Chromophore‐Functionalized Gold Nanoparticles
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Materials Literature
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Negative corona charge stability in plasma treated polytetrafluoroethylene teflon films
In recent work, we found that the stability of the negative corona charge in radio frequency plasma treated polytetrafluoroethylene (PTFE) films (18 µm thickness) strongly depends on the plasma sources, the exposure time and the condition of the film in the plasma, i.e. the film orientation on the holder and whether t…
Synthesis and characterization of epoxidized styrene–butadiene rubber/silicon dioxide hybrid materials
Abstract Hybrid materials were synthesized from epoxidized (68, 43, or 14%) styrene–butadiene rubber (SBR) and the hydrolysis product of tetraethoxysilane (TEOS) in situ under ultrasonic irradiation. The products were characterized with thermal analysis (differential scanning calorimetry and thermogravimetric analysis…
Micro/nanomechanical characterization of a single decagonal AlCoNi quasicrystal
Micro/nanomechanical characterization of a decagonal single-grain quasicrystal, Al 74.7 Co 16.9 Ni 8.4 , has been carried out. Hardness and elastic modulus were measured by nanoindentation using a nanoindenter. Fracture toughness was measured by microindentation using a microindenter. It was found that the Al 74.7 Co…
Physical characteristics of sweet potato pulp/polycaprolactone blends
Abstract Sweet potato pulp (SSP) obtained as a by‐product from starch extraction was blended with polycaprolactone (PCL) to prepare a biodegradable plastic material. In the blends, PCL was used as a reinforcing agent. The SPP/PCL blends were prepared by compression‐molding under high temperature and pressure, at diffe…
Evaluating the residual stress in PbTiO3thin films prepared by a polymeric chemical method
We report a study of residual stress in PbTiO 3 (PT) thin films prepared on Si substrates by a polymeric chemical method. The E(1TO) frequency was used to evaluate the residual stress through an empirical equation available for bulk PT. We find that the residual stress in PT films increases as the film thickness decre…
Generation of Size‐Controlled Pd0 Nanoclusters inside Nanoporous Domains of Gel‐Type Resins: Diverse and Convergent Evidence That Supports a Strategy of Template‐Controlled Synthesis
Gießformen für Cluster: Die nanoporösen Domänen eines gelartigen mikroporösen funktionalen Harzes werden als Template bei der Herstellung von Pd0-Nanoclustern verwendet, deren Größe durch die weiteste Masche bestimmt wird (siehe Bild). Die Nanoporosität des Harzes im geschwollenen Zustand wurde durch Ausschlusschromat…
Cyclic Polycarbonates by Polycondensation of Bisphenol A with Triphosgene
Interfacial polycondensations of bisphenol A with triphosgene were conducted in the CH 2 Cl 2 /aqueous NaOH system. Four different catalysts were compared: triethylamine, triethylbenzylammonium chloride (TEBA-Cl), tetrabutylammonium hydrogen sulfate, and tetraphenylphosphonium chloride. Triethylamine yielded mixtures…
First-principles study of the mechanisms for the pressure-induced phase transitions in zinc-blende CuBr and CuI
The lattice dynamics of zinc-blende (ZB) CuBr and CuI is studied as a function of pressure using density functional linear-response theory. A pressure-induced soft transverse acoustic (TA) phonon mode is identified for both compounds. Each compound shows a different pressure-induced phonon softening behavior. A TA pho…
Computer Simulation of Selective Aggregation in Binary Colloids
The morphology of clusters formed by selective aggregation of binary colloids is studied in a two-dimensional Monte Carlo simulation for a large range of number fractions (200:1, 100:1, 10:1, 2:1). We find remarkable similarity in morphology to those observed in experiments, from the formation of closed "micelles" to…
First hyperpolarizabilities of triazine derivatives. Ab initio studies and Hammett correlation
