Scientists have successfully used directed evolution, a protein-engineering method, to build nanoparticles for biosensors, used widely in biology, drug development, and even medical diagnostics such as real-time monitoring of glucose.

See the source article by following the link below:
Scientists have successfully used directed evolution, a protein-engineering method, to build nanoparticles for biosensors, used widely in biology, drug development, and even medical diagnostics such as real-time monitoring of glucose.