1：Experimental Design and Method Selection:

The study uses inkjet printing to deposit silver nanoparticle ink on oxygen plasma-treated PDMS films, followed by drying at 60°C. The method leverages the viscoelastic properties of PDMS and the self-healing nature of unsintered silver nanoparticle films under strain.

2：Sample Selection and Data Sources:

Samples include PDMS films (Elastosil from Wacker Chemie AG) treated with oxygen plasma and printed with silver nanoparticle ink (DGP-40LT-15C from Advanced Nano Products). Data on resistance, strain, and recovery are collected through cyclic stretching tests.

3：List of Experimental Equipment and Materials:

Equipment includes an oxygen plasma asher (Femto Plasma Asher from Diener Electronics), inkjet printer (Epson Workforce 2010W), oven (Memmert UF 55), optical microscope (Axiolab A1 MAT with Axiocam 105 color camera from Carl Zeiss AG), profilometer (Dektak XT from Bruker Corporation), SEM (Nvision 40 from Carl Zeiss AG), custom-built stretching setup with stepper motor (Nanotec Electronic GmbH & Co KG), multimeter (Keithley 2700 from Keithley Instruments), and LabView for automation. Materials include AgNP ink, PDMS film, copper tape, Sylgard 184 PDMS, conductive epoxy, and LEDs.

4：Experimental Procedures and Operational Workflow:

PDMS films are plasma-treated, inkjet-printed with AgNP ink, dried at 60°C for 30 min, and characterized. Stretching tests involve cyclic elongation (e.g., 20% strain for 10,000 cycles) with resistance measurements after relaxation. Integration into wearables involves gluing samples to tights and assembling LEDs.

5：Data Analysis Methods:

Resistance is measured using a two-point method with a multimeter, and sheet resistance is calculated based on line dimensions. Optical and SEM imaging analyze crack formation and recovery. Statistical analysis of resistance changes over cycles is performed.