Materials Literature
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We present experimental results on the optical absorption spectra of epitaxial graphene from the visible to the terahertz frequency range. In the terahertz range, the absorption is dominated by intraband processes with a frequency dependence similar to the Drude model. In the near-IR range, the absorption is due to in…
It is likely that nanofabrication will underpin many technologies in the 21st century. Synthetic chemistry is a powerful approach to generate molecular structures that are capable of assembling into functional nanoscale architectures. There has been intense interest in self-assembling low-molecular-weight gelators, wh…
Steel corrosion and erosion-corrosion have an important role in oil fieldsutilizing steel pipelines. Therefore; in the present work corrosion, erosion anderosion-corrosion tests are studied individually to investigate the interactionbetween corrosion and erosion processes and to quantify the synergy (that causedby ero…
The blends of poly(butylene terephthalate) (PBT) with thermoplastic elastomer (TPE) at a blending composition of 10–30 wt.% TPE were prepared with an objective to enhance impact toughness of PBT. Two different grades of PBT were selected based on carboxyl end group and viscosity. Melting behavior, mechanical propertie…
A rapid, cost effective and easy to implement method for treating wool and wool blend textiles to superhydrophobic with controllable interference on other properties such as handle is demonstrated. The process is based on in situ chemical binding of inexpensive silica and polysiloxane hybrid material onto fibres. Supe…
Molecular dynamics simulations have been performed in order to study the effects of nanoscale filler cross-linking topologies and loading levels on the mechanical properties of a model elastomeric nanocomposite. The model system considered here is constructed from octafunctional polyhedral oligomeric silsesquioxane (P…
The negatively charged nitrogen-vacancy defect center, (NV)(-), in diamond has been investigated theoretically for its one- and two-photon absorption properties involving the first excited state with the (3)A(2)-->(3)E transition. Time-dependent density functional theory (TD-DFT), configuration interaction with single…
Highly Cu doped ZnO nanowires have been fabricated by vapor-liquid-solid (VLS) process. The average concentration of Cu in the ZnO nanowires is estimated to be 6 at. %. The ultrafine synthesized nanowires have diameters nearly 80 nm, while their average length lies in the range of 40 to 90 mum. Raman spectroscopy show…
We describe observations of a novel hysteresis behavior in the growth of ice crystals under near-vacuum conditions. Above a threshold supersaturation, we find that the ice growth rate often exhibits a sudden increase that we attribute to an impurity-driven growth instability. We examine possible mechanisms for this in…
We present the design of a general-purpose convection chamber that produces a stable environment for studying the growth of ice crystals from water vapor in the presence of a background gas. Crystals grow in free fall inside the chamber, where the temperature and supersaturation are well characterized and surprisingly…
ADVERTISEMENT RETURN TO ISSUEPREVCommentNEXTComment on “Formation and Thermal Stability of Au2O3 on Gold Nanoparticles: Size and Support Effects”J. Michael Gottfried†View Author Information Universität Erlangen-Nürnberg, Lehrstuhl für Physikalische Chemie II, Egerlandstrasse 3, 91058 Erlangen, Germany† Contact Informa…
Si-doped ZnO can be synthesized on the surface of the early grown Zn 2 SiO 4 nanostructures and form core/shell coaxial heterostructure nanobelts with an epitaxial orientation relationship. A parallel interface with a periodicity array of edge dislocations and an inclined interface without dislocations can be formed.…
Abstract The highly dispersed property of poly(vinylpyrrolidone) (PVP)-coated cerium oxide nanoparticles can be retained for a long time in polar solvents. In this 13C CP/MAS NMR study, it is revealed that the surface PVP forms cross-linked structures during the synthesis of the nanoparticles.
We theoretically show that the giant magneto-optical Kerr effects are induced by the electronic structure of half-metallic ferromagnetism in the perovskite BiNiO 3 with the orthorhombic structure by first-principles calculation. A Kerr rotation is up to 1.28° at 1.87 eV, which is comparative to the recognized maximum…
The grafted copolymer of natural rubber (NR) and maleic anhydride (MA) was synthesized in a solution state by using ultraviolet radiation. The NR-g-MA was characterized using infrared (IR) technique. The prepared NR-g-MA was added to a 50/50 blend of NR and acrylonitrile-butadiene copolymer (NBR) as a compatibilizer.…
Crystalline interfacial water layers have been observed at room temperature on both hydrophobic and hydrophilic surfaces − in air and subaquatically. Their implication in biology (and evolution) was postulated in a visionary paper in 1971 by Szent Györgyi. Today, they are believed to play a fundamental role in protein…
Commercial medium density fiberboard (MDF) was produced using rubberwood and oil palm empty fruit bunch (OPEFB) based on oven dried weight. Relative humidities of 65%, 93% with fixed temperature at 20°C, and normal condition was used for storage of the boards. The effects of storage time and relative humidity of MDF w…
The capacity degradation mechanism of the Ti−V-based hydrogen storage electrode alloys was systematically investigated from the viewpoint of intrinsic/extrinsic degradation for the first time. The oxidation/corrosion of the active components and the appearance of the irreversible hydrogen were found to be the two domi…
The influence of untreated and benzoylated oil palm empty fruit bunch (OPEFB) short fiber loading on the mechanical properties of the poly(vinyl chloride) (PVC) composite was studied. Benzoylated OPEFB was produced by mixing OPEFB with NaOH solution and agitating vigorously with benzoyl chloride. The PVC resin, variou…
Generation and assembly of gold nanostructures were investigated in the organized molecular films of a series of gemini amphiphiles. The chloroauric acid, dissolved in the aqueous subphase, was incorporated into the monolayers of the gemini amphiphiles containing ethyleneamine spacers through an interfacial assembly.…