While many previous studies have investigated the behavior of simple metal oxides, emerging technologies such as energy storage are utilizing more complex and multi-component metal oxides consisting of layered structures and redox-active metals.  The widespread use of such materials increases the potential for unintentional release and therefore, analyzing their interaction with biological systems is of the utmost importance.  We are using LiCoO2 as a model system for assessing the potential environmental impact of technologically relevant nanomaterials for energy storage.  LiCoO2 is a redox-active material that is being utilized in cathodes of Li-ion batteries.  We have synthesized LiCoO2 nanoparticles via a flux-based method to yield plate-like structures under 50 nm in diameter and several atomic layers in width.  The impact of these particles on model organisms was investigated.  Specifically, respirometry was used to investigate bacterial growth rates for Shewanella oneidensis, a single cell model system.  These studies reveal dose-dependent inhibition of bacterial growth and recovery from initial inhibitory effects of LiCoO2 nanoparticles based on the degree of particle aggregation.  Additionally, acute response experiments to LiCoO2 nanoparticles were also completed with Daphnia magna as a multicellular organism model for comparison.

Investigation of the impact of LiCoO<sub>2</sub> nanoparticles on model organisms Shewanella oneidensis and Daphnia magna

248th National Meeting (2014)

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Investigation of the impact of LiCoO2 nanoparticles on model organisms Shewanella oneidensis and Daphnia magna

Investigation of the impact of LiCoO₂ nanoparticles on model organisms Shewanella oneidensis and Daphnia magna