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Issue 40, 2017
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Charge distribution from SKPM images

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Inferring the surface charge distribution from experimental Kelvin probe microscopy measurements is usually a hard task. Although several approximations have been proposed in order to estimate the effect of these charges, the real inverse problem has not been addressed so far. In this paper, we propose a fast and intuitive method based on Fast Fourier Transform algorithms that allows the surface charge distribution to be obtained directly from the experimental Kelvin voltage measurements. With this method, quantitative physical information such as the total charge and charge position is accessible even in complex charge distributions such as highly insulating polymer surfaces. Moreover, one of the strongest points is that sub-tip resolution is achieved, and therefore the usually unknown charge size can be estimated.

Graphical abstract: Charge distribution from SKPM images

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Publication details

The article was received on 08 Aug 2017, accepted on 15 Sep 2017 and first published on 15 Sep 2017

Article type: Paper
DOI: 10.1039/C7CP05401G
Phys. Chem. Chem. Phys., 2017,19, 27299-27304

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    Charge distribution from SKPM images

    J. F. Gonzalez, A. M. Somoza and E. Palacios-Lidón, Phys. Chem. Chem. Phys., 2017, 19, 27299
    DOI: 10.1039/C7CP05401G

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