Materials Literature
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In the present paper, the changes at interface between calcium carbonate (CaCO3) and polyurethane (PU) matrix in correlation to the mechanical and morphological properties were investigated. The effect of the untreated CaCO3 microfillers versus nanofillers and/or selected silane pretreatment of nanofiller surface were…
In previous research, we found that dimethyloldihydroxyethyleneurea (DMDHEU) is able to covalently bond hydroxy-functional organophosphorus oligomer (HFPO) to nylon and to cotton by formation of a cross-linked polymeric network. In this research, we applied HFPO to two nylon/cotton blend military fabrics using DMDHEU…
We report that a deep ultraviolet (DUV) laser from the sixth harmonic of a 1064 nm laser has been firstly used as light source in an ultrahigh energy-resolution angle-resolved photoemission spectroscopy (ARPES). The wavelength is 177.3nm obtained by using the second harmonic KBe 2 BO 3 F 2 crystal with a frequency tri…
Abstract Chitin is a polysaccharide found in the outer skeleton of insects, crabs, shrimps, and lobsters and in the internal structures of other invertebrates. Sulfated chitin was prepared by reacting carboxymethyl chitin (CM‐chitin) with 2‐aminoethane sulfonic acid by using 1‐ethyl‐3‐(3‐dimethylaminopropyl)carbodiimi…
Abstract The role of adsorption species in reaction solutions has been studied in microwave-polyol synthesis of silver (Ag) nanostructures. When Ag+ ions from AgNO3 were reduced in ethylene glycol by the addition of H2[PtCl6] and poly(vinylpyrrolidone) (PVP), a mixture of one-dimensional (1-D) nanorods and nanowires a…
Abstract We report on the fabrication of all transparent heterojunction thin film diodes of the form glass/n-ZnO: Al/p-CuAlO2 produced by a combinatorial chemical and physical technique and on a study of their electro-optical properties. The n-ZnO: Al layer was deposited by a sol-gel-dip-coating process whereas the p-…
Abstract Three zirconium alloys (Zry-4, Zry-2, and NDA) were corrosion tested at 633 K in pure water and in mixed gas of Ar and oxygen. In both environments, their corrosion rate showed cyclic changes. The time and the weight gain at the transition point changed with their corrosion resistance. In the pure water corro…
Aiming at preparation of shape memory alloys (SMAs), we explored the SHS of Cu1 − x Zn1 − y Al1 − z alloys (0.29 < x < 0.30, 0.74 < y < 0.75, and 0.83 < z < 0.96). The most pronounced shape memory effect was exhibited by the alloys of the following compositions (wt %): (1) Cu(70.6)Zn(25.4)Al(4.0), (2) Cu(70.1)Zn(25.9)…
Ceramic technology is civilisation's oldest tradition and one of our most current areas of knowledge. Pottery, ceramics, and their industrial production materials have been rooted in the historical and cultural structure of a nation and civilisation for thousands of years and retain their importance today. The origin…
Amidos oxidados em elevadas concentrações produzem pastas fluidas, são estáveis à retrogradação e aplicados em indústrias de papel, têxtil e de alimentos. Esta propriedade é atribuída à presença de carboxilas, com cargas negativas e mais volumosas que as hidroxilas. Neste trabalho, amidos de batata, batata doce, mandi…
This chapter provides an overview of some recent research activities on the study of optical and dynamic properties of semiconductor nanomaterials. The emphasis is on unique aspects of these properties in nanostructures as compared to bulk materials. Linear, including absorption and luminescence, and nonlinear optical…
Predominantly (100)-oriented CaBi4Ti4O15 (CBTi) films were fabricated on Pt (111)∕Ti∕SiO2∕Si substrates using a metal organic decomposition method at annealing temperatures ranging from 600to800°C. The growth mode of the predominantly (100)-oriented CBTi films fabricated by the sequential layer annealing method was di…
Abstract In this article, we report molecular dynamics (MD) simulations on the formation of roughness at the surface of strained polycrystalline aluminum samples at 300 K. The computed roughness increases as a function of applied strain but does not follow a linear law for all applied strains. A linear relationship wi…
Four kinds of imidazoline inhibitors with different hydrophilic group, i.e. carboxymertyl imidazoline (CMI-11), hydroxyethyl imidazoline (HEI-11), aminoethyl imidazoline (AEI-11) and imidazoline (IM-11) had been synthesised and characterised by infrared and ultraviolet spectra. The inhibition performance of these imid…
The infrared-to-visible upconversion (UC) in Tm3+-doped TeO2–PbO glass was investigated by exciting the samples with a Q-switched neodymium doped yttrium aluminum garnet laser operating at 1064nm. UC emission bands at ∼454, ∼482, and ∼518nm corresponding, respectively, to the transitions D21→F43, G41→H63, and D21→H53…
Two novel isotypic polyborate cluster compounds Na 5[MB 24O 34(OH) 12]. nH 2O (M = Cr (3+), Al (3+)) have been synthesized in a boric acid flux closed system at 220 degrees C by using gel as precursors. The structure of the Cr compound was determined by low-temperature single-crystal X-ray diffraction, and the Al comp…
The synthesis of ZnO:Eu3+ nanoflowers by a low-temperature hydrothermal route is described. Characterization of the materials was performed by ESEM, XRD and FTIR spectra. The 355 nm excited photoluminescence spectra at 10 K do not indicate the presence of Eu2+ or the ZnO defect states which give rise to green or red b…
Porous titanium coatings on dense Ti6Al4V substrates were made by electrophoretic deposition (EPD) of titanium particle stabilized Pickering emulsions. The samples were consecutively dried and microwave sintered in helium to prevent oxidation. The obtained coatings have a thickness ranging from 50 to 250 μm with open…
In this study, the growth, stochiometry and electrical characteristics of MgO thin films, deposited by electron beam evaporation on Si(100) surfaces, have been investigated. Films of different thicknesses were deposited on HF last and chemical oxide Si(100) surfaces in order to determine the effect of factors such as…
Tailored CuFe2O4/MgFe2O4 and MgFe2O4/CuFe2O4 core/shell nanoparticles were prepared by a precipitation method and their structures investigated by X-ray diffraction and electron microscopy. Vibrating sample magnetometry tests showed that coating CuFe2O4 with MgFe2O4 increased coercivity from 28·87 to 40·46 Oe and decr…