title: Nanomechanical characterization by double-pass force-distance mapping.
abstract: We demonstrate high speed force-distance mapping using a double-pass scheme. The topography is measured in tapping mode in the first pass and this information is used in the second pass to move the tip over the sample. In the second pass, the cantilever dither signal is turned off and the sample is vibrated. Rapid (few kHz frequency) force-distance curves can be recorded with small peak interaction force, and can be processed into an image. Such a double-pass measurement eliminates the need for feedback during force-distance measurements. The method is demonstrated on self-assembled peptidic nanofibers.
authors.affiliation: UNAM Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey.
authors.forename: Yavuz S
authors.initials: YS
authors.lastname: Dagdas
authors.forename: M Necip
authors.initials: MN
authors.lastname: Aslan
authors.forename: Ayse B
authors.initials: AB
authors.lastname: Tekinay
authors.forename: Mustafa O
authors.initials: MO
authors.lastname: Guler
authors.forename: Aykutlu
authors.initials: A
authors.lastname: Dâna