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Scanning-probe Single-electron Capacitance Spectroscopy
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Localized charge imaging with scanning Kelvin probe microscopy.

M F Orihuela1, A M Somoza, J Colchero

  • 1Dep. de Física-CIOyN, Universidad de Murcia, E-30100 Murcia, Spain.

Nanotechnology
|December 7, 2016
PubMed
Summary
This summary is machine-generated.

We present a simple method to model scanning Kelvin probe microscopy images of localized charges on insulating materials. This approach accurately predicts experimental data, enabling quantitative analysis of charge domains.

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Area of Science:

  • Materials Science
  • Surface Science
  • Microscopy

Background:

  • Scanning Kelvin probe microscopy (SKPM) is crucial for analyzing surface potential.
  • Interpreting SKPM images of insulating materials with localized charges presents challenges.
  • Accurate modeling is needed for quantitative analysis of charge distribution.

Purpose of the Study:

  • To develop an intuitive and easily implementable method for modeling SKPM images.
  • To interpret SKPM images of insulating samples with localized charges.
  • To enable quantitative analysis of charge domains.

Main Methods:

  • The study employs the image charges method for modeling.
  • The approach was validated against experimental measurements.
  • Polymethyl methacrylate discontinuous films with injected charge domains were used.

Main Results:

  • The proposed method shows consistent agreement with experimental lateral profiles.
  • Spectroscopy tip-sample distance curves also validated the model's predictions.
  • Quantitative information on total charge and domain size can be obtained.

Conclusions:

  • The developed method provides a reliable way to model and interpret SKPM images of localized charges.
  • It facilitates quantitative assessment of charge domains in insulating materials.
  • The procedure aids in optimizing SKPM measurement parameters.