Labex Serenade News and events

New article by Catalano et al. in Colloids and Surfaces A: Physicochemical and Engineering Aspects

Manufactured TiO2 nanoparticles are widely used in cosmetics as UV blockers. The environmental risk associated with these Engineered Nanomaterials (ENMs) strongly depends on their concentration, aggregation state and surface chemistry. Controlling these parameters in the sunscreen formulation is crucial in order to optimize the ENMs content and better understand their fate, transport, and toxicity at the product’s end-of-life. Read More

New article by Eymard-Vernain et al. in Plos One

Due to the physicochemical properties of nanoparticles, the use of nanomaterials increases over time in industrial and medical processes. We herein report the negative impact of nanoparticles, using solid growth conditions mimicking a biofilm, on the ability of Bacillus subtilis to fight against a stress. Read More

New article by Catalano et al. in Nanomaterials

Sunscreens are emulsions of water and oil that contain filters capable of protecting against the detrimental effects of ultraviolet radiation (UV). The widespread use of cosmetic products based on nanoparticulate UV filters has increased concerns regarding their safety and compatibility with both the environment and human health. In the present work, we evaluated the effects of titanium dioxide nanoparticle (TiO2NP)-based UV filters with three different surface coatings on the development and immunity of the sea urchin, Paracentrotus lividus. Read More

New article by Marchioni et al. in Nanoscale Horizons

Silver nanoparticles (AgNPs) are efficient biocides increasingly used in consumer products and medical devices. Their activity is due to their capacity to release bioavailable Ag(I) ions making them long-lasting biocides but AgNPs themselves are usually easily released from the product. Besides, AgNPs are highly sensitive to various chemical environments that triggers their transformation, decreasing their activity. Read More

New article by Châtel et al. in NanoImpact

Production of Manufactured Nanomaterials (MNMs) has increased extensively due to economic interest in the current years. However, this widespread use raises concern about their impact on human and environment. Read More

New article by Torres et al. in Nanomaterials

Synthetic amorphous silica is one of the most used nanomaterials, and numerous toxicological studies have studied its effects. Most of these studies have used an acute exposure mode to investigate the effects immediately after exposure. However, this exposure modality does not allow the investigation of the persistence of the effects, which is a crucial aspect of silica toxicology, as exemplified by crystalline silica. Read More

New article by Slomberg et al. in Royal Society of Chemistry

Short-term, aqueous aging of a commercial nanocomposite TiO2 UV filter with a protective SiO2 shell was examined in abiotic simulated fresh- and seawater. Read More

New article by Marchioni et al. in The Journal of Physical Chemistry

Article on "Thiolate-Capped Silver Nanoparticles: Discerning Direct Grafting from Sulfidation at the Metal-Ligand Interface by Interrogating the Sulfur Atom" by Marchioni, M., Battocchio, C., Joly, Y., Gateau, C., Nappini, S., Pis Read More

PhD position on invertebrate nanotoxicology at Université de Genève

Candidates should hold a Master degree comparable to a Swiss University M.Sc in biology, biochemistry, environmental science or equivalent. The candidate should have a strong interest in scientific research and the aquatic environment. Read More

New article by Auffan et al. in Environmental Science: Nano

Silver nanomaterials with different shapes (spheres, plates, wires, rods, cubes) are valued by industries and scientists for their shape-dependent properties which make them useful for diverse applications. In a safer-by-design perspective, controlling the shape of silver nanomaterials could be an option to increase their properties while lowering either their hazard or their exposure potentials. Read More