Published in

Nature Research, Nature Communications, 1(7), 2016

DOI: 10.1038/ncomms11560

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Mapping the electrostatic force field of single molecules from high-resolution scanning probe images

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractHow electronic charge is distributed over a molecule determines to a large extent its chemical properties. Here, we demonstrate how the electrostatic force field, originating from the inhomogeneous charge distribution in a molecule, can be measured with submolecular resolution. We exploit the fact that distortions typically observed in high-resolution atomic force microscopy images are for a significant part caused by the electrostatic force acting between charges of the tip and the molecule of interest. By finding a geometrical transformation between two high-resolution AFM images acquired with two different tips, the electrostatic force field or potential over individual molecules and self-assemblies thereof can be reconstructed with submolecular resolution.