Materials Literature
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Ceria−praseodymia (CP) nanocrystalline solid solutions were prepared by a coprecipitation method and calcined at various temperatures to understand the thermal effects on the physicochemical properties of the nano-oxides. The structural and redox properties of the synthesized samples were investigated by means of X-ra…
Narrow polydisersity cyclic poly(caprolactone) was synthesized by cyclization of linear α,ω-functionalized poly(caprolactone). The linear precursors were prepared via ring-opening polymerization from an azido-functionalized initiator, followed by end group modification to attach a terminal alkyne. Click coupling affor…
In this work we calculate the local elastic moduli in a weakly polydispersed two-dimensional Lennard-Jones glass undergoing a quasistatic shear deformation at zero temperature. The numerical method uses coarse-grained microscopic expressions for the strain, displacement, and stress fields. This method allows us to cal…
Following a recent theoretical suggestion and microwave experiments, we fabricate photonic metamaterials composed of pairs of twisted gold crosses using two successive electron-beam-lithography steps and intermediate planarization via a spin-on dielectric. The resulting two effective resonances of the coupled system l…
We report a correlation between the microstructure of the anode electrode of a solid oxide fuel cell (SOFC) and its electrochemical performance for a tubular design. It was shown that the electrochemical performance of the cell was extensively improved when the size of constituent particles was reduced so as to yield…
ADVERTISEMENT RETURN TO ISSUECommunication to the...Communication to the EditorNEXTPolymeric Modification of Graphene through Esterification of Graphite Oxide and Poly(vinyl alcohol)Horacio J. Salavagione*, Marián A. Gómez, and Gerardo MartínezView Author Information Instituto de Ciencia y Tecnología de Polímeros, CSI…
Small-angle X-ray scattering (SAXS) is used to demonstrate the presence of density fluctuations in ambient water on a physical length-scale of approximately 1 nm; this is retained with decreasing temperature while the magnitude is enhanced. In contrast, the magnitude of fluctuations in a normal liquid, such as CCl(4),…
Helium irradiation on tungsten changes the surface morphology dramatically by forming a nanometre-sized fibreform structure which could bring about serious problems for fusion reactors. From the experimental results in liner divertor simulators, it is revealed that the incident ion energy and surface temperature are k…
Developments in water gas shift (WGS) catalysis, especially during the last decade, are reviewed. Recent developments include the development of 1 Mond, L. and Langer, C. 1888. British Patent, 12608 [Google Scholar] chromium‐free catalysts that can operate at lower steam to gas ratios and 2 Bosch, C. and Wild, W. 1914…
A broad overview of the polymer chemistry based on carbon-carbon triple bonds and the structures and properties of the acetylenic polymers, was investigated. Acetylenic molecules have been developed into a group of versatile monomers with multifaceted reactivities and rich polymerization behaviors. They have emerged a…
Nanodispersion of single-walled carbon nanotubes (SWCNTs) has been systematically investigated with the use of sodium dodecyl sulfate (SDS) and poly(vinylpyrrolidone) (PVP) surfactant in de-ionized water. A high concentration of nanodispersed SWCNTs up to 0.08 mg/mL was achieved with introduction of an additional disp…
In 1972, de Gennes pointed out the formal analogy between the Landau–Ginzburg Hamiltonians describing the phase transition from normal to superconductor on one hand and from nematic to smectic A liquid crystals on the other hand. This elegant analogy became a source of inspiration not only for theoreticians, as it rev…
Abstract Silicone‐based cholesteric liquid crystalline polymers (ChLCP) were fabricated with variable clearing temperatures as controlled by their chemical compositions. The chemical structures of the mesogenic monomers and ChLCP were confirmed by FTIR and 1 H‐NMR spectroscopy. The mesogenic properties and phase behav…
Carbon dioxide (CO 2 ) is becoming a promising alternative to perchloroethylene in dry cleaning. In this work, the effect of CO 2 dry cleaning on some physical and mechanical properties of six different pure wool and wool/cashmere fabrics was investigated in order to detect any possible fabric modification. It was fou…
Bahan komposit karet alam-silika (karet alam-SiO2) dikembangkan dengan kombinasi partikel silika dan lateks alam iradiasi (LAI). Hasil penelitian menunjukkan bahwa partikel SiO2 secara homogen didistribusikan keseluruh permukaan matriks karet alam sebagai clusters. Partikelpartikel dibentuk sebagai suatu clusters deng…
Abstract A low‐loss flexible magnetic composite with Ni 0.8 Zn 0.2 Fe 2 O 4 (NZO) ultrafine particles embedded in a thermoplastic polyolefin elastomer matrix was fabricated with extrusion technology. The electromagnetic and mechanical properties of the as‐prepared composites were investigated in detail. The results in…
Gas phase electronic transitions for the C 2B2<--X 2A1 and D 2B1<--X 2A1 band systems of T-shaped AlC2 (C2v) radical have been measured in the 345-475 nm range. Vibrational analyses of both band systems are reported. Simulation of several rotationally resolved bands confirms previously obtained rotational parameters f…
Abstract Polymers generally have a chemically inert surface, are nonporous, and have low surface energy, which is characterized by their relatively weak adhesion to other materials. Numerous methods have been developed to modify polymer surfaces chemically. This study was an investigation of how the surface energy of…
We report hysteretic photophysical behavior over a 110 K temperature range in freshly prepared colloidal suspensions of PbS/oleic acid nanocrystals. A bistable regime consisting of both low and high absorbance states of the PbS nanocrystals is observed between 215 and 240 K. The change in absorbance is significant (in…
Phosphorous-containing flame-retardant polyurethanes were prepared and characterized by various chemical and instrumental analysis techniques. Various physical and thermal properties of the polymers were established. Flame-retardant characteristics of polymers in the form of film were determined. Polymer films show go…