The Electric Field of CO Tips and Its Relevance for Atomic Force Microscopy Ellner, Michael ; Pavliček, Niko ; Pou, Pablo ; Schuler, Bruno ; Moll, Nikolaj ; Meyer, Gerhard ; Gross, Leo ; Peréz, Rubén Abstract Publication: Nano Letters Pub Date: March 2016 DOI: 10.1021/acs.nanolett.5b05251 Bibcode: 2016NanoL..16.1974E