Scanning force microscopy experiments probing micromechanical properties on polymer surfaces using harmonically modulated friction techniques - I. Principles of operation
- Applying a high-frequency lateral vibration between the sample surface and the tip of a scanning force microscope (SFM), a harmonically modulated lateral (friction) force image can be obtained using lock-in techniques. The principles of operation are explained, in particular the dramatic decrease of image artefacts generally caused by topography cross-talk and laser beam interference. Flat interfaces between the two immiscible polymers, poly(methyl methacrylate) (PMMA) and polystyrene (PS), are prepared on a sodium chloride single crystal from the melt. These samples are used to evaluate the appropriate model for the tip-sample interaction geometry. The relationship between frictional and normal force does not follow Amonton's law. This shows that a single-asperity interaction between the tip and sample surface can be considered. Using the new technique, local measurements of shear strength and Young's modulus can be performed.
Autor*innen: | Heinz SturmORCiD |
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Dokumenttyp: | Zeitschriftenartikel |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | Macromolecular symposia |
Jahr der Erstveröffentlichung: | 1999 |
Verlag: | Wiley-VCH Verl. |
Verlagsort: | Weinheim, Germany |
Jahrgang/Band: | 147 |
Erste Seite: | 249 |
Letzte Seite: | 258 |
Freie Schlagwörter: | Atomic-scale friction; Nanotribology; Tip |
DOI: | 10.1002/masy.19991470124 |
ISSN: | 1022-1360 |
ISSN: | 0258-0322 |
ISSN: | 1521-3900 |
Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Ja |
Datum der Eintragung als referierte Publikation: | 14.06.2016 |