Shape‐Controlled Synthesis of Metal Nanostructures: The Case of Silver
Abstract For Abstract see ChemInform Abstract in Full Text.
Materials Literature
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First-principles study of the pressure effects onβ′−(BEDT−TTF)2AuCl2
We show a unique pressure effect on the electronic structure of a layered organic solid ${\ensuremath{\beta}}^{\ensuremath{'}}\text{\ensuremath{-}}{(\mathrm{BEDT}\text{\ensuremath{-}}\mathrm{TTF})}_{2}\mathrm{Au}{\mathrm{Cl}}_{2}$ by a theoretical study based on density functional theory. At ambient pressure, atomic a…
Lattice dynamics of single-walled achiralBC3nanotubes
The phonon dispersion relation and specific heat of single-walled ${\mathrm{BC}}_{3}$ nanotubes have been investigated using a force constant model. The obtained phonon dispersion relation of ${\mathrm{BC}}_{3}$ sheet reproduces well the experimental data. The tube-diameter dependent frequencies of both the radial bre…
Fermi surface of the organic superconductor(MDT−ST)(I3)0.417reconstructed by incommensurate potential
The effect of incommensurate potential on Fermi surface (FS), which loses any translational symmetry in the energy bands, is investigated in the organic superconductor $(\mathrm{MDT}\text{\ensuremath{-}}\mathrm{ST}){({\mathrm{I}}_{3})}_{0.417}$, where MDT-ST is $5H$-2-(1,3-dithiol-2-ylidene)-1,3-diselena-4,6-dithiapen…
Poly(D, L‐lactide‐co‐glycolide)/poly(ethylenimine) blend matrix system for pH sensitive drug delivery
Abstract Poly( D , L ‐lactide‐ co ‐glycolide) (PLGA) and poly(ethylenimine) (PEI) were blended and found to form a homogeneous pH sensitive matrix for drug release. Differential scanning calorimetry (DSC) studies of the PLGA/PEI blends showed a single glass transition temperature at all compositions. Fourier transform…
Independence of the brittle–ductile transition from the rubber particle size for impact‐modified poly(vinyl chloride)
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…
Electronic band structure, electron-phonon interaction, and superconductivity of (5,5), (10,10), and (5,0) carbon nanotubes
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…
Gated spin transport through an individual single wall carbon nanotube
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%…
Growth and characterization of well aligned densely packed IrO2nanocrystals on sapphire via reactive sputtering
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…
Coexistence of meandering and bunching of steps on vicinal surfaces
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…
Holographically generated twisted nematic liquid crystal gratings
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…
Synthesis and Characterization of Carbon‐Based Nanoparticles and Highly Magnetic Nanoparticles with Carbon Coatings
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…
Transition from crazing to shear deformation in ABS/PVC blends
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) complexes of an extended inherently chiral tris-bipyridyl cage
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…
Spiropyrans: Synthesis, Properties, and Application
Abstract For Abstract see ChemInform Abstract in Full Text.
Oxygen Permeability and Stability of Sr0.95Co0.8Fe0.2O3‐δ in a CO2‐ and H2O‐Containing Atmosphere.
Abstract For Abstract see ChemInform Abstract in Full Text.
Suspended architecture formation process of single-walled carbon nanotubes
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…
Electronic structure and vibrational spectra ofC2B10-based clusters and films
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…
Tight-binding modeling of thermoelectric properties of bismuth telluride
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…
Electronic structure of transition-metal impurities inp-type ZnO
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…