Preparation and Z-Scan nonlinear optical characterization of Au/SiO2- and Ag/SiO2-supported nanoparticles dispersed in silica sonogel films

Morales–Saavedra, Omar G.; Zanella, Rodolfo; Maturano-Rojas, Viridiana; Torres-Zúñiga, V.; Flores-Flores, José O.; Rodrı́guez-Rosales, Antonio A.; Ortega-Martı́nez, R.

doi:10.1007/s10971-012-2793-8

Cited by 7 publications

(1 citation statement)

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“…Under this perspective, we investigate in this work on the optical properties of CdTe-QDs nanocrystals immersed in SiO 2 glassy networks grown via the sonogel route (Flores-Flores & Saniger, 2006;Morales-Saavedra et al, 2007;). Because of the high specific surface areas, uniform nanopore size distribution and appropriate chemical stability, mesoporous sol-gel materials have been recently used as hosting networks for metal and metal oxide nanoparticles (MNPs) which promise potential applications in many technologically important areas (Morales-Saavedra et al, 2012). Apparently, the use of mesoporous oxide structures with high specific surface areas as hosting systems for MNPs can dramatically improve their functionalities such as magnetic, catalytic and optoelectronic activities.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and photophysical studies of CdTe quantum-dots dispersed in SiO2 sonogel optical-glasses

Morales–Saavedra

Gutiérrez-Lazos

Ortega-López

et al. 2015

Journal of Applied Research and Technology

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The catalyst-free sonogel route has been implemented to fabricate highly pure SiO 2 glasses as host materials for CdTe quantum dot nanocrystals synthesized in aqueous solution. Developed CdTe-based inorganic-inorganic hybrid composites exhibited rigid bulk structures with controllable geometrical shapes and dopant concentrations, allowing the control of the optical properties in the solid-state confinement. Comprehensive linear and nonlinear photophysical characterizations were performed according to UV-vis absorbance, Raman and photoluminescent spectroscopies; the linear refractive indices of highly/lowly CdTe-doped samples were also estimated according to the Brewster angle technique. Since the hybrid glasses are amorphous in nature, the cubic nonlinear optical activity of these composites has been tested via the Z-Scan technique. Results show that the CdTe quantum dots were homogeneously embedded within the SiO 2-sonogel matrix with only small guest-host molecular interactions and preserving their strong photoluminescent properties; thus providing advanced solid-state heterostructured nanocomposite materials suitable for current technological photonic applications.

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Section: Introductionmentioning

confidence: 99%