Quinine doped hybrid sol–gel coatings for wave guiding and optical applications

Abstract

Pure and quinine doped silica coatings have been prepared over sodalime glasses. The coatings were consolidated at low temperature (range 60-180 °C) preserving optical activity of quinine molecule. We designed a device to test the guiding properties of the coatings. We confirmed with this device that light injected in pure silica coatings is guided over distances of meters while quinine presence induces isotropic photoluminescence. With the combined use of both type of coatings, it is possible to design light guiding devices and illuminate regions in glass elements without electronic circuits.

Partially embedded gold nanoislands in a glass substrate for SERS applications

“…[11][12][13][14] Different methods were used to synthesize metallic nanostructures in glass, for example, ion exchange, 15,16 direct ion implantation, 17 and solgel methods. 18 In this work, partially embedded gold nanoislands in glass were investigated as SERS-active substrates. Gold nanoislands can be formed, partially embedded, and tuned in glass by thermal annealing.…”

Effective Air‐Spray Deposition of Thin Films Obtained by Sol–Gel Process onto Complex Pieces of Sanitary Ware

“…Therefore, to obtain a dense silica matrix without organic residues, it is first necessary to study the influence of the sintering temperature on the structural behavior. The silica matrix is formed at 370°C, temperatures as high as 500°C are required to completely remove the residual organic components. However, if the dwell time at lower temperatures increases, the reaction is kinetically favored.…”

“…This versatility provides great amount of applications in the nanotechnology field, such as solar cells, electronics, biomedical sensors, or magnetic coatings . Nevertheless, its greatest use is in anticorrosion coatings and in optical devices . There is a lot of deposition techniques to obtain thin films such as highlighting thermal evaporation under vacuum, sputtering, molecular beam epitaxy (MBE), physical or chemical vapor deposition (PVD, CVD), and electrophoretic deposition (EPD).…”

“…6 Nevertheless, its greatest use is in anticorrosion coatings and in optical devices. [7][8][9] There is a lot of deposition techniques to obtain thin films such as highlighting thermal evaporation under vacuum, sputtering, molecular beam epitaxy (MBE), physical or chemical vapor deposition (PVD, CVD), and electrophoretic deposition (EPD). Particularly to deposit silica-like thin films, it is used plasma-enhanced chemical vapor deposition (PECVD) of hexamethyl disiloxane or tetramethyl disiloxane/oxygen mixtures.…”