Materials Literature
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The adsorption of atomic hydrogen on graphene monolayer is considered using the model density of states (M model). Analytical expressions for the density of states of H adatom and its occupation number n a are obtained. The main (local) contribution n l to the total occupation number n a is due to a local level of the…
In this work, the influence of Reynolds number (Re) on the galvanic corrosion of the copper/AISI 304 stainless steel pair in an 850 g/L lithium bromide solution was evaluated in a hydraulic circuit using a zero-resistance ammeter; this technique has the advantages that it can be used without disturbing the system unde…
In this paper, we present a graphical computer-aided design (CAD) environment for the design, analysis, and layout of carbon nanotube (CNT) field-effect transistor (CNFET) circuits. This work is motivated by the fact that such a tool currently does not exist in the public domain for researchers. Our tool has been inte…
The interfacial chemistry of the impregnation step involved in the preparation of nickel catalysts supported on titania is presented. Several methodologies based on deposition data, pH measurements, potentiometric mass titrations, and microelectrophoresis have been used in conjunction with diffuse reflectance UV/Vis/N…
Measurements of specific heat, resistivity, and magnetic hysteresis loop were performed on high-quality Fe 1.04 Te 0.60 Se 0.40 single crystal. The exponential decay of the specific heat of the sample can be well described by the BCS-weak coupling theory. The resistive upper critical fields H c 2 were extracted with t…
Abstract Aim of the present study was to establish methods for the evaluation of biocompatibility and degradation behaviour of coated magnesium sponges in cancellous bone. So bioglass coated sponges of the magnesium alloy AX30 were implanted into the femurs of rabbits for an observation period of 6, 12 and 24 weeks, r…
Ammineite, CuCl 2 (NH 3 ) 2 , the first mineral containing an ammine complex, was discovered at Calleta Pabellon de Pica, Tarapaca region, Chile. The mineral is named for the first described ammine complex as naturally occurring crystals. Ammineite occurs as hypidiomorphic mm-sized blue crystals and also as powdery ma…
We have experimentally demonstrated block copolymer lithography in conjunction with optical lithography features on dimensional scales close to the natural pitch of the self-assembling block copolymer. Within this context, the inherent self-assembled shape, size and arrangement will self-adjust to accommodate the exte…
Larvae of many holometabolous insects possess abdominal appendages called prolegs. Lepidoptera larvae have prolegs in the segments A3-A6. Functions of Lepidoptera hox genes on these abdominal appendages development is still a controversial issue. In this article, we report the use of double strand RNA (dsRNA)-mediated…
This paper describes a new approach to the realization of reconfigurable CMOS-compatible RF inductors using programmable vias made from phase-change (PC) materials. Reversible reconfiguration of a custom-fabricated inductor prototype is demonstrated using voltage pulses to transform (by Joule heating) the PC switch be…
The pseudogap state is one of the peculiarities of the cuprate high-temperature superconductors. Here we investigate its presence in BaCo x Fe 2− x As 2 , a member of the pnictide family, with temperature-dependent scanning tunneling spectroscopy. We observe that for under, optimally and overdoped systems the gap in t…
CO is a useful probe in the characterization of surface properties of both metal and metal oxide via adsorption. Adsorption of CO was used to monitor the possible active site of an Au/TiO 2 catalyst for the CO oxidation reaction. CO adsorption on the reduced catalyst results in the band at 2104 cm −1 indicative of Au…
Abstract The incorporation of boron (B) and nitrogen (N) into illite is the key demand-side process responsible for the diagenetic budget of these elements in sedimentary basins, with important implications for pore-water chemistry, natural-gas composition, and borehole geophysics. The purpose of the present study was…
Abstract The effect of nanoclay on the fatigue crack growth behavior was investigated. Fatigue tests were carried out on edge notched specimens under cyclic tension loadings. A power–law dependency between crack growth rate and tearing energy was obtained. Natural rubber (NR) filled with 5 phr organically modified mon…
In order to explore the reason why the hexagonal phase of FeSe is insulating, in contrast with tetragonal FeSe which is superconducting, we study a model that incorporates all orbitals of the Iron d -shell. It is found, within the local-density approximation plus dynamical mean-field theory (LDA+DMFT) that hexagonal F…
Research on fire retardant–treated wood and wood-based composites has been conducted in China for over two decades. Although many kinds of fire retardants for wood and wood-based composites have been studied, the focus is still mainly on compounds or mixtures containing phosphorus, nitrogen, and boron, which can be us…
Abstract This paper presents an overview of syntheses and applications of magnetic nanoparticles (MNPs) at the Institute of Materials Science, Vietnam Academy of Science and Technology. Three families of oxide MNPs, magnetite, manganite and spinel ferrite materials, were prepared in various ways: coprecipitation, sol–…
We report on the electro-optic and dielectric properties of optical switching devices based on poly(3,4-ethylene dioxythiophene):polystyrene sulfonate (PEDOT:PSS) electrodes sandwiching a polymer-dispersed liquid crystal (PDLC) layer. We demonstrate that the frequency dependence of the driving electric field on the op…
Cu-doped ZnO (ZnO:Cu) thin films were grown on Si (111) substrate by low-pressure metal-organic chemical vapor deposition equipment. The crystal structures and optical properties of as-grown sample were examined. X-ray diffraction patterns indicated a lattice relaxation after the Cu doping. The incorporation of Cu ato…
Yb 3+ :Er 3+ co-doped oxy-fluoride ceramics glass has been prepared. The mechanism of up-conversion emissions about Er 3+ was discussed, and the temperature properties of green up-conversion fluorescence between 303 and 823 K were investigated. The results show that the sensitivity of this sample reaches its maximum v…