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Multifrequency Tapping-Mode Atomic Force Microscopy Beyond Three Eigenmodes in Ambient Air



Santiago D. Solares Rivera, Sang M. An, Chris Long


We present an exploratory study of multimodal tapping-mode atomic force microscopy driving more than three cantilever eigenmodes. We present tetramodal (4-eigenmode) imaging experiments conducted on a thin Teflon film and computational simulations of pentamodal (5-eigenmode) cantilever dynamics and spectroscopy, focusing on the case of large amplitude ratio between the fundamental eigenmode and the higher eigenmodes. We discuss the dynamic complexities of the tip response in time and frequency space, as well as the average amplitude and phase response. We also illustrate typical images and spectroscopy curves and provide a very brief description of the observed contrast. Overall, our findings are promising in that they help open the door to increasing sophistication and greater versatility in multifrequency AFM through the incorporation of a larger number of driven eigenmodes, and in highlighting specific future research opportunities.
Beilstein Journal of Nanotechnology


Multifrequency atomic force microscopy, bimodal, trimodal, multimodal, amplitude-modulation, frequency-modulation, open loop


Solares Rivera, S. , An, S. and Long, C. (2014), Multifrequency Tapping-Mode Atomic Force Microscopy Beyond Three Eigenmodes in Ambient Air, Beilstein Journal of Nanotechnology, [online], (Accessed July 17, 2024)


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Created September 24, 2014, Updated October 12, 2021