Could you list some Ethical drawbacks of nanotechnology?

Nanotechnology raises several ethical concerns, including issues of safety and long-term health effects, as the impacts of nanoparticles on human health and the environment are still not fully understood. There are also worries about privacy, as nanoscale devices could enable invasive surveillance. Additionally, the potential for unequal access to nanotechnology could exacerbate social inequalities, as those with less access may be left behind in advancements. Lastly, the dual-use nature of nanotechnology raises ethical questions about its potential applications in warfare or surveillance.