Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting informati…
Photoexcited dynamics of electrons and holes in semiconductor quantum dots (QD), including phonon-induced relaxation, multiple exciton generation, fission and recombination (MEG, MEF and MER), were simulated by combining ab initio time-dependent density functional theory and non-adiabatic molecular dynamics. These non…
A series of dialdehyde compounds were synthesized and reacted with the complementary triamines (either planar or pyramidal with a 109.5° vertex) in a 3:2 ratio to explore the structural requirements on the building blocks for the successful construction of shape-persistent, covalent organic polyhedrons (COPs). Structu…
„Patchwork“-Graphen: Ein einfaches Syntheseverfahren ohne Katalysator und Lösungsmittel wandelt Glucose direkt in polykristalline Kohlenstoffschichten um, die aus 2–15 nm großen „Kristallflecken“ zusammengesetzt sind. Diese Graphene weisen eine hohe Leitfähigkeit und eine große spezifische Oberfläche auf und sind uner…
The defects in calcium carbonate polymorphs forming when portlandite nanocrystals are exposed to high relative humidity were directly observed and analyzed under high-resolution transmission electron microscopy. The findings provided significant insight into aragonite to calcite phase transformation mechanisms. The ar…
The electronic Lorentz theory is employed to explain the optical properties of planar split-ring metamaterials. Starting from the dynamics of individual free carriers, the electromagnetic response of an individual split-ring meta-atom is determined, and the effective permittivity tensor of the metamaterial is calculat…
A new type of catalytically active self-assembled nanostructures in aqueous solution is presented. Polyelectrolyte-porphyrin nanoscale assemblies consisting of anionic cylindrical poly(styrene sulfonate) brush molecules and cationic tetravalent meso-tetrakis(4-N-methyl-pyridinium)porphyrin (TMPyP) or meso-tetrakis(4-(…
The solvothermal reactions of Ti(OEt)(4) with LnCl(3) (Ln = La, Ce) produced new Ti(28) Ln cages, in which the Ln(3+) ions are coordinated within a metallocrown arrangement, which represents the highest nuclearity cages of this type (see figure).
We present an ultrasonic device with the ability to locally remove deposited layers from a glass slide in a controlled and rapid manner. The cleaning takes place as the result of cavitating bubbles near the deposited layers and not due to acoustic streaming. The bubbles are ejected from air-filled cavities micromachin…
In the present study, contact angle hysteresis and sliding behavior of water droplets on parallel, periodic microgrooved brass surfaces are investigated experimentally for enhancement of water drainage and compared to that on flat baseline surfaces. The surfaces (a total of 17 microgrooved samples, with a range of gro…
This work presents a novel modeling approach to calculate the optical properties of gold nanoparticles coated with stimuli-responsive polymers. This approach combines, for the first time, a molecular description of the soft material with an electrodynamics calculation of the optical properties of the system. A mean-fi…
3-Aminopropyltriethoxysilane (APTES) and perfluorooctyltriethoxysilane (PFES) were used to modify the interface between transferred CVD graphene films and its supporting dielectric to create n-type and p-type graphene, respectively. A graphene p-n junction was obtained by patterning both modifiers on the same dielectr…
Polypropylene/E-glass fiber/nanoclay were compounded with a twin-screw extruder and injection molded. Thermal, dynamic mechanical, and impact tests were carried out. Differential scanning calorimetry investigations showed that the incorporation of nanoclay into polypropylene/glass fiber composite shifted the melting t…
Herein we report a group of five planar chiral molecules as photon-mode chiral switches for the reversible control of the self-assembled superstructures of doped chiral nematic liquid crystals. The chiral switches are composed of an asymmetrically substituted aromatic moiety and a photoisomerizing azobenzene unit conn…
Natural fiber composites are known to absorb more water than glass fiber reinforced composites. In this study, hybrid natural fiber composites were prepared by combining different fiber reinforcements, and both the water absorption and the mechanical properties were studied. Compression molding technique was used to m…
The insulator-metal transition was observed experimentally in nickel monoxide (NiO) at very high pressures of $\ensuremath{\sim}240\text{ }\text{ }\mathrm{GPa}$. The sample resistance becomes measurable at about 130 GPa and decreases substantially with the pressure increase to $\ensuremath{\sim}240\text{ }\text{ }\mat…
Mehr als ein Wasserstoffspeicher: Die erste reversible Abscheidung/Ablösung von Magnesium auf/von einem anorganischen Salz wurde bei einem Magnesiumborhydrid-Elektrolyten beobachtet. In Dimethoxyethan als Solvens wurde eine hohe Coulomb-Effizienz bis 94 % erreicht. Dieser Mg(BH4)2-Elektrolyt wurde in einer wiederaufla…
It is a computationally demanding task to explicitly simulate the electronic degrees of freedom in a system to observe the chemical transformations of interest, while at the same time sampling the time and length scales required to converge statistical properties and thus reduce artifacts due to initial conditions, fi…
The superconducting compound LiFeAs is studied by scanning tunneling microscopy and spectroscopy. A gap map of the unreconstructed surface indicates a high degree of homogeneity in this system. Spectra at 2 K show two nodeless superconducting gaps with ${\ensuremath{\Delta}}_{1}=5.3\ifmmode\pm\else\textpm\fi{}0.1\text…
This work suggests a synthetic method for tubular-shape evolution of amorphous and microporous organic networks. The gradual addition of a dihalo building block to its mixture with tetrakis(4-ethynylphenyl)methane under conventional Sonogashira coupling conditions resulted in the formation of tubular materials. The re…