Jump to main content
Jump to site search

Issue 5, 2020
Previous Article Next Article

High resolution noncontact atomic force microscopy imaging with oxygen-terminated copper tips at 78 K

Author affiliations

Abstract

Functionalizing atomic force microscopy (AFM) tips by picking up single inert probe particles like CO or Xe from the surface drastically increase the resolution. In particular, this approach allows imaging organic molecules with submolecular resolution revealing their internal bonding structure. However, due to the weak coupling of these probe particles to both, the surface they are picked up from and the tip apex, these experiments require liquid helium temperatures (i.e. ≈5 K). In the present study we demonstrate that functionalizing an AFM tip with an atomically defined O-terminated copper tip (CuOx tip) allows performing such experiments at liquid nitrogen temperatures (i.e. ≈78 K) with outstanding quality. We show that it is possible to utilize CuOx tips for chemically selective imaging of a copper oxide nanodomain on a partially oxidized Cu(110) surface in the repulsive force regime at elevated temperatures. Moreover, the high structural and chemical stability of CuOx tips allow even ex situ investigations where these tips are used to perform experiments on other, non-Cu, non-oxidized, substrates. In particular, we present results obtained from a dicoronylene (DCLN) molecule with submolecular resolution. An analysis of inner and peripheral bond lengths of the DCLN molecule shows excellent agreement with theoretical gas phase simulations emphasizing the exceptional imaging properties of CuOx tips also at elevated temperatures.

Graphical abstract: High resolution noncontact atomic force microscopy imaging with oxygen-terminated copper tips at 78 K

Back to tab navigation

Supplementary files

Article information


Submitted
10 Dec 2019
Accepted
14 Jan 2020
First published
15 Jan 2020

Nanoscale, 2020,12, 2961-2965
Article type
Communication

High resolution noncontact atomic force microscopy imaging with oxygen-terminated copper tips at 78 K

D. Yesilpinar, B. Schulze Lammers, A. Timmer, S. Amirjalayer, H. Fuchs and H. Mönig, Nanoscale, 2020, 12, 2961
DOI: 10.1039/C9NR10450J

Social activity

Search articles by author

Spotlight

Advertisements