Materials Literature
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A probabilistic risk analysis (PRA) for a high-level radioactive waste repository is very important since it gives an estimate of its health impacts, allowing comparisons to be made with the health impacts of competing technologies. However, it is extremely difficult to develop a credible PRA for a specific repository…
Water-soluble, cationic, anionic, and neutral polymers are used to form various repeat trilayer films via ionic self-assembly (ISA) and spin-assembly. These multilayer thin films assemble through physical entanglement, electrostatic, and/or H-bonding interactions. Spin assembly has the advantage over ISA in constructi…
Temperature dependence of azimuthal and zenithal anchoring energy coefficients of the nematic liquid crystal 4-n-pentyl-4(')-cyanobiphenyl on rubbed nylon is measured using dynamic light scattering. The method is based on observations of director fluctuations in a planarly aligned wedge cell, where the anchoring energ…
The sonochemical degradation of sodium dodecylbenzene sulfonate (SDBS) has been studied over a wide concentration range spanning the critical micelle concentration (CMC) of the surfactant. The rate of degradation of SDBS increased linearly with increasing concentration below the CMC of SDBS. Above the CMC, the degrada…
Modulated differential scanning calorimetry (MDSC) and fluorescence spectroscopy have been used to study the miscibility of methylsilsesquioxane (MSSQ)/poly(methyl methacrylate- co -(dimethylamino)ethyl methacrylate) [P(MMA- co -DMAEMA)] hybrid nanocomposites, which are promising candidates for spin-on, ultralow diele…
A series of 10 didodecanoylamides of alpha,omega-alkylidenediamines bridged by a straight carbon chain varying in length from 0 to 9 carbons was examined as possible gelator molecules of organic liquids to gain information on the relationships between the spacial arrangement of two amide groups in a molecule and their…
Structural refinements were performed on synthetic and natural Fe-Sb-oxides of MO 2 type according to the Rietveld method. The refinement in the P4 2 / mnm space group confirms that the synthetic phase (Fe 3 + Sb 5 + )O 4 , corresponding to squawcreekite, is characterised by a rutile-type structure. In contrast to the…
Chemical analysis (including light elements) of a Mn-rich tourmaline from a recently discovered locality near Eibenstein an der Thaya, Lower Austria, characterizes the sample as Mn-rich, Li-, and Fe-bearing olenite. Chemical analysis in combination with the crystal structure (a = 15.9325(5) A, c = 7.1308(4) A, R = 0.0…
CdTe:Mn was prepared by implantation of CdTe with 200 keV Mn ions with a dose of 5×1016 cm−2, which produced an insulating layer in the surface region. Ferroelectric characterization of the implanted sample revealed a clear hysteresis in its polarization–voltage curves. The remnant polarization of CdTe:Mn amounts to 0…
We consider the motion of a small droplet sliding under gravity down an inclined plane. Experimentally [see T. Podgorski, Thèse, Université Paris 6 (October 2000); T. Podgorski et al., Phys. Rev. Lett. 87, 036102 (2001)] it has been observed that such a droplet will develop an angular point in the contact line at its…
Preparation of poly( p -oxycinnamoyl) (POC) microspheres was examined by the reaction-induced phase separation of oligomers during the polycondensation of ( E )-4-acetoxycinnamic acid in various solvents. Polymerization in liquid paraffin yielded the microspheres having a smooth surface at 270−330 °C, of which the ave…
The microphase composition of poly(butylene terephthalate)- block -poly(tetramethylene oxide) multiblock (PBT- block -PTMO) copolymers with varying content of PTMO soft block and varying block length was studied by 1 H NMR transverse magnetization relaxation ( T 2 relaxation) and 1 H 2D DQ NMR experiments under fast M…
Far-infrared (FIR) reflection measurements have been employed to study the long-wavelength optical phonon properties in cubic MgZnO thin films grown by reactive electron beam evaporation on sapphire substrates. The frequencies of the optical phonons with T2 symmetry are obtained by calculating the FIR reflection spect…
The reactive ion etching of poly(ethylene terephthalate) using various gas compositions was examined. A radio frequency power supply operating at 30 kHz was used to produce plasmas from the following gases and 50:50 gas mixtures: Ar, N 2, O 2, Ar−N 2, Ar−O 2, and N 2 −O 2 . Exposure times were typically 10, 20, and 30…
The Pt hillock in a Pt/Ti electrode stack has been the main concern in ferroelectric random access memory due to the reliability problem. The origin of the hillock formation is the compressive stress, and the main mass transport mechanism for hillock formation is the grain boundary diffusion for thin films with a colu…
The 1 H NMR relaxivity of o - and p -dinitroxide-substituted phthalate esters and a series of nitroxyl-functionalized poly(propylene imine) dendrimers has been measured in acetonitrile and methanol. Studies of dinitroxide relaxivity indicate that the electron exchange rate has only a small effect on relaxivity. Outer-…
Dendronized polymers (DenPol's) up to generation 3 were equipped with NCN−palladium and −platinum pincer complexes at their peripheries, using active ester chemistry. The palladium compounds catalyze the aldol condensation of benzaldehyde with methyl isocyanoacetate and show a generation-independent activity.
We present the first examples of ordered macroporous carbons (OMCs) containing metal nanoparticles and hierarchical pore structures. The sol−gel polymerization of formaldehyde with potassium 2,4-dihydroxybenzoate within the void spaces of an ordered array of polystyrene spheres, followed by ion exchange, template remo…
Experimental results demonstrating Peltier cooling below 10 K are reported, using crystals of the thermoelectric cerium hexaboride (CeB6). Direct measurements of the Peltier cooling showed δT up to ∼0.2 K in magnitude at T∼4–5 K. All three kinetic parameters: resistivity (ρ), heat conductivity (k), and Seebeck coeffic…
A new class of electrochemical sensors, namely, electrodes based on diamond paste, was designed using monocrystalline diamond (natural diamond 1 microm and synthetic diamond, 50 microm (synthetic-1) and 1 microm (synthetic-2)) powder and paraffin oil. The characterization of the electrodes was performed using cyclic v…