Parametrically coupled multiharmonic force imaging
Applied Physics Letters
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Abak, M. K., Aktas, O., Mammadov, R., Gürsel, İ., & Dâna, A. (2008). Parametrically coupled multiharmonic force imaging. Applied Physics Letters, 92(22), 223113.
Please cite this item using this persistent URLhttp://hdl.handle.net/11693/11619
We report use of nonlinear tip-sample interactions to parametrically convert the frequency components of periodic tip-sample interaction forces to frequencies where they can be resonantly detected. One flexural mode of a cantilever is used for tapping-mode imaging and another flexural mode is used for detection of forces converted in presence of an externally injected mechanical oscillation at the difference frequency of the detecting mode and a harmonic of the tapping mode. Material contrast in attractive and repulsive regimes are demonstrated on samples with polymethyl methacrylate patterns and with deoxyribonucleic acid strands on silicon. Parametrically coupled multiharmonic force imaging - ResearchGate. Available from: http://www.researchgate.net/publication/234925290_Parametrically_coupled_multiharmonic_force_imaging [accessed Aug 28, 2015].