Materials Literature
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A facile and novel strategy for preparing polyaniline/polyvinyl alcohol (PANI/PVA) composite emulsion is reported wherein the reaction is carried out via the emulsion polymerization using ammonium peroxydisulfate (APS) as the oxidizing agent and dodecylbenzene sulfonic acid (DBSA) as the protonic acid. The PANI/PVA co…
Final properties and behavior of polymer parts are known to be directly linked to the thermomechanical history experienced during their processing. Their quality depends on their structure, which is the result of the interactions between the process and the polymers in terms of thermomechanical kinetics. To study the…
Power system oscillations arise from various sources. One contributor that is difficult to quantify during operation is the induced (air-gap) torque. This paper presents a new approach for measuring the instantaneous air-gap torque in real-time for synchronous generators. This is achieved through recent progress in na…
Eu 2+ doped M-phase BaAl 2 Si 2 O 8 phosphors have been synthesized by the solid state reaction. The structure, photoluminescence and relations between the structure and luminescence have been investigated and discussed. These phosphors showed the Eu 2+ broad band excitation and emission spectra. The excitation band c…
The present work introduces a new procedure to obtain gold nanoparticles (AuNPs). AuNPs (77–213 nm) were obtained in the absence of any classical reducing agents in a medium containing Mg 2+ /Al 3+ layered double hydroxide (LDH) and N,N ‐dimethylformamide. XRD analysis showed the presence of crystalline phases of gold…
Copper and zinc are common elements in paint residues and can be toxic to estuarine organisms. This study aims to determine the labile dissolved and labile particulate fractions (LPFs) of copper and zinc in the estuarine waters of a shipyard in southern Brazil under different salinity levels and in different seasons.…
PbSe quantum dots ( QD s) were grown in high‐refractive‐index low‐melting‐temperature lead‐phosphate glass. The lowest energy exciton transition of the QD s was tuned over a wide range within the infrared spectral region (0.93–2.75 μm) by a controlled heat treatment. The measured QD radius ranged between 2 and 5.3 nm,…
A novel structure of dual-composite right/left-handed transmission line (D-CRLH-TL) is proposed in this paper, and its electromagnetic characteristics are investigated in theory and simulation. The dispersion curve of the proposed structure has been derived by using Bloch-Floquet theory. The structure is composed with…
We demonstrated large-area, high density, hexagonal close-packed, single crystalline metal (Au, Ag) nanocrystal arrays with controllable crystal sizes of tens of nanometers, center-to-center spacing and uniform size distribution by colloidal lithography and the surface energy driven dewetting process. Larger than 30 ×…
Core–sheath fibers with the core component being a luminescent nanocomposite and the sheath component being poly(vinyl pyrrolidone) were prepared via the method of co-axial electrospinning; the luminescent nanocomposite consisted of a silicone rubber matrix with the complex Eu(TTA)3phen (TTA: 2-thenoyltrifluoroacetone…
1,5-Bis(3-methylimidazole-2-selone)pentane (Pbis), which belongs to the coordination chemistry of organochalcogenone compounds, was used as a novel Se precursor to purposely synthesize various metal selenide nanostructures. By this method, CdSe, Bi2Se3, ZnSe and PbSe have been successfully prepared and all exhibit rel…
Using a mono-pyrene terminated hyperbranched polyglycidol (mPTHP) as a building block, one-dimensional (1D) mPTHP and mPTHP/gold nanoparticle (Au NP) nanostructures are fabricated in the presence of HAuCl4. By simply mixing mPTHP and different concentrations of aqueous HAuCl4 solution at room temperature, mPTHP nanofi…
We have investigated the specific contributions of titanium-hydride precipitates to the improvement of electrical conductivity and strength for Cu–0.36 mol% Ti alloys aged in a hydrogen atmosphere at 773 K, where Cu4Ti phase is not to appear. During the aging, titanium-hydride particles, which have a composition of H/…
Plate culturing techniques are important in many biological experiments, though plate culturing of diatoms, especially Centrales species, is difficult. In this study, we tested the simple decantation method for dispersing cells on an agar plate with a finely dimpled surface for culturing the Centrales diatom Chaetocer…
Chemical and physical characterization of nanomaterials is essential to improve synthesis processes, for new technological and commercial applications, and to assess their toxicity through in vitro and in vivo studies. New nanomaterials and new synthesis processes are continuously tested and updated to exploit their i…
Magnetic susceptibility measurements show weak ferromagnetic exchange between the copper(II) ions of a novel triazolopyridine derivative [Cu(TPT)(H2O)2(BF4)](BF4)·2H2O (TPT = 3-{6-([1,2,3]triazolo[1,5-a]pyrid-3-yl)-2-pyridyl}-[1,2,3]triazolo[1,5-a]pyridine). Mononuclear [Cu(TPT)(H2O)2(BF4)]+ entities are connected thr…
First-principles calculations show the sensitivity of zigzag edge BC3 ribbons towards hydrogen passivation. Removal of passivating hydrogen atoms from edge boron atoms stabilizes the ribbons due to the enhancement of π-conjugation along the edge and results in metallic behaviour arising from robust edge states, which…
This Viewpoint reflects on the work published in J. Chem. Soc., Chem. Commun. in 1977 by the Nobel Prize winners Shirakawa, MacDiarmid and Heeger. This paper, which is one of the most cited ChemComm articles of all time, motivated the rapid development of conducting (conjugated) polymers and the birth of plastic elect…
Conducting polymer–amino acid hybrid materials have been prepared by conjugating poly(3,4-ethylenedioxythiophene) (PEDOT) and an amino acid bearing a 3,4-ethylenedioxythiophene (EDOT) ring as a side group. Two amino acids have been designed, synthesized and characterized. These compounds differ in the presence or not…
A novel sol-gel synthesis route is reported which results in the formation of optically transparent silica based hydro- and xerogels from an aminosilane precursor in aqueous solutions. These materials can be used for entrapment of microalgae and light-harvesting complex (LHC) samples.