Effects on the worms' growth size

The body area of living worms was measured using a logarithm and the values are reported in Figure 3. Theblue-lined curves show the increasing body area of non-treated nematodes. Dueto their natural sinusoidal movement allowed by muscular contraction and thelack of space inside the microfluidic chambers the body size shrinks after 70 hours. After treatment with MAPbI3 at 50(orange line) the worms’ body size reaches a plateau at the same time point ascontrol however it has a smaller area. This observation is even more strikingwith the curve profile of worms exposed to 100 ug/ml (green line) and to200 ug/ml (red line) of MAPbI3. On the other hand exposure of nematodes to MASnI3 resulted in a much stunning body size freezing (Figure 3 bottompanels). In addition the area values reached a plateau earlier thannon-treated samples and this effect was dose-dependent. From these observations we assumed that perovskites preventthe larvae to reach the young adult stage. Therefore we ought to verify if thedecrease in the worms’ size is due to an affected development by tracking theyoung adults and quantifying the time-lapse when they developed.