Materials Literature
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Here, we utilize a computational bottom-up approach to decipher the size effects of poly(alanine) crystalline subunits as they occur in most spider silks on silk fiber mechanics. We vary the crystal size in terms of their cross-sectional area, i.e. the number of layers of β-strands, S, in the crystal and the backbone…
Oil-in-water and water-in-oil capsules, and flat membranes of tuneable thickness and composition were prepared in one single facile step, based on the interfacial complexation between chitosan and anionic phosphatidic fatty acids. The phosphatidic acid molecules were introduced via the oil phase. The thickness of the…
<i>Background:</i> Candidal meningitis is a common clinical manifestation of invasive candidiasis in neonates. The aim of this study was to evaluate the in vivo antifungal efficacy of CG<sub>3</sub>R<sub>6</sub>TAT nanoparticles, novel core-shell structures self-assembled from catio…
Y(2)O(3) nanoparticles with strong red luminescence (quantum yield about 25%) was synthesized via simple hydroxylation of yttrium nitrate using hexamethylenetetramine as an additive; the red luminescence is emitted from oxygen-related defects of pure Y(2)O(3) nanoparticles, and is tunable by altering the additive.
Oxidative polymerization of aniline in aqueous solution in the presence of trehalose was conducted. Fourier transform infrared spectroscopy confirmed successful preparation of polyaniline containing a trace amount of trehalose. Electron spin resonance spectroscopy revealed that electron spin concentration of the polya…
In this article, the buckling analysis of a double-walled carbon nanotube (DWCNT) subjected to a uniform internal pressure in a thermal field is investigated. The effects of the temperature change, the surrounding elastic medium based on the Winkler model, and the van der Waals forces between the inner and the outer t…
Trinuclear rare-earth metal complexes [M₃(taciH₋₃)₂](3+) (M = La(3+), Y(3+)), based on a rigid polyamino-polyalcohol ligand 1,3,5-triamino-1,3,5-trideoxy-cis-inositol (taci), are proven to be efficient catalysts for the hydrolysis of 2-hydroxypropyl-4-nitrophenyl phophate (HPNP), a commonly used RNA model system.
The effects of nickel oxide (Ni2O3) additives on electrical characteristics and microstructural phases of ZnO varistors with low residual voltage ratio are studied. The breakdown electrical fields increase remarkably with the amount of the doped nickel oxide increased. The minimum of the residual voltage ratios of the…
We report an experimental study that points out the existence of a fluid to soft-glass transition in Langmuir polymer monolayers of poly(methyl methacrylate) (PMMA), for which the water/air interface behaves as a poor-solvent. The temperature dependence of surface pressure vs. surface area equilibrium isotherms shows…
Novel shuttle-like CaWO4 hierarchical nanostructures were synthesized by a poly(diallyldimethyl-ammonium chloride) (PDDA)-assisted hydrothermal route. The morphology, crystallinity, and composition of the nanostructures were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (…
The Langmuir–Blodgett (LB) method was used for depositing cubic polyhedral oligomeric silsesquioxanes (T8POSS) onto Au, indium tin oxide (ITO) and mica supports. Three different T8POSS were examined; two were amphiphilic and aggregated upon transfer to a solid support, while the highly symmetric POSS (termed MP8) gave…
This paper describes an MOCVD technique for producing both monolithic and compositionally graded BaxSr1-xTiO3 (BST) thin films for tunable RF device applications. Specifically, we describe a “multiple injection flash evaporation” technique, which can easily produce BST thin films with a wide variety of compositional g…
Nanotechnologies have the potential to offer many opportunities for innovation in the food sector with applications in agriculture, water treatment, food production, processing, preservation and packaging. Whilst nanotechnologies may offer benefits in food and food packaging, the use of nanoscale materials may also pr…
A decavanadate/chitosan complex was synthesized by crosslinking chitosan with decavanadate anions at a pH of 3. The materials were characterized by Fourier transformed infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), absorption spectroscopy (UV-Vis), and transmission elec…
The three stage Indian nuclear power programme envisages efficient use of its modest uranium resources and full exploitation of its vast Thorium resources. Indian economy is on a fast growth track. The growth in population and economy is creating huge demand for energy which has to be met with environmentally benign t…
A simple filtration technique was developed to prepare large scale free-standing close-packed gold nanoparticle ultrathin films using metal hydroxide nanostrands as both barrier layer and sacrificial layer. As thin as 70 nm, centimeter scale robust free-standing gold nanoparticle thin film was obtained. The thickness…
An electrochemical reaction cell using a solid electrolyte was developed to study the thermodynamic and kinetic behavior of interfacial oxides. Al2O3 and TiO2 existing between the Fe alloy melt and the magnesia stabilized zirconia solid electrolyte could be controlled using an electrochemical method of an external dir…
Copper oxide nanowires (NWs) were prepared grown by thermal oxidation of metallic Cu thin layer deposited by RF sputtering on various substrates. A strong relation between oxidation parameters and morphology has been detected, and thus optimal growth parameters were found. The preliminary response of this alternative…
Unusual mesomorphic behaviour has been found in a series of rod-like liquid crystalline (LC) compounds with two chiral centres in the molecular chain. A re-entrant paraelectric SmA* (SmA*RE) phase has been discovered below the ferroelectric SmC* phase on cooling for one homologue. So far this compound is the only one…
The electrical conductivity, Seebeck coefficient, and thermal chemical expansion properties of La 2 NiO 4+δ were measured as a function of temperature and oxygen partial pressure (pO 2 ). The electronic conductivity was analyzed in relation to the thermoelectric power (thermopower) data to elucidate the positive devia…