Before revision: DPN is the nanotechnology analog of the dip pen (also called the quill pen), where the tip of an atomic force microscope cantilever acts as a "pen , " which is coated with a chemical compound or mixture acting as an "ink , " and put in contact with a substrate, the "paper .
After revision: DPN is the nanotechnology analog of the dip pen (also called the quill pen) where the tip of an atomic force microscope cantilever acts as a "pen " which is coated with a chemical compound or mixture acting as an "ink , " and put in contact with a substrate, the "paper ,,