Materials Literature
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The method of direct current hot-cathode plasma chemical vapour deposition has been established. A long-time stable glow discharge at large discharge current and high gas pressure has been achieved by using a hot cathode in the temperature range from 1100°C to 1500°C and nonsymmetrical configuration of the poles, in w…
We have performed a Mössbauer spectral analysis of nanocrystalline metastable P 6/ mmm SmTi(Fe 1−x Co x ) 9 , correlated with structural transformation towards its equilibrium derivative I 4/ mmm SmTi(Fe 1−x Co x ) 11 . The Rietveld analysis shows that the 3g site is fully occupied, while the 6ℓ occupation is limited…
We investigate the formation dynamics of self-assembled polyelectrolyte multilayers on glass substrates by in situ and ex situ second harmonic generation (SHG) measurements and atomic force microscopy (AFM). The time dependence of the SHG signal during the adsorption process is attributed to a time dependent surface p…
The polymerization of poly( p -oxybenzoyl) (POB) from p -acetoxybenzoic acid was examined in the presence of three kinds of aromatic monofunctional compounds such as p -hexyloxybenzoic acid (HOBA), p -decyloxybenzoic acid (DOBA) and p -octadecyloxybenzoic acid (OOBA) under unstoichiometric polymerization conditions. P…
4-Hydroxybenzoyl-coenzyme A (4-HBA-CoA) thioesterase catalyzes the hydrolysis of 4-HBA-CoA to 4-hydroxybenzoate and CoA. X-ray crystallographic analysis of the liganded enzyme has shown that the benzoyl thioester and pantetheine moieties of the substrate ligand are bound in a narrow crevice while the nucleotide moiety…
[Fe(pic) 3 ]Cl 2 ·EtOH (pic = 2-picolylamine) is a spin-crossover compound that can be converted from the low-spin state to the high-spin state at temperatures below the thermal transition temperature by way of light irradiation in the visible part of the electromagnetic spectrum. For this compound, the question regar…
A microscopic expression for the divergence of the stress tensor is derived for inhomogeneous suspensions of rigid colloidal particles of arbitrary shape. This expression is valid for arbitrary large gradients in the shear rate, concentration, and orientational order parameters. The corresponding Navier–Stokes equatio…
Copolymers containing ethylene carbonate (EC) and ε-caprolactone (CL)/ l -lactide (LA) units of different compositions were synthesized by the ring-opening polymerization method using the SmI 2 /Sm initiator system. EC was non-homopolymerizable using the same initiator. A maximum of 19 mol % EC was incorporated into t…
Zn 1- x Mg x O films have been grown on silicon at various substrate temperatures by pulsed laser deposition. The structural and photoluminescent properties of films as a function of substrate temperature have been studied. The optimized substrate temperature is 650°C. The x-ray diffraction spectra indicate that the f…
The selective separation of ethanol from ethanol–water mixtures by ultrasonic atomization has been reported recently by Sato, Matsuura, and Fujii [J. Chem. Phys. 114, 2382 (2001)]. In that work, experimental data were reported that confirmed the generation of an ethanol-rich droplet mist and attempted to explain the s…
We report on the fabrication and characterization of fully organometallic multilayer thin films, composed of poly(ferrocenylsilane) polyanions and polycations. These polyions were deposited electrostatically onto a variety of substrates including quartz, silicon, gold, and hydrophilic/hydrophobically patterned substra…
A systematic study of the binary melting point phase diagram and ternary solubility phase diagram of the enantiomeric mandelic acid species in water has been undertaken. The melting point phase diagram of the system (+)-/(−)-mandelic acid was determined by means of thermal analysis. In agreement with previous observat…
The resistivity, ρ, of ceramic La 1−x Ca x Mn 1−y Fe y O 3 with x = 0.3 and y = 0.0–0.09 is found to obey, between a temperature T v ≈ 310–330 K and the ferromagnetic-to-paramagnetic transition temperature, T C = 259–119 K (decreasing with y ), the Shklovskii–Efros-type variable-range hopping conductivity law, ρ( T )…
The fabrication of high quality, robust, and photoactive ITO electrodes is reported. Electrostatic and van der Waals interactions have been used for the step-by-step deposition of layers containing a fullerene−porphyrin dyad as the active layer. The new electrodes give rise to improved light harvesting features in the…
We show that, contrary to the prevailing perception, dislocations can become more mobile by zipping together to form junctions. In a series of direct atomistic simulations, the critical stress to move a junction network in a [110] plane of bcc molybdenum is found to be always smaller ( approximately 50%) than that req…
The structure and oxidation state of emeraldine base polyaniline (PANI) in N -methylpyrrolidinone solutions that have been heated to 120−190 °C have been characterized by solid-state NMR, UV/vis, FTIR, and GPC. The spectroscopic studies reveal that the polymer is completely converted to its fully reduced leucoemeraldi…
Nanostructuring silicon is an effective way to turn silicon into a photonic material. In fact, low-dimensional silicon shows light amplification characteristics, non-linear optical effects, photon confinement in both one and two dimensions, photon trapping with evidence of light localization, and gas-sensing propertie…
Inert gas condensation (IGC) has been employed to produce nanoparticles of the low-temperature combustion catalyst CuO x /CeO 2 . For the first time we have used a multiple heating crucible setup to tailor various morphologies over the whole compositional range (2−98% Cu). The factors that control the growth, structur…
A binary oxide, polycrystalline V 2 O 5, has been demonstrated to exhibit visible-light photochromism virtually for the first time. The oxide turns blue-black upon irradiation with visible laser light (514.5 nm) in air due to photoreduction of V 5+, and this effect is confirmed to be irradiation-induced, not heat-indu…
In this paper we present second harmonic generation (SHG) experiments designed to confirm the mechanism and quantify the transformation kinetics of the β–δ solid state phase transition in the organic nitramine molecule octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX). The β phase adopts a centrosymmetric crystal…