Materials Literature
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This study evaluates the loading rate and surface condition dependence of the flexural strength of a borosilicate glass. The glass specimens are subjected to three different surface treatments before four‐point bending tests to study the effect of surface flaws. Quasistatic (Material Test System 810) and dynamic (Kols…
Abstract Multiwall carbon nanotube reinforced poly (phenylene sulfide) (PPS) nanocomposites were successfully fabricated through melt compounding. Structural, electrical, thermal, rheological, and mechanical properties of the nanocomposites were systematically studied as a function of carbon nanotube (CNT) fraction. E…
Abstract Größer heißt nicht besser : Gold‐Nanocluster zeigten eine erhöhte elektrokatalytische Aktivität in der Sauerstoffreduktion, wenn der Partikelkern von Au 140 auf Au 11 verkleinert wurde (siehe Auftragung des Onset‐Potentials E onset und der Spitzenstromdichte J K ). Der zunehmende Anteil an Oberflächenatomen u…
Abstract Silicone rubber foam was prepared through crosslinking with electron beam irradiation and foaming by the decomposing of blowing agent azobisformamide (AC) in hot air. The crosslinking and foaming of silicone rubber was carried out separately, which was different from the conventional method of chemical crossl…
We propose graphite intercalation compounds (GICs) as a material system with precisely the same electronic properties as doped few layer graphene. Despite the fact that GICs have been around for the last four decades, this fact has gone unnoticed so far. Especially, we focus on the electronic energy bands of ${\text{K…
Indium bis(phenolato) complexes [In(L)R(THF)(n)] (L = 1,4-dithiabutanediylbis(4,6-di-tert-butylphenolato) (etbbp), R = Cl, n = 0, 1; L = 1,3-dithiapropanediylbis(6-tert-butyl-4-methylphenolato) (mtbmp), R = Me, n = 1, 2; L = 1,4-dithiabutanediyl-bis(6-tert-butyl-4-methyl-phenolato) (etbmp), R = Me, n = 0, 3; L = etbbp…
Quantum dots (QDs) have discrete quantum states isolated from the environment, making QDs well suited for quantum information processing. In semiconductor QDs, the electron spins can be coherently oriented by photoexcitation using circularly polarized light, creating optical orientation. The optically induced spin ori…
Hydrogen molecules in ZnO are identified by their local vibrational modes. In a Raman study, interstitial ${\mathrm{H}}_{2}$, HD, and ${\mathrm{D}}_{2}$ species were found to exhibit local vibrational modes at frequencies 4145, 3628, and $2985\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$, respectively. After therma…
Carbon monoxide adsorption equilibria and kinetics on zeolite 5A, 13X, MOF-5, and MOF-177 were measured volumetrically at (298, 237, and 194.5) K and carbon monoxide pressures up to 108 kPa. It was found that zeolite 5A had the highest adsorption capacity at ambient temperature (298 K) and ambient pressure (108 kPa),…
By controlling the heating rate at <10°C/min during spark‐plasma‐sintering (SPS) processing, transparent polycrystalline spinel with an in‐line transmission of 50% and 70% in the visible‐ and infrared‐wavelengths, respectively, can be successfully fabricated for only a 20‐min soak at 1300°C. The high transmission c…
Superparamagnetic iron oxide nanoparticles (SPION) are being increasingly used in various biomedical applications such as hyperthermia, cell and protein separation, enhancing resolution of magnetic resonance imaging, and drug delivery. However, the toxicity data for SPION are limited. In this study, uncoated and singl…
Very long range surface-enhanced Raman scattering is observed from a nickel nanowire that is separated by 120 nm from a pair of gold nanodisks. The excitation of the surface-plasmon resonance (SPR) from the gold nanodisk pair generates an enhanced electromagnetic field near the nickel segment (SEM, left), leading to R…
Nanopores spanning synthetic membranes have been used as key components in proof-of-principle nanofluidic applications, particularly those involving manipulation of biomolecules or sequencing of DNA. The only practical way of manipulating charged macromolecules near nanopores is through a voltage difference applied ac…
We have measured the terahertz response of oriented germanium nanowires using ultrafast optical-pump terahertz-probe spectroscopy. We present results on the time, frequency, and polarization dependence of the terahertz response. Our results indicate intraband energy relaxation times of photoexcited carriers in the 1.5…
A simple and completely general representation of the exact exchange-correlation functional of density-functional theory is derived from the universal Lieb-Oxford bound, which holds for any Coulomb-interacting system. This representation leads to an alternative point of view on popular hybrid functionals, providing a…
At low energies, electrons in doped graphene sheets are described by a massless Dirac fermion Hamiltonian. In this work, we present a semi-analytical expression for the dynamical density–density linear-response function of non-interacting massless Dirac fermions (the so-called ‘Lindhard’ function) at finite temperatur…
Biodegradable shape-memory polymer networks prepared by cross-linking star shape branched oligo(ε-caprolactone) (bOCL) with hexamethylene diisocyanate are introduced. The thermal and mechanical properties of these networks were investigated using differential scanning calorimetry and tensile testing, respectively, and…
Room temperature angle-dispersive x-ray diffraction measurements on zircon-type EuVO4, LuVO4, and ScVO4 were performed up to 27 GPa. In the three compounds we found evidence of a pressure-induced structural phase transformation from zircon to a scheelite-type structure. The onset of the transition is near 8 GPa, but t…
We investigate the electron spin relaxation of $n$-type InAs quantum wires by numerically solving the fully microscopic kinetic spin Bloch equations with the relevant scattering explicitly included. We find that the quantum-wire size and the growth direction influence the spin relaxation time by modulating the spin-or…
We have investigated the shifts of the core-level photoemission spectra of La$_{0.6}$Sr$_{0.4}$MnO$_3$ thin films grown on three kinds of substrates, SrTiO$_3$, (LaAlO$_3$)$_{0.3}$-(SrAl$_{0.5}$Ta$_{0.5}$O$_3$)$_{0.7}$, and LaAlO$_3$. The experimental shifts of the La 4d and Sr 3d core levels are almost the same as th…