Obtaining full contact for measuring polydimethylsiloxane mechanical properties with flat punch nanoindentation
Abstract(#br)Procedure to establish full contact between the sample and the 1\u003cce:hsp sp=\"0.25\"/\u003emm diameter cylindrical flat punch tip to measure polydimethylsiloxane (PDMS) mechanical properties using the Hysitron TriboIndenter is described. This procedure differs from the standard automated indentation because each indent has to be performed manually after establishing full contact with the sample surface. Incomplete contact happens because of the sample tilt with respect to the flat punch surface and results in incorrect elastic modulus values.