Materials Literature
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Molecular dynamics simulations were used to study the wetting of nanogrooved PE and PVC polymer surfaces. The contact angles, equilibrium states, and equilibrium shapes of two nanosized water droplets were analyzed on surfaces with 1D-arranged periodic roughness of various dimensions. The composite solid-liquid contac…
In the tryptophan synthase bienzyme complex, indole produced by substrate cleavage at the alpha-site is channeled to the beta-site via a 25 A long tunnel. Within the beta-site, indole and l-Ser react with pyridoxal 5'-phosphate in a two-stage reaction to give l-Trp. In stage I, l-Ser forms an external aldimine, E(Aex1…
Three series of ionic stilbazolium salts with different counteranions have been synthesized to investigate the effect of counteranion size to crystal packing. Single crystals of five new salts were successfully grown from solution by the slow cooling and slow evaporation techniques. X-ray studies revealed that three o…
The photovoltage produced by local illumination at the Schottky contacts of carbon nanotube field-effect transistors varies substantially with gate voltage. This is particularly pronounced in ambipolar nanotube transistors where the photovoltage switches sign as the device changes from p-type to n-type. The detailed t…
Abstract Novel nanocomposite films of TiO 2 nanoparticles and hydrophobic polymers having polar groups, poly (bisphenol‐A and epichlorohydrin) or copolymer of styrene and maleic anhydride, with high refractive indices, high transparency, no color, solvent‐resistance, good thermal stability, and mechanical properties w…
Monodisperse stereocomplex nanogels were obtained through the self-assembly of an equimolar mixture of dextran-graft-poly(L-lactide) (Dex-g-PLLA) and dextran-graft-poly(D-lactide) (Dex-g-PDLA) amphiphilic copolymers with well-defined composition in a dilute aqueous solution. The stereocomplex nanogel possessed partial…
Detergent interactions with carbon nanotubes are of potential importance in a number of bionanotechnology applications. We investigate the interaction of lysophospholipids with single-walled carbon nanotubes via coarse-grained molecular dynamics. We present compelling evidence that the mechanism of adsorption of these…
We present here a model for the coupling among small nanoparticles excited by an optical electric field in the framework of our optical lumped nanocircuit theory [N. Engheta, A. Salandrino, and A. Alu Phys. Rev. Lett. 95, 095504 (2005)]. We derive how this coupling affects the corresponding nanocircuit model by adding…
Novel photochromic triangle terarylenes are synthesized, and their photochromic properties and thermal bleaching kinetics are investigated. Fairly high photochemical coloration reactivity is observed with photochemical quantum yield as high as 0.6 for 4,5-dithienyl thiazole derivative. Introduction of phenyl-ethynyl g…
The infiltration (impregnation) of nanoscale particles, forming connected networks, into solid oxide fuel cell electrodes, has been shown to lead to considerable benefit in performance. Porous electrode skeletons (backbones), consisting of electrolyte material such as YSZ, when infiltrated, delivered results comparabl…
A general synthetic method has been developed to fabricate and assemble ferromagnetic transition metal nanofibers. By employing the novel electrospinning technique followed by subsequent heat treatment, we have successfully prepared uniform nanofibers of Fe, Co, and Ni with diameters of ∼25 nm and lengths longer than…
The catalytic effects of inherent mineral matters on NO x emissions from coal combustion have been investigated by a thermo-gravimetric analyzer (TGA) equipped with a gas analyzer. The effect of demineralization and the individual effect of Na, K, Ca, Mg, and Fe on the formation of NO x are studied as well as the comb…
High Resolution Image Download MS PowerPoint Slide Chlorine effectively improves the selectivity of catalytic partial oxidation reactions on Au(111). Here, scanning tunneling microscopy was used to visualize the dispersal and redistribution of Au islands stabilized by oxygen on the surface. The dispersal of Au islands…
Phase transitions in PbZn 1/3 Nb 2/3 O 3 -7%PbTiO 3 (PZN-7%PT) relaxor ferroelectric crystals have been investigated by the acoustic emission (AE) method. Two types of transitions have been detected: (i) associated with the thermally induced (on cooling) formation of intrinsic polar nanoregions (PNRs) and (ii) related…
The purpose of the present paper was to study at physiological pH the affinity between vasoactive intestinal peptide (VIP) and four poly(amidoamine) dendrimers (PAMAMs) designed for drug delivery. Therefore, a fast and reproducible CE method was first developed to analyze the strongly basic peptide. To allow an accura…
Fluorinated oligomers, when blended into polyurethane, have been shown to migrate to the surface and generate an interface that minimizes protein denaturation and reduces cell activation. This type of surface modification can be achieved with ppm quantities of a bioactive fluorinated surface modifier (BFSM), enabling…
Abstract A novel high‐quality polyphenanthrene (PPH) film with electrical conductivity of 10 −1 S cm −1 was synthesized electrochemically by direct anodic oxidation of phenanthrene in boron trifluoride diethyl etherate containing 10% concentrated sulfuric acid (v/v). The oxidation onset potential of phenanthrene in th…
BACKGROUND: The relation between the structure of discotic molecules and columnar properties, a crucial point for the realization of new advanced materials, is still largely unknown. A paradigmatic case is that hexa-alkyl-thio substituted triphenylenes present mesogenic behavior while the corresponding azatriphenylene…
A simple and effective nonlithographic method to produce a novel organization of noble metal nanoparticles into horseshoe-like nanostructures via self-assembly is described. The adsorption of Au nanoparticles stabilized with the dendrimer 1,2,3,4,5,6-hexakis[(3',5'-bis(benzyloxy)benzyl)sulfanylmethyl]benzene (S(6)G(1)…
Organic/inorganic hybrid multilayer films with noncentrosymmetrically orientated azobenzene chromophores were fabricated by the sequential deposition of ZrO2 layers by a surface sol-gel process and subsequent layer-by-layer (LbL) adsorption of the nonlinear optical (NLO)-active azobenzene-containing polyanion PAC-azoB…