the quasi-two-dimensional layer compound $\mathrm{Nb}{\mathrm{Te}}_{2}$ is investigated. Angle-resolved photoemission shows that the Fermi surface is pseudogapped over large portions of the Brillouin zone. Ab initio calculation of the electron and phonon…
A new route has been investigated for layered double hydroxides (LDH) preparation using hydrolysis of metal salt precursors in polyol medium (ethylene glycol and diethylene glycol) under reflux. It constitutes a simple way to prepare hybrid LDH in soft chemistry conditions. The process of LDH formation rests on progre…
The hydrothermal synthesis of biomorphous nickel oxide (NiO) with pine template and nickel nitrate precursor is reported here. The morphology, porosity and connectivity of porous products in different length scales were characterized by field emission scanning electron microscopy, X‐ray diffraction and nitrogen adsorp…