Materials Literature
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Foam tests and model experiments with sodium dodecylbenzenesulfonate solutions are performed to clarify how the foam stability and the foaminess are affected by several oils of different chemical structure. The foam tests show that 2-butyloctanol (2BO, branched alkanol) and isohexyl-neopentanoate (IHNP, branched ester…
Analytical calculations based on finite-size spin-wave theory and Monte Carlo (MC) simulations are performed to investigate the validity of the well-known relation m(H,T)=M(H,T)B_D[M(H,T)NH/T] between the induced magnetization m of the magnetic particle and its intrinsic magnetization M for the Ising and isotropic cla…
Direct spray coating, a new photoresist deposition technique, is investigated to evaluate its potential for pattern transfer on wafers with very large topography. An Electronic Vision EV101 spray coating system is employed and AZ4823 photoresist is selected to form a thick layer of resist on flat wafers and to produce…
The electronic structures and magnetic properties of layered perovskite LaSrMnO 4 and Ca 2 RuO 4 have been determined using the full-potential linearized augmented-plane-wave method within the local spin-density approximation (LSDA) and the LDA + U approach (LDA standing for local density approximation). The results o…
Micro-Raman spectroscopy is applied to study structural changes in the vicinity of the domain walls in ferroelastic lead phosphate Pb 3 (PO 4 ) 2 . The Raman spectra measured in untwinned and in heavily twinned regions of monoclinic Pb 3 (PO 4 ) 2 are studied and the observed differences are analysed on the basis of c…
The effect of temperature on photochromic reaction of amphiphilic spiropyran, 1’,3’-dihydro-3’,3’-dimethyl-6-nitro-1’-octadecyl-8-(docosanoyloxyme thyl)spiro[2H-1-benzopyran-2,2’-(2H)-indole] (SP1822), was investigated in single-component LB films. The morphological changes accompanying the photochromic reaction of SP…
We determine the structural data of seven of the polymorphs of ice (ice Ih, ice Ic, ice IX, ice II, ice VI, ice VII and ice VIII) from ab initio calculations. The dynamical properties have been analysed within the harmonic approximation via a finite-difference evaluation of dynamical matrices from atomic forces. Super…
We present ab initio quantum chemical embedded cluster calculations of Mn core-valence and $d\ensuremath{-}d$ transitions in ${\mathrm{LaMnO}}_{3}.$ The results are also important for the analysis of recent x-ray absorption and x-ray scattering experiments at the Mn K edge in ${\mathrm{LaMnO}}_{3}.$ We find that the f…
A series of poly(styrene- co -vinylphenol) (PSOH) copolymers were prepared and characterized. The miscibility and hydrogen bonding between the partially hydroxylated polystyrene with poly(ε-caprolactone) (PCL) blend were investigated by differential scanning calorimetry and Fourier transform infrared spectroscopy. The…
The effect of pressure on the $B\ensuremath{-}T$ phase diagram of $\ensuremath{\alpha}\ensuremath{-}(\mathrm{BEDT}\ensuremath{-}\mathrm{TTF}{)}_{2}\mathrm{KHg}(\mathrm{SCN}{)}_{4}$ is studied. The measured phase lines can be well described by a recent model of a charge-density wave system with varying nesting conditio…
Optical conductivity spectra $\ensuremath{\sigma}(\ensuremath{\omega})$ of a ${\mathrm{La}}_{3/2}{\mathrm{Sr}}_{1/2}{\mathrm{NiO}}_{4}$ single crystal were investigated over a wide photon energy range with variations of temperature and polarization. Strong anisotropies in phonon modes and electronic structures are obs…
Abstract Polyethylene‐ g ‐polyacrylamide membranes were prepared by graft polymerization of acrylamide into polyethylene films by preirradiation technique. The characterization and thermal behavior of membranes with different degrees of grafting were evaluated by density, X‐ray diffraction, thermogravimetric analysis,…
Systematic dc and ac magnetic susceptibility studies have been performed on single-phase ${\mathrm{LaCoO}}_{3}$ powder samples. Evidence is presented in support of the existence of ferromagnetic (FM1, FM2) and antiferromagnetic (AFM) interactions at low temperatures. FM1 and FM2 are ferromagnetic interactions that occ…
The formation of the sitting-atop (SAT) complexes of 5,10,15,20-tetraphenylporphyrin (H(2)tpp), 5,10,15,20-tetrakis(4-chlorophenyl)porphyrin (H(2)t(4-Clp)p), 5,10,15,20-tetramesitylporphyrin (H(2)tmp), and 2,3,7,8,12,13,17,18-octaethylporphyrin (H(2)oep) with the Cu(II) ion was spectrophotometrically confirmed in aque…
In this paper we present a review of the recent inelastic x-ray scattering (IXS) studies on the high-frequency collective dynamics in topologically disordered systems. At mesoscopic exchanged momenta ( Q ≈1-10 nm -1 ), these IXS studies allowed experimental demonstration of the existence in glasses of propagating acou…
The alternating-current (ac) conductivity σ(ω) and the dielectric permittivity of polyaniline doped with β-naphthalene sulphonic acid (NSA) have been extensively studied in the temperature range of 300 K to 80 K and in the frequency range of 500 Hz to 10 MHz. The ac conductivity follows a power law in frequency, σ(ω)∝…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTSynthesis and Characterization of a 2,1,3-Benzothiadiazole-b-alkyne-b-1,4- bis(2-ethylhexyloxy)benzene Terpolymer, a Stable Low-Band-Gap Poly(heteroaryleneethynylene)Carlito G. Bangcuyo, Una Evans, Michael L. Myrick, and Uwe H. F. B…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFunctionalization of [MoW5O19]2- with Aromatic Amines: Synthesis of the First Arylimido Derivatives of Mixed-Metal PolyoxometalatesYongge Wei, Meng Lu, Calida Fung-chi Cheung, Charles L. Barnes, and Zhonghua PengView Author Information Departments of Chemistry, Univers…
A mechanism to enhance hardness in multilayer coatings is proposed. Using the technologically important hard transition metal carbides as prototypes, although the principle is transferable also to other systems, we demonstrate, from first-principles calculations, that by suitable alloying the energy difference between…
In this paper the influence of UV irradiation on the luminescence quantum efficiency of nanocrystalline ZnS:Mn 2+ is studied. Samples passivated with poly(vinylbutyral) (PVB), poly(vinyl alcohol) (PVA), methacrylic acid (MA), and sodium polyphosphate (PP) and samples without passivating polymer were UV irradiated in a…