Materials Literature
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We analyze the hydrogenation of the Si-terminated surfaces $3\text{C-SiC}(100)\text{\ensuremath{-}}3\ifmmode\times\else\texttimes\fi{}2$ and $3\text{C-SiC}(100)\text{\ensuremath{-}}c(4\ifmmode\times\else\texttimes\fi{}2)$ using density-functional-theory techniques. For the Si-rich $3\ifmmode\times\else\texttimes\fi{}2…
We report predictions for the energy eigenstates and inelastic neutron-scattering excitations of an isotropic Heisenberg hexamer consisting of general spin $S$ and ${S}^{\ensuremath{'}}$ trimers. Specializing to spin-1/2 ions, we give analytic results for the energy excitations, magnetic susceptibility, and inelastic…
It is shown through experimental mapping of surface-enhanced Raman scattering (SERS) from dielectric core nanowires exposed to benzene thiol that any dielectric substrate plays a critical role in the SERS enhancement. Theoretical calculations of the plasmonic enhancement using finite element methods confirms the role…
The design of new anode materials to promote the reforming of methanol is important for the development of intermediate temperature direct methanol solid oxide fuel cells. A previous study showed Pd/CeO 2 −Sm 2 O 3 to be a good candidate. Here, the influence of the calcination pretreatment of the support and the reduc…
Diglycidyl ether of bisphenol A nanocomposites with unmodified multi-walled carbon nanotubes (u-MWCNTs) and silanized multi-walled carbon nanotubes (si-MWCNTs) were prepared by cast molding method. The effects of 3-aminopropyltriethoxysilane functionalization of MWCNTs on the thermal and mechanical properties of the n…
Abstract An aerobic oxidative removal of mercaptans from gasoline in the absence of liquid base has been demonstrated for gasoline sweetening over CuZnAl catalyst. This process could proceed at large WHSV of gasoline (50–70 h −1 ) with >95% mercaptan conversion at 150°C (or 300°C) using an O 2 /S molar ratio of 20–…
A detailed elastic neutron scattering study of the structural and magnetic phase transitions in single-crystal ${\text{SrFe}}_{2}{\text{As}}_{2}$ reveals that the orthorhombic (O)-tetragonal (T) and the antiferromagnetic transitions coincide at ${T}_{\text{O}}={T}_{\text{N}}=(201.5\ifmmode\pm\else\textpm\fi{}0.25)\tex…
Flax fibers possess high specific strength and stiffness, and thus are competitive in terms of mechanical properties with traditional reinforcing fibers used in polymer-matrix composite materials. For environmental and economical benefit, it would be preferable to apply nontextile grade fibers in composites provided t…
The competition between quantum fluctuations and the antiferroelectric state in Sr(0.8)Ca(0.2)Ti(1-x)Ru(x)O(3) is investigated by measuring the low-temperature dielectric permittivity and by Raman spectroscopy. We demonstrate the significant impact of quantum fluctuations on the stability of the antiferroelectric pola…
Abstract Poly(amino‐amide) particles were prepared by reacting 4,4′‐diphenyldicarbonyl chloride and 3,3′‐diaminobenzidine using a precipitation polymerization method with ultrasonic irradiation. The resulting particles had a narrow size distribution with an average diameter of 334 nm and showed excellent dispersion st…
The preparation and morphological characterization of a so-called composite membrane based on a 3-miktoarm star terpolymer on a support layer is reported. It is demonstrated that different levels of order and different morphological orientations can be obtained by directly casting the star terpolymer solution on the s…
Nature displays several solutions to underwater adhesion. In the bivalve mussels, an adhesive attachment organ known as the byssus is often used. In the blue mussel and related species the byssal system consists of a series of byssus threads that are organic in nature. In contrast hereto, the jingle shell, Anomia sp.,…
Listeria monocytogenes is widely distributed in nature and the infection listeriosis is recognized as a potential threat for human health because of its mortality rate. The objective of this study was to evaluate the growth profile and chitosan production by Mucor rouxxi UCP 064 grown in yam bean (Pachyrhizus erosus L…
Poly(p-phenylenevinylene) (PPV) derivatives have long been studied because of their attractive opto- and electroluminescent properties and have potential applications for devices such as light-emitting diodes and photovoltaics. The ability to induce alignment of these PPV derivatives may lead to the enhancement of cha…
We investigate the effects of an external electric and magnetic field on the first hyperpolarizability tensor of a quantum system, such as a molecule or nanoparticle, whose nonlinear response is well below the fundamental limit. We find that the intrinsic hyperpolarizability is optimized when the applied electric and…
A series of Pr 0.55 Ca 0.45 MnO 3 compounds with average particle size ranging from 2000 to 30 nm have been synthesized by the sol−gel method and their charge ordering (CO) and magnetic properties are investigated. It is observed that with particle size decreasing, the CO transition is gradually suppressed and finally…
Stepwise-graded composite layer of M2 tool steel and 17-4PH stainless steel was fabricated by a simple powder layering technique and the isothermal and nonisothermal sintering response of the bilayer were examined. It was shown that the materials exhibit poor compatibility during co-sintering, i.e., the amount of mism…
Abstract The effect of different nebulized liquids directly introduced into the dielectric barrier discharge (DBD) was compared with simple air DBD treatment of polyethylene foils. Water, alcohols and aqueous solutions of different organic substances (environmentally compatible) and water soluble polymers were applied…
Shearing single-walled carbon nanotubes (SWNTs) coated with sodium dodecyl sulfate in microfluidic channels significantly increases the photoluminescence (PL) intensity and dispersion stability of SWNTs. The PL quantum yield (QY) of SWNTs improves by a factor of 3 for initially bright suspensions; on the other hand, S…
The present paper details the synthesis, characterization, and preliminary physical analyses of a series of polyisobutylene derivatives featuring urethane and urea end-groups that enable supramolecular network formation to occur via hydrogen bonding. These polymers are readily accessible from relatively inexpensive an…