Materials Literature
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Carboxylic acid-functionalized SWNTs prepared via the reaction of an amino acid, NH2(CH2)nCO2H, with fluoronanotubes show similar levels of sidewall functionalization; however, the solubility in water is controlled by the length of the hydrocarbon side chain (i.e., n). The 6-aminohexanoic acid derivative is soluble in…
We first present the preparation of a new class of polyaniline (PANI)/titanium nitride (TiN) nanocomposites by in situ chemical polymerization in the presence of TiN nanoparticles. It was found that nanocrystalline TiN with an average diameter of approximately 20 nm incorporated and dispersed homogeneously within the…
Culture of A7r5 smooth muscle cells on a polyelectrolyte multilayer film (PEMU) can influence various cell properties, including adhesion, motility, and cytoskeletal organization, that are modulated by the extracellular matrix (ECM) in vivo. ECM contribution to cell behavior on PEMUs was investigated by determining th…
An easy and convenient method for the synthesis of cobalt and magnesium ferrite nanoparticles is demonstrated using liquid foams as templates. The foam is formed from an aqueous mixture of an anionic surfactant and the desired metal ions, where the metal ions are electrostatically entrapped by the surfactant at the th…
Coexistence of metallic and semiconducting carbon nanotubes has often been a bottleneck in many applications and much fundamental research. Single-walled carbon nanotubes (SWCNTs) were dissolved in HNO3/H2SO4 mixture to confirm differing reactivity between metallic (m) and semiconducting (s) SWCNTs. With HNO3/H2SO4 tr…
The effects of the polymerization temperature and of voltammetric cycling on the chain length and the resistivity of polypyrrole films are investigated. The studies provide further proof for the existence of at least two different types of polypyrrole, the so-called PPy I and PPy II. As the electropolymerization of co…
The replacement reaction between hydrophobized Ag nanoparticles and hydrophobized AuCl4- in toluene has been examined in detail. The conclusions obtained under our experimental conditions are different from those reported in the literature in three aspects: (1) a detectable contraction of the Ag nanoparticle sacrifici…
Abstract Nanodimensional pores of zeolite-Y (host) encapsulated Mn(II), Co(II), Ni(II), Cu(II), and Zn(II) complexes of unsaturated 16-membered octaaza–macrocycle (guest), 3,4,7,8,11,12,15,16-octamethyl-1,2,5,6,9,10,13,14-octaaza[16]annulene “Me8[16]aneN8”, were synthesized and characterized.
Making use of a droplet-epitaxial technique, we realize nanometer-sized quantum ring complexes, consisting of a well-defined inner ring and an outer ring. Electronic structure inherent in the unique quantum system is analyzed using a micro-photoluminescence technique. One advantage of our growth method is that it pres…
Cytochrome c and xylanase were adsorbed onto two mesoporous materials, SBA-15 (a pure silicate) and MSE (an organosilicate), with very similar physical properties but differing chemical compositions. A methodical order was developed whereby the influences of surface area, pore size, extent of order, particle size, sur…
Cobalt hydroxide nanoplatelets with a uniform hexagonal shape were prepared in high yield ( approximately 95%) by a facile hydrothermal route in the presence of poly(vinylpyrrolidone). This method provides a simple, low-cost, and large-scale route to produce beta-cobalt hydroxide nanoplatelets with an average diameter…
A series of beta-diiminato complexes of the form (BDI-3)MX where (BDI-3) = [CH(CMeNC(6)H(4)-2-OMe)(2)]; M = Zn, Mg; X = O(i)()Pr, O(t)()Bu, or N(SiMe(3))(2) has been synthesized. The (BDI-3) ligand is bidentate in (BDI-3)ZnN(SiMe(3))(2) and tetradentate in (BDI-3)MgN(SiMe(3))(2). The alkoxide complexes are shown to be…
Cryptomelane-type manganese oxide octahedral molecular (OMS) sieve three-dimensional (3D) nanostructures were synthesized via facile temple-free low-temperature hydrothermal reactions. Morphologies of the cryptomelane-type OMS-2 nanoparticles with tunnel dimension of 4.6 x 4.6 A can be tuned by varying reaction temper…
The alignment of multiwalled carbon nanotubes (MWNTs) has been accomplished through deposition of uniform layers of magnetite/maghemite nanoparticles (diameter = 6-10 nm) and use of an external magnetic field. The coating of CNTs with magnetic nanoparticles was performed by combining the polymer wrapping and layer-by-…
Abstract The γ‐radiation‐induced grafting of 1,2,2,6,6‐pentamethyl‐4‐piperidinyl methacrylate (PMPM) onto polypropylene (PP) was investigated with a simultaneous irradiation technique. The effects of the solvent, dose, monomer concentration, and photoinitiator on the grafting were investigated. The grafting was easier…
We report the dispersion of the optical Kerr effect and the wavelength-dependent critical power of light self-focusing for semiconductors CdxHg1−xGa2S4 in view of the calculated results from the density functional theory combined with an anharmonic oscillator model. It is shown that the third-order optical properties…
The incommensurately modulated antiferroelectric phase of sodium nitrite, NaNO2, transforms at T(N) = 437.7 K to the short-range modulated paraelectric phase. The apparently discontinuous phase transition is accompanied by characteristic changes in the diffraction pattern. Contrary to the well known modulated structur…
As a novel approach for development of a new class of expanding material, we examined Lewis acid-mediated double ring-opening reactions of a highly rigid and rodlike prepolymer consisting of labile, volume-expanding bicyclic moieties, oligo (spiroorthocarbonate) (o-SOC). As a result, the treatment with large amount of…
Abstract Polybutadiene‐ g ‐poly(styrene‐ co ‐acrylonitrile) (PB‐ g ‐SAN) impact modifiers with different polybutadiene (PB)/poly(styrene‐ co ‐acrylonitrile) (SAN) ratios ranging from 20.5/79.5 to 82.7/17.3 were synthesized by seeded emulsion polymerization. Acrylonitrile–butadiene–styrene (ABS) blends with a constant…
Abstract Oligoethylene‐end‐capped polylactides were synthesized through the ring‐opening polymerization of L ‐lactide with alcohol‐terminated oligoethylenes as macroinitiators. The polymerization of L ‐lactide was carried out in bulk at 130 °C in the presence of stannous octoate and primary alcohols with four differen…