Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
In this work, we prepared few-layered graphene (FLG) films and investigated their thermoelectric properties. It was found that pristine FLG films showed a low thermopower of ∼40 μV/K. We further processed these FLG films by attaching them with 1,1′-azobis(cyanocyclohexane) or 1,3,6,8-pyrenetetrasulfonic acid. The ther…
The lateral shifts from a slab of lossy chiral metamaterial are predicted for both perpendicular and parallel components of the reflected field, when the transverse electric (TE)-polarized incident wave is applied. By introducing different chirality parameter, the lateral shifts can be large positive or negative near…
Abstract Temperature‐ and frequency‐dependent dielectric behaviour has been investigated for pristine, iodine‐doped and annealed polyetherimide (PEI) in the temperature range 303–523 K at various frequencies (120 Hz, 1 kHz, 10 kHz and 100 kHz). In pristine PEI, the rapid decrease in the dielectric constant (ε′) in the…
Based on ab initio density functional calculations, we have investigated the validity of the recently proposed “intermediate site/bond-centered charge ordering” in insulating magnetite, Fe 3 O 4 . It is found that, although the Fe B 2+ /Fe B 3+ bond dimerization along the monoclinic b direction leads to local electric…
A synthetic method is proposed for the preparation of micrometer-sized hybrid materials in the form of highly stable, water-soluble, porous, and intrinsic fluorescent vaterites. This is an easy, cost-effective, and polymer-free synthetic method, that is, free of any supplementary complex synthetic or natural macromole…
Multiwalled carbon nanotubes (MWCNTs) were deposited from solution phase onto the nanostructured CeO 2 films grown on a sapphire substrate. High-resolution images by scanning electron microscopy showed that MWCNTs laid on the top of CeO 2 islands. Raman shifts of these combinatorial materials showed considerable depen…
Abstract Der aktuelle Anstieg bei den Verbraucherprodukten, die Nanomaterialien enthalten, als auch die Prognose zu den neuen Entwicklungen zu Anwendungen mit Nanopartikeln oder anderen Nanostrukturen bringt bei verschiedenen Organisationen, aber auch bei der Bevölkerung die Befürchtung auf, dass hier auch neue gesund…
Hydrotalcites (HTs) are an important class of heterogeneous catalysts for a wide variety of traditionally base-catalyzed organic transformations and have been considered as an alternative to homogeneous catalysts in the transesterification of fats/oils in biodiesel production. Previous experimental observations show t…
New order: Ce2Zr2O8 nanocrystals are characterized by aberration-corrected electron microscopy, core-loss electron energy-loss spectroscopy, and simulations. Direct chemical evidence of an ordered cation sublattice in nanosized (20–30 nm) crystallites is found for the first time. Local deviations in the chemical compo…
We investigated an effect of spin dilution on the magnetic and thermal properties of delafossite CuCrO 2 having an S = 3/2 antiferromagnetic triangular lattice (ATL) by the substitution of Al 3+ for Cr 3+ by measurements of magnetization, specific heat, and neutron scattering. Spin defects introduced into Cr ATL layer…
Selektives Gedächtnis: Die Verwendung von Actinoiden in molekularen Nanomagneten könnte wegen der speziellen Eigenschaften der 5f-Elektronenschale zu verbesserten Materialien mit höheren Anisotropiebarrieren führen. Für Neptunocen wurde ein offener magnetischer Hysteresezyklus bei tiefen Temperaturen gefunden (siehe B…
Nanocomposites from polyethylene and TiO2 with different shape and size were prepared by direct mixing and masterbatch dilution, respectively. The mechanical properties of nanocomposites were determined and discussed in relation to the nanofiller dispersion. Moreover, the morphological aspects of polyethylene with and…
The absorption spectra of 5 nm noble metal nanoparticles (Ag, Au, and Cu) with typical morphologies of multiply twinned particles (MTPs) and single crystals are calculated by using the discrete dipole approximation method. Among the considered morphologies, it is found that icosahedral, cuboctahedral and truncated oct…
The "Swedish slow motion theory" [Nilsson and Kowalewski, J. Magn. Reson. 146, 345 (2000)] applied so far to Nuclear Magnetic Relaxation Dispersion (NMRD) profiles for solutions of transition metal ion complexes has been extended to ESR spectral analysis, including in addition g-tensor anisotropy effects. The extended…
Intelligente photoschaltbare Foldamere, die ausschließlich aus Azobenzol-Einheiten bestehen, nehmen im Dunkeln stabile helicale Formen an. Sie lassen sich durch UV-Strahlung leicht und reversibel entfalten, erkennbar durch verschwindende Circulardichroismus-Signale (siehe Bild). Die Variation der Oligomerlänge führt z…
An attractive couple: (Pro2H+)2(TCNQ.−)2⋅TCNQ (TCNQ=tetracyanoquinodimethane) contains an H-bonding network that supports a layered structure, composed of alternating TCNQ anions and proline cations (see picture). The cation is formed by two zwitterionic proline amino acids supported by a proton bridge between the car…
The effect of isophorone diisocyanate-polyhydroxyl groups as a coupling agent on properties of low density polyethylene/acrylonitrile butadiene styrene/water hyacinth fibers (LDPE/A0BS/WHF) composites was studied. LDPE/ABS (50/50) blends with different unmodified and modified water hyacinth fibers (WHF) loading were p…
Epoxy nanocomposites were prepared by addition of organo-montmorillonite (OMMT). The intercalation-ability of the OMMT was characterized using X-ray diffraction (XRD). The fracture toughness of the epoxy/OMMT nanocomposites was examined using single edge notched bending (SENB) tests. The OMMT (1–4 wt%) was successfull…
It is shown that the presence of nano-sized and nano-structured erosion products not only affects the operation of thermonuclear devices but also, to a large extent, determines the safety and economy of future thermonuclear reactors. The formation mechanisms and the characteristics and properties of deposited films an…
Abstract Although the complete mechanisms are not yet fully understood, it is well established that the secondary phase particle (SPP) size distribution and chemical composition have a crucial affects in the reactor corrosion rate and hydrogen uptake in boiling water reactor (BWR) cladding. To further study these effe…