Simultaneous measurement of multiple independent atomic-scale interactions using scanning probe microscopy: data interpretation and the effect of cross-talk
Baykara, M. Z.
Schwendemann, T. C.
Altman, E. I.
Schwarz, U. D.
Journal of Physical Chemistry C
American Chemical Society
6670 - 6677
Item Usage Stats
MetadataShow full item record
In high-resolution scanning probe microscopy, it is becoming increasingly common to simultaneously record multiple channels representing different tip-sample interactions to collect complementary information about the sample surface. A popular choice involves simultaneous scanning tunneling microscopy (STM) and noncontact atomic force microscopy (NC-AFM) measurements, which are thought to reflect the chemical and electronic properties of the sample surface. With surface-oxidized Cu(100) as an example, we investigate whether atomic-scale information on chemical interactions can be reliably extracted from frequency shift maps obtained while using the tunneling current as the feedback parameter. Ab initio calculations of interaction forces between specific tip apexes and the surface are utilized to compare experiments with theoretical expectations. The examination reveals that constant-current operation may induce a noticeable influence of topography-feedback-induced cross-talk on the frequency shift data, resulting in misleading interpretations of local chemical interactions on the surface. Consequently, the need to apply methods such as 3D-AFM is emphasized when accurate conclusions about both the local charge density near the Fermi level, as provided by the STM channel, and the site-specific strength of tip-sample interactions (NC-AFM channel) are desired. We conclude by generalizing to the case where multiple atomic-scale interactions are being probed while only one of them is kept constant.
KeywordsAtomic force microscopy
Frequency shift keying
Scanning probe microscopy
Ab initio calculations
Constant current operations
High resolution scanning
Noncontact atomic force microscopy
Scanning tunneling microscopy
Published Version (Please cite this version)http://dx.doi.org/10.1021/acs.jpcc.5b00594
Showing items related by title, author, creator and subject.
Surface evolution of 4H-SiC(0001) during in-situ surface preparation and its influence on graphene properties Ul Hassan J.; Meyer, A.; Çakmakyapan, Semih; Kazar, Özgür; Flege J.I.; Falta J.; Özbay, Ekmel; Janzén, E. (Trans Tech Publications, Switzerland, 2013)The evolution of SiC surface morphology during graphene growth process has been studied through the comparison of substrate surface step structure after in-situ etching and graphene growth in vacuum. Influence of in-situ ...
The formation and characterization of cyclodextrin functionalized polystyrene nanofibers produced by electrospinning Uyar T.; Havelund, R.; Hacaloglu J.; Zhou X.; Besenbacher F.; Kingshott P. (2009)Polystyrene (PS) nanofibers containing the inclusion complex forming beta-cyclodextrin (β-CD) were successfully produced by electrospinning aimed at developing functional fibrous nanowebs. By optimization of the electrospinning ...
Structural superlubricity of platinum on graphite under ambient conditions: the effects of chemistry and geometry Özoǧul, A.; Ipek, S.; Durgun, E.; Baykara, M. Z. (American Institute of Physics Inc., 2017)An investigation of the frictional behavior of platinum nanoparticles laterally manipulated on graphite has been conducted to answer the question of whether the recent observation of structural superlubricity under ambient ...