Synthesis and optical properties of MPTMS-capped CdS quantum dots embedded in TiO2 thin films for photonic applications |
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| Institution: | 1. Laboratoire de Spectrochimie Infrarouge et Raman (CNRS, UMR 8516) Bât C5, Centre d’Etudes et de Recherches Lasers et Applications (CERLA-FR CNRS 2416), Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq, France;2. Laboratoire de Physique des Lasers, Atomes et Molécules (CNRS, UMR 8523) Bât P5, Centre d’Etudes et de Recherches Lasers et Applications (CERLA-FR CNRS 2416) Université des Sciences et Technologies de Lille, 59655 Villeneuve d’Ascq, France;3. Dipartimento di Ingegneria Meccanica, settore Materiali, Università di Padova, via Marzolo 9, 35131 Padova, Italy |
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| Abstract: | CdS nanoparticles have been prepared via a colloidal route using 3-mercatopropyltrimethoxysilane as a capping agent. The stability of the particles in solution and embedded in TiO2 matrices has been followed by optical absorption. Both the size and the size distribution of the particles are well controlled, thus allowing a tunable emission. Raman and photoluminescence spectroscopies have been used to characterize colloidal CdS, TiO2:CdS solutions and thin films deposited on soda-lime slides. The Z-scan technique has been used to measure the non-linear refractive indices of the solutions and the non-linear absorption coefficients of the thin films. |
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