Materials Literature
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Electromagnetic interference (EMI) shielding effectiveness (SE) of multi-walled carbon nanotubes-polymethyl methacrylate (MWCNT-PMMA) composites prepared by two different techniques was measured. EMI SE up to 40 dB in the frequency range 8.2-12.4 GHz (X-band) was achieved by stacking seven layers of 0.3-mm thick MWCNT…
Epoxidation made easy: Subnanometer gold clusters immobilized on amorphous alumina result in a highly active and selective catalyst for propene epoxidation. The highest selectivity is found for gas mixtures involving oxygen and water, thus avoiding the use of hydrogen. Ab initio DFT calculations are used to identify k…
A detailed investigation using variable temperature powder neutron diffraction demonstrates that ${\mathrm{BiFeO}}_{3}$ undergoes a phase transition from the ferroelectric $\ensuremath{\alpha}$ phase (rhombohedral, $R3c$) to a paraelectric $\ensuremath{\beta}$ phase (orthorhombic, $Pbnm$) between $820\text{ }\ifmmode^…
Density-functional theory computations on a cluster Au 144 (SR) 60 with an icosahedral Au 114 core with 30 RS−Au−SR units protecting its surface yield an excellent fit of the structure factor to the experimental X-ray scattering structure factor measured earlier for 29 kDa thiolate-protected gold clusters. This cluste…
In this study, activated carbon (AC)-Fe 3 O 4 nanoparticles asymmetric supercapacitor cells have been assembled and characterized in 6 M KOH aqueous electrolyte for the first time. The nanostructure Fe 3 O 4 was prepared by the microwave method. It only cost several minutes to prepare magnetite nanoparticles with aver…
Transport through potential barriers in graphene is investigated using a set of metallic gates capacitively coupled to graphene to modulate the potential landscape. When a gate-induced potential step is steep enough, disorder becomes less important and the resistance across the step is in quantitative agreement with p…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” opt…
The book contains 13 papers from the symposium on carbon dioxide reduction metallurgy 2009 and 14 papers from the symposium TMS 2009 annual and exhibition: Energy conservation in metals extraction and materials processing II. Papers include: Recent developments in carbon dioxide capture materials and process for energ…
Abstract G3(MP2)//B3LYP calculations have been carried out on trans ‐ and cis ‐decalin, and their mono‐, di‐, tri‐, and tetraoxa‐analogs. The main purpose of the work was to obtain enthalpies of formation for these compounds, and to study the relative stabilities of the cis – trans and positional isomers of the variou…
Electrochemical n- and p-doping of a supramolecular assembly of single-walled carbon nanotubes (SWNTs) with a heteroleptic Ru(II)−bipyridine complex (coded Z-907Na) was studied by in situ Raman spectroelectrochemistry with laser excitation energies of 2.18 and 2.41 eV. Whereas the Raman lines assigned to the nanotube…
Free standing, nanoporous alumina templates were fabricated as transmission masks from aluminium using a two-step anodization process followed by acid etching. The resulting membrane comprises self-ordered, periodic arrays of non-connecting circular channels which can be prepared with pore diameters <100 nm and with m…
The local chemical environment of Nd3+, Eu3+, and Er3+ luminescent centers in various lead germanate glasses has been investigated by means of extended x-ray absorption fine structure at the Ln LIII edges. The main result of this investigation is that for all the Ln3+ ions the first coordination sphere is more symmetr…
We describe a simple method for the controlled mixing of particles that could be used to produce materials with new properties. We demonstrate the procedure with sets of silica particles that have each been coated with one of two different organic thin films. One set of particles is functionalized with carboxylic acid…
Two-dimensional two-phase heterostructures have been the subject of many investigations including computer simulations. An outstanding issue is the shape analysis of the reflectance for dielectric inclusions of arbitrarily complex geometry. We report on finite element numerical calculations to investigate the effects…
ZnO thin films grown by metal-organic vapor phase epitaxy along the nonpolar [formula: see text] direction and exhibiting semipolar [formula: see text] facets have been chemically etched with HCl. In order to get an insight into the influence of the ZnO wurtzite structure in the chemical reactivity of the material, Ke…
We report the growth of a Nd-doped calcium barium niobate (Nd:CBN-28) single crystal using the Czochralski method. The point group and space group of Nd:CBN-28 are determined to be tetragonal 4mm and P4bm, respectively, and the effective segregation coefficients of Nd, Ca, Ba, and Nb are 0.988, 1.029, 0.992, and 0.985…
Porous anodic aluminium oxide (AAO) membranes with ordered nanopore arrays were fabricated electrochemically in the mixture electrolytes with various volume ratios of 0.3 M H2SO4 and 0.3 M C2H2O4. Photoluminescence (PL) properties of as-prepared AAO membranes were investigated. It was found that a 290 nm emission was…
A field-assisted solid-state ion exchange technique is used for the first time to dope surface layers of silicate glasses with erbium at the concentration of the order of a few 10(20) Er cm(-3). Rutherford backscattering spectrometry, extended x-ray absorption fine structure spectroscopy and photoluminescence spectros…
A simple method for synthesis of manganese(II) coordination polymers with different benzoate ligands and pyridine N-oxide having general composition [Mn(RC6H4CO2)2(PyO)] n is presented (where PyO = pyridine N-oxide and R = H, 1a; R = 4-NO2, 1b; R = 4-Cl, 1c; R = 4-OH, 1d; R = 2-NO2, 1e). All these polymers are charact…
Duplex stainless steels have many superior properties compared to conventional steels, this being mainly due to their microstructure containing approximately equal amount of ferrite and austenite phases formed by iron, chromium (or Cr equivalent), and nickel (or Ni equivalent). Using computational methods based on fir…