Abstract
The nonlinear dynamics of an atomic force microcantilever (AFM) with an attachedmulti-walled carbon nanotube (MWCNT) tip is investigated experimentally andtheoretically. We present the experimental nonlinear frequency response of a MWCNTtipped microcantilever in the tapping mode. Several unusual features in the responsedistinguish it from those traditionally observed for conventional tips. The MWCNT tippedAFM probe is apparently immune to conventional imaging instabilities related to thecoexistence of attractive and repulsive tapping regimes. A theoretical interactionmodel for the system using an Euler elastica MWCNT model is developed andfound to predict several unusual features of the measured nonlinear response.
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