Your finger can feel the change of a single atom in a material

A swap of a single atom can change how a smooth surface feels

Ralf Hiemisch/Getty Images/fStop

The human fingertip can distinguish between materials that have minuscule chemical differences – even a substitution as small as a single atom.

Generally, what we feel with our fingers are physical bumps in a material’s surface structure. Charles Dhong at the University of Delaware and his colleagues set out to find whether it would be possible to feel a chemical difference in which the internal molecular structures of two materials slightly vary but their surfaces are equally smooth.

They did this by taking a …



Click here to view the original article.

Related Posts