Materials Literature
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Resonant metamaterials usually exhibit substantial dispersion, which is considered a shortcoming for many applications. Here we take advantage of the ability to tailor the dispersive response of a metamaterial, introducing a new method of group-velocity dispersion compensation in telecommunication systems. The method…
Photochromic benzocyclophanediene showed oxidation-triggered isomerization to form benzodimethyldihydropyrene. The isomerization proceeded via an autocatalytic reaction system, which could be combined with the photochromic nature of the molecule to establish a new photoelectric signal conversion system.
Interaction of adsorbate on charged surfaces, orientation of the analyte on the surface, and surface enhancement aspects have been studied. These aspects have been explored in details to explain the surface-enhanced Raman spectroscopic (SERS) spectra of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW…
Low-threshold, gain switched colloidal quantum dot (CQD) distributed-feedback lasers operating in the nanosecond regime are reported and proposed for sensing applications for the first time to the authors' knowledge. The lasers are based on a mechanically-flexible polymeric, second order grating structure overcoated w…
Density functional theory and coupled cluster theory were employed to study the activations of CH 4 by neutral lanthanum oxide clusters (LaO(OH), La 2 O 3, La 3 O 4 (OH), La 4 O 6, La 6 O 9 ) as models for the La 2 O 3 catalysts for the oxidative coupling of methane (OCM) reaction. The physisorption energies (Δ H 298…
Toxicity of titanium dioxide nanoparticles (nano-TiO2 ) to aquatic organisms can be greatly increased after exposure to ultraviolet (UV) radiation. This phenomenon has received some attention for water column species; however, investigations of nano-TiO2 phototoxicity for benthic organisms are still limited. In the pr…
The heat capacity of helical magnets ${\mathrm{Cu}}_{2}\mathrm{O}\mathrm{Se}{\mathrm{O}}_{3}$ and MnSi has been investigated at high pressures by the ac-calorimetric technique. Despite the differing nature of their magnetic moments, ${\mathrm{Cu}}_{2}\mathrm{O}\mathrm{Se}{\mathrm{O}}_{3}$ and MnSi demonstrate a surpri…
A multiply parallel implementation of finite element-based discrete dislocation dynamics for arbitrary geometries, Crone, Joshua C, Chung, Peter W, Leiter, Kenneth W, Knap, Jaroslaw, Aubry, Sylvie, Hommes, Gregg, Arsenlis, Athanasios
The renaissance of multiferroics has yielded a deeper understanding of magneto-electric coupling of inorganic single-phase multiferroics and composites. Here, we report charge-transfer polymeric multiferroics, which exhibit external field-controlled magnetic, ferroelectric, and microwave response, as well as magneto-d…
Graphene is a single layer of carbon atoms packed into a honeycomb architecture, serving as a fundamental building block for electric devices. Understanding the fracture mechanism of graphene under various conditions is crucial for tailoring the electrical and mechanical properties of graphene-based devices at atomic…
In recent years, many experimental and theoretical research groups worldwide have actively worked on demonstrating the use of liquid crystals (LCs) as adaptive lenses for image generation, waveform shaping, and non-mechanical focusing applications. In particular, important achievements have concerned the development o…
Abstract The two mononuclear complexes [Ln(tta)3(L)]·C6H14 {Ln = DyIII and YbIII} (tta– = 2‐thenoyltrifluoroacetonate, L = 2‐{1‐methylpyridyl‐4,5‐[4,5‐bis(propylthio)tetrathiafulvalenyl]‐1H‐benzimidazol‐2‐yl}pyridine) are isostructural. The lanthanide ions adopt a distorted‐square‐antiprism coordination polyhedron (D4…
Five new heterobimetallic complexes, namely, {[Ni(L)][Fe(bpb)(CN)2]}ClO4 (L = 2,12-dimethyl-3,7,11,17-tetraazabicyclo[11.3.1]heptadeca-1(17),13,15-triene, bpb(2-) = 1,2-bis(pyridine-2-carboxamido)benzenate) (1), {[Ni(L)]3[M(CN)6]2}·7H2O (M = Fe (2), Cr (3)), {[Ni(L)]2[Mo(CN)8]}·CH3CN·13H2O (4), and {[Ni(L)]2[W(CN)8]}·…
We present an ultracompact electro-optic modulator with a length of 15 nm by utilizing a permittivity-tunable metamaterial channel, which is composed of alternative layers of graphene and silica. Optical waves can propagate through the metamaterial channel only if its permittivity is tuned to be near zero. The finite-…
An overlapping composite track coating was produced on a steel surface by preplacing a 0·5 mm thick layer of TiC powder and then melting using a tungsten inert gas torch of constant energy input. The influence of the overlapping operation on preheating of the substrate, the dissolution of TiC particulates and the subs…
We investigate the interaction of polarized electromagnetic waves with hyperbolic metamaterial structures, whereby the in-plane permittivity component εx is opposite in sign to the normal component εz. We find that when the thickness of the metamaterial is smaller than the wavelength of the incident wave, hyperbolic m…
Abstract A series of lanthanide(III) complexes (Ln = La to Lu) with 2,2′‐bipyridyl‐6,6′‐dicarboxamide ligands were obtained. The X‐ray structure of the di(N‐ethylanilide) of 2,2′‐bipyridyl‐6,6′‐dicarboxylic acid is reported. The structures of the amides in the gas phase were modeled by DFT calculations. The global min…
The piezoelectric properties of tetragonal perovskites $\mathrm{Pb}\mathrm{Ti}{\mathrm{O}}_{3}$, $\mathrm{Ba}\mathrm{Ti}{\mathrm{O}}_{3}$, and $\mathrm{K}\mathrm{Nb}{\mathrm{O}}_{3}$ under uniaxial strain along the [001] direction are calculated from first principles. In order to study the piezoelectric response of in…
Abstract We introduce a nonbonded three-body harmonic potential energy term for Mg?O?H interactions for improved edge surface stability in molecular simulations. The new potential term is compatible with the Clayff force field and is applied here to brucite, a layered magnesium hydroxide mineral. Comparisons of normal…
This study quantitatively explores the mechanisms underpinning the effects of model pharmaceutical polymeric precipitation inhibitors (PPIs) on the crystal growth and, in turn, maintenance of supersaturation of indomethacin, a model poorly water-soluble drug. A recently developed second-derivative UV spectroscopy meth…