Extended Investigations on Luminescent Cs2[Mo6Br14]@SiO2 Nanoparticles: Physico-Structural Characterizations and Toxicity Studies

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• 作者：Tangi Aubert ; Francisco Cabello-Hurtado ; Marie-Andr茅e Esnault ; Chrystelle Neaime ; Dominique Lebret-Chauvel ; Sylvie Jeanne ; Pascal Pellen ; Claire Roiland ; Laurent Le Polles ; Noriko Saito ; Koji Kimoto ; Hajime Haneda ; Naoki Ohashi ; Fabien Grasset ; St茅phane Cordier
• 刊名：Journal of Physical Chemistry C
• 出版年：2013
• 出版时间：October 3, 2013
• 年：2013
• 卷：117
• 期：39
• 页码：20154-20163
• 全文大小：476K
• 年卷期：v.117,no.39(October 3, 2013)
• ISSN：1932-7455

文摘

Functional silica nanoparticles and in particular luminescent silica nanoparticles constitute very promising candidates for many applications in the field of biotechnology, theranostics, and photonics. However, optimizing the design of such materials requires a deep understanding of their physicochemical properties. In this article are reported extended investigations on luminescent Cs₂[Mo₆Br₁₄]@SiO₂ nanoparticles prepared by a water-in-oil microemulsion technique. We bring here new insights into the structure of such nanoparticles and its interplay with their optical properties. The structural interactions between the cluster units and the silica matrix were investigated and are discussed in details on the basis of FE-SEM, HAADF-STEM, ICP-OES, BET, ²⁹Si MAS NMR, and photoluminescence studies. As part of the risk evaluation before potential applications, the toxicity of the nanoparticles both on plants and on human cells was evaluated.