Materials Literature
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Dense liquids above their glass transition exhibit spatially heterogeneous dynamics in which regions within the liquid exhibit enhanced or diminished mobility relative to the average on some time scale. Substantial evidence suggests that these regions are confined to nanoscopic sizes at temperatures close to the mode…
Abstract A detailed analysis of the LaBGeO 5 single crystal vibration spectra has been carried out. The lattice vibration calculation based on a short‐range model potential function provides the theoretical background of this study. The model function parameters are taken from ab initio quantum mechanic calculations o…
Abstract A new microencapsulation technique is presented in which cholesteryl nonanoate (CN)/poly(methyl methacrylate) (PMMA) microcapsules are produced by the induction of phase separation between CN and PMMA within the droplets during the polymerization. The concentration of CN is the most important factor determini…
The electrical resistivity, Hall effect, and magnetoresistance of ${\mathrm{Mg}}_{2}{\mathrm{NiH}}_{x}$ $(0<x<4)$ films are investigated as a function of temperature, between 2 K and 280 K and magnetic fields up to 7 T. The overall features exhibited by the electrical resistivity $\ensuremath{\rho}$ and the char…
Although it has long been known that the classical notions of capacitance need modification at the nanoscale, in order to account for important quantum effects, very few first-principles investigations of these properties exist for any real material systems. Here we present the results of a large-scale ab initio inves…
We introduce a new method for building nanocrystal flash memory devices that achieves precise control of nanocrystal size and position. Nanocrystal dimensions are defined via polymer self assembly, facilitating device scaling. Devices exhibit low voltage memory operation with promising retention and endurance properti…
Molecular mechanics/dynamics computer simulations are used to explore the atomic scale structure and to predict binding energy values for polymer/clay nanocomposites based on random poly(butylene terephtalate-co-thiodiethylene terephtalate) copolyesters, montmorillonite and several, different organic surfactant. Our r…
Abstract A novel two‐dimensional organic−inorganic hybrid vanadate complex [{Co III (phen) 2 } 2 V 8 O 23 ] has been hydrothermally synthesized and characterized by elemental analyses, IR spectroscopy, XPS spectroscopy, TG analysis and single‐crystal X‐ray diffraction. The single‐crystal X‐ray diffraction analysis rev…
We have shown that a semiconducting single-wall carbon nanotube (SWNT) can be covered uniformly by titanium atoms and form a complex but regular atomic structure. The circular cross section changes to a squarelike form, and the system becomes metallic with high state density at the Fermi level and with high quantum ba…
In this paper, we describe the comparison between C.P.N and B.P.N, for magnetic hysteresis modeling.
This paper presents a 90 nm generation and 300 mm wafer size interconnect technology with 7 layers of Cu metallization and low k ILD. Carbon doped oxide (CDO) low k ILD is used to achieve > 20% inter- and intra-layer capacitance improvement and 25-30% RC improvement over 130 nm generation SiOF interconnect process wit…
In 1997 a FRP hot stick flashed over during live line work at 550 kVac. A rigorous maintenance program was instituted and all FRP hot sticks used in live line work must now withstand an annual dielectric test at 105 kVdc per 305 mm with the surface wet consistent with IEEE Std 978. More frequent electrical tests are m…
Abstract We report the synthesis of a water‐soluble diblock copolymer composed of polysulfonic diphenyl aniline (PSDA) and poly(ethylene oxide) (PEO), which was prepared by reacting an amine‐terminated PSDA and tosylate PEO (PEO‐Tos). First, a HCl‐mediated polymerization of sulfonic diphenyl aniline monomer with the f…
Abstract Three novel oxamidato‐bridged complexes incorporating a macrocyclic oxamide of formula [(CuL) 3 {CuL(C 2 H 5 OH)}Eu(H 2 O)](ClO 4 ) 3 ·1.5H 2 O ( 1 ), [(CuL) 3 {CuL(C 2 H 5 OH)}Tb(H 2 O)](ClO 4 ) 3 ·2H 2 O ( 2 ) and [(NiL) 5 Sm](ClO 4 ) 3 ·2H 2 O ( 3 ) (CuL and NiL, H 2 L = 2,3‐dioxo‐5,6,14,15‐dibenzo‐1,4,8,1…
Abstract Zn−Al layered double hydroxides (LDHs) intercalated by ferrocenecarboxylate (FcCOO) and 1,1′‐ferrocenedicarboxylate [Fc(COO) 2 ] anions have been prepared by co‐precipitation from aqueous solution. The Zn/Al ratio in the final materials was in the range of 1.8−1.9. Powder X‐ray diffraction (XRD) indicates tha…
Recent experiments have shown that multi-phase epilayers may self-organize into ordered nanoscale patterns on a solid substrate. In this paper, we present a phase field model for the self-assembly of three-phase epilayers. Nanoscale patterns are developed by two competing actions: coarsening due to phase boundary ener…
Abstract A new synthetic route to 2,2′,3,3′‐BTDA (where BTDA is benzophenonetetracarboxylic dianhydride), an isomer of 2,3′,3′,4′‐BTDA and 3,3′,4,4′‐BTDA, is described. Single‐crystal X‐ray diffraction analysis of 2,2′,3,3′‐BTDA has shown that this dianhydride has a bent and noncoplanar structure. The polymerizations…
Media with negative refractive index (NRI) are expected to exhibit properties that are unusual compared to materials with a positive index of refraction. However, until recently, these properties were not experimentally observed, since no NRI material occurs naturally. Periodic structures with NRI have been constructe…
This study examines the surface-assisted photoalignment effect of dye-doped liquid-crystal films having a homogeneous alignment. Observations made using a polarizing optical microscope, a scanning electronic microscope, and an atomic force microscope confirm that the morphology of laser-induced surface-adsorbed dyes a…
Abstract Seven new manganese( II , III , IV ) pyridinecarboxylate compounds (Et 4 N)[MnCl 2 (pic) 2 ] ( 1 , Hpic = picolinic acid) [MnCl(pic) 2 (H 2 O)]·H 2 O ( 2 ), [MnCl(pic)(H 2 O) 2 ] n ( 3 ), [Mn(pic) 2 ] n ( 4 ), [MnCl(pic)] n ( 5 ), [MnCl 2 (4‐C 5 H 4 NHCOO)] n ( 6 ) and [Mn 2 O 2 (pic) 4 ] ( 7 ) were synthesiz…