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. 2016 Feb 24;6:21701. doi: 10.1038/srep21701

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Optical image of CaCO₃ Janus particles and fluorescent latex reference particles in presence of conditioned media (a) at time 0 and after 30 minutes (reference particles highlighted in green), and in presence of non-buffered media (b) at time 0 and after 30 minutes. Schematic of the IBIDI chip, depicting CaCO₃ Janus particles and reference particles in the middle channel, which are also dispersed in the chamber filled up with conditioned media (a) and the chamber filled up with non-buffered media (b). Scale bar, 20 μm.