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。
A Trojan horse PRINT particle composition was developed that incorporates a reductively labile cross-linker to achieve activated release of doxorubicin in vitro. Particles of discrete size and shape (cube side length = 2 micron) containing 30 wt % of a disulfide-based cross-linker and 2 wt % doxorubicin were synthesiz…
We investigate the superspin-glass behavior of a concentrated assembly of interacting maghemite nanoparticles and compare it to that of canonical atomic spin-glass systems. ac versus temperature and frequency measurements show evidence of a superspin-glass transition taking place at low temperature. In order to fully…
BACKGROUND/AIM: Aging of skin is accompanied by decrease of skin elasticity. Using the noninvasive suction device Cutometer, we evaluated the age and regional body differences of the viscoelastic properties of human skin. The objectives of this study were to evaluate the correlation between age and the biomechanical p…
Abstract Tomography provides three-dimensional images of heterogeneous materials or engineering components, and offers an unprecedented insight into their internal structure. By using X-rays generated by synchrotrons, neutrons from nuclear reactors, or electrons provided by transmission electron microscopes, hitherto…
Directed combination of {Ni6PW9} building blocks with various rigid carboxylate linkers under hydrothermal conditions yields a series of unprecedented polyoxometalate–organic frameworks (POMOFs) with remarkable structural diversity including 1D, 2D, and 3D structures based on monomers, dimers, or infinite helical chai…
New memory concepts may lead to computer systems that do not require a lengthy start-up process when turned on.
Dendrimers up to the fourth generation were successfully prepared via the divergent growth strategy using a combination of thiol-ene "click" chemistry and traditional esterification reactions. The thiol-ene reactions were conducted under solvent-free, ambient conditions at room temperature by irradiating with UV light…
The cost-effective production of flexible electronic components will profit considerably from the development of solution-processable, organic semiconductor materials. Particular attention is focused on soluble semiconductors for organic field-effect transistors (OFETs). The hitherto differentiation between "small mol…
The design andsynthesis of basic porphyrin building blocks for the con-struction of highly ordered systems often require incorpo-ration of different peripheral substituents. The synthesis ofporphyrins bearing specific patterns of functionality is stillchallenging task in spite of the ample presence of reportedprocedur…
The spin Hamiltonian (SH) parameters g factors g‖, g⊥and the hyperfine structure constants A‖and A⊥for the tetragonal Cu2+centers (i.e., [ CuX4( H2O )2] clusters) in NH4X ( X = Cl, Br, I ) are theoretically investigated by means of the diagonalization procedure of complete (10×10) energy matrix (DPCEM) for a 3d9ion in…
Lead(II) 4,4,4-trifluoro-1-phenyl-1,3-butandionate (TFPB−) complexes with 1,10-phenanthroline (phen) and 2,2′-bipyridine (2,2′-bipy), [Pb(L)(TFPB)2], have been synthesized and characterized by elemental analysis, IR-, 1H NMR spectroscopy and studied by X-ray crystallography. The self-assembly of [Pb(L)(TFPB)2] complex…
Current transport in carbon nanotube field effect transistors (CNT-FETs) has been modeled from charge distributions and the potential inside the carbon nanotube. Analytical equations describing I-V characteristics of the CNT-FETs have been obtained from the combination of diffusion and drift mechanisms in the channel…
We report the synthesis and evaluation of thermal behavior of two new mesogenic homologous series of liquid crystalline compound containg 1,2,4-triazole and isonicotinic acid ring at the terminus of the molecule viz. 4-[(4H-1,2,4-triazol-4-ylimino) methyl] phenyl 4-alkoxybenzoate and 4-(2-isonicotinoylcarbonohydrazono…
Abstract The objective of this work is to study the optical and electrical properties of tantalum nitride and tantalum barrier thin films used against copper diffusion in Si in integrated circuits using spectroscopic ellipsometry in the VUV and UV–visible range. Single layers of tantalum nitride and bilayer films of T…
In the nuclear industry, large volumes of liquid wastes with a low radioactivity have to be treated. The method which is commonly applied to remove contaminants consists of the use of an insoluble finely divided solid material formed in situ by precipitation in the waste stream. In this study, a new mathematical appro…
Abstract The dielectric constant (ε′), dielectric loss index (ε″), direct‐current conductivity, and current–voltage (I–V) characteristics of pure poly(vinyl chloride) (PVC) and blends of PVC and bisphenol A/Egyptian corncobs (BCC) were investigated at different temperatures. The relaxation processes for PVC and its bl…
Abstract KDP crystals were rapidly grown from solution doped with different Ba2+ concentrations. The effects of Ba2+ on the growth rate, morphology and quality of KDP crystals were discussed. Significant changes in shapes and volume of the grown crystals have been observed. During the growth process, defect region exp…
The single mutants (F165A, E192A, F196A, S392A, T393A) at and near the main hinge (beta-strand L) of human 3-phosphoglycerate kinase (hPGK) exhibit variously reduced enzyme activity, indicating the cumulative effects of these residues in regulating domain movements. The residues F165 and E192 are also essential in mai…
Semiconductor, Poly(vinyl pyrrolidone), Chemical reduction, SeleniumElemental selenium (Se) is a narrow band gap (~1.7 eV)semiconductor which has been extensively used in solarcells, xerography and rectifiers. It is also a photoconductorwith a relatively low melting point (~217 °C), high refrac-tive index and high rea…
ZnO/cubic (Zn, Mg)O core–shell heterostructure nanorods with wire-shaped tips have been synthesized via a catalyst-free thermal evaporation process on Si substrates. The average diameters were about 180 nm for nanorods and about 20 nm for tips. Transmission electron microscopy (TEM) investigations revealed that the ti…