Sensitivity and resonant frequency of an AFM with sidewall and top-surface probes for both flexural and torsional modes

The resonant frequencies and flexural sensitivities of an atomic force microscope (AFM) with assembled cantilever probe (ACP) are studied. This ACP comprises a horizontal cantilever, a vertical extension and two tips located at the free ends of the cantilever and the extension, which makes the AFM c...

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Bibliographic Details
Published in:International journal of mechanical sciences 2010-10, Vol.52 (10), p.1357-1365
Main Authors: Kahrobaiyan, M.H., Ahmadian, M.T., Haghighi, P., Haghighi, A.
Format: Article
Language:English
Subjects:
Atomic force microscopes
Atomic force microscopy
Atomic force microscopy (AFM)
Contact
Electromechanical technique
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Horizontal
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Microstructure
Nano- and microstructure
Physics
Resonant frequencies
Scanning
Scanning probe microscopes, components and techniques
Solid mechanics
Stiffness
Structural and continuum mechanics
Topography
Vibration mode
Vibration sensitivity
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:The resonant frequencies and flexural sensitivities of an atomic force microscope (AFM) with assembled cantilever probe (ACP) are studied. This ACP comprises a horizontal cantilever, a vertical extension and two tips located at the free ends of the cantilever and the extension, which makes the AFM capable of simultaneous topography at top surface and sidewalls of microstructures especially microgears, which consequently leads to a time-saving swift scanning process. In this work, the effects of the sample surface contact stiffness and the geometrical parameters such as the ratio of the vertical extension length to the horizontal cantilever length and the distance of the vertical extension from clamped end of the horizontal cantilever on both flexural and torsional resonant frequencies and sensitivities are assessed. These geometrical effects are illustrated in some figures. The results show that the low-order vibration modes are more sensitive for low values of the contact stiffness, but the situation is reversed for high values.
ISSN:0020-7403
1879-2162
DOI:10.1016/j.ijmecsci.2010.06.013