Materials Literature
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The reduction of carbon dioxide emission from flue gases can be achieved using post‐combustion technologies, such as adsorption employing efficient solid sorbents. In this work, the adsorption of CO2 on hydrotalcite‐like Al‐Mg compounds partially carbonated was studied using dynamic and static methods. The breakthroug…
Abstract Starch nanocrystals obtained from acid hydrolysis of waxy maize starch granules consist in crystalline nanoplatelets about 6–8 nm thick with a length of 20–40 nm and a width of 15–30 nm. New nanocomposite materials, i.e. natural rubber (NR) filled with waxy maize starch nanocrystals were processed by casting.…
Consecutive images of the fragmentation of capillary waves in an ultrasonic field were obtained using a high-speed video camera through a microscope at a frame rate of 500000 frames per second. The images showed that micro bubbles of uniform diameter from 4 to 15 $\,\mu$ m were generated at a constant periodic rate wh…
The scope of the article is to provide the state of the art concerning the utilization of Layered Double Hydroxide (LDH) materials in polymer nanocomposite and to enlight their potential application and even advantage in comparison to smectite-type materials. A particular attention is paid on the synthetic procedures…
Major issues involved in the classifi cation of the amphiboles are examined: (1) the role of (OH), Li and Fe3+, (2) the formal defi nition of a root name, (3) irreducible charge-arrangements and distinct species, (4) the use of prefi xes, (5) the principal chemical variables used in a classifi cation procedure, and (6…
A method is proposed for determining the water concentration in silicate melt inclusions (Mi) by confocal micro-Raman spectroscopy, without exposing the inclusions for measurement (a prerequisite of all previous methods). The latter is important for extremely water-rich Mi (e.g., those in evolved granites and pegmatit…
A vibration analysis of single- and double-walled carbon nanotubes as well as nanotubes embedded in an elastic matrix is presented using wave propagation approach. Approximate Flügge shell equations are proposed as the governing equations of vibration for the carbon nanotubes studied here. The double-walled nanotubes…
Abstract Under closed geochemical conditions, the weathering of a serpentinite rock composed of serpentine (70–85%) and magnesian chlorite (10–15%) associated with magnetite and chromite leads to the complete replacement of serpentine and chlorite by 2:1 layer silicates and produces new Fe oxides. The serpentine miner…
High-temperature (867-1534 ºC) density measurements were performed in air on 10 liquids in the Na 2 O-Fe 2 O 3 -FeO-SiO 2 (NFS) system and 5 liquids in the K 2 O-Fe 2 O 3 -FeO-SiO 2 (KFS) system using Pt double-bob Archimedean method. Replicate measurements indicate an average reproducibility of 0.22%. Compositions (i…
We report here on the preservation of ferroelectricity down to 2 nm in BiFeO 3 ultrathin films. The electric polarization can be switched reversibly and is stable over several days. Our findings bring insight on the fundamental problem of ferroelectricity at low thickness and confirm the potential of BiFeO 3 as a lead…
Uniform and stable core-shell microspheres composed of a poly(methyl methacrylate) (PMMA) core and a thin metallic shell of nickel-phosphorus, cobalt-phosphorus, or mixed metal alloys (CoNiP, NiFeP, CoFeP) were prepared by dispersion polymerization of methyl methacrylate followed by electroless plating. The presence o…
This study investigates the deposition by ionic self-assembly of alternating silica nanoparticle and poly(allyamine hydrochloride) layers with the goal to create a single-material antireflection coating. The condition that the optical thickness of the film be equal to λ∕4 can be satisfied by depositing the requisite n…
Lactic acid production was investigated for batch and repeated batch cultures of Enterococcus faecalis RKY1, using wood hydrolyzate and corn steep liquor. When wood hydrolyzate (equivalent to 50 g l(-1) glucose) supplemented with 15-60 g l(-1) corn steep liquor was used as a raw material for fermentation, up to 48.6 g…
Long-term performance of polymer housed surge arresters under multistress accelerated conditions simulating coastal Florida service environment in the lab has been presented. Commercial 9 kV ethylene propylene silicone blend (EPSB) and silicone rubber (SiR) arresters were procured and used for this purpose. Multi-stre…
For the development of lead-bismuth (Pb-Bi) cooled fast breeder reactors, the corrosion characteristics of various steels in a flowing Pb-Bi were investigated by means of steel corrosion test performed in the flowing Pb-Bi for 1,000 h. It was found that liquid metal corrosion was inhibited by single or multiple oxide…
Abstract The Generation IV International Forum has selected six promising nuclear power systems for further collaborative investigations and development. Among these six concepts, two candidates are Gas Cooled Reactors (GCR), namely the Very High Temperature Reactor (VHTR) and the Gas‐cooled Fast Reactor (GFR). The CE…
The dispersion properties of the guided modes propagating along a dielectric slab waveguide with a left-handed material substrate are studied. It is shown that both the oscillating and surface modes can propagate very slowly along such a waveguide if the thickness of the core layer is chosen appropriately. The propaga…
The influence of the pretreatment of carbon nanotubes (CNTs) on the deposition of Pt‐n noparticles is investigated. The results show that refluxing CNTs by the mixture solution of sulfuric and nitric acids, or immersing them in the H 2 O 2 solution are effective ways for depositing Pt‐nanoparticles on the CNTs. The hy…
This paper describes mechanical properties of submicron thick diamond-like carbon (DLC) films used for surface modification in MEMS devices. A new compact tensile tester operating under an atomic force microscope (AFM) is developed to measure Young's modulus, Poisson's ratio and fracture strength of single crystal sil…
Abstract In this work urea‐formaldehyde microcapsules containing an epoxy resin are prepared by in situ polymerization of monomers in an oil‐in‐water emulsion. Scanning electronic microscopy (SEM) was performed to investigate on microcapsule size and surface morphology. Calorimetric and spectroscopic analyses were car…