Materials Literature
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We propose an effective strategy to enhance and modulate the photoluminescence (PL) of graphene quantum dots (GQDs) in the vicinity of a single silver nano-octahedron (SNO) utilizing three-dimensional finite-difference time-domain calculations. The SNO is designed to act as a multifrequency plasmonic antenna with mult…
That′s below the belt: Porous BCNO materials with tunable ultra-narrow pore widths (0.4–1.1 nm) were prepared and investigated with regard to H2 storage. The as-prepared samples show similar belt-like morphologies, chemical compositions, surface areas, and pore volumes. The difference in H2 sorption behavior for the m…
The time dependency of water repellency (WR) in hydrophobic porous media plays a crucial role for water infiltration processes after rainfall and for the long-term performance of capillary barrier systems. The contact angle (CA) of hydrophobic media normally decreases with continuous contact with water, eventually all…
This article reports the studies of the effect on waves propagating in silver metal due to L-nihility . For this purpose, a plane wave is considered to be incident from air to half space of silver metal (), and the response of metal is observed at the L-nihility frequency which falls within the optical frequency range…
An optical limiting effect in multiwall carbon nanotubes was modulated by using a two-wave mixing experiment assisted with a mechanical actuator. We employed a 532 nm wavelength and 1 ns pulse duration for exciting the nonlinear optical absorption. The nanotubes were prepared by an aerosol pyrolysis method. The result…
Dependence of adhesion properties of epoxidized natural rubber (ENR-50)/acrylonitrile-butadiene rubber (NBR) adhesive on rubber blend ratio and testing rate was systematically studied. Coumarone-indene resin and toluene were used as tackifier and solvent, respectively. The rubber blend ratio was fixed at 0%, 20%, 40%,…
The aim of the study was to examine the role of composition, inclusions, and precipitates on the pitting corrosion resistance of Mn‐alloyed austenitic stainless steels. The pitting corrosion measurements were conducted in three electrolytes: sea water (3.56 wt% NaCl), sulfuric acid (0.5M H 2 SO 4 ), and sulfuric acid…
The title compound, tetrasodium lithium cobalt aluminium hexa-(orthoarsenate), was synthesized by a solid state reaction route. In the crystal structure, Co(2+) ions are partially substituted by Al(3+) in an octa-hedral environment [M1 with site symmetry 2/m; occupancy ratio Co:Al = 0.286 (10):0.714 (10)]. The charge…
Ce ‐doped BaTiO 3 ‐based ceramics were prepared and studied to satisfy ultra‐broad temperature stability (from −55°C to 300°C, capacitance variation rate based on C 20°C is within ±15%). The sample with 0.6 mol% CeO 2 succeeds to achieve this performance with a remarkably high ceiling temperature of 300°C. Meanwhile,…
Summary This paper describes a new diatom species, A ulacoseira calypsi T remarin, T organ & L udwig, from specimens in plankton samples from Á gua P reta lake. This A mazonian lake is a shallow mesotrophic environment situated in northern B razil. The species is characterized by long filaments united by spatulate…
We propose a flat lensing effect using a periodic loss-modulated material. In particular, we consider a two-dimensional square and rhombic arrangement of lossy cylinders embedded in a host media with the same refractive index. The effect is predicted by the dispersion curves obtained by a coupled mode expansion of Max…
We have studied the adsorption and lubricant properties of a multifunctional triblock copolymer poly(L-lysine)-b-poly(acrylic acid)-b-poly(L-lysine). In particular, we investigated the nature of the layer adsorbed under different conditions of polymer and salt concentration and the lubricant properties of the polymer…
The oxygen permeation properties of polypropylene nanocomposites were examined to compare their oxygen-barrier performance as affected by temperature (25–50℃), relative humidity (0–50% RH), and nanoparticle contents. Polypropylene/clay, polypropylene/ZnO composites and polypropylene/clay/ZnO ternary nanocomposites wer…
Textured ceramic fibers were fabricated from the tungsten-bronze-type piezoelectric (KSr2Nb5O15) . Development of crystallographic texture was evaluated through rocking curve analysis and a texture with Lotgering factor of 0.97 was achieved. 1-3 piezocomposites were prepared from the textured fibers and their electric…
Reactions of Nindigo-BF2 complexes with Pd(hfac)2 produced mixed complexes with Nindigo binding to both a BF2 and a Pd(hfac) unit. These complexes are the first in which the Nindigo ligand binds two different substrates, and provide a conceptual link between previously reported bis(BF2) and bis(Pd(hfac)) complexes. Th…
This work presents ${}^{75}$As NMR spin-echo decay rate ($1/{T}_{2}$) measurements in Ba(Fe${}_{1\ensuremath{-}x}$Rh${}_{x}$)${}_{2}$As${}_{2}$ superconductors, for $0.041\ensuremath{\leqslant}x\ensuremath{\leqslant}0.094$. It is shown that $1/{T}_{2}$ increases upon cooling, in the normal phase, suggesting the onset…
Abstract A high surface area, highly mesoporous carbon xerogel was synthesised and used as a support in the preparation of platinum–ruthenium catalysts by different synthetic routes. The platinum–ruthenium carbon xerogel catalysts were physico‐chemically characterised and used for the chemical electro‐oxidation of met…
Abstract A new synthetic entry to iridium Keggin‐type polyoxometalate complexes from [PW 11 O 39 ] 7– and K 3 [IrCl 6 ] under harsh conditions is reported. The complex [PW 11 O 39 IrCl] 5– ( 1 5– ) featuring an IrCl functionality was obtained in high yield and characterized by NMR spectroscopic and ESI‐MS techniques.…
The intercalation of a graphene layer adsorbed on a metal surface by gold or other metals is a standard procedure. While it was previously shown that pristine, i.e., undoped, and nitrogen-doped graphene sheets can be decoupled from a nickel substrate by intercalation with gold atoms in order to produce quasi-free-stan…
We report a new strategy to realize the selective transportation of microdroplets assisted by a superhydrophobic surface with pH-responsive adhesion. On the surface, only basic microdroplets can be pinned and acidic or neutral microdroplets can easily roll off. Therefore, by using the surface as a "mechanical hand", m…