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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/238041
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- Interpreting atomic force microscopy measurements of hydrodynamic and surface forces with nonlinear parametric estimation
- Cui, Song; Manica, Rogerio; Tabor, Rico F.; Chan, Derek Y. C.
- A nonlinear parameter estimation method has been developed to extract the separation-dependent surface force and cantilever spring constant from atomic force microscope data taken at different speeds for the interaction between a silica colloidal probe and plate in aqueous solution. The distinguishing feature of this approach is that it exploits information from the velocity dependence of the force-displacement data due to hydrodynamic interaction to provide an unbiased estimate of the functional form of the separation-dependent surface force. An assumed function for the surface force with unknown parameters is not required. In addition, the analysis also yields a consistent estimate of the in situ cantilever spring constant. In combination with data from static force measurements, this approach can further be used to quantify the extent of hydrodynamic slip.
- Publication type
- Journal article
- Research centre
- Swinburne University of Technology. Faculty of Life and Social Sciences
- Review of Scientific Instruments, Vol. 83, no. 10 (Oct 2012), article no. 103702
- Publication year
- FOR Code(s)
- 02 Physical Sciences; 03 Chemical Sciences; 09 Engineering
- Atomic force microscope; Atomic force microscopy; Hydrodynamic slip; Nonlinear parametric estimation; Surface forces
- American Institute of Physics
- Publisher URL
- Copyright © 2012 American Institute of Physics. The published version is reproduced with the kind permission of the publisher.
- Additional information
- The authors acknowledge support from the Australian Research Council Discovery Project Grant.
- Full text
- Peer reviewed