Materials Literature
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We measure the high-temperature thermoelectric properties of the Na x CoO 2-δ single crystal for the first time. The Na x CoO 2-δ single crystals are prepared by a flux technique, and the resulting flaky single crystals are very thin on the c -axis. The in-plane electrical resistivity (ρ), the thermoelectric power ( S…
We present a 3ω method for simultaneously measuring the specific heat and thermal conductivity of a rod- or filament-like specimen using a way similar to a four-probe resistance measurement. The specimen in this method needs to be electrically conductive and with a temperature-dependent resistance, for acting both as…
A very short processing time for making well-organized multilayer films can be achieved employing the novel spin self-assembly method described in this paper. The authors elaborate on the advantages of this method versus conventional self-assembly methods for the fabrication of multilayer polyelectrolyte films. The Fi…
The glass transition temperatures ( T g 's) of ultrathin films (thickness 80−18 nm) of polystyrene (PS) and poly(methyl methacrylate) (PMMA) were measured on surfaces with interfacial energies (γ SL ) ranging from 0.50 to 6.48 mJ/m 2 . The surfaces consisted of self-assembled films of octadecyltrichlorosilane (OTS) th…
The three-dimensional polymeric compounds [Fe(pz)M(CN)4]·nH2O (pz = pyrazine; M = Ni(II), Pd(II), and Pt(II)) have been synthesized and characterized. They undergo strong cooperative spin transitions, large hysteresis loops, and dramatic color changes upon spin conversion. The two-dimensional homologues [Fe(py)2M(CN)4…
The goal of this article is to provide an updated and in-depth review of some of the most exciting and important developments in the processing and properties of carbon nanotubes. Nanotubes can be formed in various structures using several different processing methods. The synthesis methods used to produce specific ki…
We report the band gaps of rodlike CdSe quantum dots with diameter varying from 3.0 to 6.5 nm and length from 7.5 to 40 nm. A qualitative explanation for the dependence of band gap on width and length is presented.
If a rough surface is put in contact with a wetting liquid, the roughness may be spontaneously invaded depending on the surface pattern and the wetting properties of the liquid. Here, we study the conditions for observing such an imbibition and present practical achievements where the wetting properties of the surface…
We have demonstrated large-scale production (10 g/day) of high-purity carbon single-walled nanotubes (SWNTs) using a gas-phase chemical-vapor-deposition process we call the HiPco process. SWNTs grow in high-pressure (30–50 atm), high-temperature (900–1100 °C) flowing CO on catalytic clusters of iron. The clusters are…
Degradation of a low-density polyethylene (LDPE)/linear low-density polyethylene (LLDPE)/high-density polyethylene (HDPE) blend having different weight ratios of LLDPE (10–35 wt%) and HDPE (40–65 wt%) with fixed percentage of LDPE (25 wt%) was studied by aging the film samples at 55, 70, 85, and 100°C in air. Reaction…
The thermogravimetry (TG) and derivative thermogravimetry (DTG) were used to study the drying kinetics of the paddy. TG experiments were carried out at different heating rates (1, 3, 10 K/min) to study the drying kinetics. The Activation energy and pre exponential factors from the Arrhenious equation were calculated f…
SUMMARY A new species of Cocconeis has been found growing on the green seaweed Caulerpa racemosa (Forsskal) J. Agardh var. laete-virens (Montagne) Weber van Bosse from Shikine Island in the Izu Islands on the Pacific coast of Japan; we propose the name Cocconeis shiki-nensis Hid. Suzuki and describe the species by lig…
The sonochemical destruction of binary mixtures of chloroform and carbon tetrachloride in aqueous solution at 30 kHz has been studied. The influences of initial concentration, bicarbonate/chloride, and acoustical intensity on the destruction rates have been observed. It was found that the destruction of the two compou…
This paper deals with the equations in a phase-field model with special terms coupling the heat equation and the equation of phase. A finer control of latent heat release together with a gradient coupling term in the phase equation are introduced as a consequence of an extensive numerical work with models of phase tra…
KOH-impregnated activated carbon (K-IAC) was studied as a NO x adsorbent. When adsorbing NO 2 /air to K-IAC, as the concentration increases, the removal efficiency relatively decreases because the function of the selective adsorption site for NO x is lost faster. By using AES/SAM and ToF-SIMS, we examined the chemical…
An aromatic poly(ether-ketone) derived from 4,4′−(hexafluoroisopropylidene)-diphenol and 4,4′-difluorobenzophenone has been sulfonated by using chlorosulfonic acid in 1,2-dichloroethane, in the presence of trimethylchlorosilane. The resulting modified polymers had different degrees of sulfonation depending on the reac…
Polyurethane (PU)/nitrile rubber (NBR) blends of different compositions were prepared by a combination of solution blending and mastication process. The thermal, mechanical, dynamic mechanical, and morphological properties indicated synergistic behavior of the two components. Incorporation of NBR in PU showed an incre…
A Mollisol catena in highly calcareous parent material under semiarid conditions of southern Iran was studied to determine the effects of water table depth and its fluctuations on the organic carbon content of mollic epipedons, genesis of subsurface horizons, and mineralogical variations in these horizons. The soils f…
Osmotic dehydration kinetics of potato slices and cubes was studied using sugar syrup of different concentrations and temperatures. The initial concentration of sucrose was varied from 30 to 65%, and temperature was varied from 22 to 80°C. The equilibrium coefficients for solids ranged from 0.84 to 1.55, and for water…
SUMMARY Coscinodiscus wailesii Gran et Angst is a large centric diatom (280‐500 µm diameter) from marine phytoplankton, characterized by a cylindrical frustule with flat valvar surface, two marginal rings of rimoportulae on the mantle, and two macrorimoportulae. Cells from cultured and natural populations collected in…