Theory of amplitude modulated electrostatic force microscopy for dielectric measurements in liquids at MHz frequencies.
Nanotechnology
; 24(41): 415709, 2013 Oct 18.
Article
em En
| MEDLINE
| ID: mdl-24061045
ABSTRACT
A theoretical analysis of amplitude modulated electrostatic force microscopy (AM-EFM) in liquid media at MHz frequencies, based on a simple tip-sample parallel plate model, is presented. The model qualitatively explains the main features of AM-EFM in liquid media and provides a simple explanation of how the measured electric forces are affected by the frequency of the applied voltage, the tip-sample distance, the ionic concentration, the relative dielectric constant of the solution, and the relative dielectric constant and thickness of the sample. These results provide a simple framework for the design of AM-EFM measurements for localized dielectric characterization in liquid media.
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Coleções:
01-internacional
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MEDLINE
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article