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Quantitative and Nanoscale Surface Potential Tracking of Ionic and Organic Adsorbates at sub-Monolayer Coverage

Published online by Cambridge University Press:  01 February 2011

L. M. Eng ,
Ch. Loppacher  and
U. Zerweck
L. M. Eng*
Affiliation:
Institute of Applied Photophysics, University of Technology Dresden, Germany
Ch. Loppacher
Affiliation:
Institute of Applied Photophysics, University of Technology Dresden, Germany
U. Zerweck
Affiliation:
Institute of Applied Photophysics, University of Technology Dresden, Germany
*
# corresponding address: [email protected]
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Abstract

We use an improved setup for deducing quantitative surface potential values by means of frequency modulated Kelvin-probe force microscopy (FM-KPFM). This method is sensitive to the electrostatic force gradient rather than the absolute force probed in KPFM so far, and therefore provides both a higher lateral resolution and quantitative values. Furthermore, FM-KPFM allows using cantilevers with high spring constants which even favors both the stability and increased topographic resolution. Here, we apply FM-KPFM to deduce interfacial electrical properties of the sub-monolayer coverage of three adsorbates on metal substrates: lithium chloride films, Copper-porphyrines, and C60 molecules.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 838: Symposium O – Scanning Probe and Other Novel Microscopies of Local Phenomena in Nanostructured Materials , 2004 , O1.10
Copyright
Copyright © Materials Research Society 2005

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References

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