TY  - JOUR
AU  - Wagner, Christian
AU  - Green, Matthew. F. B.
AU  - Maiworm, Michael
AU  - Leinen, Philipp
AU  - Esat, Taner
AU  - Ferri, Nicola
AU  - Friedrich, Niklas
AU  - Findeisen, Rolf
AU  - Tkatchenko, Alexandre
AU  - Temirov, Ruslan
AU  - Tautz, F. Stefan
TI  - Quantitative imaging of electric surface potentials with single-atom sensitivity
JO  - Nature materials
VL  - 18
SN  - 1476-4660
CY  - Basingstoke
PB  - Nature Publishing Group
M1  - FZJ-2019-03562
SP  - 853–859
PY  - 2019
N1  - ERC-StG 757634 CM3
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:31182779
UR  - <Go to ISI:>//WOS:000476651600019
DO  - DOI:10.1038/s41563-019-0382-8
UR  - https://juser.fz-juelich.de/record/863513
ER  -