Materials Literature
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We report the production and characteristics of natural cellulose fibers obtained from the leaves and stems of switchgrass. In this paper, the composition, structure and properties of fibers obtained from the leaves and stem of switchgrass have been studied in comparison to the common natural cellulose fibers, such as…
Defected fullerenes in nanopeapods form bonds with the encapsulating single-walled carbon nanotubes when irradiated by an electron beam leading to changes in the guest (fullerene) and the host (nanotube). Intrinsic reaction coordinate (IRC) analysis based on B3LYP hybrid density functional theory shows that a C1-C59 d…
A large number (>60) of nitrogen-containing type Ia natural diamonds, and nitrogen-free type IIa natural and synthetic diamonds, have been electron irradiated and their optical absorption spectra have been analysed in detail. The analysis reveals that the concentrations of vacancies [V] and interstitials [I0 ] in type…
Abstract Spintronik ist ein multidisziplinäres Forschungsfeld zwischen Physik, Material‐ und Ingenieurwissenschaften, aber auch ein neuer Forschungsbereich der Festkörperforschung. Für die verschiedensten Anforderungen müssen unterschiedlichste Materialien gefunden werden. Die Suche nach ferromagnetischen Halbleitern…
Propionic acid tethering hemicyanine dye molecules preferentially enter the channels of silicalite-1 films with the head part first, in water in the presence of tetrabutylammonium hydroxide (this is shown schematically in the figure), giving rise to high-concentration hemicyanine-incorporating silicalite films with hi…
Crystals of a hydrazinium-based copper(I) sulfide salt, N4H9Cu7S4 (1), have been isolated by an ambient temperature solution-based process. In contrast to previously reported hydrazinium salts of main-group metal chalcogenides, which consist of isolated metal chalcogenide anions, and ACu7S4 (A = NH4+, Rb+, Tl+, K+), w…
Nickel (Ni) nanoparticle‐dispersed amorphous silica (Si–O) powders were synthesized from chemical solution precursors. The high‐temperature hydrogen adsorption property of the precursor‐derived composite powders was investigated in comparison with the amorphous Si–O and Ni at 773 K. Among the three powder samples, Ni…
Relative displacements between the atomically smooth, nested shells in multiwalled carbon nanotubes (MWNTs) can be used as a robust nanoscale motion enabling mechanism. Here, we report on a novel method suited for structuring large arrays of MWNTs into such nanobearings in a parallel fashion. By creating MWNT nanostru…
A simple numerical approach for calculating the q -dependence of the scattering intensity in small-angle X-ray or neutron scattering (SAXS/SANS) is discussed. For a user-defined scattering density on a lattice, the scattering intensity I ( q ) ( q is the modulus of the scattering vector) is calculated by three-dimensi…
Low‐cost α‐silicon carbide (SiC) starting powder, instead of the more expensive β‐SiC starting powder, has been used to process liquid‐phase‐sintered (LPS) SiC ceramics with different microstructures: (i) elongated SiC grains ( in situ toughened LPS SiC), (ii) fine equiaxed SiC grains, and (iii) coarse equiaxed SiC gr…
CeF(3):Tb(3+) nanoparticles (short pillar-like morphology with an average length and width of 11 and 5 nm, respectively) were successfully prepared by a polyol process using diethyleneglycol (DEG) as solvent. After being functionalized with a SiO(2)-NH(2) layer, these CeF(3):Tb(3+) nanoparticles can be conjugated with…
Multilayer coatings of colloidal particle substrates (see figure) formed entirely from block copolymer micelles are demonstrated. Such multilayer coatings provide a highly functional organized coating that may have application across a wide range of technology areas, and provide a coating mechanism for controlled load…
Self-assembly of metal-complexed lipid nanotubes results from the simple mixing of two aqueous solutions containing a metal cation and an oligoglycine-based lipid under mild conditions. Mn2+, Fe3+, and Cu2+ in octahedral coordinations tend to form tubular structures with the lipids examined. Calcination using the Cu2+…
Electrospray ionization time-of-flight mass spectrometry (ESI-TOF MS) and gel permeation chromatography (GPC) were used to study the synthesis of a series of tiopronin monolayer-protected gold nanoclusters (MPCs) and to monitor their postsynthesis peptide ligand place-exchange reactions. All mass spectra identified th…
A new algorithm is presented that evaluates the critical dimension (CD) of nanostructures from scanning electron microscopy (SEM) images. The algorithm is based on the physical modelling of the SEM image formation and evaluates both top and bottom CDs. The SEM intensity profile is modelled by a piecewise-defined conti…
Here we report on the magnetic properties of iron carbide nanoparticles embedded in a carbon matrix. Granular distributions of nanoparticles in an inert matrix, of potential use in various applications, were prepared by pyrolysis of organic precursors using the thermally assisted chemical vapour deposition method. By…
Novel water-soluble polymeric photosensitizers based on the natural polymer chitosan were synthesized and studied. The modified chitosans contain covalently attached Rose Bengal. The polymers absorb light from the visible spectral region and generate singlet oxygen. They can serve as environmentally friendly, biodegra…
Texture analysis with microbeam scanning diffraction enables the local mapping of three-dimensional crystallite orientation in heterogeneous natural and synthetic materials. Cortical (compact) bone is an example of a hierarchically structured biocomposite, which is built mainly of cylindrical osteons, having a lamella…
A new approach to the synthesis of the lanthanide orthovanadates CeVO 4, PrVO 4, and NdVO 4 is proposed. These compounds exhibit a tetragonal zircon structure, crystallizing in the space group I 4 1 / amd with a = 7.3733(4) Å, c = 6.4909(4) Å, and Z = 4. The crystal structure has been analyzed by powder X-ray diffract…
CdSeS nanocrystals with different bandgap energies have been synthesized by the colloidal method. The solution blend of blue-, green- and red-emitting CdSeS nanocrystals, in appropriate proportions, showed strong white emission of different shades on excitation with a UV source. We observed that the CIE coordinate of…