While the field of nanotechnology is growing and making key advances, we should recognize that biological systems are highly advanced when it comes to operating at the tiniest scale.
"Engineering new materials through assembly of complex, but tiny, components is difficult for scientists. However, nature has become adept at engineering nanoscale building blocks, e.g. proteins and RNA. These are able to form dynamic and efficient nanomachines such as the cell's protein assembly machine (the ribosome) and minute motors used for swimming by bacteria."