Abstract First hyperpolarizabilities (β) of triazine derivatives were studied by the ab initio method (HF/6–31G). The β values of these molecules increase with a stronger donor and as the conjugation length increases, probably because the electronic charge becomes more delocalized and the HOMO–LUMO energy gap (Δ E ) a…
The influence of CeO2on the microstructure and electrical behaviour of ZnO–Bi2O3based varistors
The processing–microstructure-property relations have been studied in order to understand the role of the addition of CeO2 (up to 0.9 mole%) in the ZnO–Bi2O3 based varistor recipe. The microstructural investigation suggests that CeO2 is segregated at the corners of the ZnO grains in addition to the existence of the Zn…
Preparation and characterization of photoluminescent praseodymium-doped ZrO2nanostructured powders
Praseodymium-doped ZrO 2 photoluminescent (PL) powders have been prepared by a co-precipitation process. Different doping concentrations in the start mixture and annealing temperatures for the precipitated were studied. It is observed that the crystalline structure and the crystallinity of the powders depend on the an…
Rationale Synthese kovalent gebundener organisch‐anorganischer Hybdridverbindungen
Abstract Kovalent über organische Einheiten mit delokalisiertem π‐Elektronensystem verbundene Polyoxometallat(POM)‐Hybridmaterialien haben zunehmendes Interesse geweckt. Diese Hybride wurden traditionell durch das nicht kontrollierbare Verknüpfen von Clustern synthetisiert, das Ergebnis war jedoch nicht vorhersagbar.…
Bimetallic Catalysts for the Efficient Growth of SWNTs on Surfaces
Bimetallic catalysts such as Fe/Ru and Fe/Pt in the size range of 0.5−3 nm are currently being considered for the efficient growth of single-walled carbon nanotubes (SWNTs) on flat surfaces. It has been shown possible, by using chemical reduction under microwave irradiation and poly( N -vinyl-2-pyrrolidone) (PVP) as a…
Layer‐by‐Layer Deposition of Polyelectrolytes—A Versatile Tool for the In Vivo Repair of Blood Vessels
Layer-by-layer adsorption of polygenic polyelectrolytes is a promising method of treatment in which multilayers are formed on the inner arterial wall (see scheme). An advantage of this technique, which has already proved successful in animal models, is that it is very simple to apply, in contrast to in situ polymeriza…
Effects of Finite Carbon Nanotube Length on Sidewall Addition of Fluorine Atom and Methylene
Density functional computations (PBE and B3LYP) in conjunction with 3-21G and 6-31G basis sets are used to determine the energy of fluorine atom and CH(2) addition to the sidewall of (5,5) C(30+10)(n)()H(20) (n = 0, 1, 2.18) carbon nanotube slabs. A pronounced oscillation of the addition energy is found for fluorine a…
Effects of the blending sequence in polyolefin ternary blends
Abstract Ternary blends of isotactic polypropylene (PP), ethylene–octene copolymer (mPE), and high‐density polyethylene (HDPE) were prepared by melt mixing in a twin‐screw extruder with two different sequences of mixing: the simultaneous mixing of the three components (method I) and the premixing of mPE and HDPE follo…
Effects of acrylic‐based processing aids on processibility, rheology, thermal and structural stability, and mechanical properties of PVC/wood–sawdust composites
Abstract Methyl methacrylate and ethylacrylate (MMA‐ co ‐EA) and methyl methacrylate and butylacrylate (MMA‐ co ‐BA) copolymeric processing aids were introduced into poly(vinyl chloride) (PVC)/33.3 wt % wood–sawdust composites containing 0.6 and 2.4 phr of calcium stearate lubricant. The properties of the composites w…
Sensitization and Stabilization of TiO2 Photoanodes with Electropolymerized Overlayer Films of Ruthenium and Zinc Polypyridyl Complexes: A Stable Aqueous Photoelectrochemical Cell
Overlayer thin films of vinylbipyridine (vbpy)-containing Ru and Zn complexes have been formed on top of ruthenium dye complexes adsorbed to TiO(2) by reductive electropolymerization. The goal was to create an efficient, water-stable photoelectrode or electrodes. An adsorbed-[Ru(vbpy)(2)(dcb)](PF(6))(2)/poly-[Ru(vbpy)…