Materials Literature
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Abstract Effects of thermal stability of surfactants with amino and imido groups on thermal properties of poly(ethylene terephthalate) (PET)/clay composites were studied. The imidosilane surfactant was synthesized successfully from the imide reaction between amino silane and phthalic anhydride. TGA shows that imidosil…
In this study, the adsorption of a single Cu atom on the polar ZnO(0001) and ZnO(0001) surfaces was investigated by means of highly accurate wave function based ab initio methods. Different modifications of the polar surfaces were investigated: unstabilized surfaces, surfaces with hydrogen and OH overlayers, and defec…
The effect of deposition parameters, i.e. type of substrate (microscope glass, quartz and mica) and thickness (500 nm, 800 nm and 1100 nm), on the optical properties of Ge10Se90− x Te x (x = 0, 10, 20, 30, 40, 50) thin films was investigated. Thin films were deposited by the vacuum evaporation technique at a base pres…
Coordination multilayers consisting of Pd(II) pincer-type complexes and poly(vinyl pyridine) were synthesized and characterized. Film properties were found to be dependent on and could be tuned by varying bath deposition concentrations, polymer molecular weight, and solution additives that compete with binding. Genera…
Electronic structure calculations based on density functional theory have been applied to clusters of titanium with different alloying elements in order to obtain quantum parameters that give some information on the interaction between the mother and alloying atoms. Average values of these parameters weighted with the…
Schrittweise: Fünfkernige Cluster (siehe Bild) wurden als Baueinheiten für den Aufbau dreidimensionaler, diamantartiger Netzwerke synthetisiert. Die ESI-Massenspektren dieser Cluster belegen, dass die fünfkernigen Einheiten ihre strukturelle Integrität behalten bevor sie die Netzwerke bilden, was eine erfolgreiche sch…
Ein cyclisches Tetramer des Dialkinylen-verbrückten Zink-Bisporphyrin-Rotamers [ZnP()2] zeigt eine einzigartige solvatochrome Reaktion auf unpolare Lösungsmittel mit niedrigen Dielektrizitätskonstanten (2.23–2.57). Diese Solvatochromie rührt von der π-Konjugation von [ZnP()2] her. Das Tetramer [{ZnP()2}4] ermöglich…
Interactions between glassy polymer chains and the uniformly dispersed carbon nanotubes (CNTs) in nanocomposites were investigated with surface-grafted multiwalled CNTs dispersed in two model polymer systems, polystyrene (PS) and poly(phenylene oxide) (PPO), representing respectively brittle and ductile polymers. Alth…
Characterization of interfacial materials isolated from water-in-crude oil emulsions is a useful tool to reveal the emulsion stability mechanisms. “Heavy water (D 2 O) method” is a technique used successfully in the past to isolate the interfacial organics from laboratory-made emulsions containing D 2 O droplets. Howe…
Abstract BACKGROUND: While carbon nanotubes are highly interesting materials for a variety of applications, their inherent insolubility limits widespread applications and solution‐phase processing. It is known that chemical functionalization can overcome this insolubility problem, and covalent grafting of polymers to…
Abstract Rigid polyurethane foams (RPUFs) have been fabricated from crude MDI (CMDI) and polypropylene glycols (PPGs) of various functionalities ( f ) with HFC 365mfc as a blowing agent. Foam density increased, cell size and density distribution decreased with increasing f while the closed cell content was kept consta…
This paper presents a novel and facile method for the fabrication of nanocomposite films with ordered porous surface structures. In this approach, a water-borne poly(styrene-co-butyl acrylate-co-acrylic acid)/silica nanocomposite dispersion was synthesized in situ by surfactant-free emulsion polymerization by using 3-…
Photoinduced electron transfer (ET) in films of the double-linked free-base phthalocyanine−fullerene dyads (Pc−C 60 ) was studied in solid Langmuir−Blodgett (LB) films using femtosecond pump−probe and microsecond flash-photolysis methods. Excitation of the phthalocyanine (Pc) moiety of the dyad results in a rapid (0.8…
Expression of genes in the gapA operon encoding five enzymes for triose phosphate interconversion in Bacillus subtilis is negatively regulated by the Central glycolytic genes Regulator (CggR). CggR belongs to the large SorC/DeoR family of prokaryotic transcriptional regulators, characterized by an N-terminal DNA-bindi…
Candida antarctica Lipase B (CALB), immobilized on Lewatit (Novozym 435), was used as catalyst to prepare a series of poly(butylene carbonate- co -butylene succinate) [poly(BC- co -BS)] copolymers. The polymers were synthesized by copolymerizations of diethyl carbonate (DEC), 1,4-butanediol (BD), and diethyl succinate…
On basis of a coarse-grained model, we investigate the conformational behavior of a spherical polyelectrolyte brush (SPB) in a solution containing oppositely charged linear polyelectrolytes. Our results obtained from Brownian dynamics (BD) simulations show that with increasing amount of linear polyelectrolytes the SPB…
Time-resolved small-angle X-ray scattering measurements using synchrotron radiation have been conducted during tensile deformation of a poly(ethylene terephthalate) fiber at room temperature. The marked change of the scattering patterns from the layer-line scattering with a four-spot nature to the layer-line scatterin…
Quantum chemical calculations of geometric and electronic structure and vertical transition energies for several low-lying excited states of the neutral and negatively charged nitrogen-vacancy point defect in diamond (NV(0) and NV(-)) have been performed employing various theoretical methods and basis sets and using f…
The heat capacities in the solid state, below the glass transition, of Bombyx mori silk fibroin with and without water have been determined based on the contribution of vibrational motions of the components: poly(amino acid)s and water. These vibrational heat capacities were constructed using the Advanced Thermal Anal…
The scattering properties of multipole plasmon resonances sustained by silver and gold nanorods (NRs) are investigated using classical electrodynamics DDA (discrete dipole approximation) simulations. The angular distribution of the scattered light is examined as a function of the multipole order, NR length, noble meta…