Frequency response of atomic force microscope cantilever driven by fluid

Volkov, A. O.; Burnell-Gray, J. S.; Datta, P. K.
November 2004
Applied Physics Letters;11/29/2004, Vol. 85 Issue 22, p5397
Academic Journal
The most widely used dynamic atomic force microscopy technique in fluids is the piezo-drive, where a cantilever is driven by fluid excited by a piezoelectric. The study of the frequency response of the fluid-driven cantilever is usually interfered by the resonances of a fluid cell. In this work an active cantilever has been used to drive fluid in the vicinity of a passive cantilever. The local drive resulted in the measured response free from spurious resonances. In contrast to a magnetically driven cantilever, the oscillations of the fluid-driven cantilever tend at high frequency to finite amplitude.


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