Figure 3: Tensile testing procedures and the effect of drag force.
(a) The tensile testing system consists of a load cell, a linear stage and a DIC camera on an anti-vibration table. (b) The ultra-thin Au film afloat on the water surface with alignment and grip attachment. Specimen gripping is performed by attaching PDMS-coated grips to the specimen’s grip sections. Meanwhile, alignment is ensured through the DIC camera. (c) The ultra-thin Au film specimen is strongly gripped by van der Waals adhesion between the PDMS coating on the grips and the specimen surface. (d) Tensile test is performed by linear stage with the strain rate of 0.06 × 10−3 per s, and fracture occurred in the middle of the specimen’s gauge length. (e) Drag force measurement has been made by attaching only one side of the specimen to the load cell connected to the linear stage.
