Materials Literature
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A series of cationic lanthanide porphyrinate complexes of the general formula [(Por)Ln(H(2)O)(3)](+) (Ln(3+)=Yb(3+) and Er(3+)) were synthesized in moderate yields through the interaction of meso-pyridyl-substituted porphyrin free bases (H(2)Por) with [Ln{N(SiMe(3))(2)}(3)]·x[LiCl(thf)(3)], and the corresponding neutr…
A quantum confinement model for nanocrystals developed is extended to study for the optical gap shifts in core/shell quantum dots and nanowires. The chemical bond properties and gap shifts in the InP/ZnS, CdSe/CdS, CdSe/ZnS, and CdTe/ZnS core/shell quantum dots are calculated in detail. The calculated band gaps are in…
Nonequilibrium and equilibrium molecular dynamics simulations are employed to study the thermal transport in sintered silicon nanoclusters made of 15 nm diameter nanoparticles arranged on a simple cubic lattice. Both simulation techniques indicate a reduction in the thermal conductivity from ∼120 W/m K (bulk) to 1.5 W…
The linearized Cahn–Hilliard–Cook equation is discretized in the spatial variables by a standard finite-element method. Strong convergence estimates are proved under suitable assumptions on the covariance operator of the Wiener process, which is driving the equation. Backward Euler time stepping is also studied. The a…
Poly(amidoamine) (PAMAM) dendrimers hold great promises for biomedicine. This study sought to examine the toxicity of generation 4 (G4) cationic PAMAM dendrimer to the green microalga, Chlamydomonas reinhardtii, using physiological and molecular biomarkers. Results revealed that the G4 dendrimer at 15 and 25 nM stimul…
This work investigates the emission properties of single color centers in natural diamond nanoparticles for potential use as single photon sources and photostable biomarkers. Two emitters, H3 and H4, were identified by their sharp zero-phonon lines at 503 nm and 496 nm, respectively, in the photoluminescence spectra.…
Combination anti-HIV therapy is important for AIDS treatment. A bolaamphiphilic prodrug, zidovudine-phosphoryl-deoxycholyl didanosine (ZPDD), was synthesized, combining zidovudine (AZT) and didanosine (ddI) in one molecule. As one lipid derivative of nucleosides, ZPDD showed special solubility with free soluble in chl…
Abstract A simple and easily available organocatalytic system was developed for the polymerization of lactide. In partnership with tertiary amines, phenol derivatives were demonstrated to be excellent single H‐bonding catalysts with high conversion within 24 h. In particular, ortho ‐, meta ‐ and meta,meta′ ‐trifluorom…
Although many cagelike molecules can create a catalytic environment for promoting chemical reactions, the construction of receptors that can host anionic species and sensitize their reaction is novel. Here we report the photochemically induced dimerization of the anion radicals of TCNQ (7,7,8,8-tetracyano-para-quinodi…
The structural and magnetic properties of the TbNi(2)Mn(x) series (0.9 ≤ x ≤ 1.10) have been investigated using x-ray diffraction, field- and temperature-dependent AC magnetic susceptibility, DC magnetization (5-340 K; 0-5 T) and (57)Fe Mössbauer spectroscopy (5-300 K). TbNi(2)Mn(x) crystallizes in the MgCu(2)-type st…
In this contribution, we report fluorescent gas chemosensors for detection of nitroaromatic vapors and other classes of volatile organic compounds based on porous silicon (PSi) microcavity (MC) infiltrated with sensory emissive polymers. Such hybrid functional sensors have several advantages over traditional fluoresce…
Jute fabric (hessian cloth)-reinforced polypropylene (PP)-based composites (30 wt% fiber) were prepared by compression molding. Tensile strength (TS), tensile modulus (TM), bending strength (BS), bending modulus (BM), and impact strength (IS) of the composites were found to be 28, 280, 31, 440 MPa, and 18 kJ/m 2 , res…
The sensitive detection of delayed luminescence (τ > 100 μs) can be achieved with an optomechanical instrument, the gated autosynchronous luminescence detector (GALD). The device effectively combines an excitation chopper, a detection chopper, and a dichroic mirror into a single element. With dimensions of 12 mm (H),…
The dispersive properties of plasmonic metamaterials and the ability to tailor their complex transmission strongly suggest their use in versatile optical elements. Here we introduce the idea of such an application in diffractive elements and describe, as a proof-of-principle, two numerical implementations of computer-…
PURPOSE: In vivo bone response was assessed by removal torque, hystological and histometrical analysis on a recently developed biomedical Ti-15Mo alloy, after surface modification by laser beam irradiation, installed in the tibia of rabbits. MATERIALS AND METHODS: A total of 32 wide cylindrical Ti-15Mo dental implants…
In this work, we present experimental evidence that under relatively low level drive (<0.1 MV/m) the large strain (∼0.5%) associated with ferroelectric rhombohedral FR-ferroelectric orthorhombic FO phase transition in domain engineered relaxor–ferroelectric single crystals under compressive stress and bias elec…
Atomic mechanism of glass formation of a supercooled simple monatomic liquid with Lennard-Jones-Gauss (LJG) interatomic potential is studied by molecular dynamics (MD) simulation. Supercooled and glassy states are obtained by cooling from the melt. Glassy state obtained at low temperatures is annealed for very long ti…
Retro: Cyclo[8]isoindole, which has a saddle-shaped geometry (see picture, 2), was synthesized by oxidative coupling of a bicyclo[2.2.2]octadiene(BCOD)-fused 2,2′-bipyrrole followed by a retro-Diels–Alder reaction of BCOD-fused cyclo[8]pyrrole (1). Key trends in the optical spectra of ring-annelated cyclo[8]pyrroles a…
Magnetic tunnel junctions with B2-ordered Co2FeAl full Heusler alloy as a ferromagnetic electrode were fabricated by sputtering on thermally oxidized Si/SiO2 amorphous substrates. A Co2FeAl/MgO/Co50Fe50 structure showed a highly (001)-textured structure and the tunneling magnetoresistance (TMR) ratio of 166% at room t…
A new protein-polymer conjugate made of denatured bovine serum albumin (BSA) covalently bonded to poly(methyl methacrylate) (PMMA) is synthesized by attaching PMMA to acryloylated BSA followed by nanoparticle precipitation. Depending on the BSA to PMMA ratio, these conjugates self-assemble into uniform spherical nanop…