A statistical mechanical model is presented to explain recent atomic force microscope (AFM) measurements on the equilibrium forces on a polymer chain adsorbed on a surface with one end attached to the AFM tip. We explore the dependence of this adsorption force on the depth and range of the surface potential and the characteristics of the polymer chain. We show that the force distribution is likely due to energetic surface inhomogeneities. The effect of thermodynamic force fluctuations is also discussed.
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Hanke et al. (2004) studied this question.
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