Researchers are applying various strategies to designing
nanoscale propulsion systems by either using or copying
biological systems such as the flagellar motors of bacteria or
by employing various chemical reactions. Different practical
micromotor applications, ranging from drug delivery, to target
isolation and environmental remediation, have thus been reported
over the past 2-3 years. Yet, there are no reports on a
nanomachine-based toxicity assay approach, analogous to the use
of live aquatic organisms for testing the quality of our water
resources. Naturally occurring nanomaterials can be found
everywhere in nature - in soil, ground and surface waters,
volcanic ash, ocean spray, mineral composites, smoke. Biogenic
magnetite nanoparticles have even been discovered in various
organisms, ranging from bacteria to human brains, with various
biological functions. Researchers have discovered that
nanoparticles produced by a flesh-eating fungus hold promise for
stimulating the immune system and killing tumors. Na