Materials Literature
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Nitridosilicates are structurally built up on three-dimensional SiN4 tetrahedral networks, forming a very interesting class of materials with high thermomechanical properties, hardness, and wide band gap. Traditionally, nitridosilicates are often used as structural materials such as abrasive particles, cutting tools,…
Electrochemical capacitors, also known as supercapacitors, are energy storage devices that fill the gap between batteries and dielectric capacitors. Thanks to their unique features, they have a key role to play in energy storage and harvesting, acting as a complement to or even a replacement of batteries which has alr…
The well-documented novel performances of graphene make it a potential candidate for a wide range of utilizations, driving research into exploiting unusual properties of this wonder material. This paper reports a facile soft chemical approach to fabricate graphene−Co(OH) 2 nanocomposites in a water−isopropanol system.…
Biomaterials interact with the biological environment at their surface, making accurate biophysical characterization of the surface crucially important for understanding subsequent biological effects. In this study, the surface of polystyrene (PS) was systematically altered in order to determine the effect of plasma t…
This study reports the preparation of ultrathin, transparent graphene films for use in supercapacitor applications. The surface morphology of the films was investigated by scanning electron microscopy and transmission electron microscopy, revealing a very homogeneous surface with intimate contact between graphene shee…
We predict the bulk thermal conductivity of Lennard-Jones argon and Stillinger-Weber silicon using the Green-Kubo (GK) and direct methods in classical molecular dynamics simulations. While system-size-independent thermal conductivities can be obtained with less than 1000 atoms for both materials using the GK method, t…
High absorption efficiency is particularly desirable at present for various microtechnological applications including microbolometers, photodectors, coherent thermal emitters, and solar cells. Here we report the design, characterization, and experimental demonstration of an ultrathin, wide-angle, subwavelength high pe…
As part of continuous search for new chelating agents for transition metal ions, a practical method for the preparation of hydroxybenzyl derivatives of diethylenetriaminepentaacetic acid (DTPA) has been developed in this study. N,N″-bis(2-hydroxybenzyl)diethylenetriamine-N,N′,N″-triacetic acid (HBDTTA) and four other…
The water-confinement of nanosecond-pulsed laser generated plasma provides great potential for preparation of ambient-stable silicon nanocrystals (Si-ncs) with quantum confinement size effect. Here, we report on blue-luminescent Si-ncs prepared by nanosecond KrF excimer laser ablation of doped-crystalline silicon targ…
The UV-vis absorption spectrum of protoporphyrin IX shows a very sharp and strong absorption maximum peak at 398 nm in acetonitrile-water mixture solution (1:1 v/v). When divalent metal ions such as <TEX>$Cu^{2+}$</TEX>, <TEX>$Zn^{2+}$</TEX>, and <TEX>$Ca^{2+}$</TEX> ion were added to protoporphyrin IX, metal protopor…
Novel photoluminescent graphene, graphene/europium/picolinate, was made from the reaction of the graphene carboxylate, europium(III) and <TEX>$\alpha$</TEX>-pyridoin anion in methanol solution. There was evidence on IR spectroscopic data that europium metal was coordinated by graphene carboxylate. The graphene/europiu…
Dendrimers are branched macromolecules that consist of a core, one or more dendrons, and surface groups.Due to their controlled mass, uniform structure, surface functionality and good solubility (relative to linear polymers), they have been studied for a wide range of pharmaceutical applications including solubility e…
About 116 million Mg of rice husk, a byproduct of rice milling, are produced worldwide annually. Rice husk could be used as a soil amendment, but little attention has been given to the effect of its application and dynamic properties in soils. A study was, therefore, conducted to determine: (i) the effect of rice husk…
Single crystals of α-Glycine up to the size of 4 x 4x1 mm3 were grown for optical characterization by the solution growth method using methanol as a solvent. The crystal structure was studied by X-ray diffraction. The UV–visual absorption spectra indicate a good transparency between 200 and 1400 nm. The non-linear ref…
A precursor (H3A) was synthesized by the mono condensation of 2-aminobenzylamine with salicylaldehyde and then a tetradentade Schiff-base ligand (H2L) prepared by using H3A and 3-methoxysalicylaldehyde. The copper(II) complex of this new ligand was prepared and characterized by elemental analysis, electronic absorptio…
Quantum dots (QDs) are extensively employed for biomedical research as a fluorescence reporter and their use for various labeling applications will continue to increase as they are preferred over conventional labeling methods for various reasons. However, concerns have been raised over the toxicity of these particles…
Two different polyoxozirconium oxide clusters tri- and tetranuclear half-zirconocene complexes assisted by 2,3,4,5-tetrafluorobenzoic acid and 3,4,5,6-tetrafluorophthalic acid have been synthesized and characterized by elemental analysis, FT-IR, NMR (1H, 19F, and 13C) spectroscopy, and X-ray crystallography. The struc…
The different parts of Calotropis gigantea and Vinca rosea belonging to the families of Asclepiadaceae and Apocynaceae were studied for their antioxidant and antimicrobial activities against selected bacterial strains. From the results it was evident that the flower of Vinca rosea showed the highest antioxidant activi…
Surface functionalization of multi-walled carbon nanotubes (MWNTs) was carried out by means of acid treatment. The presence of oxygen functional groups on the surface of acid-treated MWNTs was confirmed with the aid of Fourier transform infrared spectroscopy and X-ray spectroscopy. In addition, carboxylic groups gener…
Two new organic–inorganic composite sandwich-type arsenotungstates [H2dap]6H8[Ni4(H2O)2(B-α-AsW9O34)2]2 · 33H2O (1) and {[Ni(dap)2(H2O)]2[Ni(dap)2]2[Ni4(Hdap)2(B-α-AsW9O34)2]} · 4H2O (2) (dap = 1,2-diaminopropane) have been hydrothermally synthesized by reaction of Na8[A-α-HAsW9O34] · 11H2O with NiCl2 · 6H2O in the pr…