Materials Literature
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Seven symmetrical azomethines with two imine groups (HC=N) were synthesized by condensation of the benzene-1,4-dicarboxaldehydewith five amines (first group: A1-A5) and of the 2,5-thiophenedicarboxaldehyde with two amines (second group: AT1-AT2). Additionally, two unsymmetrical azomethines were obtained by a two step…
Using a simple interfacial configuration based on poly(acrylic acid) adsorption at an air−water interface, we were able to grow micron-thick crystalline calcium carbonate continuous films. The fine mechanisms of the interaction between the mineral ions and the polyelectrolyte are investigated using combined optical mi…
Large-scale three-dimensional cadmium sulfide (CdS) spheres composed of hexagon-based pyramids were synthesized through a facile solution-phase reaction from CdCl 2, thioacetamide, and a polymer, where the polymer acted as both a dispersant and coating agent. The reaction conditions influencing the synthesis of these…
Layer-by-layer (LbL) assembled organic-inorganic poly(acrylic acid) (PAA)/poly(allylamine hydrochloride) (PAH)/ Au nanoparticle hybrid films are patterned by using Norland Optical Adhesive 63 (NOA 63) polymer molds. Depending on the rigidity of the hybrid films, their patterning can be realized by a room-temperature i…
Large area, well-aligned single-walled carbon nanotubes (SWNTs) with node density up to 10 7 /cm 2 are prepared by a convenient one-step process, which is based on the two growth modes of carbon nanotubes: gas flow-directed growth mode and lattice-orientated growth mode. Carbon nanotubes cross-bar is realized by chemi…
We fabricated magnetic nanofiber films by manufacturing the nanoparticles with the polyol process followed by the electrospinning process to combine them into a thin film. The magnetite (Fe3O4) nanoparticles with mean crystallite size of 6–8 nm were synthesized through reduction of iron (II) acetate in the polyols and…
We report the preparation and characterization of multilayer coated droplets in an emulsion. Stability and control of mass transport across the interface are the key issues for such coated microdroplets. Shelf life of cosmetic, pharmaceutical, and food formulations can be improved by increasing stability. Moreover, su…
Abstract The effect of two different species of layered silicates on the morphology, mechanical properties, and methanol vapor barrier properties of polyamide‐6 (PA6) nanocomposites was examined using identical experimental conditions for both species. The layered silicate species used were natural montmorillonite (MM…
This paper describes the fabrication of a backlight unit for liquid crystal display based on printed carbon nanotube field emitters with lateral gate and additional mesh structures. The device architecture has been optimized through field emission characterization and supporting numerical simulation. The emission curr…
A simple sonochemical procedure was developed to synthesize the flowerlike yttria precursor Y 2 (OH) 5 NO 3 ·1.5H 2 O. Y 2 O 3 with the same morphology was readily obtained by calcination of the precursor. The microstructures and morphologies of the products were characterized by X-ray powder diffraction (XRD), X-ray…
NO x chemistry on Al 2 O 3 and Ag n /Al 2 O 3 ( n ≤ 4) is investigated by density functional theory calculations. Three different terminations of α-Al 2 O 3 (0001) are considered, namely Al-terminated, fully hydroxyl-terminated, and partially oxygen-terminated. Weak adhesion energies are reported for Ag n supported on…
In this article, we have demonstrated a universal method for improving the stability of polyelectrolyte multilayer films by designing a photoreactive polyanion as the building block for layer-by-layer (LbL) self-assembly. By grafting an azido group into poly(acrylic acid), we synthesized a photoreactive polyanion, whi…
We have used a thiol-functionalized polyhedral oligomeric silsesquioxane (SH-POSS) as a protective group for the preparation of POSS-protected gold nanoparticles (POSS−Au NPs). The organic/inorganic hybrid SH-POSS NPs exhibited an interesting platelike morphology arising from steric hindrance between the isobutyl grou…
The structural, magnetic, and magnetostrictive properties of 75nm Fe100−xGax films (0⩽x⩽30) have been studied to determine how a forming field during growth affects these properties. Two film sets were grown using a cosputtering-evaporation technique with and without a forming field of 65kAm−1. Using x-ray diffraction…
We have explored in this work the stability and the reactivity of multiarm cyclam-grafted mesoporous silica samples in aqueous solution. A series of hybrid materials have been prepared by grafting silylated cyclam molecules bearing one, two, or four silyl groups onto both amorphous silica gel (K60) and ordered mesopor…
The crystal structure and magnetic properties of melt spun Sm(Co,V)7 ribbons have been investigated. It was found that SmCo7−xVx ribbons may crystallize in pure TbCu7-type structure for x=0.1–0.3 spun at a high wheel speed of 40 m/s. The structure refinement results show that the doping element V prefers to occupy the…
Steady-state and time-resolved studies of the fluorescence of four aromatic unconjugated pterins (pterin (Ptr), 6-(hydroxymethyl)pterin (Hmp), 6-methylpterin (Mep), and 6,7-dimethylpterin (Dmp)) in aqueous solutions in the presence of different nucleotides (2'-deoxyguanosine 5'-monophosphate (dGMP), 2'-deoxyadenosine…
Merging a colloidal approach for the synthesis of Pt nanoparticles and a supramolecular pathway for generating mesostructured oxides can provide via a one-pot synthesis a well-defined, active, and stable heterogeneous catalyst. This material contains regularly distributed Pt nanoparticles along the channel pores of a…
Systems of platelet-shaped nanostacks of the synthetic clay Na-fluorohectorite, suspended in saline solutions of various salt concentrations, exhibit a rich phase behavior with up to four phases coexisting in a single sample tube. They are studied here using small-angle x-ray scattering: the anisotropy of the obtained…
The paper presents the results of photoluminescence (PL) and Raman scattering studies of non-conjugated and bio-conjugated CdSe/ZnS core-shell quantum dots (QDs). The commercial CdSe/ZnS QDs used are characterized by color emission with maxima at 605-610 nm (2.03-2.05 eV). PL spectra of non-conjugated QDs are the supe…