Materials Literature
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New surface-modified iron oxide nanoparticles were developed by precipitation of Fe(II) and Fe(III) salts with ammonium hydroxide and oxidation of the resulting magnetite with sodium hypochlorite, followed by the addition of poly( L-lysine) (PLL) solution. PLL of several molecular weights ranging from 146 ( L-lysine)…
We study the changes induced by the effective gauge field due to ripples on the low energy electronic structure of graphene. We show that zero-energy Landau levels will form, associated with the smooth deformation of the graphene layer, when the height corrugation, $h$, and the length of the ripple, $l$, are such that…
The carboxysome is a bacterial microcompartment that functions as a simple organelle by sequestering enzymes involved in carbon fixation. The carboxysome shell is roughly 800 to 1400 angstroms in diameter and is assembled from several thousand protein subunits. Previous studies have revealed the three-dimensional stru…
3D-printed Lunar regolith simulant-based geopolymer composites with bio-inspired sandwich architectures,
Although strong and stiff human-made composites have long been developed, the microstructure of today's most advanced composites has yet to achieve the order and sophisticated hierarchy of hybrid materials built up by living organisms in nature. Clay-based nanocomposites with layered structure can reach notable stiffn…
Forget about ‘the’ solution. Instead, we need to work toward a strong, sustainable mosaic of many solutions.
Abstract The effects of elastomer type on the morphology, flammability, and mechanical properties of high‐impact polystyrene (HIPS)/polystyrene (PS)‐encapsulated magnesium hydroxide (MH) were investigated. The ternary composites were characterized by cone calorimetry, mechanical testing, and scanning electron microsco…
It is demonstrated with powerful evidence that the extraordinary transmission of a metallic grating is undoubtedly due to the excitation of standing surface plasma waves in the Fabry-Perot like resonator. This is the first time that the strong standing waves set up in the groove of a sub-wavelength double-layer gratin…
Abstract Tungsten oxide thin films with protons intercalated during deposition (H x WO 3 ) were prepared using reactive direct‐current magnetron sputtering in a gas mixture of argon, oxy‐gen, and hydrogen. The as‐deposited films were tungsten bronze. The concentration of intercalated protons, given by the x ‐values in…
The crystal structure of the mineral lautite (copper arsenic sulfide), CuAsS, previously described as either centrosymmetric [Pnma; Marumo & Nowacki (1964 ▶). Schweiz. Miner. Petro. Mitt.44, 439-454] or noncentrosymmetric [Pna2(1); Craig & Stephenson (1965 ▶). Acta Cryst.19, 543-547], was reinvestigated by means of si…
Abstract The evolution of the ceria‐praseodymia mixed oxide promoter throughout the successive steps involved in the preparation of a 3% Rh/25% Ce 0.8 Pr 0.2 O 2− x /Al 2 O 3 –3.5% SiO 2 catalyst is studied with the help of X‐ray diffraction (XRD), spatially resolved electron energy loss spectroscopy (EELS), XPS, and…
Thermodynamic properties of molten Al-Mn, Al-Cu and Al-Fe-Cu alloys in a wide temperature range of 1123-1878 K and the whole range of concentrations have been studied using the integral effusion method and Knudsen mass spectrometry. Thermodynamic functions of melts were described by the associated solution model. The…
The complex charge ordering phenomena for polycrystalline La(1-x)Sr(x)FeO(3) (1/3≤x≤2/3) have been studied by measuring the low temperature magnetization, resistivity and the longitudinal ultrasonic velocity (V(l)). At low doping levels (1/3≤x≤0.5), a dramatic velocity increase is observed below 210 K, and the relativ…
Abstract The improvement of the properties of commingled plastics was carried out with a prototype blend of Mexican municipal plastic waste with and without poly(vinyl chloride) (PVC). Compatibilizing agents such as high‐density, low‐density, and linear low‐density polyethylenes modified with maleic anhydride were use…
Abstract Ellipsometric porosimetry (EP) has recently appeared to be a suitable non‐destructive technique for the characterization of porous ultra low‐κ (ULK) dielectrics. The analysis of ellipsometric spectra of a film during adsorption and desorption cycles of an adsorptive, allows the determination of its open pore…
Polycrystalline Ni nanowires have been prepared by electrochemical deposition in an anodic alumina membrane template with a nanopore size of about 60 nm. In situ heating extended x-ray absorption fine structure and x-ray diffraction techniques are used to probe the atomic structures. The nanowires are identified as be…
Ba 5 In 0.93 Mn 4 O 14.40 was synthesized in air at 1300 °C by traditional solid state reaction and structurally characterized using powder X-ray diffraction, neutron diffraction, and selected area electron diffraction (SAED). It crystallizes in the hexagonal space group P 6 3 / mmc with a = 5.7389(1) Å and c = 23.641…
Catalytic trimerization of isobutene to produce triisobutenes has been performed over cation-exchange resin and zeolite catalysts. Resin catalysts have the advantage of long lifetime and high trimers selectivity even though the regeneration of an aged catalyst is not satisfactory. On the contrary, zeolite catalysts ca…
The leading electronic interactions governing the local physics of the CE phase of half-doped manganites are extracted from correlated ab initio calculations performed on an embedded cluster. The electronic structure of the low-energy states is dominated by double exchange configurations and $\mathrm{O}\phantom{\rule{…
Abstract The application of spectroscopic processing techniques to multi‐spectral XPS data sets has enabled the acquisition of quantitative surface chemical state images. Such data sets are necessarily large, incorporating many spectra, so prohibiting interactive processing. Instead multivariate analytical techniques…