Materials Literature
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Here we use pristine graphene samples in order to analyze how the Raman peaks intensity, measured at 2.41 and 1.96 eV excitation energy, changes with the amount of doping. The use of pristine graphene allows investigating the intensity dependence close to the Dirac point. We show that the $G$ peak intensity is indepen…
We analyze a model that accounts for the inherently large thermal lattice fluctuations associated with the weak van der Waals intermolecular bonding in crystalline organic semiconductors. In these materials the charge mobility generally exhibits a "metalliclike" power-law behavior, with no sign of thermally activated…
The luminescence in a series of new bimetallic gold-silver vapochromic structures can be efficiently switched among different colors simply by exposure to solvent vapors. The emission color in these systems is controlled by both aurophilic interactions and halogen bonding, which affect the emission energy through diff…
A unique purely lanthanide-based single-molecule magnet (SMM) with an oxalate bridge has been designed through a rational synthetic approach. This strategy opens up new opportunities to design SMMs through the premeditated choice of a blocking ligand and suitable oxalate bridge.
We investigate the charge-density wave (CDW) instability in single and double layers, as well as in the bulk $2{\text{H-NbSe}}_{2}$. We demonstrate that the density functional theory correctly describes the metallic CDW state in the bulk $2{\text{H-NbSe}}_{2}$. We predict that both monolayer and bilayer ${\text{NbSe}}…
Despite considerable efforts toward the development of various sophisticated spiropyrans for metal ion sensing, less attention has been paid to organic molecule sensing. One of the major difficulties for detection of organic molecules using a spiropyran is the weak and nonspecific interaction between the spiropyran an…
The most efficient way to pack equally sized spheres isotropically in three dimensions is known as the random close packed state, which provides a starting point for many approximations in physics and engineering. However, the particle size distribution of a real granular material is never monodisperse. Here we presen…
A major goal of materials science is to create new engineering materials and optimize their cost and performance. Understanding how adjacent materials behave at their borders is an essential part of this process. Grain boundaries are the longest-known crystal defects, but although they were discovered in the mid-eight…
We point out that plasmons in doped graphene simultaneously enable low losses and significant wave localization for frequencies below that of the optical phonon branch $\ensuremath{\hbar}{\ensuremath{\omega}}_{Oph}\ensuremath{\approx}0.2\text{ }\text{eV}$. Large plasmon losses occur in the interband regime (via excita…
Partial discharge (PD) is a phenomenon that commonly occurs in the insulation of power system equipment. In this paper, PDs occurring in a single void and multi-voids were investigated. Air voids at atmospheric pressure were injected into cylindrical epoxy resin blocks to create test samples with single void and multi…
Abstract The immobilization of molybdenum (Mo) compounds on poly(4‐vinylpyridine) (P4VP) microspheres for catalytic epoxidation was reported. P4VP‐supported Mo compounds were highly efficient and selective for the epoxidation of cis ‐cyclooctene using hydrogen peroxide (H 2 O 2 ) as oxygen source. When ethanol was use…
A new approach for developing highly sensitive MOS photodetector based on the assistance of anodic aluminum oxide (AAO) membrane is proposed, fabricated, and characterized. It enables the photodetector with the tunability of not only the intensity but also the range of the response. Under a forward bias, the response…
Partial discharge (PD) plays a paramount role in determining system reliability. But noise is always a major limitation of PD measurement. Many research work shows that wavelet transform (WT) has a potential to extract PD pulse from noise environment. De-noising algorithm based on WT has three steps: decomposition, th…
Abstract— Cyclic block copolymers (CBCs) are a new class of optical polymers made by fully hydrogenating block copolymers of styrene and conjugated diene. This class of materials has excellent optical transparency, photostability, and good thermal resistance. By changing the copolymer composition and the resulting blo…
Field emission from carbon nanotubes is studied by propagating the electronic wave function in real time using time-dependent density-functional theory. Complex absorbing potentials have been employed to avoid artificial reflections from the boundaries and to allow long time simulations. Domain decomposition is used t…
The Amazon Rain Forest has attracted worldwide attention due its large scale services to climate and also due to the green house gas emissions arising from deforestation. Contributing to the later and detrimental to the former, timber logging in the region has very low efficiency (only 16% in the production chain). Su…
Poly(ethylene glycol) oligomers have been found to be effective as alternative solvents for the ion exchange of Mn 2+, Fe 2+, and Co 2+ into hydrated and dehydrated Zeolite X (Na 80 Al 80 Si 112 O 384 · n H 2 O). When attempted in aqueous solutions, the exchange of these cations quickly leads to destruction of the zeo…
ADVERTISEMENT RETURN TO ISSUEPREVLetter to the EditorNEXTAssessing the Safety of Nanomaterials by Genomic Approach Could Be Another AlternativeTin-Lap Lee*, Wai-Yee Chan, and Owen M. RennertView Author Information Section on Developmental Genomics, Laboratory of Clinical Genomics, Eunice Kennedy Shriver National Insti…
A novel process that allows selective growth of ZnO nanostructure at room temperature is reported. Various zinc oxide nanostructures were grown on nanoparticle-seeded glass substrates using a new, low cost, and low temperature process. The growth took place in a radio frequency magnetron sputter deposition chamber. Th…
Abstract Graft copolymerization of low‐density polyethylene (LDPE) with a maleic anhydride (MAH) was performed using intermeshing corotating twin‐screw extruder in the presence of benzoyl peroxide (BPO). The LDPE/polyamide 6 (PA6) and LDPE‐ g ‐MAH/PA6 blends were prepared in a corotating twin‐screw extruder. The melt…