Materials Literature
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We present the role of Pd ensembles in the selective direct synthesis of H 2 O 2 from H 2 and O 2 on a PdAu alloy surface based on periodic density functional theory calculations. Our calculations demonstrate that H 2 O 2 formation is strongly affected by the spatial arrangement of Pd and Au surface atoms. In particul…
The inner-shell single and double ionization spectra of the organic molecule para-aminophenol are calculated using many-body Green's function methods. The inner-shell double ionization spectrum displays more pronounced sensitivity to the chemical environment and to electronic many-body effects than does the inner-shel…
Many reports have been published about the biogenesis of silver nanoparticles using several plant extracts such as Pelargonium graveolens (P.graveolens- geranium) and Azadirachta indica (neem) but the capacity of their natural reducing constituents to form silver nanoparticles has not yet been studied. In this researc…
A broad range of nanomedicines is being developed to improve drug delivery for CNS disorders. The structure of the blood-brain barrier (BBB), the presence of efflux pumps and the expression of metabolic enzymes pose hurdles for drug-brain entry. Nanoformulations can circumvent the BBB to improve CNS-directed drug deli…
A simple method of synthesizing K2GeF6:Mn4+ red phosphor has been demonstrated by wet chemical etching of Ge shots in HF/KMnO4 mixed solution. The x-ray diffraction pattern suggests that the synthesized phosphor has the trigonal structure (space group=D3d3–P3¯m1). The optical properties of K2GeF6:Mn4+ are investigated…
As shape memory alloys (SMAs) gain popularity as high energy density actuators, one characteristic that becomes particularly important is the thermomechanical transformation fatigue life, in addition to maximum transformation strain and stability of actuation cycles. In this paper, a novel test frame design and testin…
Cellulose is one of the most abundant component of biomass in nature and the basic feedstock in paper and pulp industries. Cellulose fibres are relatively strong; have breaking strengths of up to 1 GN/m2 (10,000 MPa). Traditionally extracted from plant tissue (trees, cotton, etc.) cellulose can also be produced, using…
Dysprosium doped ZnO–B2O3–P2O5 (ZBP) glasses were prepared by a conventional melt quenching technique in order to study the luminescent properties and their utility for white light emitting diodes (LEDs). X-ray diffraction spectra revealed the amorphous nature of the glass sample. The present glasses were characterize…
A microscopic approach is presented for calculating general properties of interacting Brownian particles under steady shearing. We start from exact expressions for shear-dependent steady-state averages, such as correlation and structure functions, in the form of generalized Green-Kubo relations. To these we apply appr…
β-Al 2 x Ga 2-2 x O 3 alloy thin films were successfully grown on (100)-oriented β-Ga 2 O 3 single-crystal substrates by plasma-assisted molecular beam epitaxy. The films were grown almost coherently and maintained the β-phase up to an Al content of x =0.61. Below an Al content of about x =0.4, step-flow growth was ac…
Wound healing is a dynamic interactive process that involves a sequence of molecular and cellular events. Recent advances in cellular and molecular biology have greatly expanded our understanding of the biological process involved in wound repair and tissue regeneration. From plasma extravasation, with coagulation and…
The adsorption/desorption of NO x on commercial Ce x Zr 1− x O 2 solid solutions ( x = 1, 0.85, 0.69, 0.5, 0.21, 0.1, and 0) is reported in this paper. In the first part, the characterization of the ceria-zirconia is carried out by N 2 adsorption at 77 K, TEM, Raman, XRD, and DRIFTS in order to establish relationships…
Carbon-supported palladium, gold, and bimetallic Pd−Au nanocatalysts with different compositions were synthesized by a “water-in-oil” microemulsion method. Their catalytic activity toward borohydride electrooxidation was evaluated in alkaline medium. Physical and electrochemical methods where applied to characterize t…
Polyimide (PI) and PI nanocomposite fibers containing different amounts of multiwalled carbon nanotubes (MWNTs) were produced for the first time by electrospinning. The membranes prepared were composed of highly aligned nanofibers and showed significant enhancement in mechanical properties, compared with the membranes…
Gold nanoparticles (AuNPs) exhibit a unique phenomenon, known as surface plasmon resonance, which is responsible for their large absorption and scattering cross-sections, which are four to five orders of magnitude larger than those of conventional dyes. In addition, their optical properties can be controlled by varyin…
The design progress in a compact low aspect ratio (low A ) DEMO reactor, ‘SlimCS’, and its design issues are reported. The design study focused mainly on the torus configuration including the blanket, divertor, materials and maintenance scheme. For continuity with the Japanese ITER-TBM, the blanket is based on a water…
Cutting graphene by a catalytic hydrogenation process can generate graphene pieces with smooth edges of atomic precision and well-defined shapes. Controlled cutting of graphene by creating graphene step edges by oxidation or plasma etching is demonstrated. A combination of cutting, transfer, and lithography is shown t…
Abstract Recent developments in nanotechnology have led to a method for producing free‐standing polymer nanosheets as a macromolecular organization. Compared with bulk films, the large aspect ratio of such nanosheets leads to unique physical properties, such as transparency, noncovalent adhesion, and high flexibility.…
Local structure of ReOFeAs (Re=La, Pr, Nd, Sm) system has been studied as a function of chemical pressure varied due to different rare-earth size. Fe K -edge extended X-ray absorption fine structure (EXAFS) measurements in the fluorescence mode has permitted to compare systematically the inter-atomic distances and the…
Using an approximate time-dependent density functional theory method, we calculate the absorption and luminescence spectra for hydrogen passivated silicon nanoscale structures with large aspect ratio. The effect of electron confinement in axial and radial directions is systematically investigated. Excited state relaxa…