Materials Literature
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A central challenge in polymer science today is creating materials that dynamically alter their structures and properties on demand, or in response to changes in their environment. Surfaces represent an attractive area of focus, since they exert disproportionately large effects on properties such as wettability, adhes…
The application of gold nanoshells (NS) as a surface-enhanced Raman (SER) platform for intracellular sensing in NIH-3T3 fibroblast cells was studied by using a near-infrared Raman system. To show the feasibility of using these 151 +/- 5 nm sized solution-stable nanoparticles inside living cells, we investigated the up…
High-valent manganese(IV or V)-oxo porphyrins are considered as reactive intermediates in the oxidation of organic substrates by manganese porphyrin catalysts. We have generated Mn(V)- and Mn(IV)-oxo porphyrins in basic aqueous solution and investigated their reactivities in C-H bond activation of hydrocarbons. We now…
Mesoporous chromia with ordered three-dimensional (3D) hexagonal polycrystalline structures were fabricated at 130, 180, 240, 280, and 350 degrees C in an autoclave through a novel solvent-free route using KIT-6 as the hard template. The as-obtained materials were characterized (by means of X-ray diffraction, transmis…
Using Raman spectroscopy, we measure the optical phonon energies of suspended graphene before, during, and after thermal cycling between 300 and 700 K. After cycling, we observe large upshifts ( approximately 25 cm(-1)) of the G band frequency in the graphene on the substrate region due to compression induced by the t…
Abstract Panels coated by hot dipping with zinc (HDG), Zn–5Al (Galfan) and Zn–1.5Al–1.5Mg coatings at different thicknesses were phosphated and painted on an industrial line. Crevice panels with non‐painted bare parts modelling conditions in hem flanges, reference panels with open surfaces and formed non‐painted panel…
Abstract Variable amounts of transition metal oxides (MO), such as MnO 2 , ZnO, Ni 2 O 3 , etc., were incorporated into blends of polypropylene (PP)/ammonium polyphosphate (APP)/dipentaerythritol (DPER) with the aim of studying and comparing their effects with main‐group MO on intumescent flame retardance (IFR). The P…
Rolf Landauer made important contributions to many branches of science. Within the broad area of transport in disordered media, he wrote seminal papers on electrical conduction in macroscopically inhomogeneous materials, as well as fundamental analyses of electron transport in quantum mechanical systems with disorder…
We study the effect of long range dipolar forces on the dynamics and morphology of domain walls in magnetic thin films by numerical simulations of the spin-1 random field Ising model. By studying the size distribution of avalanches of domain wall motion arising as a response to quasistatic external driving, we observe…
The structural phase transitions and the fundamental band gaps of ${\text{Mg}}_{x}{\text{Zn}}_{1\ensuremath{-}x}\text{O}$ alloys are investigated by detailed first-principles calculations in the entire range of Mg concentrations $x$, applying a multiple-scattering theoretical approach (Korringa-Kohn-Rostoker method).…
We investigated the vibrational properties of graphene nanoribbons by means of first-principles calculations on the basis of density-functional theory. We confirm that the phonon modes of graphene nanoribbons with armchair- and zigzag-type edges can be interpreted as fundamental oscillations and their overtones. These…
Recent optical conductivity experiments of doped graphene in the infrared regime reveal a strong background in the energy region between the intra and interband transitions difficult to explain within conventional pictures. We propose a phenomenological model taking into account the marginal Fermi liquid nature of the…
Abstract A hydrophilic poly(vinyl ether)‐backbone polymer bearing a pendant TEMPO radical, poly(2,2,6,6‐tetramethylpiperidinyloxy‐4‐yl vinyl ether) (PTVE), was designed as a cathode‐active material, which displays a reversible one‐electron redox capability, even in an aqueous electrolyte. The PTVE layer coated on a cu…
The structural, mechanical, and electronic properties of ${\text{MnB}}_{2}$, ${\text{TcB}}_{2}$, and ${\text{ReB}}_{2}$ have been studied by performing first-principles calculations at the level plane-wave basis pseudopotential formalism in both aluminum diboride- and rhenium diboride-type structures. The results of l…
In this paper, Pd/ZnO samples with various palladium contents were prepared through a facile one-pot hydrothermal method. The crystal structures, chemical compositions, and optical properties of the samples were characterized by X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), X-ray p…
The configurations, stability and electronic structures of a new class of boron sheet and related boron nanotubes are predicted within the framework of density functional theory. This boron sheet is sparser than those of recent proposals. Our theoretic results show that the stable boron sheet remains flat and is metal…
It is known that monolayer graphene has an extraordinarily high intrinsic mobility of the charge carriers. An important complication is the presence of strong mesoscopic resistance fluctuations (MRFs) that, in graphene, persist to relatively high temperatures. These reproducible fluctuations are seen as a function of…
We investigate the crystallization of amorphous arsenic-selenium alloys with 0%, 0.5%, 2%, 6%, 10%, and 19% arsenic by atomic concentration using synchrotron X-ray absorption spectroscopy. We identify crystalline order using the extended X-ray absorption fine structure (EXAFS) spectra and correlate this order to chang…
We present a theory of voltage-induced spin-transfer torques in ballistic non-collinear spin valves. The torkance on one ferromagnetic layer is expressed in terms of scattering coefficients of the whole spin valve, in analogy to the Landauer conductance formula. The theory is applied to Co/Cu/Ni(001)-based systems whe…
A natural polyol was prepared from castor oil by alcoholysis with triethanolamine. The oil and the oil-based polyol were characterized by infrared spectroscopy and through the analytical determination of their functional groups, both techniques indicating that the hydroxyl content increased significantly after the alc…