Materials Literature
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This work investigates the hydrogen evolution process on magnesium by real time imaging of the corroding surface at the free corrosion potential and during potentiodynamic polarization in alkaline and neutral environments, in the presence and absence of chloride ions. High-magnification imaging of the corrosion proces…
For multi-phase intermetallic particles consisting of both θ-and S-phase, de-alloying occurred preferentially at S-phase and the de-alloying of θ-phase initiated in the regions surrounding S-phase. The selective dissolution of Al from θ-phase resulted in porous copper-rich θ-phase remnant, comprised of randomly orient…
A one-step hydrothermal method for synthesizing nitrogen-doped graphene quantum dots (N-GQDs) from organic carbon sources is presented in this paper. The high-quality N-GQDs can be obtained via tuning the degree of dehydration/carbonization of citric acid and doping of nitrogen atoms into the graphene lattice. The mic…
The formation of the Ti-MoS2 interface, which is heavily utilized in nanoelectronic device research, is studied by X-ray photoelectron spectroscopy. It is found that, if deposition under high vacuum (∼1 × 10(-6) mbar) as opposed to ultrahigh vacuum (∼1 × 10(-9) mbar) conditions are used, TiO2 forms at the interface ra…
The polyfunctional nature of chitosan enables its application as a polymer ligand not only for the recovery, separation, and concentration of metal ions, but for the fabrication of a wide spectrum of functional materials. Although unmodified chitosan itself is the unique cationic polysaccharide with very good complexi…
Ultrathin membranes with intrinsic pores are highly desirable for gas separation applications, because of their controllable pore sizes and homogeneous pore distribution and their intrinsic capacity for high flux. Two-dimensional (2D) covalent organic frameworks (COFs) with layered structures have periodically distrib…
Low toxic graphene quantum dot (GQD) was synthesized by pyrolyzing citric acid in alkaline solution and characterized by ultraviolet--visible (UV-vis) spectroscopy, X-ray diffraction (XRD), atomic force microscopy (AFM), spectrofluorimetery and dynamic light scattering (DLS) techniques. GQD was used for electrode modi…
Magnesium borohydride (Mg(BH4)2) shows interesting properties both from fundamental and applicative points of view. Mg(BH4)2 has the most complex crystal structures and the largest number of phase polymorphs among other borohydrides. Some of these polymorphs possess a significant porosity, and on the other hand ultra-…
The study of heterogeneous catalytic reactions remains a major challenge because it involves a complex network of reaction steps with various intermediates. If the vibrational spectra of individual molecules could be monitored in real time, one could characterize the structures of the intermediates and the time scales…
An average-atom ($A$-atom) embedded-atom-method potential for random multicomponent alloys at any composition is derived analytically and validated by comparing $A$-atom and true random alloys bulk and defect properties, in model Fe-Ni-Cr systems. The $A$-atom can be mixed with the individual alloying-element potentia…
In this paper, we present a comprehensive review of research on electrical and charge transport properties of spin crossover complexes. This includes both the effect of spin-state switching on the dielectric permittivity and electrical conductivity of the material and vice versa the influence of an applied electrical…
Surfactant-free tiny Pt clusters were successfully encapsulated within MOFs with controllable size and spatial distribution by a novel kinetically modulated one-step strategy. Our synthesis relies on the rational manipulation of the reduction rate of Pt ions and/or the growth rate of MOFs by using H2 as assistant redu…
Selective inhibition of cancer cells remains a challenge in chemotherapy. Here we report the molecular and cellular validation of enzyme-instructed self-assembly (EISA) as a multiple step process for selectively killing cancer cells that overexpress alkaline phosphatases (ALPs). We design and synthesize two kinds of D…
This study was conducted in Northeastern part of Jeddah city. Calotropis procera plant was used as bioindicator and phytoremediator of contamination with heavy metals arising from the cement factory located in this area. Three study sites were chosen, the first site (control) where C. procera plants growing 4.88 km fa…
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Using rigorous coupled wave analysis (RCWA) and finite element method (FEM) simulations together, many interesting ellipsometric measurements can be investigated. This work specifically focuses on simulating copper grating structures that are plasmonically active. Looking at near-field images and Mueller matrix spectr…
Abstract The electrical property of thin-layer black phosphorus (BP) was explored using a simple dry transfer method, which greatly reduced the fabrication time to carry out electrical measurement starting from an initial state with little degradation. As a result, the as-prepared BP field-effect transistor (FET) exhi…
The paper reviews current literature concerning silsesquioxane nanocomposites as potential nanocarriers in contemporary teranostics. It describes synthetic methods leading to functionalized silsesquioxanes (POSS), including dendrimers as well as organo-inorganic copolymers studied as covalent composites and systems fo…
The structural and magnetic properties of ball-milled Fe-doped Y Co5−xFex(0 ≤ x ≤ 0.5) were investigated. The magnetization increases with Fe-doping up to the solid solubility limit, x = 0.3 without destroying the crystal structure or degrading the coercivity. A special magnet array is designed using ring magnets for…
Abstract The present paper investigated the impact of cerium on the corrosion resistance of zinc coating in a 5 % NaCl solution. Electrochemistry was used to measure the electrochemical parameters to compare the corrosion resistance of the zinc coating with that of the cerium conversion coating on the galvanized layer…