Imagine that you are about to fix up dinner and want to make sure the area is clean. Take a specially designed napkin that has been mixed with nanofibers. These super-nanos are sensitive to a specific substance. In this case, (in preparation for food), the napkin is looking for e-coli. Wipe the table with the napkin and if the nasty germs are on the preparation area the nanofibers will change color. This alerts you to blowtorch the affected area. Well, some disinfectant will probably do the job.
Written by Cecilia