Materials Literature
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Langevin dynamics simulations are performed on linear-dendritic diblock copolymers containing bead-spring, freely jointed chains composed of hydrophobic linear monomers and hydrophilic dendritic monomers. The critical micelle concentration (CMC), micelle size distribution, and shape are examined as a function of dendr…
Self-assembled behavior of symmetric ABA rod-coil-rod triblock copolymer melts is studied by applying self-consistent-field lattice techniques in three-dimensional space. The phase diagram is constructed to understand the effects of the chain architecture on the self-assembled behavior. Four stable structures are obse…
The effects of size, shape and organization on the surface plasmon resonances of Ag nanoclusters sandwiched between Si(3)N(4) layers are studied by transmission electron microscopy and anisotropic spectroscopic ellipsometry. We present an easy-to-handle model that quantitatively links the nanostructure and optical res…
We have developed a new method for the fabrication of metal nanoparticle/polythiophene nanotube composites, i.e., the template-based electrochemical polymerization of terthiophene-linked oligoethyleneoxy-thiol ( 1 ) and -phosphine ( 2 )-stabilized gold and palladium nanoparticles ( 1 -Au, 1 -Pd, and 2 -Pd) in a nanopo…
Condensation processes are of importance for many heat transfer applications where a large amount of energy has to be transferred by a working fluid using the latent heat available during the phase transition. Whether ideal dropwise or filmwise condensation or a mixed condensation form can be realized depends on the p…
We present a comprehensive dislocation dynamics (DD) study of the strength of stacking fault tetrahedra (SFT) to screw dislocation glide in fcc Cu. Our methodology explicitly accounts for partial dislocation reactions in fcc crystals, which allows us to provide more detailed insights into the dislocation–SFT processes…
Abstract Natural rubber latex layered clay nanocomposites were prepared with low loadings of nanoclay using conventional compounding technique. A higher loading of clay resulted in processing difficulties due to viscosity build up. X‐ray analysis showed that nanocomposites in which layered silicate layers were either…
A methodology for preparing supramolecular hydrogels from guest-modified cyclodextrins (CDs) based on the host-guest and hydrogen-bonding interactions of CDs is presented. Four types of modified CDs were synthesized to understand better the gelation mechanism. The 2D ROESY NMR spectrum of beta-CD-AmTNB (Am=amino, TNB=…
Controversial experimental results have suggested that the presence of alkali metals in graphitic adsorbents would intensify hydrogen adsorption. Mainly by use of density functional theory methods, several authors have confirmed this intensification, which has been explained by a significant charge transfer from dopan…
A new magnetic resonance imaging contrast agent containing organophosphonate functional groups was synthesized in high yield by a simple synthesis procedure. This molecule exhibits much higher longitudinal water proton relaxivity (37.0 mM −1 s −1 ) than commercial Omniscan (Gd-DTPA BMA, 5.7 mM −1 s −1 ) at 0.35 T. Not…
Using the effect of the fluorescence enhancement in close proximity to metal nanostructures, we have been able to demonstrate ultrasensitive immunoassays suitable for the detection of biomarkers. Silver fractal-like structures have been grown by electrochemical reduction of silver on the surface of glass slides. A mod…
Coarse-grained modeling of molecular fluids is often based on nonspherical convex rigid bodies like ellipsoids or spherocylinders representing rodlike or platelike molecules or groups of atoms, with site-site interaction potentials depending both on the distance among the particles and the relative orientation. In thi…
A new compositional family of relaxor ferroelectrics was investigated based on the high‐temperature Bi(Me)O 3 –PbTiO 3 ferroelectric perovskite family. Compositions were fabricated near an estimated morphotropic phase boundary (MPB) of the x BiScO 3 – y Pb(Mg 1/3 Nb 2/3 )O 3 – z PbTiO 3 ( x BS– y PMN– z PT) ternary sy…
ATR-FTIRAS measurements combined with linear potential sweep voltammetry were conducted to investigate oxidation of CO adsorbed on a highly dispersed Pt catalyst supported on carbon black, Pt/C, and carbon-unsupported Pt black catalyst, Pt-B. Bands nu(CO) of atop- and bridge-bonded COs were resolved into those of COs…
Polypyrrole nanofibers are synthesized through a template-free chemical route and used as the active component for hydrogen gas sensing at room temperature. The synthesis of polypyrrole nanofibers was achieved by using bipyrrole as an initiator to speed up the polymerization of pyrrole with FeCl as the oxidizing agent…
A facile route to prepare two-dimensional ZnO nanosheet structures on Si substrates was developed through the adoption of a ZnO seed-layer and suitable growth medium in this work. The characterization results showed that ZnO nanosheets could be grown on Si substrates with a pre-formed ZnO seed-layer at room temperatur…
A technique of measuring contact resistance between an individual nanotube and a deposited metallic film is described. Using laser ablation to sequentially shorten the contact length between a nanotube and the evaporated metallic film, the linear resistivity of the nanotube as well as the specific contact resistivity…
Elastomeric proteins are widespread in the animal kingdom, and their main function is to confer elasticity and resilience to organs and tissues. Besides common functional properties, elastomeric proteins share a common sequence design. They are usually constituted by repetitive sequences with a high content of glycine…
Abstract Thin films of perfluorinated phthalocyanines F 16 Pc show promise as molecular semiconductors in organic field effect transistors. A review is provided of growth studies and electrical characterization of presently discussed materials. Using this state‐of‐the‐art as a starting point the synthesis and position…
Carboxymethyl chitosan (CMCS) with varying molecular weights (M(v) = 40-405 kDa) and degrees of substitution (DS = 0.25-1.19) has been synthesized by alkalization of chitosan, followed by carboxymethylation with monochloroacetic acid. At DS up to 1.19, the locations where carboxymethylation took place were influenced…