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Contact resonance atomic force microscopy for viscoelasticity



Donna C. Hurley, Philip Yuya, J Turner


We present a quantitative method for determining the viscoelastic properties of materials with nanometer spatial resolution. The approach is based on the atomic force acoustic microscopy (AFAM) technique that involves the resonant frequencies of the AFM cantilever when its tip is in contact with a sample surface. We derive expressions for the sample's visoelastic properties in terms of the cantilever's frequency response and damping losses. We demonstrate the approach by obtaining experimental values for the storage and loss moduli of a poly methyl methacrylate (PPMA) film using a polystyrene sample as a reference material. Experimental techniques and system calibration methods to perform materials-property measurements are also presented.
Journal of Applied Physics


viscoelastic properties, contact-resonance AFM, polymers


Hurley, D. , Yuya, P. and Turner, J. (2008), Contact resonance atomic force microscopy for viscoelasticity, Journal of Applied Physics, [online], (Accessed May 20, 2024)


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Created October 15, 2008, Updated February 19, 2017