A porous hybrid of titanate nanosheets with SnO(2) nanoparticles has been realized by an exfoliation and reassembling route. The present nanohybrid shows a large reversible capacity of 860 mA h g(-1) with a good capacity retention (about 60% retention of the initial capacity after 50 cycles).

The functional properties of two types of barium strontium titanate ~BST! thin film capacitor structures were studied: one set of structures was made using pulsed-laser deposition ~PLD! and the other using chemical solution deposition. While initial observations on PLD films looking at the behavior of Tm ~the temperature at which the maximum dielectric constant was observed! and Tc* ~from Curie...

of thermal strains M. B. Okatan, M. W. Cole, and S. P. Alpay Materials Science and Engineering Program, Department of Chemical, Materials, and Biomolecular Engineering, University of Connecticut, Connecticut 06269, USA Institute of Material Science, University of Connecticut, Connecticut 06269, USA U. S. Army Research Laboratory, Weapons and Materials Research Directorate, Aberdeen Proving Grou...

Ba0.5Sr0.5TiO3 ~BST! thin films grown on Si by an in situ ultraviolet-assisted pulsed laser deposition ~UVPLD! technique exhibited significantly higher dielectric constant and refractive index values and lower leakage current densities than films grown by conventional PLD under similar conditions. X-ray photoelectron spectroscopy ~XPS! investigations have shown that the surface layer of the gro...

We developed a method for production of arrays of platinum nanocrystals of controlled size and shape using templates from ordered silica bead monolayers. Silica beads with nominal sizes of 150 and 450 nm were self-assembled into monolayers over strontium titanate single crystal substrates. The monolayers were used as shadow masks for platinum metal deposition on the substrate using the three-st...

A method is proposed for the determination of barium and strontium peroxides (active oxygen) in igniters in small-arms tracer ammunition. The sample is treated with dilute hydrochloric acid (1 + 9) which dissolves the magnesium powder almost instantaneously and then dissolves the barium or strontium peroxides within 10-30 min. The solution is then filtered to remove the organic substances (calc...

Strontium Titanate SrTiO3 (STO) is known to undergo an antiferrodistortive transition from cubic to tetragonal phase at Tc ≈ 105K, and classical to quantum paraelectric phase transition at Tq ≈ 37K. This paper is intended to use Landau Theory to explore these two phase transitions of STO, as well as some experimental techniques to examine this model.