Materials Literature
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The excited state dynamics of correlated electron and electron-phonon systems triggered by an oscillating electric-field pulse of large amplitude are theoretically investigated. A "negative-temperature" state and inversion of electron-electron and electron-phonon interactions are induced even by a symmetric monocycle…
This study investigated fungal spoilage of fruits and vegetables in Saudi Arabia. Activities of cell wall degrading enzymes in fungal isolates were measured. We evaluated the fungicidal activities of chitosan against spoilage fungi. Thirty-three fungal species belonged to 21 fungal genera were collected during this st…
Herein, we investigate the emission properties of Er - BiOCl in the range of ∼500 to 1700 nm under down - (488 and 973 nm) and NIR (telecom - wavelength at ~1500 nm) up - conversion excitation as well high energy X-ray excitation. The dependencies of red (~670 nm) and NIR (~800 nm) to green emission (~543 nm) ratio wi…
We performed phase-field simulations to analyse the interaction of a migrating grain boundary with an evolving second-phase particle. It is found that depending on the difference between the interfacial energies of the particle–matrix interface for the two grain orientations involved and the driving force for grain bo…
Transparent hybrid organic methacrylate capped zirconium oxo-clusters (ZOCs) with thiol-ene monomers. The vinyl capping groups potentially enable the ZOCs to become an integral part of the thiol-ene network. The ZOCs are reasonably soluble in the thiol-ene monomers yielding a loading of 1 wt. -%. The resulting polymer…
We report experimental and theoretical verification of the nature and position of multiple interference points of visible light transmitted through the valve of the centric diatom species Coscinodiscus granii. Furthermore, by coupling the transmitted light into an optical fiber and moving the diatom valve between cons…
Silica nanoparticles were directly coated with cobalt hydroxide by homogeneous precipitation of slowly decomposing urea in cobalt nitrate solution. The cobalt hydroxide was amorphous, and its morphology was nanoflower-like. The BET (Brunauer-Emmett-Teller) surface area of the core-shell composite was 221 m²/g. Moreove…
A novel microwave metamaterial absorber design is introduced along with its manufacturing and characterization. Significant results considering both bandwidth and angular stability are achieved. Parametric analysis and simplified equivalent circuit are provided to give an insight on the key elements influencing the ab…
Biocomposites of low‐density polyethylene (LDPE) and polypropylene (PP) with 5–40 wt% soy flour (SF) are produced by two‐step single‐screw extrusion (SSE) followed by solid‐state shear pulverization (SSSP). The SSE‐SSSP approach overcomes limitations with melt mixing, e.g poor SF dispersion and degradation, and limita…
This study is to develop a method for preparing fluorescent microspheres with steady and strong fluorescence as well as the surface functionality for bioconjugation. Layer-by-layer technique was employed to introduce poly(phenylenevinylene) (PPV) precursor, diazoresin (DAR), and polyanion, including poly(acrylic acid)…
The frequency-dependent conductivity of polyelectrolyte multilayers (PEM) containing gold nanoparticles was investigated as a function of relative humidity (RH). Multilayers were prepared from poly(allylamine hydrochloride) (PAH) and gold nanoparticles (Au-NP). Impedance spectroscopy revealed that the dc conductivity…
Nanostructured Mn 2 Ga alloys with the majority D0 22 phase have been prepared by subjecting ball-milled powders with micron size grains to the supercritical conditions of fluids at high pressure of 850 psi and temperature of 250 °C. The use of supercritical fluids was found to lead to a reduction of grain size from m…
Polypeptides have attracted widespread attention as building blocks for complex materials due to their ability to form higher‐ordered structures such as β ‐sheets. However, the ability to precisely control the formation of well‐defined β ‐sheet‐assembled materials remains challenging as β ‐sheet formation tends to lea…
To design novel nanomaterials, it is important to precisely control the composition, determine the atomic structure, and manipulate the structure to tune the materials property. Here we present a comprehensive characterization of the material whose composition is Au 329 (SR) 84 precisely, therefore referred to as a na…
The aim of this study was to develop and optimise a saikosaponin a and saikosaponin d compound liposome (SSa-SSd-Lip) formulation with reduced hemolysis and enhanced bioavailability. A screening experiment was done with Plackett-Burman design, and response surface methodology of five factors (EPC/SSa-SSd ratio, EPC/Ch…
In this study, graphene-encapsulated silica was synthesized by a hydrothermal reduction strategy. The presence of silica in graphene was identified by Fourier-transform infrared spectrometry, X-ray diffraction and scanning electron microscopy. The graphene-encapsulated silica subsequently was used as adsorbent for mat…
This study investigates phase transformation and mechanical properties of porous NiTi alloys using two different powder compacts (i.e., Ni/Ti and Ni/TiH2) by a conventional press-and-sinter means. The compacted powder mixtures were sintered in vacuum at a final temperature of 1373 K. The phase evolution was performed…
In many applications of scientific and engineering interest the accurate modeling of scattering of linear waves by periodic layered media plays a crucial role. From geophysics and oceanography to materials science and imaging, the ability to simulate such configurations numerically in a rapid and robust fashion is of…
Five unknown taxa belonging to the newly established genus Humidophila were found during ongoing taxonomic revision of the freshwater and limno-terrestrial diatom flora of the Maritime Antarctic Region. These taxa were previously identified as Diadesmis arcuata, D. biscutella, D. comperei and D. ingeae, but detailed l…
This study presents research capabilities of dynamic electrochemical impedance spectroscopy (DEIS) as a tool used for instantaneous online monitoring of corrosion processes on the example of aluminum alloy 7075. A borate buffer with admixed chloride ions in a quantity ranging from 0.05 mM to 25 mM was used to represen…