Materials Literature
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The interaction of a propagating wave packet (carrier frequency $\ensuremath{\omega}$, wave number $k)$ with nonadiabatic parametric pumping, localized in a region of size the order of the carrier wavelength $L\ensuremath{\sim}\ensuremath{\lambda}=2\ensuremath{\pi}/k$, is studied experimentally in a system of dipolar…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCrystalline Structural Change of Bacterial Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with Narrow Compositional DistributionShino Yamada, Yi Wang, Naoki Asakawa, Naoko Yoshie, and Yoshio InoueView Author Information Department of Biomolecular Engineering, Tokyo Institute of T…
A new feature of glass-forming liquids, i.e., long-range density fluctuations of the order of 100 nm, has been extensively characterized by means of static light scattering, photon correlation spectroscopy and Rayleigh-Brillouin spectroscopy in orthoterphenyl (OTP) and 1,1-di(4(')-methoxy-5(')methyl-phenyl)-cyclohexan…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCrown-Linked Porphyrin SystemsSandhya A. Duggan, Gary Fallon, Steven J. Langford, Vei-Lin Lau, Jacqueline F. Satchell, and Michael N. Paddon-RowView Author Information School of Chemistry, Monash University, Clayton, Victoria, Australia 3800, and School of Chemistry, University…
Abstract The instrumented Izod and Charpy tests were performed on the sawdust–polypropylene (PP) composites to study the nature of impact resistance in the thermoplastic wood composites. The notched Izod strength was found to increase with filler content in composites containing the Maleic–anhydride–grafted PP (MAPP)…
The potential use of polymer light-emitting devices is ultimately limited by their low quantum efficiency as well as by their poor stability against oxygen and moisture. To simultaneously solve these drawbacks, light-emitting devices using the polymer/layered silicate nanocomposite with good gas-barrier properties wer…
Abstract The paper presents the theory and the numerics of a thermodynamically consistent formulation of gradient plasticity at small strains. Starting from the classical local continuum formulation, which fails to produce physically meaningful and numerically converging results within localization computations, a the…
We report a quasielastic light scattering study of the dynamics of large latex probe particles (R=225 nm) in gelatin solution undergoing gelation. We show that by focusing on the short-time and long-time behavior of the autocorrelation function, it is possible to simply interpret out data in terms of the divergence of…
[see structure]. A novel aromatic isomer of 5,10,15,20-tetra(p-tolyl)-21,23-dithiaporphyrin (S2TTP) with an inverted pyrrole ring, 5,10,15,20-tetra(p-tolyl)-2-aza-21-carba-22,24-dithiaporphyrin (S2CTTP), and 5,10,15,20-tetra(p-tolyl)-25,27-dithiasapphyrin (25,27-S2TTSH), have been obtained by a condensation of 2,5-bis…
Abstract In the present article, we report the chemical synthesis and characterization of poly(aniline‐ co ‐fluoroaniline) [poly(An‐FAn)]. The copolymerization of aniline and 2‐fluoroaniline was carried out by chemical method in acidic medium. The characterization of poly(aniline‐ co ‐fluoroaniline) was done using FTI…
The frequency- and momentum-dependent dielectric function $ε{(\bf q,ω)}$ as well as the energy loss function Im[-$ε^{-1}{(\bf q,ω)}$\protect{]} are calculated for intermetallic superconductor $MgB_2$ by using two {\it ab initio} methods: the plane-wave pseudopotential method and the tight-binding version of the LMTO m…
The friction between the walls of multi-wall carbon nanotubes is shown to be extremely low in general, with important details related to the specific choice of the walls. This is governed by a simple expression revealing that the phenomenon is a profound consequence of the specific symmetry breaking: super-slippery sl…
We report observation of substantial thermal relaxation in single crystal of charge ordered system Pr$_{0.63}$Ca$_{0.37}$MnO$_3$ in an applied magnetic field of H = 8T. The relaxation is observed when the temperature is scanned in presence of a magnetic field in the temperature interval $T_{MH}
The paper discusses local porosity theory and its relation with other geometric characterization methods for porous media such as correlation functions and contact distributions. Special emphasis is placed on the charcterization of geometric observables through Hadwigers theorem in stochastic geometry. The four basic…
There is widespread interest in the search for materials that would allow the fabrication of more efficient thermoelectric devices for cooling and power generation applications. Here, we report a large increase in the thermoelectric power of p-doped antimony bismuth telluride alloys upon pressure tuning under nonhydro…
Studies of solid-state structures under different crystallization conditions, melting behavior, and crystal growth kinetics are reported for biodegradable aliphatic poly(butylene succinate) (PBS) and its random copolyesters of poly(butylene succinate-co-14 mol %ethylene succinate) [P(BS-co-14 mol %ES)] and poly(butyle…
The design of artificial models of the processes of biomineralization has resulted in the union of inorganic materials research and supramolecular organic chemistry. Recent work in this field of bioinspired synthesis of composite organic/inorganic materials is reviewed and prospects for the future are discussed. Atten…
A two-sublattice peudospin model with distance-dependent interaction parameters is constructed for the ferroelectric phase transition at 307 K and for the isomorphous anomaly at 180 K in pentakis (methylammonium) undecachlorodibismuthate (III) $({\mathrm{CH}}_{3}{\mathrm{NH}}_{3}{)}_{5}{\mathrm{Bi}}_{2}{\mathrm{Cl}}_{…
Two series of trends in negative pressure with cavitation in water were observed by the Berthelot method using single- and poly-crystalline molybdenum tubes sealed with single-crystalline copper plugs by repeating runs of temperature cycles at rates of 70-100 cycles/day between 50 and 98 °C, where a run means successi…
Using X-ray data, the determination of the cation distribution in crystals becomes problematic as a result of parameter correlations in the structure refinements. To circumvent the problem, a new refinement strategy (LOT analysis) was proposed by Kroll et al. [ Eur. J. Mineral. (1997), pp. 705–734] and successfully ap…