Materials Literature
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Hydrothermal reactions of Na 2 MoO 4 ·2H 2 O and MoO 3 with MCl 2 ·xH 2 O (M = Co, Ni, Cu) and 2,2′-bipyridine yield one- and two-dimensional solids, characterized by molybdenum oxide monomers, clusters and chains linked by {M(2,2′-bpy)} 2+ groups and represented by the formulae [M(bpy) x - (H 2 O) y Mo n O 3n +1 ] (n…
Reversible photoinduced magnetization was observed in a cobalt iron cyanide thin film. Magnetic properties of the prussian blue analog, K 0.4 Co 1.3 [ Fe ( CN ) 6 ] ⋅ 5 H 2 O , can be switched between ferrimagnetic and paramagnetic by visible and near‐IR light illumination. The critical temperature after illumination…
Parent aniline oligomers such as tetramer and “16-mer” have been synthesized by a general method. This method can be used to synthesize other oligomers by selecting appropriate ratios of reactants and appropriate oxidants. The oligomers were characterized by UV/Vis, IR, NMR, mass spectroscopy, GPC and elemental analys…
Using a molecular-dynamics computer simulation we determine the temperature dependence of the partial structure factors for a binary Lennard-Jones system. These structure factors are used as input data to solve numerically the wave-vector-dependent mode-coupling equations in the long-time limit. Using the so-determine…
Volume 20 provides insights on how to improve products and reduce costs by leveraging materials technology in the context of engineering design. It begins with a review of best design practices, identifying roles and responsibilities, workflows and tools, and considerations such as industry standards and codes, enviro…
In the last two decades, a significant effort has been directed to understand the internal charge distributions in dielectrics. This has resulted in the development of a number of methods which give detailed information about space charge distributions. This review presents the evolution of several experimental approa…
A set of principles are outlined for the design of short oligopeptides which will self-assemble in appropriate solvents into long, semi-flexible, polymericβ-sheet nanotapes. Their validity is demonstrated by experimental studies of an 11-residue peptide (DN1) which forms nanotapes in water, and a 24-residue peptide (K…
Alkanethiol molecules containing a polar aromatic group (C 22 H 45 −SO 2 −C 6 H 4 −O−C 4 H 8 −SH) were used to stabilize gold clusters, formed in a two-phase system ( J. Chem. Soc., Chem. Commun. 1994, 801). The gold nanoparticles were investigated using TEM, FTIR, UV/vis and X-ray photoelectron spectroscopy and compa…
Giant Magneto-Impedance (GMI) of films with a layered structure has been studied. They are Co-Si-B/Cu/Co-Si-B, Co-Si-B/Ag/Co-Si-B, and Fe-Co-Si-B/Cu/Fe-Co-Si-B with a magnetic closed-loop structure. They also have a certain magnetic configuration, for which the uniaxial anisotropy is perpendicular to both the driving…
The exchange coupling between the unpaired electrons of divalent first-row transition-metal ions M II (M = Cu, Ni, Co or Mn) bridged by the terephthalate (ta) ligand (intramolecular metal–metal separation ca. 10 Å) has been systematically studied. The following complexes have been synthesized: [Cu 2 (bipy) 4 (ta)][ClO…
The miscibility of poly(4-vinylphenol) (PVPh) and poly(methyl methacrylate) (PMMA) blends has been investigated by FTIR and FT-Raman spectroscopy. Although both techniques provide evidence for the formation of hydrogen bonds between the hydroxyl group of PVPh and the ester group of PMMA, the blends show only a limited…
The decomposition of formic acid on the TiO 2 (110) surface was examined with temperature-programmed desorption (TPD), static secondary ion mass spectrometry (SSIMS), and high-resolution electron energy loss spectroscopy (HREELS). Formic acid decomposed upon adsorption on TiO 2 (110) at 110 K to formate and a proton.…
Cu(II) was used as a probe to investigate the structure and ion binding ability of full-generation poly(amidoamine) starburst dendrimers ( n SBDs). Computer-aided analysis of the EPR spectra provided information on the formation of copper complexes in various internal or external locations of the dendrimers, as well a…
The synthesis, characterization, and vis−NIR−IR vapochromic/spectroscopic studies are reported for isocyanide compounds of the form [Pt(arylisocyanide) 4 ][Pt(CN) 4 ] (where arylisocyanide = p -CNC 6 H 4 C n H 2 n +1; n = 1, 6, 10, 12, 14). The dark blue, solid materials change color in the NIR (near-infrared) spectra…
Polyaniline (PANI), one of the most interesting members of the group of conducting polymers, has been the subject of intense experimental and theoretical studies because of its outstanding behaviour during electrochemical redox processes and during changes of pH. In this work the electrochemical doping and protonation…
Thiol-derivatised nanoparticles of Au, Pt and Ag (diameter 1–10 nm) forming superstructures, are prepared by the acid-facilitated transfer of well characterized particles in a hydrosol to a toluene layer containing the thiol.
In the respiratory system, electron carriers such as ubiqui-none and cytochrome c play an important role in the electron transfer (ET) reaction between oxidoreductases embedded in the mitochondrial membrane. This review focuses on a strategy for constructing porphyrin–electron acceptor pairs via specific interactions…
Near-monodisperse, micrometre-sized poly(N-vinylpyrrolidone)-stabilized polystyrene latexes have been coated with polypyrrole by in situ deposition of the conducting polymer from aqueous solution. If the conducting polymer overlayer is sufficiently thin, it lies inside the steric stabilizer layer and the coated latexe…
The excellent field emission characteristics of carbon nanotube films , i.e., the property that the tips of the nanotubes emit electrons when placed in an electric field, are discussed in some detail. The experimental configurations used (see Figure) and the results obtained are reviewed. It is suggested that carbon n…
Photostructural change in amorphous selenium has been studied in situ by extended x-ray-absorption fine structure at 30 K. The essential features of the amorphous state are in agreement with the previous reports; the average bond length is shortened and the second-nearest-neighbor peak is smeared out, suggesting stren…