Has anyone worked with piezoelectric materials before? Currently starting research work with them and totally new to these materials... I'm currently looking to buy CHEAP *non-toxic* piezoelectric PVDF and ceramics. Goodfellow seems to have PVDF, but paradoxically the website says it's a toxic irritant. For some reason I seem to recall that PVDF is naturally nontoxic. Anyways, for the PVDF polymer, I'm preferably looking for cheap films that can eventually be incorporated into a sensor. For the ceramics, not sure how this will work but is it possible to buy raw ceramics and make it into an actuator yourself? Has anyone tried this before, any tips/insight? Would really appreciate it if anyone could suggest any websites that sell this stuff <$100? Even better if you think they would offer free samples. Thanks so much in advance!