Materials Literature
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Paramagnetic liquid crystalline complexes of the formula [LnL(LH)2][CF3SO3]2 have been synthesised, where LH is the ligand N-dodecyl-4-(3',4'-didodecyloxybenzoyloxy)salicylaldimine and Ln is a lanthanide metal. When compared with analogous nitrate complexes, the transition temperatures are rather low.
We succeeded in observing individual single-walled carbon nanotubes (SWNTs) using an atomic force microscope (AFM) in the tapping mode by paying attention to the preparation of both samples and AFM tips. To disentangle the bundles of SWNTs, we added a small amount of amine into N,N-dimethylformamide. To achieve a high…
Abstract Structural data have been obtained on the cation surroundings in multi-component silicate and borosilicate glasses using chemically selective spectroscopic and scattering methods, such as extended X-ray absorption and neutron scattering with isotope substitution (NSIS). Transition elements such as Ni or Ti ma…
A semiconducting pyrrole−styrene block copolymer film was electrochemically synthesized in nitromethane. The product polymer was confirmed to be a copolymer of pyrrole and styrene and not a composite or a blend of PPy and PSt through electrochemical, spectral, and dissolving experiments.
Radiation-induced absorption and luminescence are measured in the visible spectral region in H/sub 2/-loaded and as-drawn fibers with KU and KS-4V silicas in the core in the process of /spl gamma/-irradiation (/sup 60/Co-source). The induced absorption in H/sub 2/-loaded fibers is shown to be much lower than in as-dra…
This paper presents the modeling of different topologies of electric drive systems when the cable that connects the converter to the motor has a significant length. The long feeder together with converter harmonics decrease the performance of the motor. To correctly assess the voltage and the current throughout the dr…
Five acid forest soils of eastern Austria were used to study nickel and copper sorption at metal concentrations ranging over five orders of magnitude. Distribution coefficients were calculated, and the Langmuir equation was fitted to the experimental isotherm data. Exchange for mono- and divalent cations is considered…
The effect of thermodynamical equilibrium transfer of electrons between closed (Landau) orbits and magnetic field independent states near the Fermi surface on the magnetoquantum oscillations in quasi-two-dimensional (2D) metals is investigated. The general relationship between magnetization and chemical potential osci…
Abstract The crystallization kinetics of poly(ethylene terephthalate) was studied using constant cooling rate, isothermal and quenching experiments. A non‐isothermal crystallization kinetics equation based on a single mechanism was used to analyze the data. Different mechanisms of crystallization at low, intermediate,…
Transient absorption spectroscopy with femtosecond time resolution was used to probe the photochemical ring opening process of 3,3-diphenylnaphtho[2,1-b] pyran in solution. Analysis of the temporal evolution of the spectra from 0.4 ps to 100 ps has allowed us to detect and identify some of the intermediates involved i…
The numerous extraordinary properties of carbon nanotubes are now well known – as the other articles in this special issue emphasize – and it is clear that nanotubes differ from ordinary molecules and solids in many respects. In fact, nanotubes have an ambiguous identity: they have reasonably well defined structures –…
Abstract A sequence of interstratified illite-smectite (I-S) and illite in Paleozoic pelites and metapelites from the Iberian Range, Spain, was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The fine-grained matrix of diagenetic pelites is composed o…
This article reports on a technique for patterning diamond nanogrit which utilizes commercial ink-jet printer technology. Diamond nanogrit as small as 50 nm has been successfully printed onto substrates of glass, silicon, copper, and fused quartz. The technique has been used to demonstrate a quick and simple means to…
Bei der Umsetzung von YCl3 und Li2SO4 in verschweißten Goldampullen erhält man farblose Einkristalle von Y2(SO4)3. Nach Auskunft der Röngenstrukturanalyse kristallisiert die Verbindung orthorhombisch (Pbcn, Z = 4, a = 1273,97(13), b = 916,76(9), c = 926,08(7) pm, Rall = 0,0274). Die Kristallstruktur wird von [YO6]-Okt…
Singlewall carbon nanotube (SWNT) suspensions have been shown to be good optical limiters mainly because of their nonlinear scattering properties. In this paper, we report on a pump-probe experiment coupled with emission measurements for SWNT's in two solvents (water and chloroform). Time-resolved probe transmission w…
The crystal structure and electrical properties were investigated for (001)- and (116)-oriented SrBi2Ta2O9 (SBT) thin films deposited on (100) SrTiO3 and (100)SrRuO3∥(100)SrTiO3 substrates, and (110) SrTiO3 and (110)SrRuO3∥(110)SrTiO3 substrates, respectively. Both oriented SBT films were epitaxially grown with high c…
Many hydroxy-(hydrated) Cu 2+ oxysalt minerals, particularly Cu 2+ sulfates, are based on structural units that are variants of the [ M ϕ 2 ] N sheets of edge-sharing octahedra, where M is an octahedrally coordinated cation (including vacancies) and ϕ is an anion. Where ϕ = O 2− ,OH,Cl,H 2 O, the sheet can be consider…
The fatigue and hysteresis behaviour of oil palm wood flour (OPWF) filled natural rubber composites was studied. The stress at any strain decreased with increasing OPWF loading in the composites. As the filler loading increased, the poor wetting of the OPWF by the rubber matrix gave rise to poor interfacial adhesion b…
A quantitative model of a Si/SiO2 superlattice (SL) is developed and applied to Raman and photoluminescence (PL) measurements. By analyzing the experimental reflection spectra of Si/SiO2 SLs on Si and Al substrates, we obtained optical parameters of amorphous Si layers with thickness below 4 nm. Both refractive index…
Abstract A novel, continuous process, solid‐state shear pulverization (S 3 P), efficiently mixes blends with different component viscosities. Melt mixing immiscible polymers or like polymers of different molecular weight often requires long processing times. With a batch, intensive melt mixer, a polyethylene (PE)/poly…