Materials Literature
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Low temperature magnetic and transport properties of the sol-gel derived Cd doped ${\mathrm{La}}_{0.7}{\mathrm{Ca}}_{0.3}{\mathrm{Mn}}_{1\ensuremath{-}x}{\mathrm{Cd}}_{x}{\mathrm{O}}_{3}(0\ensuremath{\leqslant}x\ensuremath{\leqslant}0.20)$ manganite system show ferromagnetism and cluster spin-glass behavior. Metal-ins…
Novel carbon nanostructures can serve as effective storage media for methane, a source of "clean energy" for the future. We have used Grand Canonical Monte Carlo Simulation for the modeling of methane storage at 293 K and pressures up to 80 MPa in idealized bundles of (10,10) armchair-type single-walled carbon nanotub…
Ionic core-shell dendrimers with an octacationic core have been applied as noncovalent supports for homogeneous catalysts. Catalytically active arylpalladium complexes, which bear a tethered sulfato group, were noncovalently attached to the ionic core-shell dendritic supports via a straightforward ion-exchange reactio…
We report the synthesis of tungsten oxide W 18 O 49 nanowires by thermal evaporation at low temperature without using catalysts. By placing tungsten powder in the high temperature zone at 650 °C and tungsten substrate in the low temperature zone at 400 °C of a tube furnace, W 18 O 49 nanowires with diameters of 10–50…
Extended branched networks of single-nanoparticle chains have recently been self-assembled from colloidal suspensions. In particular, gold nanoparticle linear chains and complex chain networks have revealed unique signatures of plasmon modes in their extinction spectra. In this Letter, we investigate theoretically the…
A solution phase method has been used to synthesize triangular and hexagonal Ni nanosheets with different edge lengths by controlling the reaction kinetics. This procedure is realized by introducing Fe(CO) 5 into the reaction system to slow the formation rate of Ni(0). The introduced Fe(CO) 5 exists as Fe(III) ions in…
A Comment on the Letter by Chang-Hwan Choi and Chang-Jin Kim, Phys. Rev. Lett. 96, 066001 (2006). The authors of the Letter offer a Reply.
Powder samples of the type I clathrate phases, with the proposed stoichiometry Ba 8 Al 16 Si 30 and Eu 2 Ba 6 Al 16 Si 30, were synthesized using direct reaction of stoichiometric amounts of the elements. Rietveld refinement of powder X-ray diffraction data is consistent with the clathrate type I structure. Compositio…
Although boron has been known for many years to be a successful dopant in bulk diamond, efficient doping of nanocrystalline diamond with boron is still being developed. In general, the location, configuration, and bonding structure of boron in nanodiamond is still unknown, including the fundamental question of whether…
Complete wetting of geometrically structured substrates by one-component fluids with long-ranged interactions is studied theoretically. We consider periodic arrays of rectangular or parabolic grooves and lattices of cylindrical or parabolic pits. We show that the midpoint interfacial heights within grooves and pits ar…
Abstract The one‐pot synthesis of core/shell quantum dots (QDs) represents an attractive alternative to conventional synthesis techniques, where the core CdSe QDs are first purified and then an epitaxial shell of the desired thickness is obtained by the slow addition of shell precursors to a solution of the purified Q…
Nanotube salts serve as initiators for the in situ polymerization of methyl methacrylate onto the surface of the nanotubes. The poly(methyl methacrylate)-grafted single-walled carbon nanotubes (SWNTs) are soluble in chloroform, tetrahydrofuran, and acetone. Atomic force microscopy images and Raman spectroscopy show th…
Isothermal crystallization kinetics of linear polypropylene (PP) and long‐chain branched (LCB) PPs were investigated on the basis of the Avrami theory. The Avrami exponents of LCB PPs are smaller than that of linear PP; moreover, they decrease with an increasing LCB level. The crystallization half‐time of LCB PP depen…
ADVERTISEMENT RETURN TO ISSUEPREVNoteControl of Temperature-Sensitive Properties of Poly(amidoamine) Dendrimers Using Peripheral Modification with Various Alkylamide GroupsYasuhiro Haba, Chie Kojima, Atsushi Harada, and Kenji KonoView Author Information Department of Applied Chemistry, Graduate School of Engineering,…
We report on the field emission properties of tungsten oxide nanowires grown on a tungsten tip and its emission performance in various vacuum conditions. Tungsten oxide (W 18 O 49 ) nanowires were grown by thermal chemical vapour deposition in a mixture of CH 4 and H 2 on an electrochemically sharpened tungsten tip. T…
The ligand-centered mixed-valence (LCMV) properties of two supramolecular complexes are reported: triangular prisms of the form ([Re(CO)3]2X)3-mu,mu',mu' '-[tPyTz]2, where X is 2,2'-bisbenzimidazolate (1) or a pair of benzylthiols (2), and tPyTz is tri-(4-pyridyl)-1,3,5-triazine. Cyclic voltammetry demonstrates that t…
Electronic devices primarily use electronic rather than ionic charge carriers. Using soft-contact lamination, we fabricated ionic junctions between two organic semiconductors with mobile anions and cations, respectively. Mobile ionic charge was successfully deployed to control the direction of electronic current flow…
The viscoelastic properties of phase‐separated poly(methyl methacrylate) (PMMA) and poly(styrene–co‐maleic anhydride) (SMA) blend systems have been investigated. It is shown that the samples of initial off‐symmetric and symmetric compositions show different characteristic viscoelastic properties, which are the reflect…
Recent measurements have suggested that the antiplasticizing effect of glycerol on trehalose can significantly increase the preservation times of proteins stored in this type of preservative formulation. In order to better understand the physical origin of this phenomenon, we examine the nature of antiplasticization i…
The ring-opening polymerization (ROP) of the cyclic phosphoester 2-ethoxy-2-oxo-1,3,2-dioxaphospholane (EEP) in tetrahydrofuran solution with co-initiation of stannous octoate and dodecanol yields poly(ethylene ethlyl phosphate) (PEEP) with defined linear molecular structure. NMR analyses reveal every molecule of dode…