A “Molecular Eraser” for Dip‐Pen Nanolithography

The DPN eraser: Dip-pen-nanolithography- (DPN-) generated nanostructures can be repaired using a conductive atomic force microscope (AFM) and an adsorbate-coated AFM tip. This molecule-based erasing technique was used to transform a pattern of MHA in the form of the letters “DRN” into “DPN” (see figure). The technique facilitates removal and subsequent backfilling with a second molecule type.