Experiments on the uptake of gold nanoparticles by cells grown in different cell culture configurations suggest that the influence of sedimentation should be taken into account when performing in vitro studies.
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Lison, D., Huaux, F. Ups and downs of cellular uptake. Nature Nanotech 6, 332–333 (2011). https://doi.org/10.1038/nnano.2011.81
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DOI: https://doi.org/10.1038/nnano.2011.81