Materials Literature
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In this work, a novel approach for the functionalization of electrospun stereocomplex polylactide (sc-PLA)-based fibers, prepared from solutions containing equimolar amount of high-molecular-weight poly( l -lactide) (PLLA) and poly( d -lactide) (PDLA), was developed. The method, which consists in introducing functiona…
A novel method for the rapid hydrogenation of graphene oxide (GO) is established using nickel nanoparticles (Ni NPs) and through electrochemical reaction. In-situ generated hydrogen and enhanced spillover on graphene sheet makes the hydrogenated graphene oxide (HGO) easily at room temperature. Initially, a well interc…
In this study, three novel luminescent nanofibrous metal-organic gels (MOGs) have been synthesized by the reaction of 1,3,5-tris(3-pyridylmethoxyl)benzene (L) with chloride salts of Cd(II), Hg(II), and Cu(II). The metal-ligand coordination, intermolecular π-π stacking and several other weak interactions found to play…
L-Phenylalanine L-phenylalaninium bromide (LPLPB), an amino acid non-centrosymmetric crystal having a large second harmonic generation (SHG) efficiency, being 4.5 times that of KH2PO4 (KDP), has been successfully grown using a slow evaporation method employing a temperature gradient technique. The structure of the gro…
The antibacterial properties of nanoparticles (NPs) can be significantly enhanced by increasing the wettability or solubility of NPs in aqueous medium. In this study, we investigated the effects of the stabilizing agent on the solubility of silver NPs and its subsequent effect on their antimicrobial activities. Silver…
The mechanism for the decreasing critical temperature (T(C)) of the metal-insulator transition (MIT) in vanadium dioxide (VO2) by tungsten (W) doping is a matter of debate. Here, to clarify the correlation between W doping and T(C), the electronic and geometrical structures around W and V atoms in W(x)V(1-x)O2 samples…
A new method has been proposed for the synthesis of nano- and microdiamonds with various contents of luminescent silicon-vacancy (Si-V) and nitrogen-vacancy (N-V) centers at high static pressures in growth systems based on mixtures of hydrocarbon, fluorocarbon, and organic silicon compounds without catalyst metals. Th…
Electrostatic gating of ultrathin films can be used to modify electronic and magnetic properties of materials by effecting controlled alterations of carrier concentration while, in principle, not changing the level of disorder. As such, electrostatic gating can facilitate the development of novel devices and can serve…
Graphene quantum dots (GQDs) have attracted a great deal of interest from the viewpoints of both fundamental studies and applications. Photoluminescence (PL) is one of the intriguing properties of GQDs, however, the mechanism of the PL in GQDs is not fully understood. In the present study, a drastic change in the PL f…
Porous MnO2 nanostructure with large surface area and large pore volume was prepared by a facial chemical method in large scale. The physical properties of the as-prepared MnO2 were characterized by X-ray diffraction (XRD) analysis, Brunauer-Emmett-Teller (BET) method and scanning electron microscope (SEM). The effect…
Integrating catalytic functions into polymeric vesicles through enzyme entrapment is appealing for bioreactor fabrication, yet there are critical issues regarding the regulation of solute transport through membranes and enzyme loading without denaturation. Polyion complex vesicles (PICsomes) with semipermeable membran…
In some applications such as morphing technology, high strain and anisotropic behavior are considered a good advantage. The corrugated composite sheets due to their special geometries have a potential of high deflection under axial loading. In this research, to investigate the strain and anisotropic behavior of corrug…
The contact of diesel fuel with engine subsystems demands a good wear resistance. Lubricity is an important feature for integrity of injection system and the sulphur composites are primarily responsible for lubrication of the injector nozzle. Biodiesel is responsible for partially restoring the lubricity of diesel fue…
Nowadays, the use of different waste fibers in concrete has started to increase rapidly due to some reasons such as economic savings and positive effects on the environment. In this study, waste steel wires taken from reinforcement and formwork which were previously utilized in construction projects, were employed in…
Due to their superior properties such as high specific strength, high creep resistance and high strength at elevated temperatures, aluminum composites reinforced with alumina nano particles are widely used for advanced purposes such as aerospace and auto industries. Lack of an appropriate welding process limits their…
Bio-molecular computing, 'computations performed by bio-molecules', is already challenging traditional approaches to computation both theoretically and technologically. Often placed within the wider context of ´bio-inspired' or 'natural' or even 'unconventional' computing, the study of natural and artificial molecular…
Conventional pneumatic grippers are widely used in industrial pick and place robot processes for rigid objects. They are simple, robust and fast, but their design, motion and features are limited, and they do not fulfil the final purpose. Food products have a wide variety of shapes and textures and are susceptible to…
بهمنظور افزایش عمر اعضای پیوندی، بر روی سطح آن ها پوشش هایی مانند شیشه های زیست فعّال ایجاد می شود تا از خوردگی آن ها در محیطهای بیولوژیکی جلوگیری شود. در این تحقیق، پوشش شیشهی زیست فعّال 45S5 بر روی زیرلایهی فولاد زنگ نزن L316 بهروش سُل- ژِل ایجاد شد و خواص و ویژگی های پوشش با روش های مختلف بررسی شد. با توجه به…
در این تحقیق، تأثیر عوامل دما و زمان کَلسینه شدن و فرایند آسیاکاری بر ترکیبات حاصل از واکنش حالت جامدِ مخلوط کائولن و کَلسیت بررسی شده است. بررسی پیکهای حاصل از آنالیز حرارتی افتراقی (DTA) و الگوی پراش اشعهی X نشان داد که در حدود دمای ˚C 990، ژلنیت بهعنوان فاز اصلی تشکیل میشود و در دمای ˚C 1200، به فاز آنورتیت تبد…
In this paper, the effect of MgCl2 addition on the kinetics of MA spinel formation was investigated. For this purpose, the stoichiometric mixture of MgCO3 and calcined aluminum was calcined at 1100 °C for 1 hr. Then, the calcined composition was wet-milled and after addition of 6% MgCl2 the compositions were pressed a…