Materials Literature
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Wahl der Zustände: Die Oxidation eines Trinitroxid-Trioxytriphenylamins führt zu einer ausgedehnten π-Konjugation, wobei im Grundzustand eine Spinumwandlung von antiferromagnetischer Kopplung im neutralen Spindublettzustand zu ferromagnetischer Kopplung im kationischen Spintriplettzustand stattfindet. Die reversible U…
The low-energy electronic dispersion of graphene is extremely sensitive to the nearest layer interaction and thus the stacking sequence. Here, we report a method to examine the effect of stacking misorientation in bilayer graphene by transferring chemical vapor deposited (CVD) graphene onto monolithic graphene epitaxi…
Fe-Si-Al particles with irregular shapes have been successfully milled into flaky shapes by attrition for 10, 20, and 30 h, respectively. The attrition time has very small effect on the static magnetic properties, but shows strong effects on the high frequency properties (permittivity and permeability). With increasin…
Protein crystallization is important for structural biology. The rate at which a protein crystallizes is often the bottleneck in determining the protein's structure. Here, we give a physical model for the growth rates of protein crystals. Most materials crystallize faster under stronger growth conditions; however, pro…
High-quality compositionally tunable ternary PbSe(x)S(1-x) (x = 0.23, 0.39, 0.49, 0.68, and 0.90) nanowires (NWs) and their binary analogues have been grown using solution-liquid-solid growth with lead(II) diethyldithiocarbamate, Pb(S(2)CNEt(2))(2), and lead(II) imido(bis(selenodiisopropylphosphinate)), Pb((SeP(i)Pr(2…
The electronic structure of the oxychalcogenides LaCuOSe and BiCuOSe has been studied using O $K$-edge x-ray emission spectroscopy, x-ray absorption spectroscopy, and density functional theory, in order to examine the effects of the M${}^{3+}$ ion configurations. The known distortion of the BiO layers in BiCuOSe compa…
When the major ampulate spidroins (MaSp1) are called upon to form spider dragline silk, one of nature's most amazing materials, a small drop in pH must occur. Using a state-of-the-art simulation technique, constant pH molecular dynamics, we discovered a few residues that respond to the pH signal in the dimerization of…
Nanoporous gold is a promising material for multi-functional bio-interfaces with its well-characterized surface chemistry, compatibility with conventional micropatterning techniques, electrical conductivity, and high effective surface-area for molecular release. This paper demonstrates its biocompatibility and capabil…
We use density functional theory to examine the dissociation of halogen molecules on CeO 2 (111). We are interested in this because oxides are used to catalyze the oxihalogenation of alkanes. Our calculations show that the exothermicity of the dissociative adsorption is increased substantially if one of the dissociati…
Low-power-threshold cw laser-induced incandescence (CWLII) has been observed in La(2)O(3):Er(3+)-Yb(3+) phosphor on excitation by a 976 nm IR laser. It is suggested that incandescence originates from the extensive heating induced by the nonradiative processes taking place following the laser excitation. Other mechanis…
Umbilic defects of strength s=±1 were induced in a nematic liquid crystal with negative dielectric anisotropy, confined to Hele-Shaw cells with homeotropic boundary conditions, and their annihilation dynamics followed experimentally. The speeds of individual defects of annihilating defect pairs with strengths of equal…
The thermal decomposition pathways of ammonia borane (AB, NH 3 BH 3 ), lithium amidoborane (LiAB, LiNH 2 BH 3 ), and potassium amidoborane (KAB, KNH 2 BH 3 ) have been investigated in detail by using solid state 11 B MAS NMR spectroscopy. During the first decomposition process of AB, the complex structural entities we…
In this work, the oil palm empty fruit bunch (EFB) fiber was used as a source of lignocellulosic filler to fabricate a novel type of cost effective biodegradable composite, based on the aliphatic aromatic co-polyester poly(butylene adipate-co-terephtalate) PBAT (Ecoflex™), as a fully biodegradable thermoplastic polyme…
Abstract The highly selective and efficient transformation of organosilanes into silanols was achieved using readily available heterogeneous metal nanoparticle catalysts on an aluminum oxyhydroxide support [M/AlO(OH), M=Pd, Au, Rh, Ru, and Cu]. The transformation was performed under ambient conditions with water. Amon…
Spin-state conversion: Oxidation of trinitroxide-trioxytriphenylamine introduces extended π conjugation, resulting in a ground-state spin conversion from the antiferromagnetic coupling in the neutral spin-doublet state to the ferromagnetic coupling in the cation spin-triplet state. The reversible conversion between th…
This study investigates the mechanical reinforcement of chitosan with TiO2 and Ag nanoparticles, as well as their water vapour transmission rates and water resistance behaviour. The mechanical properties of chitosan were improved by addition of TiO2 or Ag, with significant increases in Young’s modulus (from 25 MPa to…
Electrochemical capacitors, also known as supercapacitors or ultracapacitors, have received much attention from research and development to industrialization, owing to their promise to deliver high levels of electrical power and offer long operating lifetimes. They are considered ideal candidates for energy storage in…
This paper reports on direct thermal to electrical energy conversion by performing the Olsen (or Ericsson) cycle on [001]-poled 0.945PbZn 1/3 Nb 2/3 O 3 –0.055PbTiO 3 (PZN-5.5PT) single crystals. The cycle consists of two isothermal and two constant electric field processes. The energy density was found to decrease wi…
Kenaf-derived cellulose (KDC)-filled poly(lactic acid) (PLA) composites were prepared via melt blending and compression molding to improve the properties of PLA by introducing a natural cellulose that was chemically derived (chlorination and mercerization processes) from plant-based kenaf bast fibers. The effect of KD…
In vivo upconversion: Photoresponsive dithienylethene ligands decorated onto lanthanide-doped, upconverting nanoparticles are used to modulate the amount of emission from the nanoparticles. The hybrid system can be toggled between ‘bright’ and ‘dark’ states by using two different types of light in living nematodes (se…