Universität zu Köln

Wagner, Christian ORCID: 0000-0002-2117-6289, Green, Matthew. F. B., Maiworm, Michael, Leinen, Philipp ORCID: 0000-0002-9900-2107, Esat, Taner ORCID: 0000-0003-1094-3718, Ferri, Nicola, Friedrich, Niklas ORCID: 0000-0001-5353-5680, Findeisen, Rolf ORCID: 0000-0002-9112-5946, Tkatchenko, Alexandre ORCID: 0000-0002-1012-4854, Temirov, Ruslan and Tautz, F. Stefan (2019). Quantitative imaging of electric surface potentials with single-atom sensitivity. Nat. Mater., 18 (8). S. 853 - 861. LONDON: NATURE PUBLISHING GROUP. ISSN 1476-4660

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Abstract

Because materials consist of positive nuclei and negative electrons, electric potentials are omnipresent at the atomic scale. However, due to the long range of the Coulomb interaction, large-scale structures completely outshine small ones. This makes the isolation and quantification of the electric potentials that originate from nanoscale objects such as atoms or molecules very challenging. Here we report a non-contact scanning probe technique that addresses this challenge. It exploits a quantum dot sensor and the joint electrostatic screening by tip and surface, thus enabling quantitative surface potential imaging across all relevant length scales down to single atoms. We apply the technique to the characterization of a nanostructured surface, thereby extracting workfunction changes and dipole moments for important reference systems. This authenticates the method as a versatile tool to study the building blocks of materials and devices down to the atomic scale.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Wagner, Christian UNSPECIFIED orcid.org/0000-0002-2117-6289 UNSPECIFIED Green, Matthew. F. B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Maiworm, Michael UNSPECIFIED UNSPECIFIED UNSPECIFIED Leinen, Philipp UNSPECIFIED orcid.org/0000-0002-9900-2107 UNSPECIFIED Esat, Taner UNSPECIFIED orcid.org/0000-0003-1094-3718 UNSPECIFIED Ferri, Nicola UNSPECIFIED UNSPECIFIED UNSPECIFIED Friedrich, Niklas UNSPECIFIED orcid.org/0000-0001-5353-5680 UNSPECIFIED Findeisen, Rolf UNSPECIFIED orcid.org/0000-0002-9112-5946 UNSPECIFIED Tkatchenko, Alexandre UNSPECIFIED orcid.org/0000-0002-1012-4854 UNSPECIFIED Temirov, Ruslan UNSPECIFIED UNSPECIFIED UNSPECIFIED Tautz, F. Stefan UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-134130
DOI:	10.1038/s41563-019-0382-8
Journal or Publication Title:	Nat. Mater.
Volume:	18
Number:	8
Page Range:	S. 853 - 861
Date:	2019
Publisher:	NATURE PUBLISHING GROUP
Place of Publication:	LONDON
ISSN:	1476-4660
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PROBE FORCE MICROSCOPY; INTERFACE; PTCDA; MOLECULES; FIELD; AG Multiple languages Chemistry, Physical; Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13413