Materials Literature
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An asymmetric conducting polymer/polyoxometalate (POM) supercapacitor was designed using polypyrrole/phosphomolybdic acid and poly(3,4-ethylenedioxythiophene)/phosphotungstic acid as electrode materials. Performance characteristics were measured by cyclic voltammetry and constant current discharge. Energy density and…
The inhibition of the corrosion of mild steel in hydrochloric acid solution by the extract of Kalmegh ( Andrographis paniculata ) leaves extract has been studied using weight loss, electrochemical impedance spectroscopy, linear polarization, and potentiodynamic polarization techniques. Inhibition was found to increase…
The sodium intercalation compound , more commonly , was studied as a potential positive electrode in an aqueous electrolyte hybrid energy storage device. Varying ratios of precursors were used in a solid-state synthetic route in an effort to compensate for volatile loss of sodium during processing. The powders were ch…
The last century witnessed the emergence of polymer science and technology that enabled the generation of knowledge and techniques to control the size, shape, structure, properties and functions of polymers to generate polymers with unprecedented properties and functions. There have been many attempts to apply this in…
Single-walled carbon nanotubes (SWNTs) are encapsulated with microenvironments of nonpolar solvent, providing a new method to measure the photophysical properties of nanotubes in environments with known properties. Photoluminescence (PL) and absorbance spectra of SWNTs show solvatochromic shifts in 16 nonpolar solvent…
Zinc substituted cobalt ferrite nanoparticles (CoxZn1-xFe2O4, with x = 0.0, 0.2, 0.4, 0.8 and 1.0) were prepared via sol-gel route and the effect of zinc concentration on saturation magnetization and lattice parameter were investigated. The particle sizes of the as obtained samples were found to be ~10 nm which increa…
On the Electrochemical Behavior of Aluminum Electrodes in Nonaqueous Electrolyte Solutions of Lithium Salts, Markovsky, Boris, Amalraj, Francis, Gottlieb, Hugo E., Gofer, Yossi, Martha, Surendra K., Aurbach, Doron
We present the first of two articles on the small volume fraction limit of a nonlocal Cahn–Hilliard functional introduced to model microphase separation of diblock copolymers. Here we focus attention on the sharp-interface version of the functional and consider a limit in which the volume fraction tends to zero but th…
A photochromic inorganic-organic hybrid based on in situ generated MV(2+) cation (MV(2+) = methyl viologen = N,N'-dimethyl-4,4'-bipyridinium) has been obtained, in which a vagarious partial photochromic phenomenon together with its photoluminescence modulation properties are reported for the first time in the inorgani…
AIM: To investigate the mechanism by which galangin, a polyphenolic compound derived from medicinal herbs, induces apoptosis of hepatocellular carcinoma (HCC) cells. METHODS: The 3-(4,5-dimethyl-thiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay was used to measure cell viability. Apoptosis was evaluated by in situ…
Silicon nitride (Si 3 N 4 ) ceramic is a promising ultra-high speed (> 5 mach) broadband (1-18 GHz) radome material because of its excellent high-temperature resistance, good mechanical and dielectric properties.Si 3 N 4 ceramics with A-sandwich wall structure are successfully applied to passive self-direction high tr…
A new class of carbazole derivatives was facilely synthesized by Wittig–Horner and Suzuki reactions, and their thermal and photophysical properties were investigated. They exhibited aggregation-induced emission enhancement (AIEE) characteristics and high thermal stability. The glass transition temperatures (Tg) of the…
Recently, solid state photovoltaic Schottky diodes, able to detect ionizing radiation, in particular, x-ray and ultraviolet radiation, have been developed at the University of Rome “Tor Vergata.” We report on a physical and electrical properties analysis of the device and a detailed study of its detection capabilities…
The cationic polysaccharide chitosan possesses bioactive properties such as antimicrobial activity, antitumor effects, hemostatic assets and positive effects on wound healing. The influence of polycations like chitosan on human cells has been reported to depend on their molecular weight. However, the mechanism of cyto…
Here, we report the preparation of Ce(3+) and Tb(3+) co-doped sodium yttrium fluoride nanorods and NaYF(4):Ce(3+)/Tb(3+) core-shell nanoparticles by the emulsion method. The core-shell nanoparticles are confirmed by X-ray diffraction study and transmission electron microscopy (TEM) analysis. The hexagonal crystal phas…
TiO2 hollow nanofibers have been fabricated by directly annealing electrospun polyvinylpyrrolidone (PVP)/Tetra-butyl titanate (TBT) composite nanofibers. In this approach, PVP/TBT composite fibers were first synthesized by electrospinning PVP/TBT solution, and then calcined at high temperature with an appropriate heat…
Mesoporous silica nanoparticles (MSNs) have emerged as promising drug carriers. Here we highlight some recent developments related to cell-specific targeting and delivery using MSNs. Some key requirements for carrier design are discussed from a biological perspective, including a suggested experimental work-flow for t…
The self-assembly process is a bottom-up approach and is the spontaneous aggregation of many different subunits into well-defined functional structures with varying properties. Self-assembly is an attractive method to develop one-dimensional nanostructures and is controlled by many factors including temperature, pH an…
A simple and convenient methodology to fabricate silver-coated Au@SiO2 core/shell nanomaterials (Au@SiO2@Ag nanostructures) is developed by cyclic electroplating and stripping of AgNO3 on the surface of Au@SiO2 core/shell nanoparticles, and the proposed nanostructures served as sensitive and reproducible surface-enhan…
Progress in solid fuel utilization in fuel cells relies on devising effective delivery mechanisms for solid fuel and oxygen to the electrochemical reaction site. This paper provides a mechanistic overview of the different delivery modes and vehicles that have been adopted for engaging solid fuel and oxygen at the elec…