Materials Literature
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Abstract Nitrogen‐ion beam pulses emitted from a low‐energy (1.45 kJ) Mather‐type plasma focus device are used for the surface modification of PTFE polymer specimens. The specimens, placed at a fixed position, are implanted using different number of pulses. Raman spectroscopy and XRD are employed to probe the structur…
The improvement of hydrophilicity and hemocompatibility of thermoplastic polyurethane (TPU) film was developed using surface modification of polyelectrolyte multilayers (PEMs) deposition. The polysaccharide PEMs included chitosan (CS, as a positive-charged agent) and dextran sulfate (DS, as a negative-charged and an a…
Abstract The photoluminescence of poly[2‐(3‐thienyl)ethyloxy‐4‐butylsulfonate)] (PTE‐BS) in aqueous solution increases threefold on addition of the surfactant tetrabutylammonium perchlorate (TBA). Furthermore, the luminescence of the PTE‐BS/TBA system is reduced by more than five times by the addition of small amounts…
The molecular organization of a mixed film, containing a water-soluble tetracationic porphyrin (TMPyP) and a p-tert-butyl calix[8]arene octacarboxylic acid derivative (C8A), at the air-water interface and on a solid support (LB film), has been investigated. Although the TMPyP aggregation was not detected at the air-wa…
A static light scattering (SLS) study of bovine serum albumin (BSA) mixtures with two anionic graft copolymers of poly(sodium acrylate-co-sodium 2-acrylamido-2-methyl-1-propanesulphonate)-graft-poly(N,N-dimethylacrylamide), with a high composition in poly(N,N-dimethylacrylamide) (PDMAM) side chains, revealed the forma…
We developed a technique for the local electrical detection of a plasmon resonance in a single metal nanoparticle. A gold nanoparticle is coupled to a GaAs photodetector placed in the particle's near field. Light scattered by the particle is coupled into the semiconductor cavity of the photodetector, providing efficie…
Abstract The plasma‐assisted process presented in this paper facilitates the deposition of nitrogen containing functional coatings on textiles. Low pressure RF plasma was used to deposit multi‐functional thin films, which have a high amine content. Either acetylene or ethylene were mixed with ammonia to obtain a cross…
This paper describes a novel synthetic strategy for the preparation of thiol end-functionalized poly(ethylene glycol) (PEG)- b -polyesters. Block copolymers containing an internal disulfide bond were prepared through the ring-opening polymerization of dl -lactide (LA) and ε-caprolactone (CL) employing a PEG disulfide…
Uniform zinc gallate (ZnGa 2 O 4 ) nanowires are successfully synthesized by a one-step simple thermal evaporation of a mixture of ZnO and Ga 2 O 3 powders under controlled conditions. Its morphology and microstructures were determined by X-ray powder diffraction, scanning electron microscopy, high-resolution transmis…
We study the structure and the dynamics in the formation of irreversible gels by means of molecular dynamics simulation of a model system where the gelation transition is due to the random percolation of permanent bonds between neighboring particles. We analyze the heterogeneities of the dynamics in terms of the fluct…
A $\ensuremath{\pi}$-shaped metallic metamaterial (geometrically, a combination medium of C-shaped resonators and continuous wires) is proposed to numerically investigate its transmission band near the resonant frequency, where otherwise it should be a negative-permeability (or negative-permittivity) stop band if eith…
The formation of polyelectrolyte multilayers (PEMs) is investigated using a silicon-on-insulator based thin film resistor which is sensitive to variations of the surface potential. The buildup of the PEMs at the silicon oxide surface of the device can be observed in real time as defined potential shifts. The influence…
We present a theoretical investigation of an electrically controllable spin filter based on multiferroic tunneling junction. This spin filter combines the exchange splitting of ferromagnets and asymmetry in energy potential due to the screening of ferroelectric polarization charges at electrodes. Transfer matrix calcu…
By the use of the effective field theory with a probability distribution technique, we apply the transverse spin-1/2 Ising model to study the intrinsic hysteresis of a ferroelectric bilayer with an antiferroelectric interfacial coupling. The effects of the thickness, the interfacial coupling constant, the transverse f…
Abstract This paper investigates the pH‐dependent micellization of (hydroxyethyl cellulose)‐ graft ‐poly(acrylic acid) (HEC‐ graft ‐PAA), the crosslinking of the pH‐induced nanoparticles and the drug loading of the crosslinked multi‐morphological nanoparticles. The hydrodynamic diameter (〈 D h 〉) of the pH‐induced mic…
Physical forces experienced by engineered-tissues during in vitro cultivation influence tissue growth and function. The hydrodynamic environment within bioreactors plays a decisive role in providing the necessary physical stimuli and nutrient transport to support tissue development. Our overall goal is to investigate…
Abstract The X‐ray structure, spectroscopic, and magnetic properties of a cyanide‐bridged complex, {[(Tp*)Fe III (CN) 3 ] 2 [Ni II (bipy) 2 ] 2 [OTf] 2 } · 2H 2 O ( 2 ) are described [Tp* = hydridotris(3,5‐dimethylpyrazol‐1‐yl)borate; bipy = 2,2′‐bipyridine; OTf = trifluromethanesulfonate]. Magnetic measurements indic…
Silver (Ag) nanoparticles covered with a photochromic diarylethene derivative that has an anthracene unit were synthesized by Brust's method and their photochromic and fluorescent performance were studied by using absorption and fluorescence spectroscopy. The diarylethene ligand showed a reversible photochromic reacti…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTImportance of End-Group Structure in Controlling the Interfacial Activity of Polymer-Coated NanoparticlesBumjoon J. Kim, Susan Given-Beck, Joona Bang, Craig J. Hawker, and Edward J. KramerView Author Information Department of Chemic…
Highly ordered 2D-hexagonal mesoporous Pt−Ru alloy particles were deposited by an electrochemical process after a lyotropic liquid crystalline (LLC) film including both Pt and Ru species was prepared on a conductive substrate from a diluted surfactant solution by casting. We have determined the alloy state by using hi…