Materials Literature
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Abstract Direct incorporation of nano reinforcement fillers has been a challenge for composite design because of strong aggregation. In this article, a stabilizer‐free method is developed to prepare new graphene/natural rubber latex (NRL) composite as the stabilizer ammonium was diffused completely in the final heat v…
Epitaxial strontium titanate (STO) films have been grown by atomic layer deposition (ALD) on Si(001) substrates with a thin STO buffer layer grown by molecular beam epitaxy (MBE). Four unit cells of STO grown by MBE serve as the surface template for ALD growth. The STO films grown by ALD are crystalline as-deposited w…
A different light: The yellow electrochromic copolymer, propylenedioxythiophene phenylene P(ProDOT-Ph) is patterned by the micromolding in capillaries (MIMIC) process to fabricate line gratings. Under illumination by white light, colors are generated by diffraction and can be changed by applying an external voltage (s…
In this study, we systematically investigated various crystal-to-crystal transitions relating to poly(L-lactide) (PLLA) cocrystallized with low-molecular-weight compounds using wide-angle X-ray diffraction and Fourier transform infrared spectroscopy. First, the solvent exchange and the resultant crystal transition of…
Abstract Biosourced poly(lactic acid) (PLA) blends with different content of poly(ethylene oxide‐b‐amide‐12) (PEBA) were prepared by melt compounding. The miscibility, phase structure, crystallization behavior, mechanical properties, and toughening mechanism were investigated. The blend was an immiscible system with t…
Nongray phonon transport solvers based on the Boltzmann transport equation (BTE) are being increasingly employed to simulate submicron thermal transport in semiconductors and dielectrics. Typical sequential solution schemes encounter numerical difficulties because of the large spread in scattering rates. For frequency…
Hochauflösende Photolumineszenzspektroskopie mit Eu3+ als Struktursonde offenbarte einen universalen Gittersymmetriebruch in Lanthanoid-dotierten fehlgeordneten Kristallen. Die spektrale Gittersymmetrie für Eu3+ sinkt von Oh nach Cs (oder C2) in α-NaYF4 und von C3h nach Cs in β-NaYF4. Die Ergebnisse wurden durch Krist…
A series of alkali metal complexes supported by two bulky tetraphenols were synthesized and characterized. The reactions of α,α,α',α'-tetra(3,5-di-tert-butyl-2-hydroxyphenyl)-p-xylene(para-tetraphenol) with (n)BuLi, sodium, and KSi(NMe(2))(3) gave bimetallic complexes 1, 2, and 3, respectively. Treatments of the α,α,α…
Topological constraint theory holds the key to understanding the temperature and composition dependence of the dynamics of glass‐forming liquids. Unfortunately, existing analytical models currently do not apply to multicomponent industrial glasses. Moreover, models that are strictly empirical in nature fail to provide…
Abstract Highly stable graphene oxide (GO)‐based multilayered ultrathin films can be covalently immobilized on solid supports through a covalent‐based method. It is demonstrated that when (3‐aminopropyl) trimethoxysilane (APTMS), which works as a covalent cross‐linking agent, and GO nanosheets are assembled in an laye…
There is a pressing need to improve the ductility of magnesium alloys so that they can be applied as lightweight structural materials. In this study, a mechanism for enhancing the ductility of magnesium alloys has been pursued using the atomistic method. The generalized stacking fault (GSF) energies for basal and pris…
A chemically patterned surface was formed by controlled evaporative self-assembly of concentric polymer stripes, followed by the removal of weakly deposited polymer, giving ultrathin polymer stripes with a width gradient on the Si substrate (see picture). A thin film of diblock copolymer hierarchically self-assembled…
Kinetic energy barriers that have entirely different origins are the reasons for the impedance of the catalytic N2O/CO redox cycle mediated by both [YAlO2]+. and [Y2O2]+. clusters (see scheme). While oxidation with N2O is the bottleneck for [YAlO2]+., oxidation of [Y2O2]+. with N2O is possible, but reduction of [Y2O3]…
Cu(I) catalyzed azide-alkyne cycloaddition (CuAAC) reactivity was successfully employed to synthesize three donor-acceptor energy transfer (EnT) arrays that contain one (Dyad), three (Tetrad) and four (Pentad) 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) donors connected to a Zn-tetraphenylporphyrin acceptor vi…
Neutron crystallographic analyses at near-atomic resolution are presented for both reduced and oxidized forms of perdeuterated Pyrococcus furiosus rubredoxin, a small iron–sulfur redox protein with remarkable thermostability. Hydronium ions may play a key role in the protonation and charge-transfer processes associate…
Thermal decomposition of Ag 2 CO 3 to Ag 2 O was investigated to identify the physicochemical events that occur during the reaction and to reveal the interactions that cause the complex kinetic behavior of the reaction. Based on comparative investigation of thermal decomposition behavior of six different commercially…
Exfoliation, i.e. individual separation of carbon sheets, is of great interest to produce single-layered graphene nanosheets. Chemical or thermal treatments are popular approaches to exfoliate graphite chunks. In general, these conventional methods are assisted with intercalation via covalent or non-covalent functiona…
Abstract Recent theoretical and experimental studies have proposed a two-step mechanism for crystal formation in which crystal nucleation is preceded by formation of disordered molecular assemblies. Here, we investigated whether similar intermediates might also form as crystals dissolve, effectively the reverse proces…
A novel hierarchical ZnO nanostructure array composed of nanosheet branched (NB) ZnO nanorods (NRs) has been fabricated using a two-step solution reaction. The obtained nanosheet branched (NB) ZnO nanorods (NRs) exhibited considerably enhanced light capturing compared with ZnO thin films and ZnO nanorods. This combine…
Direct synthesis of silicon carbide ( SiC ) nanopowders (size 50–200 nm, BET ~20 m 2 /g) in Si – C system is conducted in an inert atmosphere (argon) using a self‐propagating high‐temperature synthesis ( SHS ) approach. A preliminary short‐term (e.g., minutes) high‐energy ball milling ( HEBM ) of the initial mixture,…