Materials Literature
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In situ synchrotron X-ray diffraction was used to study the deformation behavior of a Ti–17Nb–1Cr alloy at room temperature. Stress-induced martensite (SIM) transformation increased the total recoverable strain. A maximum of ∼3.5% strain recovery was obtained after proper heat treatment. Unlike other alloys with a bcc…
Angiogenesis is an essential process for tumor progression. Tumor vasculature-targeting peptides have shown great potential for use in cancer imaging and therapy. Our previous studies have shown that GEBP11, a novel vasculature-specific binding peptide that exhibits high affinity and specificity to tumor angiogenesis,…
The structural characteristics of polymer nanocomposites with functionalized multiwall carbon nanotubes (MWCNTs) in poly(methyl methacrylate) matrix have been studied in relation to nanofiller loading and surface functionality. Different functional groups have been covalently attached on the MWCNTs sidewalls in order…
As thermoelectric devices begin to make their way into commercial applications, the emphasis is put on decreasing the thermal conductivity. In this purely theoretical study, finite element analysis is used to determine the effect of a supporting material on the thermal conductivity of a thermoelectric module. The simu…
The punch shear properties of three-dimensional carbon/epoxy braided composites were studied at quasi-static and high strain rates with finite element method at microstructure level. A microstructure model was developed to analyze the stress distribution and progressive damage of the braided composite panel with diffe…
An understanding of load sharing among constituent phases aids in designing mechanical properties of multiphase materials. Here we investigate load partitioning between the body-centered-cubic iron matrix and NiAl-type precipitates in a ferritic alloy during uniaxial tensile tests at 364 and 506 °C on multiple length…
Spectroscopic data in our investigation, combined with those in references, are used to construct an energy diagram of the typical Lu3Al2Ga3O12:Ln(2+)/Ln(3+) phosphors. Based on the diagram, the persistent luminescence properties of Lu3Al2Ga3O12:Ln(2+)/Ln(3+) (Ln = La-Yb) phosphors are theoretically predicted. We have…
Waterborne polyurethane (WPU) prepolymer was synthesised by the reaction of poly(butylene itaconate) ester (PBI, Mn = 1109 g/mol), 1,6-hexanediol, dimethylol propionic acid (DMPA), 2,4-toluene diisocynate (TDI), hydroxyethyl acrylate (HEA), and absolute ethanol as blocking agent, triethylamine as neutralizer. Cross-li…
Developing an economic and efficient approach for the production of adipic acid is a grand challenge in the chemical industry. Toward this goal, we report a simple method for selective synthesis of adipic acid from cyclohexane with NO 2 by using Ni–Al–VPO/MCM-41 as catalyst. The physical-chemical properties of support…
AIM: To perform one-pot synthesis of heparin-immobilized polypyrrole (PPy) nanoparticles and evaluate the use of these nanoparticles for the delivery of VEGF. MATERIALS & METHODS: Heparin-stabilized synthesis of PPy nanoparticles was performed via oxidative polymerization. VEGF-bound PPy-heparin nanoparticles were del…
Bufadienolide-type cardiac glycosides have a worldwide distribution and are mainly synthesized by plants, but there are also animal sources. In South Africa, members of three genera of the Crassulaceae (Cotyledon, Tylecodon and Kalanchoe) cause a unique chronic form of cardiac glycoside poisoning, predominantly in sma…
This paper examined the evolution of microstructure and its effect on the mechanical and tribological properties of ultralow friction Ti-doped diamondlike carbon (DLC) films, by adjusting the CH4/Ar ratio under constant radio frequency discharge power and bias. The Raman, high resolution transmission electron microsco…
ABSTRACT Applying an electric field is an efficient way to fabricate polymer/clay nanocomposites. It helps to achieve a good dispersion of nanoclays which improves the performance of the polymeric system. In this study, the effect of an alternating current (A.C.) electric field was investigated on clay exfoliation wit…
Using density functional perturbation theory, we investigated the effect of various substitutional dopant elements and in-plane strain on the piezoelectric properties of ZnO. The piezoelectric stress constant e33 of doped ZnO was found to depend on the formal charge of the substitutional dopant. By decomposing the pie…
In this paper, an ionogel‐gated flexible 3D graphene transistor made from graphene foam, consisting of a network of few layers graphene, is reported. The presented transistor, fabricated on thin, 28 μm parylene, flexible substrate, demonstrates low‐voltage operation (≤2.5 V) and exhibits 4.78 times higher current capa…
Incorporating boron nitride nanotubes (BNNTs) into ceramic matrices is a promising strategy for obtaining multifunctional composites. In this study, the application of BNNTs in reinforcing β-tricalcium phosphate (β-TCP) scaffolds manufactured using laser sintering is demonstrated. BNNTs contribute to the effective inh…
The authors report a single-step, green, and rapid synthesis of zinc oxide (ZnO) nanoparticles using coffee powder extract as a nontoxic and eco-friendly reducing material under microwave irradiation. Excellent reproducibility of ZnO nanoparticles, without the use of any additional capping agent or stabilizer has been…
The article concerns the widespread issue of thermal comfort; investigations into textiles and thermal insulation problems are presented. Materials that were tested include double-layer knitted fabrics with potential application in multi-layer garments addressed to a specific group of users. The investigated materials…
A better insight in heat and mass transport across interfaces of biomaterials with their environment, particularly at the microscale, is a key element in improving dehydration processes. Recent advances in interfacial drying are targeted, including evaporation from microscopic pores, droplets or microperforated membra…
Biodegradable and hydrophilic functional polyesters were synthesized enzymatically using xylitol or d-sorbitol together with divinyl adipate and lipase B from Candida antartica (CAL-B). The resulting polyesters had pendant OH-groups from their sugar units which were esterified to different degrees with stearic acid ch…