Now showing items 1-10 of 24
Photopatterning hybrid sol–gel glass materials prepared from ethylene tellurate and alkoxysilane
(Elsevier: Journal of Non-Crystalline Solids, 2005-09-01)
Photopatterning of sol–gels is a versatile technique that has been used to prepare optical components and devices of silica and titania. Telluria (TeO2) has a higher third-order non-linearity than silica and titania and ...
Modulation of refractive index in polymer composites: toward a synthetic bio-optic lens
(SPIE: Proceedings of SPIE, 2003-07)
As an option in the creation of a synthetic bio-optic lens, we propose that spatial modulation of refractive index can be realized in polymer composites containing a colloidal ionophoric phase. The variation of refractive ...
Adsorption of a polymeric siloxane surfactant on carbon black particles dispersed in mixtures of water with polar organic solvents
(Elsevier: Journal of Colloid and Interface Science, 2002-11-01)
The adsorption of a rake-type polymeric siloxane surfactant (polydimethylsiloxane-graft-polyether copolymer) on carbon black (CB) particles dispersed in mixtures of water with polar organic solvents (ethanol, formamide, ...
Colloidal particles derived from a complex of phosphotungstic acid and ethoxylated surfactants
(Elsevier: Journal of Colloid and Interface Science, 2002-09)
Stable, colloidal sols of submicron size were prepared by titration of aqueous solutions of alkylene oxide surfactants with phosphotungstic acid, H3PW12O40 (PTA), followed by neutralization with ammonium or potassium ...
Dielectric spectroscopy of polystyrene/poly(ethylene oxide) composites
(American Chemical Society: Macromolecules, 1996-07-01)
The effect of incorporating poly[styrene-b-(ethylene oxide)], PS-b-PEO into PS/PEO composites has been examined microscopically and dielectrically. The addition of block copolymer stabilizes the dispersion of PEO in PS and ...
Effect of crystallization on the morphologies of block copolymer/homopolymer blends cast in an electric field
(Wiley: Journal of Polymer Science Part B: Polymer Physics, 1996-01-30)
Blends of polystyrene (PS) and poly(styrene-b-ethylene oxide) (PS-b-PEO) were cast from a ternary solvent mixture containing 85% toluene, 10% tetrahydrofuran, and 5% methanol under conditions that favor crystallization of ...
Swelling of copolymer micelles by added homopolymer
(American Chemical Society: Macromolecules, 1994-08-15)
We present a simple theory and a supporting experimental study of the extent to which block copolymer micelles in a homopolymer matrix can be swollen by relatively low molecular weight homopolymer which is compatible with ...
Extracellular volume and transsarcolemmal proton movement during ischemia and reperfusion: a 31P NMR spectroscopic study of the isovolumic rat heart
(Wiley: NMR in Biomedicine, 1993-07)
We have measured, directly and simultaneously, changes in extracellular volume and intra- and extracellular pH during ischemia in the isolated rat heart using 31P NMR spectroscopy. Hearts were perfused with buffer containing ...
Electric field-induced morphologies in diblock copolymer containing polymer blends
(American Chemical Society: Polymer Preprints, 1992-04)
Column-like structures can be generated in dc electric fields from normally spherical domain-forming binary and ternary blends. In ternary PS/PS-b-PEO-PEO blends, the addition of block copolymer stabilizes the elongated ...
Effect of block copolymer on the electric field induced morphology of polymer blends
(American Chemical Society: Macromolecules, 1991-12-23)