Materials Literature
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Abstract A series of acrylic impact modifiers (AIMs) with different particle sizes ranging from 55.2 to 927.0 nm were synthesized by seeded emulsion polymerization, and the effect of the particle size on the brittle–ductile transition of impact‐modified poly(vinyl chloride) (PVC) was investigated. For each AIM, a seri…
The electronic band structure, electron-phonon interaction, and superconducting transition are investigated for the (5,5), (10,10) armchair and (5,0) zigzag single walled carbon nanotubes (SWCNT). While the electron-phonon interaction and superconducting transition temperature are very small in (5,5) and negligibly sm…
Hysteretic switching in the magnetoresistance of short-channel, ferromagnetically contacted individual single wall carbon nanotubes is observed, providing strong evidence for nanotube spin transport. By varying the voltage on a capacitively coupled gate, the magnetoresistance can be reproducibly modified between +10%…
Well aligned densely packed IrO2 nanocrystals (NCs) have been grown on sapphire (SA) substrates with different orientations by reactive magnetron sputtering using an Ir metal target. The surface morphology, structural and spectroscopic properties of the as-deposited NCs were characterized using field-emission scanning…
We simulate morphology and its evolution of vicinal surfaces in epitaxy by using the phase-field model. For usual parameters of Cu vicinal surfaces, a pure in-phase meandering pattern consistent to the experimental images is obtained. Nevertheless, vicinal surfaces grow into more complex hierarchy for a small kink ene…
A reflection holographic method is introduced to fabricate an electro-optically tunable twisted nematic (TN) liquid crystal (LC) grating, forgoing the geometrical drawing. The photoisomerization process occurring on the LC alignment layers of an LC cell in the reflection holographic configuration gives a control over…
Abstract The metal carbides Li 2 C 2 , NaHC 2 , and CaC 2 , as well as acetylene, have been decomposed thermally and by metathesis reactions with selected transition‐metal halogenides as catalyst precursors in the temperature range of 550–1000 °C. All reactions have been performed in selected salt fluxes which dissolv…
Abstract ABS/PVC blends were prepared over a range of compositions by mixing PVC, SAN, and PB‐ g ‐SAN. All samples were designed to have a constant rubber level of 12 wt % and the ratio of total‐SAN to PVC in the matrix of the blends varied from 70.5/17.5 to 18/80. Transmission electron microscope and scanning electro…
Manganese(II), iron(II), cobalt(II), and copper(II) derivatives of two inherently chiral, Tris(bipyridyl) cages (L and L') of type [ML]-(PF(6))(2)(solvent)(n) and [FeL'](ClO(4))(2) are reported, where L is the hexa-tertiary butyl-substituted derivative of L'. These products were obtained by using the free cage and met…
Abstract For Abstract see ChemInform Abstract in Full Text.
Abstract For Abstract see ChemInform Abstract in Full Text.
The formation processes of suspended structures and bundles of single-walled carbon nanotubes (SWNTs) are directly observed by in situ scanning electron microscopy during chemical vapor deposition of SWNTs on a patterned specimen. SWNTs exhibit lively movements during extension from micropillar patterns, resulting in…
The electronic structure, total energy, and vibrational properties of ${\mathrm{C}}_{2}{\mathrm{B}}_{10}{\mathrm{H}}_{12}$ (carborane) molecules and ${\mathrm{C}}_{2}{\mathrm{B}}_{10}$ clusters formed when the hydrogen atoms are removed from carborane molecules are studied using density functional methods and a semiem…
A parameterized orthogonal tight-binding model with sp3d5s* orbitals, nearest-neighbor interactions, and spin-orbit coupling is developed for bismuth telluride (Bi2Te3) and used to study its thermoelectric properties. Thermoelectric transport coefficients and figures of merit for n-doped and p-doped Bi2Te3 are calcula…
The self-interaction-corrected local spin-density approximation is used to investigate the ground-state valency configuration of transition metal $(\mathrm{TM}=\mathrm{Mn},\mathrm{Co})$ impurities in $p$-type ZnO. Based on total energy considerations, we find a stable localized ${\mathrm{TM}}^{2+}$ configuration for a…
In the absence of standard single-wall carbon nanotube samples with a well-known (n,m) population, we provide both a photoluminescence excitation (PLE) and resonance Raman scattering (RRS) analysis that together can be used to check the calculations for PLE and RRS intensities for carbon nanotubes. We compare our resu…
Zinc-blende structured MnAs epiaxial films with half metallic characteristics were grown on GaAs (100) substrates. The formation of the zinc-blende structured MnAs on GaAs was made possible via introduction of a strained yet epirelated InAs intermediate layer, the thickness of which was found critical for enabling the…
Particle concentration is a dominant control parameter for colloids and other soft matter systems. We demonstrate a simple technique, "dielectrophoretic equilibrium," implemented as an "electric bottle," a planar capacitor in a larger volume. The uniform field in the capacitor traps particles in this force-free region…
Abstract We have synthesized a polyhedral oligomeric silisesquioxane (POSS) derivative containing eight acetoxystyryl functional groups [octa(acetoxystyryl)octasilsesquioxane (AS‐POSS)] and then blended it with phenolic resin to form nanocomposites stabilized through hydrogen bonding interactions between the phenolic…
Single-crystalline AlZnO nanomaterials were synthesized through a proposed alloy-evaporation deposition method at the low temperature of 550°C by thermal chemical vapor deposition. Transmission electron microscopy images show that AlZnO nanowires, or nanowire/nanotube junction structures, can be synthesized where the…