Materials Literature
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The photochromic behavior of the imidazole dimers can be attributable to the photoinduced homolytic cleavage of the C-N bond between the two imidazole rings. On the other hand, although the simultaneous formation of the imidazolyl radical and imidazole anion by the one-electron reduction of an imidazole dimer was repo…
The mechanistic pathways of direct oxidation of methanol to formaldehyde by N 2 O were theoretically investigated by means of density functional theory (DFT) over an extra framework species in ZSM-5 zeolite represented by a [Si 6 Al 2 O 9 H 14 ] 2– [Fe] 2+ cluster model. The catalytic reactivity of these species is co…
A sub-micron thermal transport model based on the phonon Boltzmann transport equation (BTE) is developed using anisotropic relaxation times. A previously-published model, the full-scattering model, developed by Wang, directly computes three-phonon scattering interactions by enforcing energy and momentum conservation.…
The acid-base properties of two raw and purified mixed clays from Burkina Faso were studied, as well as their potential to remove copper(II), lead(II) and chromium(III), and thereby their ability to be used to purify water from heavy metals. The purification procedure of the clays involved removal of carbonates, iron…
Magnetic nanowired substrates (MNWS) have been used for the fabrication of a planar nonreciprocal microstrip device. It shows a differential phase shift of 300 degrees cm-1at K a -band without requiring the application of a dc bias magnetic field, and making it suitable for miniaturized gyrator applications. The nonre…
The deposition of a thin layer of a quantum-cutter material on top of silicon-based solar cells seems to be a promising solution to reduce the thermalization losses. This mechanism has been reported in materials codoped with Pr3+-Yb3+, where Pr3+ can sensitize two Yb3+ ions for one absorbed blue photon. In the present…
A new heterometallic Ni(II)-Cu(II) decanuclear cluster, {[Ni(4)Cu(6)(μ-OH(2))(2)(dpkO(2))(8)(OAc)(4)(H(2)O)(4)]·2CH(3)OH·17H(2)O} (1), has been synthesized by self-assembly of the constituent metal ions and the precursor di-2-pyridylketone (dpk) of multinucleating ligand dpkO(2)(2-) and is structurally characterized.…
Steigerung durch Reduktion: Die Lithiierung des porösen aromatischen Gerüsts PAF-1 (blaue Struktur) führt zu einem reduzierten Gerüst mit höherer Gasspeicherkapazität (um 22, 71 und 320 % für H2, CH4 bzw. CO2 im Vergleich zu PAF-1). Das reduzierte Gerüst wurde spektroskopisch untersucht, und seine potenzielle Wasserst…
Corrosion resistance and the behavior of carbon steel and alloys in high concentration ammonium chloride (NH4Cl) solutions were investigated. This study was conducted to better understand material performance in severe NH4Cl corrosive environments in refineries. Immersion tests were performed under boiling 20 wt% and…
We propose that an impurity-induced electronic nematic state is realized above the orthorhombic structure transition temperature ${T}_{S}$ in iron-pnictide superconductors. In the presence of strong orbital fluctuations near ${T}_{S}$, it is theoretically revealed that a single impurity induces local orbital order wit…
The fabrication of sub-100 nm features with bioactive molecules is a laborious and expensive process. To overcome these limitations, we present a modular strategy to create nanostructured substrates (ca. 25 nm features) using functional block copolymers (BCPs) based on poly(styrene- b -ethylene oxide) to controllably…
Abstract In this study, response surface methodology (RSM) was employed to optimize preparation of chitosan microspheres (CMs). Firstly, Plackett–Burman design (PBD) was applied to screen out the factors, which influence preparation of CMs significantly. The results showed that the concentration of chitosan and acetic…
The effect of ${}^{13}$C isotope impurities on the phonon properties of graphene is discussed theoretically. We calculated the values of the phonon lifetimes due to isotope impurity scattering for all values of densities, isotopic masses, and for all wave vectors using second-order perturbation theory. We found that f…
We identify by ab initio calculations a new cubic carbon phase in $Pa\overline{3}$ (${T}_{h}^{6}$) symmetry, which has a unit cell that comprises eight $s{p}^{3}$-connected C${}_{3}$ triangle rings (thus termed cubic C${}_{3}$). The transformation from graphite occurs via a novel sheet-rumpling mechanism under anisotr…
The nature of the ferromagnetic, charge, orbital, and antiferromagnetic order in La0.35Pr0.275Ca0.375MnO3 on the nano- and microscale was investigated by photoemission electron microscopy (PEEM) and resonant elastic soft x-ray scattering (RSXS). The structure of the ferromagnetic domains around the Curie temperature T…
Many common wound healing aids are created from biodegradable polymeric materials. Often, these materials are unable to induce complete healing in wounds because of their failure to prevent infection and promote cell growth. This study reports the development of therapeutic materials aimed at overcoming these limitati…
We show by density functional theory calculations with both hybrid and semilocal functionals that cubic boron nitride (111) nanofilms are intrinsically metallic and even turn into semiconductors once the thickness is less than 0.69 nm, which is in sharp contrast to the known insulating nature of boron nitride material…
Abstract More and more attention is focused on monodispersed, functionalized microspheres with tunable size. In this article, a facile, efficient self‐assembly process is successfully developed to fabricate novel monodispersed microspheres based on hybrid polyphosphazene, and the size of the microspheres is proven to…
We report the fabrication of high-performance broadband polymer photodetectors based on narrow bandgap conjugated polymers with an inverted device structure, where electrons and holes are collected on indium tin oxide and metal contact with high work function. High-quality wide bandgap vertically aligned ZnO nanowire…
Graphene is emerging as a promising material for plasmonics applications due to its strong light-matter interactions, most of which are theoretically predicted but not yet experimentally realized. Therefore, the integration of plasmonic nanoparticles to create metal nanoparticle/graphene composites enables numerous ph…