There is no such thing as molecules in steel. Steel is a crystaline structure of iron atoms with differing amounts of alloying elements.
As journeyman stated, there are many other factors involved with making a sharp knife. I shave with a straight razor, it it is extremely sharp (12000 grit stone and stropped) and it cuts whiskers great. However it is almost completely useless in cutting other things because the edge is so thin it would be damaged. something a few atoms thick would be completely useless as a knife.
Last edited by pike3e; 11/13/12.
