1：Experimental Design and Method Selection:

The study involves surface functionalization of chitosan substrates with 11-aminoundecanoic acid (11-AA) to enhance bonding with silver nanowires (AgNWs). Methods include spin-coating, annealing, and characterization of electrical, optical, and mechanical properties.

2：Sample Selection and Data Sources:

Chitosan thin-films are prepared from deacetylated chitosan dissolved in acetic acid with glycerol as a plasticizer. AgNW solutions are sourced commercially.

3：List of Experimental Equipment and Materials:

Equipment includes UV-visible spectrophotometer (Perkin Elmer), thermal gravimetric analyzer, SEM (Hitachi S-2700), source measurement unit (Keithley 2401), custom-made motion stage, spectrophotometer (CS-2000, Minolta), IR camera (TiS45, Fluke). Materials include chitosan (Sigma Aldrich), 11-AA (Sigma Aldrich), AgNW solutions (Nanopyxis Co., Ltd), PVDF (Sigma Aldrich), ZnS, ethyl cellulose, N,N-dimethylformamide, acetic acid, glycerol, deionized water.

4：Experimental Procedures and Operational Workflow:

Chitosan films are prepared by dissolving in acetic acid, adding glycerol, filtering, and drying. Substrates are plasma-treated, coated with 11-AA, annealed, then coated with AgNWs via spin-coating and annealing. Electrical and optical properties are measured. Stretchable devices (ACEL and heaters) are fabricated by layering materials and testing under strain.

5：Data Analysis Methods:

Sheet resistance measured by van der Pauw method, transmittance by UV-vis spectrophotometry, SEM for surface imaging, resistance under strain with sourcemeter, luminance and temperature with spectrophotometer and IR camera. Figure of merit calculated as T^10 / Rs.