Showing papers by "James C. Phillips published in 1994"
DOI•
03 Jun 1994
TL;DR: In this article, the authors consider the case of a chemically active AFM tip experiencing a bistable potential near a substrate while being driven by a periodic force of frequency Ω.
Abstract: We consider the case of a chemically active AFM tip experiencing a bistable potential near a substrate while being driven by a periodic force of frequency Ω. The average position of such a tip traces a hysteretic loop which encircles an area π (Ω), which can reveal information on the tip-substrate interaction and on tip friction. We model this situation via a Smoluchowski diffusion equation and provide numerical results as well as construct asymptotic expansions for (Ω) in the limits of high and low frequency.
3 citations