Materials Literature
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We present a theoretical study of the optical conductivity of graphene with magnetic and nonmagnetic adatoms. First, by introducing an alternating potential in a pure graphene, we demonstrate a gap formation in the density of states and the corresponding optical conductivity. We highlight the distinction between such…
ABSTRACT We investigated the interfacial properties of poly(vinyl alcohol) carrying UV‐crosslinkable pendant quaternized stilbazole (styrylpyridinium), PVA‐SbQ. The extent and dynamics of PVA‐SbQ cyclodimerization reactions and crosslinking induced by UV irradiation were monitored in situ and in real time by quartz cr…
Using self-consistent quantum transport simulations, we investigate the performance variability of monolayer molybdenum disulfide (MoS2) field-effect transistors (FETs) with various contact properties. Varying the Schottky barrier in MoS2 FETs affects the output characteristics more significantly than the transfer cha…
Abstract Molekulare Hydride der Seltenerdmetalle spielen eine wichtige Rolle als homogene Katalysatoren und als Modelle für Einlagerungshydride im Festkörper. Mit strukturell gut charakterisierten Hydridkomplexen vom Nichtmetallocen‐Typ lassen sich Elementarreaktionen studieren, die an Seltenerdmetallzentren ablaufen.…
The onset of an edge crack in compressive layers of a ceramic laminate undergoing residual stresses is predicted using the stress–energy coupled criterion based on the data of the tensile strength and the toughness of the material under consideration. The proposed criterion does not contain any adjustable parameter, w…
Tungsten (W) and beryllium (Be) have been chosen as plasma-facing materials for the ITER reactor and the main fuel component will be deuterium (D). Due to plasma–wall interactions, these materials will immediately mix via erosion, transport and re-deposition. We present the first atomistic study on the effect of D co-…
We investigate the valley-dependent transport of a graphene system consisting of a uniaxially stretched graphene sheet connected by two unstrained parts, with the interfaces between the strained and unstrained regions along the zigzag direction. A detailed study on the Fabry–Pérot states in the strained region reveals…
A synthetic procedure to prepare novel materials (surface-mediated fillings) based on robust hierarchical monoliths is reported. The methodology includes the deposition of a (micro- or mesoporous) silica thin film on the support followed by growth of a porous monolithic SiO2 structure. It has been demonstrated that th…
Identifying solvent- and catalyst-free conditions for polymerizations of engineering thermoplastics is of increasing interest due to new polymer processing technologies such as 3-D printing. We report the selective formation of linear poly(aryl ether sulfone)s (PESs) from the polycondensation of trimethylsilyl-protect…
The studies on doped ZnO thick films deposited over large surface area are still a very promising area of research and development. We report characteristic properties of thick film of Zn 0.97 Cu 0.03 O prepared by the economic screen printing technique. The film was characterized by XRD, SEM, diffused reflectance, FT…
We report the temperature-dependent Raman spectra for high-density single-walled carbon nanotube thin films. We show that the position of the main Raman mode (G) softens as the temperature increases and is nonlinear in the range of 70–270 K. This effect is explained by optical phonon decay. In the linear regime, the f…
The photoluminescence (PL) properties of Indium Oxide (IO) and In–In <sub>2</sub> O <sub>3</sub> core–shell nanorods have been studied at different temperatures in order to understand the role of metal–oxide interfaces and defects on PL emission.
In this paper, we reported a very simple and environmentally friendly procedure for the synthesis of bright luminescent and nearly monodisperse Ag nanoclusters stabilized by a poly(N-vinylpyrrolidone) homopolymer. In this synthesis route acetonitrile or N,N-dimethylformamide (DMF) acts as both solvent and a reducing a…
The controlled assembly of randomly dispersed colloidal particles can provide access to materials with advanced optical and electronic properties while providing fundamental insights into self-assembly processes in nature and nanotechnology. Typically, self-assembled nanoparticles are prepared by exploiting electrosta…
The introduction of small amounts of carboxylic multi-walled carbon nanotubes into regio-regular poly(3-hexylthiophene) (P3HT) can vary the structure and optical properties of the polymer. The microstructure of the composite film was analysed by various techniques including x-ray diffraction, ultraviolet–visible optic…
Precise positioning of nitrogen-vacancy (NV) centers is crucial for their application in sensing and quantum information. Here we present a new purely optical technique enabling determination of the NV position with nanometer resolution. We use a confocal microscope to determine the position of individual emitters alo…
A simple and label-free fluorescent assay for the sensitive determination of biological thiols was developed using Au@Ag nanoclusters. The sensing approach was based on the strong affinity of thiols to silver on the surface of the nanoclusters. In the presence of thiol-containing amino acids, the fluorescence of the A…
Abstract A linear tetraphosphine, meso‐bis[(diphenylphosphinomethyl)phenylphosphino]methane (dpmppm) was used to synthesize linear octapalladium‐extended metal atom chains as discrete molecules of [Pd 8 (μ‐dpmppm) 4 ](BF 4 ) 4 ( 1 ) and [Pd 8 (μ‐dpmppm) 4 L 2 ](BF 4 ) 4 (L=2,6‐xylyl isocyanide (XylNC; 2 ), acetonitril…
Plasmonic resonances of metal-based nanoparticles are increasingly used for ultrasensitive imaging assays. In this context, the Cytoviva(TM) microscopy platform has greatly gained in popularity. In essence, Cytoviva is an optimized dark field microscope that permits detection of particles down to a few nanometers in s…
An alternating voltage induced method has been developed for the fabrication of porous Co <sub>3</sub> O <sub>4</sub> sheets.