Materials Literature
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High pressure torsion (HPT) is an important process for producing ultrafine grained materials, and while numerous experimental investigations of HPT have been carried out, most concentrated on microstructure, texture, or the mechanical properties of the processed materials, while few work has been carried out by using…
We show that a bilayer graphene ribbon deposited above a ferromagnetic insulator can behave as a spin-filtering device. The ferromagnetic material induces exchange splitting in the graphene ribbon, and due to the Fano antiresonances occurring in the transmission of the graphene ribbon as a function of ribbon length an…
We propose efficient schemes for universal quantum gates with the photon polarization states and electron spin states of nitrogen-vacancy (NV) centers in diamond embedded in optical microcavity. A hybrid polarization-spin controlled-NOT gate and a two-qubit controlled phase gate between NV centers in separated cavitie…
We performed light optical diffraction experiments on a nanoparticle-polymer volume holographic grating in an angular range including far-off-Bragg replay. A comparison of three diffraction theories, on the same level of complexity, with our experimental results shows that the dynamical theory of diffraction and the f…
A tubular direct carbon fuel cell (DCFC) based on a general anode support solid oxide fuel cell was fabricated and studied. For this purpose, we fabricated tubular anode support tubes through an extrusion process, and the essential fuel cell components, the electrolyte and the electrode, were coated on the surface of…
This Technical Report revises ISO/TR 19319:2003 —Surface chemical analysis—Auger electron spectroscopy and X‐ray photoelectron spectroscopy—Determination of lateral resolution, analysis area and sample area viewed by the analyser. The revised Technical Report gives a short introduction to basic models of image formati…
We compare the two-photon absorption (2PA) spectra of non-centrosymmetrical metal-free tribenzo-tetraazachlorin (H2TBTAC) and analogous symmetrical tetra-tert-butyl-phthalocyanine (H2TtBuPc). Surprisingly, despite formal lack of center of inversion, the 2PA spectrum of H2TBTAC displays a two-photon allowed transition…
For the first time, photoluminescence properties of four polysilylcarbodiimides, comprised of a phenyl pendant group attached at the silicon atom and a second substituent being either phenyl ( S1 ), methyl ( S2 ), hydrogen ( S3 ) or vinyl ( S4 ), are reported. Distinctive fluorescence emissions are detected in the pol…
Beige kaolin clays were crushed and sieved. The mineral was characterized by X-ray diffraction and chemically analyzed by atomic absorption spectrophotometry. The material below 37 microns was leached with oxalic acid. A study of main variables of the leaching process in different ranges was realized: time (0 to 120 m…
Abstract A new class of poly(ether ketone)s (PEKs) is prepared by polycondensation of various diols produced from biomass and various difluoro aromatics. After optimization of the reaction conditions, polycondensation of isosorbide and 4,4′‐difluorodiphenylketone (2a) gives PEK1 with a high yield, moderate viscosity (…
We investigated the abilities of a family of tau-protein-related amphiphilic peptides with predictable self-association characteristics (N-acetyl-VQIVXK-NH2 (X = F, L, V, W, Y, A, K)) to disperse single-walled carbon nanotubes (SWCNTs). The dispersion abilities of these peptides could be explained by a linear combinat…
Public health awareness has increased in the past few years regarding the disposal of chromated copper arsenate (CCA) preservative-treated wood wastes. This study demonstrates the potential for using remediated CCA lumber and alternative fiber sources, such as sugar cane bagasse, to produce medium density fiberboard (…
The CuCoO<sub>2</sub> sample has been synthesized by a conventional solid-state reaction method to investigate electronic transport and optical properties for <i>p</i>-type transparent conducting oxide materials. The crystal structure was characterized by XRD. The Seebeck coefficient and electrical conductivity were m…
Silicon-rich Al2O3 films (Six(Al2O3)1-x) were co-sputtered from two separate silicon and alumina targets onto a long silicon oxide substrate. The effects of different annealing treatments on the structure and light emission of the films versus x were investigated by means of spectroscopic ellipsometry, X-ray diffracti…
We employ GaS 0.4 Se 0.6 nonlinear crystal for difference-frequency generation between the signal and idler pulses of a synchronously pumped femtosecond optical parametric oscillator at 80 MHz achieving continuous tuning from 4 μm (>12 mW) to 12 μm (>0.5 mW) with almost bandwidth limited mid-infrared pulses of ∼200 fs…
An acrylic and two novel allylic monomers synthesized from bis (hydroxyethyl) terephthalate, BHET, are reported. This was obtained by glycolysis of post-consumer PET with boiling ethylene glycol. The bifunctional monomer bis(2-(acryloyloxy)ethyl) terephthalate was obtained from acryloyl chloride, while the allylic mon…
In this paper, a highly sub-wavelength double negative (DNG) metamaterial for operation at high frequencies is designed, fabricated, and measured. A dual layer design that consists of a planar spiral on one side and a meander line touching with narrow metallic strips on the other side produces the properties of effect…
The successful synthesis and outstanding properties of graphene have promoted strong interest in studying hypothetical graphene-like silicon sheet (silicene). Very recently, 2D silicon nanosheet (Si-NS) stabilized by hexyl groups was reported in experiment. We here present an atomic-level investigation of the geometri…
ABSTRACT Here we report the preparation of PEG‐based thermoresponsive hyperbranched polymers via a facile in situ reversible addition‐fragmentation chain transfer (RAFT) copolymerization using bis(thiobenzoyl) disulphide to form 2‐cyanoprop‐2‐yl dithiobenzoate in situ . This novel one‐pot in situ RAFT approach was stu…
The chiral-flexoelectrooptic effect in a Uniform Lying Helix (ULH) configuration provides a sub-millisecond in-plane rotation of the optic axis with the application of a transverse field. This enables displays with a wide viewing angle without costly in-plane-type electrodes. The salient challenge is one of alignment…