Materials Literature
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Freely suspended nanocomposite thin films based on soft polymers and functional nanostructures have been widely investigated for their potential application as active elements in microdevices. However, most studies are focused on the preparation of nanofilms composed of polyelectrolytes and charged colloidal particles…
In recent years, rapid technological advancements have led to the development of nanoscale device components, advanced sensors, and novel biomimetic materials. Potential negative impacts of nanomaterials are sometimes overlooked during the discovery phase of research. The use of green chemistry can however enhance nan…
We designed and constructed an extensional rheometer for in situ small and wide angle x-ray study on flow-induced crystallization of polymer. Two rotating drums with an axis distance of 20 mm are employed to impose extensional deformation on the samples. With a constant angular velocity, the two drums generate a const…
Pulsed laser deposition technique was used for the fabrication of (GeTe)1−x(Sb2Te3)x (x = 0, 0.33, 0.50, 0.66, and 1) amorphous thin films. Scanning electron microscopy with energy-dispersive x-ray analysis, x-ray diffraction, optical reflectivity, and sheet resistance temperature dependences as well as variable angle…
Through a systematic theoretical analysis, we find that coarse corrugations textured on rigid surfaces are preferred to realize highly confined surface acoustic waves over a broad frequency range. To give a direct validation for the existence of the nonleaky surface waves, we have experimentally measured the dispersio…
In this study, we discussed a simple hydrothermal synthesis of self-adsorbing mesoporous silica using different templates and pore size engineering under various preparation conditions. The structural properties of the synthesized mesoporous materials were tunable by varying the reaction parameters. A hexadecyltrimeth…
This work presents the accelerated dehydrogenation of ammonia borane (AB) at 85 °C under carbon dioxide atmosphere. The presence of CO 2 significantly enhances the thermolysis kinetics, and the hydrogen release becomes faster as the CO 2 pressure increases from 1.70 to 3.67 bar. Around 4 bar of CO 2, 1.33 equiv of hyd…
Light scattering was used to measure the time-dependent loss of air entrapped within a submerged microporous hydrophobic surface subjected to different environmental conditions. The loss of trapped air resulted in a measurable decrease in surface reflectivity and the kinetics of the process was determined in real time…
The reducing specific absorption rate with metamaterials attachment is investigated in this article. The finite-difference time-domain method with a lossy-Drude model is adopted in this analysis. The technique of specific absorption rate reduction is discussed, and the effects of attaching location, distance, and size…
A review of the corrosion performance of selected canister materials for the disposal of high activity waste in the UK is presented. The canister materials considered are carbon steel, copper, stainless steels, titanium alloys and nickel alloys. The purpose of the review is to provide a high level overview of the tech…
In this study, a new CdTe solar cell structure was proposed, where Zinc Cadmium Sulfide (ZnxCd1-xS) was used as window layer with an added advantage of variable bandgap. By varying the composition of the zinc content, the bandgap was varied between 2.42- 3.7 eV, thereby increasing the cell’s performance in the lower w…
Crystallization of glycine from aqueous Span 80 (sorbitan monooleate) /Brij 30 (polyethylene glycol dodecyl ether) and AOT (sodium dioctyl sulfosuccinate) microemulsions by adding the antisolvent methanol has been studied as a function of increasing initial supersaturation. All three polymorphs of glycine obtainable a…
Clear evidence for two emitting states in PbSe nanocrystals (NCs) has been observed. The flow of population between these two states as temperature increases is interrupted by the presence of nonradiative trap states correlated with the exposure of the NC film to air. Quenching of the higher-energy emission begins aft…
In the Japan Sodium Cooled Fast Reactor (JSFR) design, elimination of severe power burst events in the Core Disruptive Accident (CDA) is intended as an effective measure to ensure retention of the core materials within the reactor vessel. The design strategy is to control the potential of excessive void reactivity ins…
Dimercaptosuccinic acid (DMSA) modified ultra-small particles of iron oxide (USPIO) were synthesized through a two-step process. The first step: oleic acid (OA) capped Fe(3)O(4) (OA-USPIO) were synthesized by a novel oxidation coprecipitation method in H(2)O/DMSO mixing system, where DMSO acts as an oxidant simultaneo…
Graphene is an interesting electronic material. However, flat monolayer graphene does not have significant gap in the electronic density of states, required for a large on-off ratio in logic applications. We propose here a novel device architecture, composed of self-folded carbon nanotube-graphene hybrids, which have…
Monodisperse superparamagnetic Fe(3)O(4)/polymethyl methacrylate (PMMA) composite nanospheres with high saturation magnetization were successfully prepared by a facile novel miniemulsion polymerization method. The ferrofluid, MMA monomer and surfactants were co-sonicated and emulsified to form stable miniemulsion for…
Over a decade has passed since pioneering diffraction experiments on macromolecular microcrystals were performed at the European Synchrotron Radiation Facility. Since then the measurement of high-quality diffraction data for the purpose of structure determination has been transformed from a specialized experiment into…
Polycrystalline (PC) and single crystalline (SC) Ca-doped LaCoO3 (LCCO) samples with the perovskite structure were synthesized by conventional solid-state reaction and the floating-zone growth method. We present the results of a comprehensive investigation of the magnetic properties of the LCCO system. Systematic meas…
In situ synchrotron radiography has been used to observe the evolution of two-dimensional pits growing in stainless steel foils under electrochemical control in chloride solutions. A method for extracting the key kinetic parameters from radiographs is under development to provide data for validating and calibrating a…