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Reconstruction of a hidden topography by single AFM force–distance curves
Silbernagl, D. ; Cappella, B.
Surface science, 2009-08, Vol.603 (16), p.2363-2369
[Periódico revisado por pares]
Kidlington: Elsevier B.V
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Título:
Reconstruction of a hidden topography by single AFM force–distance curves
Autor:
Silbernagl, D.
;
Cappella, B.
Assuntos:
Atomic Force Microscopy
;
Composite materials
;
Condensed matter: electronic structure, electrical, magnetic, and optical properties
;
Condensed matter: structure, mechanical and thermal properties
;
Cross-disciplinary physics: materials science
;
rheology
;
Exact sciences and technology
;
Force–distance curves
;
Interfaces
;
Mechanical properties
;
Physics
É parte de:
Surface science, 2009-08, Vol.603 (16), p.2363-2369
Notas:
ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição:
Force–distance curves have been acquired with an Atomic Force Microscope on polymethyl methacrylate with embedded glass spheres. The glass spheres provide a stiff substrate with an irregular and complex topography hidden underneath a compliant and even polymer film. This situation is a special case of a mechanical double-layer, which we examined in detail in previous experiments. Up to now uniform and non-uniform polymer films on an even substrate were examined. The film thickness on each point of the sample surface was known and force–distance curves could be averaged in groups according to the film thickness. In this way we were able to develop a semi empirical approach which allows describing the shape of averaged force–distance curves depending on the Young’s moduli of the involved materials and on the film thickness. In this experiment we reconstruct a hidden topography, i.e., we determine the polymer thickness on each point of the sample by analyzing single force–distance curves with our semi empirical equation. The accuracy reached by this approach permits to obtain a reconstruction of the shape and position of the embedded particles limited by a maximum detection depth. Single curves are also analyzed qualitatively in order to locate areas where the adhesion at the polymer/glass interface is weak or the two phases are detached.
Editor:
Kidlington: Elsevier B.V
Idioma:
Inglês
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