AEven though it is a million times thinner than a hair, it is possible to “feel” with your fingers a substitution of a single atom in a , attests to a study published in by researchers at the University of Delaware. Of course, we will not discern the difference by the “relief” of the atom itself but because the chemical composition of the material affects the .
Researchers tested several compounds applied in a thin layer of a singlethick on a plate . Of the six pairs of compounds tested, human testers were able to distinguish three, including one where a single atom of was replaced by an atom of . « Some testers told us that some surfaces were a little more gritty and others were more velvety., explains Charles Dhong to The way molecules fit together changes the amount of friction ».
Thiscould be used for for the visually impaired or to create , argue the authors. For example to make “feel” velvet or on the screen of a . We can already imagine the potential for clothing e-commerce!