Electrical characterization under strain was performed using a tensile tester (Zwick i-Line, Zwick/Roell) and an LCR Meter (IM3536, Hioki). Sample fabrication followed the standard procedure with one modification: prior to encapsulation, PEN foil squares were placed on the gold at both ends of the macroscopic track where electrical connections would be established, serving as a stencil. After PDMS spin-coating but before curing, these PEN foil squares were removed to leave exposed gold contact areas. Following PDMS cure, the exposed areas were electrically connected to pin connectors using silver paste (Sigma-Aldrich 901769). Four-point measurements were conducted by connecting the LCR meter to the pin connectors. For maximum strain tests, the stretching rate was set to 1%/s. For cycling tests, a rate of 17%/s was used in both directions.