Materials Literature
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X-ray diffraction (XRD), dielectric constant (ɛ′), dielectric loss factor (ɛ″), and ac conductivity (σac) of pure and LaCl3-doped polyvinylidene fluoride (PVDF) have been carried out. The dielectric properties have been studied in the temperature and frequency ranges; 140–450 K and 0.1−1000 kHz, respectively. XRD resu…
BACKGROUND: The bacterium Bacillus subtilis, which is not a natural riboflavin overproducer, has been converted into an excellent production strain by classical mutagenesis and metabolic engineering. To our knowledge, the enhancement of riboflavin excretion from the cytoplasm of overproducing cells has not yet been co…
We have demonstrated the key components of the Racetrack Memory. In particular, we have shown that a series of DWs can be moved at high speed along magnetic nanowires by using nanosecond long current pulses for both in-plane and perpendicularly magnetized racetracks. The spacing between DWs has been reduced significan…
The magnetic microstructure of nanostructured ferromagnets is represented by an ensemble of stochastic magnetic domains—regions with dimensions of the length of magnetic orientation coherency. It is shown that the curves displaying the approach of magnetization to saturation make it possible to determine the dimension…
A ferrocene modified carbon nanotubes paste electrode (FCMCNTPE) was constructed and used as a fast and sensitive tool for the determination of N-acetylcysteine (NAC) at trace level. It has been shown by direct current cyclic voltammetry and double step chronoamperometry that this sensor can catalyze the oxidation of…
Impact load measurements were carried out in a high-speed cavitation loop by means of a conventional pressure sensor flush-mounted in the region of closure of the cavity where maximum damage was observed. The sensor was dynamically calibrated by the ball drop test technique. Pressure pulse amplitudes were measured at…
The authors report on the self-limiting growth of GaN thin films at low temperatures. Films were deposited on Si substrates by plasma-enhanced atomic layer deposition using trimethylgallium (TMG) and ammonia (NH3) as the group-III and -V precursors, respectively. GaN deposition rate saturated at 185 °C for NH3 doses s…
Hydroxyapatite (HAp)/bacterial cellulose (BC) nanocomposites were prepared by an optimal biomimetic mineralization synthesis approach for bone tissue engineering application. BC with ultrafine three dimensional network was negatively charged by the adsorption of polyvinylpyrrolidone (PVP) to initiate the nucleation of…
For the first time, we report the effect of interference between different optical channels on the two-photon absorption (TPA) process in three dimensions. We have employed response theory as well as a sum-over-states (SOS) approach involving few intermediate states to calculate the TPA parameters like transition prob…
This paper presents experimental studies on streamer and breakdown of synthetic and natural ester liquids with the presence of pressboard interface in a divergent point-plane field under lightning impulse voltage. Based on the current, light signals and streamer images, characteristics of both positive and negative st…
Gold complexes have been explored as metallodrugs with great potential applications as antitumoral agents. In particular, gold-phosphine derivatives seemed quite promising since the use of the antiarthritic auranofin drug (thiolate-Au-PEt3 complex) presented also biological activity against different cancer cells. So,…
Memory is a prerequisite for many electronic devices. Organic non-volatile memory devices based on ferroelectricity are a promising approach towards the development of a low-cost memory technology based on a simple cross-bar array. In this review article we discuss the latest developments in this area with a focus on…
Marine sessile organisms easily adhere to submerged solids such as rocks, metals and plastics, but not to seaweeds and fishes, which are covered with soft and wet ‘hydrogel’. Inspired by this fact, we have studied long-term antifouling properties of hydrogels against marine sessile organisms. Hydrogels, especially tho…
A new class of optical nanoantennas based on dielectric nanoparticles has been proposed and their main characteristics have been analyzed. It has been shown that one dielectric nanoparticle can have the properties of a Huygens element in the optical wavelength range. A Yagi-Uda nanoantenna based on dielectric nano-par…
Struvite crystallization (MgNH(4)PO(4)·6H(2)O, MAP) could be an alternative for the sustainable and economical recovery of phosphorus from concentrated wastewater streams. Struvite precipitation is recommended for those wastewaters which have high orthophosphate concentration. However the presence of a cheap magnesium…
Abstract Efforts directed towards creating new environmentally friendly replacements for existing primary explosives have resulted in development of copper(I) 5‐nitrotetrazolate (DBX‐1). The chemical and physical properties of this material have been extensively investigated and it appears that DBX‐1 is a suitable dro…
We report the synthesis of nano-scaled alumina of varied dimensions through a novel optimized processing of aluminum nitrate. The X-ray diffractometry confirmed the formation of X- and γ- phases of alumina particles in the nano region, depending on the annealing conditions during processing. Subsequently, a detailed m…
The challenges facing the development of environmentally friendly dry cutting technologies for various materials is investigated. The system used for the study includes a cutting tool equipped with inserts from layered composition ceramic with nano-scale multilayer coatings, an ionized gas medium which is supplied int…
Metal ions play important roles in amyloid aggregation and neurotoxicity. Metal-ion chelation therapy has been used in clinical trials for Alzheimer's disease (AD) treatment. Here we report a novel strategy to design and construct a light controlled-release prochelator by using magnetic nanoparticles as a therapeutic…
Using Mie theory and Rigorous Coupled Wave Analysis (RCWA) we compare the properties of dielectric particle and void resonators. We show that void resonators-low refractive index inclusions within a high index embedding medium-exhibit larger bandwidth resonances, reduced peak scattering intensity, different polarizati…