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27 April 2024 |
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Contrast Mechanism in Heterodyne Force Microscopy: Friction at Shaking Nanoparticles | | G.J. Verbiest
; T.H. Oosterkamp
; M.J. Rost
; | | Date: |
4 Jul 2013 | | Abstract: | To pinpoint the physical mechanism that is responsible for the contrast
formation in Heterodyne Force Microscopy, we perform a quantitative analysis,
in which we compare our experimentally observed contrasts with simulations and
calculations. Firstly, we show that the contrasts greatly depend on both the
applied contact force and on the precise ultrasonic excitation scheme used. Our
analysis shows that we can rule out Rayleigh scattering, variations in sample
(visco)elasticity, damping of the ultrasonic tip motion, and ultrasound
attenuation in the nanoparticles and finally have to conclude that friction at
shaking nanoparticles is the only remaining physical contrast formation
mechanism. We find additional evidence for this mechanism in an estimate of the
involved energy dissipation. | | Source: | arXiv, 1307.1292 | | Services: | Forum | Review | PDF | Favorites | |
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