Materials Literature
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OBJECTIVE: To formulate a simple rapid procedure for bioreduction of silver nanoparticles using aqueous leaves extract of Moringa oleifera (M. oleifera). METHODS: 10 mL of leaf extract was mixed to 90 mL of 1 mM aqueous of AgNO3 and was heated at 60 - 80 °C for 20 min. A change from brown to reddish color was observed…
Nanorattles consisting of hydrophilic, rare-earth-doped NaYF(4) shells each containing a loose magnetic nanoparticle were fabricated through an ion-exchange process. The inner magnetic Fe(3)O(4) nanoparticles are coated with a SiO(2) layer to avoid iron leaching in acidic biological environments. This multifunctional…
The inaccessibility of uniform-diameter, single-chirality carbon nanotubes (CNTs) in pure form continues to thwart efforts by scientists to use these ultrathin materials in innovative applications that could revolutionize nanoscale electronics. Stimulated by the challenge to address this long-standing problem, we and…
Graphene has attracted much attention from researchers due to its interesting mechanical, electrochemical, and electronic properties. It has many potential applications such as polymer filler, sensor, energy conversion, and energy storage devices. Graphene-based nanocomposites are under an intense spotlight amongst re…
In recent years, nanoparticles (NPs) have increasingly found practical applications in technology, research and medicine. The small particle size coupled to their unique chemical and physical properties is thought to underlie their exploitable biomedical activities. Here, we review current toxicity studies of NPs with…
Research on liposome formulations has progressed from that on conventional vesicles to new generation liposomes, such as cationic liposomes, temperature sensitive liposomes, and virosomes, by modulating the formulation techniques and lipid composition. Many research papers focus on the correlation of blood circulation…
Using bottom-up chemistry techniques, the composition, size, and shape in particular can now be controlled uniformly for each and every nanocrystal (NC). Research into shape-controlled NCs have shown that the catalytic properties of a material are sensitive not only to the size but also to the shape of the NCs as a co…
Gold nanoparticles (GNPs) with controlled geometrical, optical, and surface chemical properties are the subject of intensive studies and applications in biology and medicine. To date, the ever increasing diversity of published examples has included genomics and biosensorics, immunoassays and clinical chemistry, photot…
Thermal shock behavior of porous ceramic nozzles with various pore sizes for continuous casting process of steel was investigated in terms of physical properties and microstucture. Porous nozzle samples with a composition of Al 2 O
This article describes the formation of homogeneous nanosize (50–250 nm thick) Y<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup> coatings on glass surfaces, using water and water–alcohol solutions of yttrium and europium nitrates. The characteristic bands of macroscopic Y<sub>2</s…
The authors developed a method based on the concept of heterogeneous condensation on charged centres (ions), for the preparation of nanoparticles that allows the control synthesis of particles with sizes from 10 to 100 nm. The technique is used to fabricate thin films of silver nanoparticles. According to the scanning…
Fluorescence recovery protein (FRP), which is encoded by the slr1964 gene in Synechocystis PCC 6803, plays a key role in the orange carotenoid protein-related photoprotective mechanism in cyanobacteria. As the crystal structure of FRP may provide information about the biological functions and mechanism of action of th…
The CuO-CeO 2 /Al 2 O 3 catalysts for the selective oxidation of CO in hydrogen-containing mixtures were prepared by surface self-propagating thermal synthesis (SSTS) with the use of cerium nitrate Ce(NO 3 ) 3 , the ammonia complex of copper acetate [Cu(NH 3 ) 4 ](CH 3 COO) 2 , and citric acid C 6 H 8 O 7 as a fuel ad…
Methods and results of research on the focusing properties of planar boundaries of some metamaterials modeled by a negative electromagnetic medium (i.e., one with both a negative permittivity and a negative permeability) are presented. The properties of flat focusing lenses made of isotropic, anisotropic, or chiral ne…
Pipeline steels absorb different amounts of hydrogen during transportation of sour oil and gas. Since hydrogen-related damages such as hydrogen-induced cracking are strongly affected by hydrogen permeation behavior of steels, the purpose of this study determined to investigate hydrogen permeation behavior in API X-70…
Cyclisch und flexibel: Ein einfaches molekulares Design wird vorgeschlagen, mit dem sich die Molekülpackung und Festkörpereigenschaften π-konjugierter Gerüste kontrollieren lassen. Feine Unterschiede in der Länge der flexiblen Alkylenbrücke cyclischer Terthiophendimere führen zu charakteristischen Molekülpackungen mit…
For different areas of combinatorial materials science, it is desirable to have multiple materials libraries: especially for irreversible high-throughput studies, like, for example, corrosion resistance testing in different media or annealing of complete materials libraries at different temperatures. Therefore a new c…
We examine nonequilibrium features of collapse behavior in model polymers with competing crystallization and glass transitions using extensive molecular dynamics simulations. By comparing to “colloidal” systems with no covalent bonds but the same non-bonded interactions, we find three principal results: (i) Tangent-sp…
In this study, single-crystalline γ-Al2O3 nanowires were synthesized by simple evaporation of Al–Si alloy source powder at 1070 °C under different working pressures. The structures and growth mechanisms of the nanowires were examined. Under a low working pressure of 0.5 torr, uniform nanowires with a catalyst particle…
Während des anaeroben Wachstums des Bakterienstamms HxN1 entstehen nahezu gleiche Mengen an (2R,1′R)- und (2S,1′R)-(1-Methylpentyl)succinat, die durch radikalische Addition des Kohlenwasserstoffs an Fumarat gebildet werden (siehe Schema). Der hochselektive Angriff auf das proS-Wasserstoffatom an C2 des n-Hexans geht m…