Materials Literature
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Abstract Biologisch aktive Verbindungen, die auf Licht reagieren, bieten experimentelle Möglichkeiten, die sonst nur sehr schwierig zu realisieren sind. Da Licht z. B. mit Lasern und (konfokalen) Mikroskopen punktgenau eingesetzt werden kann, sind schnelle Konzentrationssprünge der aktiven Form von Molekülen mit exakt…
The design and fabrication of complex nanostructures with specific geometry and composition is one of the main challenges of nanotechnology. Here we demonstrate the devise of metal-insulator-metal, trilayered, coaxial nanocables. Such coaxial geometry may give rise to useful and unique electromagnetic properties. We h…
Semiempirical interatomic potentials for hcp elements, Ti and Zr, have been developed based on the MEAM (modified embedded-atom method) formalism. The new potentials do not cause the stability problem previously reported in MEAM for hcp elements, and describe wide range of physical properties (bulk properties, point d…
No need to FRET: An efficient chemiluminescence resonance energy transfer (CRET) between luminol and CdTe quantum dots (QDs) is demonstrated. The system is based on horseradish peroxidase (HRP)–QD conjugates and the luminol/hydrogen peroxide chemiluminescence reaction. Multiple QD acceptors with different emission wav…
The plasmon resonances of a concentric metallic nanoshell arise from the hybridization of primitive plasmon modes of the same angular momentum on its inner and outer surfaces. For a nanoshell with an offset core, the reduction in symmetry relaxes these selection rules, allowing for an admixture of dipolar components i…
In this report, we compare the toxicological effects between pure carbon multiwalled nanotubes (MWNTs) and N-doped multiwalled carbon (CNx) nanotubes. Different doses of tubes were administered in various ways to mice: nasal, oral, intratracheal, and intraperitoneal. We have found that when MWNTs were injected into th…
Abstract Biologically active compounds which are light‐responsive offer experimental possibilities which are otherwise very difficult to achieve. Since light can be manipulated very precisely, for example, with lasers and microscopes rapid jumps in concentration of the active form of molecules are possible with exact…
We investigate the coupling of a single molecule to a single spherical gold nanoparticle acting as a nanoantenna. Using scanning probe technology, we position the particle in front of the molecule with nanometer accuracy and measure a strong enhancement of more than 20 times in the fluorescence intensity simultaneous…
We review the present state of polymer nanocomposites research in which the fillers are single-wall or multiwall carbon nanotubes. By way of background we provide a brief synopsis about carbon nanotube materials and their suspensions. We summarize and critique various nanotube/polymer composite fabrication methods inc…
Abstract Orbital period variations of two neglected Algol type binaries, CC Her and XZ Aql, are studied based on all available times of minima. In the case of CC Her, it is found that the O – C curve displays a tilted sinusoidal variation with an eccentricity of 0.54 ± 0.03 and a period of 52.4 ± 0.4 yr, which can be…
The aggregative behaviors of hydroxypropylcellulose (HPC) molecules in aqueous solution and on substrates have been observed by employing laser light scattering (LLS) and, after deposition on a mica surface, atomic force microscopy (AFM). LLS studies showed that the HPC molecules formed large aggregates through self-a…
The title compound, poly[samarium(III)-tri-μ-formato], [Sm(HCO2)3]n, is isostructural with numerous lanthanide formates and comprises a three-dimensional framework assembled from SmO9 polyhedra and HCO2− anions. The Sm atom lies on a site of 3m symmetry and is coordinated by nine O atoms in a typical coordination geom…
Samples of kirkiite from the high temperature fumaroles of La<sup> </sup>Fossa crater of Vulcano (Aeolian islands, Italy) were chemically<sup> </sup>and structurally investigated in this work. Associated minerals<sup> </sup>are vurroite, bismuthinite, galenobismutite, cannizzarite, lillianite,<sup> </sup>heyrovsk<img…
Molekulare Leiter: Ein neuer, modifizierbarer Elektronenacceptor mit 5,6,11,12-Tetraazanaphthacen(TANC)-Gerüst wurde in Kupfer(I)-TANC-Koordinationspolymere eingebaut (siehe Bild). Die Leitung in hoch leitfähigen Kristallen dieser Polymere kann als 1D-Hopping-Mechanismus beschrieben werden und beruht auf fehlgeordnete…
In order to correct secondary longitudinal chromatic aberration in conventional refracting optical systems, it is necessary to use at least one optical material having anomalous partial dispersion. A novel lens system with correction of the secondary spectrum by using only normal glasses is presented. The lens system…
We report a novel dielectric anomaly around the Jahn–Teller orbital order–disorder transition temperature T JT in LaMnO 3+δ . The transition has been characterized by resistivity (ρ) versus temperature ( T ), calorimetry, and temperature dependent x-ray diffraction studies. Measurements of complex dielectric permittiv…
Abstract Clay‐polypropylene (PP) nanocomposites (NCs) were prepared by melt processing. Two types of PP with different levels of crystallinity were used. Mixtures of the two PPs were made at different ratios that generate a varying degree of crystallinity for the final NC samples. The level of micro‐ and nanodispersio…
A manganocolumbite with nominal composition MnNb 2 O 6 has been prepared under air in order to characterize its electrical behavior. Although powder X-ray diffraction indicates the presence of a single phase, electrical and microscopic characterization reveals two different bulk responses. The origin of these two bulk…
Gly-Arg-Gly-Asp-Ser (GRGDS) was modified by conjugation to lauric acid (LA) to facilitate incorporation into the matrix of a poly(carbonate-urea)urethane (PCU) used in vascular bypass grafts. GRGDS and LA-GRGDS were synthesized using solid phase Fmoc chemistry and characterized by high performance liquid chromatograph…
Farbwechsel: Goldnanopartikel (GNPs), die mit einem Kronenether und Liponsäure funktionalisiert sind, eignen sich für den raschen Nachweis von Analyten mit dem bloßen Auge. Beim Brechen der Wasserstoffbrücken zwischen aggregierten GNPs unter Bildung einer Dispersion tritt eine Farbänderung ein. So lässt sich beispiels…