Materials Literature
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The development of innovative terahertz (THz) imaging systems has recently moved in the focus of scientific efforts due to the ability to screen substances through textiles or plastics. The invention of THz imaging systems with high spatial resolution is of increasing interest for applications in the realms of quality…
Mechanically durable, long-lasting antifog coatings based on polysaccharides were developed using a layer-by-layer (LBL) assembly process. The unique properties of these coatings are a result of a molecular-level blending of the polysaccharides, with multilayers containing chitosan and carboxymethyl cellulose providin…
Monohydroxy alcohols show a structural relaxation and at longer time scales a Debye-type dielectric peak. From spin-lattice relaxation experiments using different nuclear probes, an intermediate, slower-than-structural dynamics is identified for n-butanol. Based on these findings and on translational diffusion measure…
Abstract Graphitic carbons with ordered mesostructure and high surface areas (of great interest in applications such as energy storage) have been synthesized by a direct triblock‐copolymer‐templating method. Pluronic F127 is used as a structure‐directing agent, with a low‐molecular‐weight phenolic resol as a carbon so…
Advanced techniques for bulk fabrication and loss reduction provide good prospects for practical optical metamaterials.
The adsorption of natural organic matter (NOM) to the surfaces of natural colloids and engineered nanoparticles is known to strongly influence, and in some cases control, their surface properties and aggregation behavior. As a result, the understanding of nanoparticle fate, transport, and toxicity in natural systems m…
The Widom line and the liquid–liquid critical point of water in the deeply supercooled region are investigated via computer simulation of the TIP4P/2005 model. The Widom line has been calculated as the locus of compressibility maxima. It is quite close to the experimental homogeneous nucleation line and, in the region…
We report the observation of local structural dipoles that emerge from an undistorted ground state on warming, in contrast to conventional structural phase transitions in which distortions emerge on cooling. Using experimental and theoretical probes of the local structure, we demonstrate this behavior in binary lead c…
Using micro-Raman spectroscopy, the thermal conductivity of a graphene monolayer grown by chemical vapor deposition and suspended over holes with different diameters ranging from 2.9 to 9.7 μm was measured in vacuum, thereby eliminating errors caused by heat loss to the surrounding gas. The obtained thermal conductivi…
High-performance asymmetric super-capacitors containing thick-film electrodes (over 100 μm thick) made of CNT/V2O5 nanowire composite are designed. The excellent conductivity, high specific capacitance, and a large voltage window of the CNT/V2O5 nanocomposite enable the fabrication of devices with high energy and high…
The time evolution of the local chain persistence determined by small-angle X-ray scattering (SAXS) in the aggregation kinetics of vinyltriethoxysilane(VTES)-derived organic/silica hybrids has been analyzed by the classical Sharp and Bloomfield (SB) model, by a mass-fractal Unified Function (UF) with an arbitrary mass…
In an organic conductor β″-[bis(ethylenedithio)tetrathiafulvalene]3(HSO4)2, characteristic voltage oscillation is observed in the negative differential resistance region of the nonlinear conductivity below the metal–insulator transition at 125 K. The observed frequency f is 4–25 kHz and increases linearly with the col…
The 0.5Bi0.8La0.2FeO3–0.5PbTiO3 (BLF-PT) solid solution nanoparticles of different particle sizes are prepared using sol-gel method and characterized in terms of the size-dependent crystal structure, Raman scattering, dielectric susceptibility, and magnetism. Upon decreasing particle size, the crystal structure evolve…
We have fabricated a magnetoelectric laminate structure composed of magnetostrictive Tb0.3Dy0.7Fe1.92 (Terfenol-D) alloy and LaMnO3+δ (LMO)/0.67Pb(Mg1/3Nb2/3)O3–0.33PbTiO3 (PMN–PT) structure where the LMO film is epitaxially grown on the piezoelectric PMN–PT single-crystal substrate. When an external dc magnetic field…
The effect of four types of silane coupling agents on the mechanical and thermal properties of silicone rubber and ethylene–propylene–diene monomer (M-class) rubber (EPDM) blends is studied, namely, isobutyltriethoxysilane (BUS), acryloxypropyltriethoxysilane (ACS), aminopropyltriethoxysilane (AMS), and vinyltriethoxy…
The effects of gas adsorption and high current on the field emission characteristics of ZnO nanoneedles grown directly from metal electrodes have been systematically investigated. Exposure of nanoneedles to H2, N2, or O2 gas degraded the field emission characteristics, with O2 having the strongest impact. Complete rec…
The potential of hysteresis loop-based methods for the characterization of granular magnetic materials is investigated in the presence of thermal relaxation effects. Specifically, we study the reliability of the ΔH(M,ΔM)-method to recover the intrinsic switching field distribution in the presence of thermal relaxation…
A facile solution chemistry is demonstrated to fabricate high-quality polycrystalline strontium ruthenium oxide (SrRuO 3 ) thin film electrodes on silicon substrates suppressing the formation of undesired ruthenium oxide (RuO 2 ) for the deposition of dielectric and ferroelectric materials like lead lanthanum zirconat…
An original two-step “three phase” elastic–viscoplastic scale transition model is developed based on the combined self-consistent and Mori–Tanaka schemes. A coated inclusion is embedded within a matrix, wherein the inclusion represents grain interiors and the coating of the inclusion mimics the effects of grain bounda…
The most commonly used heavy-atom derivative, selenium, requires the use of a tunable beamline to access the Se K edge for experimental phasing using anomalous diffraction methods, whereas X-ray diffraction experiments for selenium-specific ultraviolet radiation-damage-induced phasing can be performed on fixed-wavelen…