You're right to be concerned. Material innovators should be open about these things. Copper is toxic, but at these levels shouldnt be a concern. Nano stuff ar

You're right to be concerned. Material innovators should be open about these things. Copper is toxic, but at these levels shouldnt be a concern. Nano stuff are nasty, but since copper in the body cannot last long (corrosive environment), the nano particles will quickly disappear. This is likely to be far more benign than other nano materials. The question is, will this survive outside a lab?