Materials Literature
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We show that in strong (quantizing) magnetic fields "ordinary" free magnetic polaron in diluted magnetic semiconductors (of type $A^2MeB^6$, where Me=Fe, Mn) exists in the form of vortex lattice quite similar to that in type II superconductors (Abricosov vortex lattice). The region of external parameters (like externa…
Molecular dynamics computer simulations which employ the embedded-atom potential show that nanowires of gold exist as multishelled structures. We simulate double-walled gold nanowires and calculate the capacitance of a finite nanometer-size cylindrical capacitor. For the sizes for which multishelled nanowires appear i…
Dipalmitoyldiphosphatidic acid (DPPA), dipalmitoyldiphosphatidylcholine (DPPC), and sphingosine were adsorbed onto polyelectrolyte coated colloids and capsules forming composite lipid−polyelectrolyte layers. The stepwise coating was performed either by adsorption of preformed vesicles onto the capsule surface or by a…
The heat capacity of crystalline poly(p-phenylenebenzobisoxazole) was measured below room temperature by adiabatic calorimetry. The standard thermodynamic functions (enthalpy, entropy, and Gibbs energy) were established and tabulated. The temperature dependence of the heat capacity was compared with those of polyethyl…
The fluorometric determination of the ground-state dissociation constant K d of a complex between ligand and titrant with 1: n stoichiometry in the presence and absence of excited-state association is discussed. This report extends the results of a previous study ( J. Phys. Chem. 1994, 98, 8585) where a 1:1 complex be…
The results of the complex study of samples of plasticized poly(vinyl chloride) (PVC) subjected to aging under model and climatic conditions or being in use for a long time (from 15 to 30 years at 253–301 K) studied by various techniques and the mechanism of their aging are presented in the article. Using the thermogr…
The chemical stability of 10% SF 6 -90% N 2 mixtures (100 kPa pressure) has been studied under sparking in the presence or absence of an organic insulator (teflon, kel'F, polyethylene, polypropylene, nylon, megelit), and/or added impurities (0.2% O 2 or H 2 O). The study was carried out experimentally and numerically.…
Nanoparticles of the diluted magnetic semiconductor Cd 0.991 Co 0.009 S, with diameters D between 3.5 and 29.5 nm, were studied by 113 Cd NMR spectroscopy. Two spectral features could be discerned: (1) a strong line corresponding to cadmium atoms that are removed more than four bonds from cobalt ions and (2) a set of…
A group contribution method is proposed to predict surface tension of liquid organic solvents. The proposed model is developed from a training set of 349 chemicals and validated with an external testing set of 44 chemicals. For the training set, the experimental surface tension values and the values fitted by this mod…
Recycled plastics, predominantly high-density polyethylene (PE), are being processed in the shape of dimension lumber and marketed as “plastic lumber.” One drawback to these products is their low creep resistance or high creep speed. The objective of this study was to examine the feasibility of reducing the creep spee…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTNew Kinetics of CaCO3 Nucleation and Microgravity EffectX. Y. Liu, K. Tsukamoto, and M. SoraiView Author Information Department of Physics, The National University of Singapore, 10 Kent Ridge Crescent, Singapore, and Faculty of Science, Tohoku University, Aramaki Aoba, Sendai 9…
This volume presents the acomplishments of over 85 internationlly renowned scientists whose work was influenced by Professor Wasan's groundbreaking research on interfacial phenomena at The Illinois Institute of Technology, Chicago.
Thermally induced phase separation was studied by the light scattering in polypropylene/methyl salicylate system. Data could be well fitted with the linear Cahn theory for spinodal decomposition (SD) in the early stage of phase separation. Characteristic properties of the early stage of SD, such as an apparent diffusi…
Reduction of AgNO 3 by sodium borohydride in the presence of quaternary ammnoium disulfide gave a stable aqueous dispersion of silver nanoballs. The obtained Ag nanoballs showed a strong plasmon absorption peak, indicating that they consisted of metal Ag, although the counteranion of the stabilizer was Br - . They are…
We demonstrate that it is possible to predict the semiconductor material properties, like lattice constant and band gap energy, from their chemical stoichiometries and fundamental element properties of the constituents. We use a correlation technique to show that band gap energy is strongly correlated to electronegati…
The point-by-point mapping of the surface-enhanced resonance Raman scattering (SERRS) and surface-enhanced Raman scattering (SERS) spectra obtained from Langmuir−Blodgett (LB) monolayers of bis( n -butylimido)perylene (BuPTCD) on silver island films are reported. Wide field global images of the SERRS signal are also d…
Cure characteristics and mechanical properties of natural rubber/reclaimed rubber blends were studied. The minimum torque values of the blends were lower than that of the gum compound. The (maximum–minimum torque) and scorch time decreased with increasing reclaim content. The cure rate of the blends were lower than th…
Thermal properties of natural rubber (NR)/styrene butadiene rubber (SBR) latex blends made from latex blending have been investigated using thermogravimetric analysis. It was found that the initial degradation temperature of NR is lower than SBR, and on addition of SBR, the degradation temperature is increased, indica…
On the basis of the structure refinements of neutron powder diffraction data, the Raman bands of A 2 La 2 Ti 3 O 10 (A = Na, K, and Rb) were successfully assigned. The existence of a linear A−O−Ti linkage along the c axis in this structure resulted in the strong dependence of their Raman bands on the nature of the A a…
The effect of time–temperature treatment on the mechanical properties and morphology of polyethylene–polypropylene (PE–PP) blends was studied to establish a relationship among the thermal treatment, morphology, and mechanical properties. The experimental techniques used were polarized optical microscopy with hot-stage…