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A novel femtosecond-laser formation of CdS nanocrystallites in zirconia matrices |
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| Authors: | Katarzyna Raulin Odile Cristini-Robbe Patrice Baldeck Olivier Stéphan Christophe Kinowski Sylvia Turrell Bruno Capoen and Mohamed Bouazaoui |
| Institution: | 1.Laboratoire de Spectrochimie Infrarouge et Raman (CNRS, UMR 8516), Bat. C-5, Centre d’Etudes et de Recherches Lasers et Applications (CERLA-FR CNRS 2416),Université des Sciences et Technologies de Lille,Villeneuve d’Ascq,France;2.Laboratoire de Physique des Lasers, Atomes et Molécules (CNRS, UMR 8523), Bat. P-5, Centre d’Etudes et de Recherches Lasers et Applications (CERLA-FR CNRS 2416),Université des Sciences et Technologies de Lille,Villeneuve d’Ascq,France;3.Laboratoire de Spectrométrie Physique (CNRS, UMR 5588),Université Joseph-Fourier-CNRS,Saint-Martin-d’Hères,France |
| Abstract: | A novel method for direct laser writing of two-dimensional cadmium sulfide (CdS) semiconductor nanoparticle microstructures is reported. A two photon or a higher-order multiphoton absorption process, originating from femtosecond laser pulses, was used to decompose CdS precursors dispersed in a zirconia thin film previously dip-coated on a glass substrate. The kinetics of nanoparticle formation as a function of laser power were monitored in situ by photoluminescence spectroscopy. Raman spectroscopy was also performed to characterize the structural changes of the zirconia matrix under irradiation and to verify the formation of CdS nanoparticles. Results show that CdS nanoparticles were formed by two-photon absorption (TPA) with or without the help of an additional carbazole photoinitiator. |
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