1,721,432 research outputs found
Physico-chemical properties of PEG-based inorganic hybrids
Get PDFOrganic-inorganic composites can be conveniently obtained by sol-gel recipes as class-I or class-II hybrids. They can find interesting applications in several fields, including drug delivery, scaffolding, bio-sensing, energetics, etc. In this paper we reconsider and reinvestigate our previous work in the field, by considering the sol-gel synthesis and physico-chemical characterization of class-I hybrids, and by trying to highlight some unifying elements that can be of help for the development of more efficient and precise synthesis methods. In particular, we will discuss systems based on poly(ethylene glycol) with SiO2 (1) and ZrO2 (2) as the ceramic phase. Emphasis will be put on the role played by solid-state NMR spectroscopy in unveiling the interactions at the base of hybrid formation.
(1) Catauro, M., Bollino, F., Papale, F., Ferrara, C., Mustarelli, P., Silica-polyethylene glycol hybrids synthesized by sol-gel: Biocompatibility improvement of titanium implants by coating, Materials Science and Engineering C, 2015, 55, 5451.
(2) Catauro, M., Bollino, F., Papale, F., Pacifico, S., Galasso, S., Ferrara, C., Mustarelli, P. Synthesis of zirconia/polyethylene glycol hybrid materials by sol-gel processing and connections between structure and release kinetic of indomethacin, Drug Delivery, 2014, 21, 595-604
Improving Oxygen Transport in Perovskite-Type LaGaO3Solid Electrolyte through Strain
No full textLattice strain is a promising possibility to improve materials performance in view of their application in thin-film devices. In particular, defect and transport properties in ionic conductors may be tailored through strain effects, since defect formation energy and migration barriers are correlated to structural parameters which, in turn, are influenced by strain-induced deformations. In this computational study we predicted that oxide-ion diffusion in perovskite-type lanthanum gallate can be improved through application of tensile strain. The structural deformations required to accommodate tensile lattice strain in the perovskite system are shown to result in a preferential localization of the oxygen vacancies in the equatorial plane of the GaO6 octahedra, while oxide-ion diffusion becomes anisotropic
Electrolytes for solid-state lithium rechargeable batteries: recent advances and perspectives
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