I am aware of nanotechnology being tested for regenerative growth (eg nervous system) so it is possible that it can be weaponized. One of the downsides is the toxicity at increased dosage.
In Vivo testing of biocompatibility is a critical step in regeneration approaches. Graphene nanomaterials can be biocompatible or have toxic effects on cells, depending on their chemistry (synthesis, functionalization, surface charges), doses, lateral size, purity, and hydrophilicity. In Vitro evaluation of toxicity required the involvement of macrophages, epithelial or endothelial cells, blood cells, or tumor cells[1].
GO, for example, has been reported to exert toxicity effects towards different human cell lines, including fibroblasts, hepatocarcinoma, skin keratinocytes [104,105,106,107]. However, these effects are strictly related to doses. Studies on human fibroblast cells showed that cytotoxicity and apoptosis induction has been reported at doses >50 μg/mL, while no toxic effects were observed at concentrations <20 μg/mL [104].
I am aware of nanotechnology being tested for regenerative growth (eg nervous system) so it is possible that it can be weaponized. One of the downsides is the toxicity at increased dosage.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8657785/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3212228/