Materials Literature
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Purpose A multinuclei imaging setup with the capability to acquire both sodium ( 23 Na) and proton ( 1 H) signals at 9.4 Tesla is presented. The main objective was to optimize coil performance at the 23 Na frequency while still having the ability to acquire satisfactory 1 H images. Methods The setup consisted of a com…
Generalized adequacy criteria for mathematical models in order to discriminate materials in X-ray inspection systems by the dual-energy method were developed. Two main approaches of the examination systems to produce the adequacy criteria by the final and the intermediate parameters of the dual-energy method were anal…
Silicon carbide particle (SiCp)/aluminum (Al)-silicon (Si) composites with the addition of cerium (IV) oxide (CeO2) were fabricated by powder metallurgy. The effect of cerium (IV) oxide content on microstructures, friction, and wear properties of the SiCp/aluminum-silicon composites were investigated. The modification…
A new species of the genus Williamsella (Fragilariophyceae) is described from a saline lake in southern Iraq. Williamsella iraqiensis sp. nov. was found free living and as epiphyte on Chara sp. in Sawa Lake. This species is the second described of the genus Williamsella which was originally reported from Blue Lake war…
In this paper, two pretreatment methods of silicon carbide (SiC) particles were adopted: washing by hydrochloric acid (HCl) and high-temperature oxidation after washing by hydrochloric acid. The powder metallurgy method was used for better controllability of the prepared particles of the silicon carbide-reinforced alu…
Aragonite whiskers (AWs) were treated with several fatty acid surfactants and silane coupling agent in order to determine the optimal modifier by using contact angle measurements. The results revealed that the AWs modified by fatty acids showed more remarkable increase in the contact angle than by silane, suggesting t…
Purpose – This paper aims to illustrate how sensors can be fabricated by combining nanomaterials with micro-electromechanical system (MEMS) technology and to give examples of recently developed devices arising from this approach. Design/methodology/approach – Following a short introduction, this paper first identifies…
ABSTRACT A facile click chemistry approach to the functionalization of three‐dimensional hyperbranched polyurethane (HPU) to graphene oxide (GO) nanosheets is presented. HPU‐functionalized GO samples of various compositions were synthesized by reacting alkyne‐functionalized HPU with azide‐functionalized GO sheets. The…
Purpose – The purpose of this paper is to improve the quality of additive manufactured optically translucent parts by investigating the manufacturing issues, analyzing lithophane production criteria and identifying the best translucent material and additive manufacturing (AM) technology. Design/methodology/approach –…
A series of pyrroles functionalized in the 3-position with p-dimethoxybenzene via various linkers (CH2, CH2CH2, CH=CH, C≡C) has been synthesized. Their electronic properties have been deduced from (1)H NMR, (13)C NMR, and UV-vis spectra to detect possible interactions between the two aromatic subunits. The extent of c…
This is a study on the magnetism of a Fe 2 O 3 @MCM-41 composite made up of iron(III) oxide nanocrystals of average length size of 4 nm embedded in the channels of a MCM-41 mesoporous matrix. Through Mössbauer spectroscopy, X-ray absorption experiments and static and dynamic magnetic measurements, we identify the gues…
A series of poly(ether imide)s are investigated using positron annihilation lifetime spectra [PALS] and gas permeation measurements. The glass transition temperature Tg, determined by differential scanning calorimetry, does not correlate with the void sizes calculated from density or determined by PALS, implying that…
The structural, elastic, electronic and optical properties of the platinum-based superconductor SrPt3P under pressure are investigated by the generalized gradient approximation with the Perdew–Burke–Ernzerhof exchange-correlation functional in the framework of density-functional theory. The calculated structural param…
ABSTRACT Real flow field has been critical in all kinds of injection molding, not only for understanding morphological evolution, but also for tailoring polymer physical property. Since the relaxation of PS phase in the HDPE matrix is successfully retarded by introduction of additional gas cooling, here, the second fl…
A crystal-plasticity-based damage model that incorporates material length-scale through use of the slip-plane lattice incompatibility is developed with attention to the physical basis for the evolution of damage in a “bulk” shear deformation and without resort to ad hoc measures of shear deformation. To incorporate th…
Polarization-sensitive devices rely on meta-materials to exhibit varying degrees of absorption of light of a given handedness. The chiral surface states of a topological insulator selectively absorb right- and left-circularly polarized light in the vicinity of the Dirac cone reaching its maximum of unity at the Γ poin…
Recently, a dynamic vortex Mott transition has been observed in an array of superconducting nanodots. Here, we report the effect of the interaction of microwave radiation on this system and we show the occurrence of giant Shapiro steps.
In the field of drug delivery, many different carrier systems have been described to date, including nanoparticles, micelles, liposomes, and water-soluble polymer conjugates, where the active compound could be either incorporated non-covalently or linked to its carrier by a degradable chemical bond. In this study, we…
An electrospun poly( m-anthranilic acid)/poly(ε-caprolactone) nanofiber mat was fabricated with functionalization of the surface with streptavidin which can enhance the cell attachment and proliferation. Poly(ε-caprolactone) as biodegradable, biocompatible, and electrospinnable polymer was blended with poly( m-anthran…
The graphene coplanar waveguide (CPW) has recently been found to have large insertion loss (typically larger than 50 dB/100 μm), which mainly results from the large resistance of graphene. The poor radio-frequency transmission property of graphene hampers its application in interconnect, a low loss material is thus re…