Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTPolymerization of a Phosphonium Diene Amphiphile in the Regular Hexagonal Phase with Retention of MesostructureBradford A. Pindzola, Benjamin P. Hoag, and Douglas L. GinView Author Information Department of Chemistry, University of California Berkeley, California 94720…
The NaOH-catalyzed hydrolytic condensation of the reaction product between N -(β-aminoethyl)-γ-aminopropyltrimethoxysilane and phenyl glycidyl ether (PGE) was followed by matrix-assisted ultraviolet laser desorption/ionization time-of-flight mass spectrometry (UV-MALDI-TOF MS) and electrospray ionization time-of-fligh…
To study possible interactions between semiconductor nanocrystals, crystalline superstructures of Cd 17 S 4 (SCH 2 CH 2 OH) 26 have been studied spectroscopically. Interactions between the particles have been detected which are discussed with simple models including electronic and dipole−dipole interactions.
The temperature dependence of the thermal conductivity, low-field/high-field magnetization, and magnetic ac susceptibility under different hydrostatic pressures have been measured on single-crystal samples of ${\mathrm{LaMn}}_{1\ensuremath{-}x}{\mathrm{Ga}}_{x}{\mathrm{O}}_{3}.$ The data reveal a spin-glass phase in l…
No AccessStructure Formation in Polymeric FibersApr 2001Electrospinning and the Formation of NanofibersDavid R. Salem, Hao Fong, Darrell H. RenekerDavid R. Salem, Hao Fong, Darrell H. Renekerhttps://doi.org/10.3139/9783446456808.006SectionsAboutPDF ToolsAdd to FavoritesDownload CitationTrack CitationsCopy LTI LinkPDF…
Preface Crystallography Geometrical Representation of Crystals X-Rays Neutrons Diffraction Diffraction Peak Intensity and Measurement Two-Dimensional Recording Methods Phase Analysis Diffraction from More Complex Structures Stress Analysis Other Kinds of Materials Characterization Using Diffraction Appendix A: Some Cr…
We present evidence for the coexistence of ferromagnetic metallic and charge-ordered insulating phases in strained thin films of ${\mathrm{La}}_{0.67}{\mathrm{Ca}}_{0.33}{\mathrm{MnO}}_{3}$ at low temperatures. Such a phase-separated state is confirmed using low-temperature magnetic force microscopy and magnetotranspo…
In their Letter (Phys. Rev. Lett. 83, 5118 (1999)), den Brink, Khaliullin, and Khomskii proposed theoretically that the one-dimensional ferromagnetic zigzag chains in CE phase in half-doped manganites play an essential role in forming the orbital ordering, and, more surprisingly, the on-site Coulomb interaction U betw…
The structural properties of MgB2 superconductors have been analyzed by means of convergent-beam electron diffraction, high-resolution transmission-electron microscopy, and theoretical simulations. The MgB2 crystal has been identified to have a hexagonal structure with the space group of P6/mmm. Microstructural featur…
A mean-field model of ferromagnetism mediated by delocalized or weakly localized holes in zinc-blende and wurzite diluted magnetic semiconductors is presented. The model takes into account strong spin-orbit and $k\ensuremath{\cdot}p$ couplings in the valence band as well as the influence of strain upon the hole densit…
Abstract Thin films were blown from a composition of 75% linear low density polyethylene (LLDPE) and 25% LDPE. The LLDPE content was made up of different % of metallocene‐based and conventional octene‐based LLDPE. Tensile strength, dart impact strength, hot tack strength, heat seal strength, and the barrier properties…
Abstract Silicon oxycarbides undergo SiO and SiC bond redistribution when heated in an inert atmosphere above 900°C. This redistribution has a great influence on the mechanical, thermal, and oxidative stability properties of Blackglas™ ceramic. Based on a statistical method, three independent thermal redistribution…
Thin films of Ge/Al 2 O 3 were prepared using the pulsed laser deposition method. XRD and AFM confirmed that the structure consists of Ge nanoparticles embedded in amorphous Al 2 O 3 matrices. A blue PL from the films was found in the wavelength region of 400-550 nm with two distinct humps in the peak. The origin of t…
Abstract A series of isotactic polypropylenes were investigated to account for total defect content using xylene fractionation and carbon‐13 NMR experimental methods. The defects of interest were percent atactic content, copolymer content, and configurational defects. Experimental equilibrium melting temperatures were…
The new compounds K(2)TiCu(2)S(4), Rb(2)TiCu(2)S(4), Rb(2)TiAg(2)S(4), Cs(2)TiAg(2)S(4), and Cs(2)TiCu(2)Se(4) have been synthesized by the reactions of A(2)Q(3) (A = K, Rb, Cs; Q = S, Se) with Ti, M (M = Cu or Ag), and Q at 823 K. The compounds Rb(2)TiCu(2)S(4), Cs(2)TiAg(2)S(4), and Cs(2)TiCu(2)Se(4) are isostructur…
We have prepared ${\mathrm{La}}_{1\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{MnO}}_{3+\ensuremath{\delta}}$ single crystals for not only oxygen-deficient $(\ensuremath{\delta}<0)$ but also oxygen-excess $(\ensuremath{\delta}>0)$ regions. Although resistivity $\ensuremath{\rho}(T)$ is less sensitive to $\ensuremat…
Three cyano-bridged aqua(N,N-dimethylacetamide)(cyanoiron)lanthanide complexes were synthesized by the reaction of K3Fe(CN)6, Ln(NO3)3⋅6 H2O (Ln=Sm, Gd, Ho), and N,N-dimethylacetamide (DMA). The obtained complexes 1 – 3 exhibit different coordination geometries and crystal structures. The polymeric {[Sm(DMA)2(H2O)4Fe(…
Abstract Equilibrium sorption and uptake kinetics of n ‐butane and n ‐pentane in uniform, biaxially oriented, semicrystalline polyethylene terephthalate films were examined at 35 °C and for pressures ranging from 0 to approximately 76 cmHg. Sorption isotherms were well described by the dual‐mode sorption model. Sorpti…
Abstract The effects of interchange reactions on the solid‐state structure and mechanical properties of a 70/30 poly(ethylene terephthalate) (PET)/bisphenol A polycarbonate (PC) blend were studied. Increasing reaction levels were obtained by means of lower screw speeds in the extruder. The progressive production of co…
We measured the pressure dependence of the room-temperature infrared absorption spectrum of the pseudocubic ${\mathrm{La}}_{0.75}{\mathrm{Ca}}_{0.25}{\mathrm{MnO}}_{3}$ manganite. On increasing pressure up to 10 Gpa we observe the increase of a broad band associated with polaronic absorption, which partially screens t…