Materials Literature
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This work reports on the structural and spectroscopic properties of ethane-bridged Zn porphyrin dimers (1) in Langmuir-Schäfer (LS) thin films by combining scanning force microscopy (SFM) with film balance, UV-vis absorption, fluorescence, and nanosecond laser flash photolysis measurements. Results show that depending…
Since the inception of the field of tissue engineering, there has been a considerable effort to develop an "Ideal" tissue engineering scaffold. To date, investigators have developed materials such as collagen, poly(glycolic acid) (PGA), poly(lactic acid) (PLA), and polycaprolactone (PCL) for use in matrix construction…
Abstract Poly(propylene)/clay nanocomposites were prepared by a “one step” method, using pristine montmorillonite (MMT) with surfactant loading at different ratios. The nanocomposite structure was examined using X‐ray diffraction (XRD), transmission electron microscopy (TEM) and high resolution electron microscopy (HR…
The [Os(III)(CN)6]3- anion is prepared by chemical oxidation in aqueous solution and isolated as yellow prisms of [Ph4P]3[Os(III)(CN)6].6H2O (1). This species crystallizes in the triclinic space group P with cell parameters a = 13.7609(11) A, b = 16.2275(13) A, c = 17.0895(14) A, alpha = 91.4040(10) degrees , beta = 1…
[structure: see text] 2-C-Acetoxymethyl glycal derivatives reacted with beta-naphthol in the presence of InCl(3) (30 mol %) to give chiral pyrano[2,3-b]naphtho[1,2-e]pyrans in good to excellent yields via stereoselective Ferrier rearrangement-tandem cyclization. The major glucose-derived product exhibited crystal pack…
Dehydrogenases and reductases are enzymes of fundamental metabolic importance that often adopt a specific structure known as the Rossmann fold. This fold, consisting of a six-stranded beta-sheet surrounded by alpha-helices, is responsible for coenzyme binding. We have developed a method to identify Rossmann folds and…
Classical molecular dynamics simulations of atomistic models of combustion-generated carbon nanoparticles and lipid bilayers have been performed to explore their possible structural, dynamical, and thermodynamic effects on biological membranes. The DREIDING generic force field is used for the carbonaceous nanoparticle…
Composites of shape memory alloys (SMA) with a matrix have been widely studied to suppress propagating damage of the matrix, where the embedded SMA is used as an actuator. We use the embedded SMA wire in composites both as an actuator and as a strain sensor. The possibilities of using the SMA wire as a strain sensor t…
Abstract Cast film composites have been prepared from aqueous polymer solutions containing nanometric silica particles. The polymers were polyvinyl alcohol (PVA), hydroxypropylmethylcellulose (HPMC) and a blend of PVA‐HPMC polymers. In the aqueous dispersions, the polymer–silica interactions were studied through adsor…
The water-conducting network of capillaries in plants has evolved to cope with the frequent occurrence of cavitation, which leads to air-filled capillaries that are unable to function in water transport. However, the material from which the capillaries are constructed is not perfectly wetted by water, contrary to what…
Polymeric nanofibers are rapidly finding their place in nanomaterials technology. Electrospinning makes it easy to produce many kinds of nanofibers for many purposes.
We study the electronic structure of Mott-Hubbard systems ${\mathrm{SrVO}}_{3}$ and ${\mathrm{CaVO}}_{3}$ with bulk and surface-sensitive high-resolution photoemission spectroscopy, using a vacuum ultraviolet laser, synchrotron radiation, and a discharge lamp ($h\ensuremath{\nu}=7--21\text{ }\text{ }\mathrm{eV}$). A s…
Interpolyelectrolyte complex (IPEC) formation between poly(styrene sulfonate) (PSS) and poly(allylamine hydrochloride) (PAH) has been studied over a range of ionic strengths by isothermal titration calorimetry (ITC), turbidity titration, and electrostatic layer-by-layer assembly (ELBL). The results indicate that IPEC…
The adsorption of carbon dimers on carbon nanotubes leads to a rich spectrum of structures and electronic structure modifications. Barriers for the formation of carbon dimer induced defects are calculated and found to be considerably lower than those for the Stone-Wales defect. The electronic states introduced by the…
We describe and analyze laser trapping of small colloidal particles in a nematic liquid crystal, where the index of refraction of colloids is smaller compared to the indices of the liquid crystal. Two mechanisms are identified that are responsible for this anomalous trapping: (i) below the optical Fréedericksz transit…
The Ta( CH t Bu)(CH 2 t Bu) 3 complex 1 reacts with the OH groups of a MCM-41 mesoporous silica dehydroxylated at 500 °C to form the monosiloxy surface species [(⋮SiO)Ta( CH t Bu)(CH 2 t Bu) 2 ] 2, with evolution of 1 equiv per Ta of neopentane. Complex 2 leads to a mixture of supported tantalum hydrides [(⋮SiO) 2 Ta(…
A principally new exploit of ionic liquids as an alternative reaction medium in the synthesis of cyano-bridged coordination-polymer nanoparticles is reported. Stable colloid solutions containing nanoparticles of cyano-bridged molecule-based magnets, M)[Fe(CN)6]2/[RMIM][BF4] (M2+=Ni, Cu, Co) and Fe4[Fe(CN)6]3/[RMIM][BF…
In-situ rheo-SAXS (small-angle X-ray scattering) and rheo-WAXD (wide-angle X-ray diffraction) techniques were used to investigate repeated melting and re-formation of the flow-induced shish-kebab precursor structure in a once-sheared polyethylene (PE) bimodal blend at the confined quiescent state. The blend consisted…
Protein microspheres have been used in the fields of biomedical imaging and drug delivery, but surface modification for cell targeting has been problematic. We have for the first time used an electrostatic adhesion approach to adhere arginine-glutamic acid-aspartic acid (RGD) containing peptides to the surface of prot…
The interaction of the alpha5beta1 integrin with its ligand, fibronectin, supports numerous adhesive functions and has an important role in health and disease. In recent years, there has been a considerable effort in designing fibronectin-mimetic peptides to target the integrin. However, to date, the therapeutic use o…