Quantum dots of cadmium sulfide in thin glass films prepared by sol—gel technique

Silica nano-rings and nano-hollows: Preparation and UV photoluminescence emission

“…The tunable optical properties of ring-shaped materials can also be achieved by varying the diameter and thickness of the ring [4] and by patterned structures of NRs and NHs [5]. On the other hand, filling the NHs with functional materials, quantum confined structures and their associated quantized effects may be demonstrated in a variety of host structures such as plastics and glasses [6][7][8]. The fabrication of meso-and nano-porous silica has been extensively investigated, since porous silica is one of promising materials for the development of new optical sensors and luminescent devices [9,10], in addition to an ideal host material for the study of chemical and physical behavior of confined molecules [11,12].…”

Sol-gel glass waveguides

“…A similar approach has been followed by Minti et al [41] in the preparation of CdS-doped films. In this case, a solution of tetramethoxysilane (TMOS), TEOS and cadmium nitrate is prepared; afterwards, the porous film is again exposed to H2S for a few minutes in order to form CdS microcrystals.…”

Interfacially formed organized planar inorganic, polymeric and composite nanostructures

“…Many chemical techniques are currently exploited for preparing inorganic nanoparticles, in particularly, sol-gel method [188][189][190], bulk phase redox synthesis of metallic nanoparticles in aqueous solution [191], bulk phase synthesis of quantum-dot size semiconductor nanocrystals [16,192,193], normal/reverse micelle method [194][195][196][197][198], double emulsion [199], Langmuir monolayer templating [200,201], synthesis in protein channels in Langmuir monolayer [202], in multilayer LB films [203][204][205][206][207], in porous membranes [208], two-phase liquid-liquid systems [209,210] were exploited to prepare metallic and semiconducting nanoparticles. When inorganic nanoparticles were generated at the gas-liquid interfaces with surfactant Langmuir monolayer used as a template, the initial reagents were located in a gas and/or liquid bulk phases and the inorganic phase growth process was predominantly of the three-dimensional character [201,211,212].…”