Recent Progress in Nanoscale Indentation of Polymers Using the AFM
Mark R. VanLandingham, John S. Villarrubia, G Meyers
Regardless of the type of test, reliable indentation measurements require knowledge of the shape of the indenter tip. For indentation measurements involving sub-micrometer scale contacts, accurate knowledge of the tip shape can be difficult to achieve. In this paper, a technique referred to as blind reconstruction is applied to the measurement of tip shapes of indenters used in conjunction with the atomic force microscope (AFM) to indent polymeric materials. This method offers the potential for material independent calibration of indenter tips with high spatial resolution. Initial results from blind reconstruction are compared to results of an indentation tip shape calibration method, in which a reference material of known modulus is indented using a range of applied loads. Discrepancies between the two sets of results are discussed in terms of experimental uncertainties.
Proceedings of Society for Engineering Mechanics IX International Congress on Experimental Mechanics
Bethel, CT, USA
atomic force microscopy, blind reconstruction, depth-sensing indenter, nanoindentation
, Villarrubia, J.
and Meyers, G.
Recent Progress in Nanoscale Indentation of Polymers Using the AFM, Proceedings of Society for Engineering Mechanics IX International Congress on Experimental Mechanics, Bethel, CT, USA
(Accessed March 2, 2024)