Abstract
A new scattering medium for random laser has been introduced. This random laser is composed of TiO2@Silica nanoparticles suspended in an ethanol solution of rhodamine 6G. TiO2 nanoparticles with average diameter of 0.41 μm were coated with a silica shell of ~40 nm thickness. Random laser study comparing TiO2 and TiO2@Silica suspensions was performed. The study showed a higher performance for TiO2@Silica system. This fact was attributed to an increase of the scattering strength (TiO2@Silica) due to a better colloidal stability and light-coupling enhancement with TiO2 scatter cores. Optical and chemical stability has been combined by coating TiO2 nanoparticles with a silica shell of ~40 nm thickness.
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Acknowledgments
We gratefully acknowledge financial support from Rede 36 Nanobiotec CAPES (Brazil). V.M. thanks the CAPES (Brazil) for doctoral fellowships.
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Jimenez-Villar, E., Mestre, V., De Sá, G.F. (2016). High Performance in Random Laser Using a Colloidal Suspension of TiO2@Silica Nanoparticles. In: Ribeiro, P., Raposo, M. (eds) Photoptics 2014. Springer Proceedings in Physics, vol 177. Springer, Cham. https://doi.org/10.1007/978-3-319-27321-1_4
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DOI: https://doi.org/10.1007/978-3-319-27321-1_4
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