Materials Literature
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Better oxygen reduction catalysts are needed to improve the efficiency and lower the cost of fuel cells. Metal nanoparticles are good candidates because their catalytic properties can differ from bulk metals. Using density functional theory calculations, we studied the geometric relaxation of metal nanoparticles upon…
The aim of this study was to modify the surfaces of magnetic iron oxide nanoparticles (IOPs) with gelatin in order to reduce cytotoxicity and enhance cellular uptake. The gelatin-coated IOPs were characterized in terms of their functionalization, size, surface charge, morphology and crystalline structure using Fourier…
Magnetic nanowires were obtained through the in situ synthesis of magnetic material by Fe-controlled nanoprecipitation in the presence of two different protein (human serum albumin (HSA) and lysozyme (Lys)) fibrils as biotemplating agents. The structural characteristics of the biotemplates were transferred to the hybr…
This paper presents a simple method to produce radial liquid crystal (LC) alignment layers using circular rubbing of poly( N -vinyl carbazole) (PVK) films. The produced layer can be used for fabricating axially symmetric homogeneous–radial, homeotropic–radial and radial–radial LC alignment devices by combining a rubbe…
Three high-pressure polymorphs of the hydrogen storage material calcium borohydride [Ca(BH${}_{4}$)${}_{2}$] are predicted from structural analogs of the high-pressure titanium dioxide (TiO${}_{2}$) polymorphs baddeleyite, columbite, and cotunnite. Their phase stabilities with respect to the three experimentally chara…
Magnetic drug targeting allows accumulation of drug at a defined target site with the help of an external magnetic field. Current research explored uptake and anticancer activity of doxorubicin-loaded gelatin-coated magnetic iron oxide particles (DXR-GIOPs) in order to investigate potential of gelatin-coated iron oxid…
The durability of glass fiber-reinforced plastic (GFRP) composites made from neat epoxy and organoclay nanocomposite in the alkaline environment is studied. Accelerated tests are performed by immersing the composite plates in the alkaline solution at 60°C. The tensile test and dynamic mechanical thermal analysis test…
Au supported on CeO(2) prepared by deposition-precipitation with urea leads to a basic catalyst. Au acts in two ways as surface modifier. First, Au selectively interacts with Ce(4+) cations by either blocking access to or reducing Ce(4+) to Ce(3+). Second, the resulting Au atoms (presumably as Au(+) ions) act as soft,…
The semiconductor-insulator phase transition of the single-layer manganite ${\mathrm{La}}_{0.5}{\mathrm{Sr}}_{1.5}{\mathrm{MnO}}_{4}$ has been studied by means of high-resolution synchrotron x-ray powder diffraction and resonant x-ray scattering at the Mn $K$ edge. We conclude that a concomitant structural transition…
In this study, EVA/clay nanocomposites were prepared by two different methodologies i.e. melt blend technique and solution blend technique. Comparative analyzes of morphological and thermal properties of the nanocomposites fabricated by two different methods were done. The modified solution method was found to be an e…
Using a combination of density functional theory (DFT) calculations and experiments, we determine the structural and electronic properties of cerium orthophosphate (CePO${}_{4}$), a promising proton-conducting electrolyte for fuel cell applications. To better account for strongly-localized Ce 4f electrons, we use a DF…
$^{75}\mathrm{As}$ and $^{139}\mathrm{La}$ NMR and nuclear quadrupole resonance (NQR) studies on Zn-substituted LaFeAsO${}_{0.85}$ have been performed to microscopically investigate the Zn-impurity effects. Although superconductivity in LaFeAsO${}_{0.85}$ disappears by 3% Zn substitution, we found that NMR/NQR spectra…
We prepared poly(styrene- b -butadiene- b -styrene) (SBS) matrix composites in which multiwalled carbon nanotubes (MWCNTs) were homogeneously dispersed, and their morphologies, thermal properties, and mechanical properties were investigated. The incorporation of MWCNTs into the SBS matrices improved their thermal and…
Abstract: Graphene sheets were prepared by using chemical reduction of a colloidal suspension of graphene oxide sheets in water. After hydrophilic treatment and chemical plating, a layer of nickel particles was uniformly coated on the surfaces of the graphene sheets. The morphologies of the pure graphene (GF) and Ni-c…
This work focuses on the effect of the unique molecular structure of OBC (olefin block copolymer) constituted by soft blocks and hard blocks on the compatibility of OBC/iPP (isotactic polypropylene) blends. Two OBCs with high and low octene content were selected to blend with iPP. The thermal behavior, morphology, and…
The magnetic, electronic, and Mössbauer spectral properties of [Fe(2)L(μ-OAc)(2)]ClO(4), 1, where L is the dianion of the tetraimino-diphenolate macrocyclic ligand, H(2)L, indicate that 1 is a class III mixed valence iron(II∕III) complex with an electron that is fully delocalized between two crystallographically inequ…
A hollow victory: A multifunctional polymerizable ionic liquid (IL)-based surfactant is used in the synthesis of silica spheres with tunable size. Hollow capsules with a mesoporous polymer-network shell and pendant IL moieties are then fabricated by template synthesis (see picture). The pore size of the shell is rever…
Monodispersed CdS nanocrystals with controllable shape and phase have been successfully synthesized in this study by adding cationic surfactant in noninjection synthesis system. With the increase of the amount of cetyltrimethylammonium chloride (CTAC) added, the shape of the CdS nanocrystals changed from spherical to…
Changing your genes: Isomerization around the central NN double bond of an azobenzene causes pronounced structural and spectral differences between the trans and the cis isomers. This can be used as a photochromic switching mechanism, possibly to selectively switch gene expression in a spatially and temporally contro…
BACKGROUND: Local drug delivery has substantial potential to prevent infections compared with systemic delivery. Although calcium sulfate (CaSO(4)) has been studied for local drug delivery and two types are commercially available, it is unknown whether they differentially release antibiotics. QUESTIONS/PURPOSES: We de…